Spirc: Replace Mecury with Dealer (#1356)

This was a huge effort by photovoltex@gmail.com with help from the community.
Over 140 commits were squashed. Below, their commit messages are kept unchanged.

---

* dealer wrapper for ease of use

* improve sending protobuf requests

* replace connect config with connect_state config

* start integrating dealer into spirc

* payload handling, gzip support

* put connect state consistent

* formatting

* request payload handling, gzip support

* expose dealer::protocol, move request in own file

* integrate handle of connect-state commands

* spirc: remove ident field

* transfer playing state better

* spirc: remove remote_update stream

* spirc: replace command sender with connect state update

* spirc: remove device state and remaining unused methods

* spirc: remove mercury sender

* add repeat track state

* ConnectState: add methods to replace state in spirc

* spirc: move context into connect_state, update load and next

* spirc: remove state, adjust remaining methods

* spirc: handle more dealer request commands

* revert rustfmt.toml

* spirc: impl shuffle

- impl shuffle again
- extracted fill up of next tracks in own method
- moved queue revision update into next track fill up
- removed unused method `set_playing_track_index`
- added option to specify index when resetting the playback context
- reshuffle after repeat context

* spirc: handle device became inactive

* dealer: adjust payload handling

* spirc: better set volume handling

* dealer: box PlayCommand (clippy warning)

* dealer: always respect queued tracks

* spirc: update duration of track

* ConnectState: update more restrictions

* cleanup

* spirc: handle queue requests

* spirc: skip next with track

* proto: exclude spirc.proto
- move "deserialize_with" functions into own file
- replace TrackRef with ProvidedTrack

* spirc: stabilize transfer/context handling

* core: cleanup some remains

* connect: improvements to code structure and performance

- use VecDeque for next and prev tracks

* connect: delayed volume update

* connect: move context resolve into own function

* connect: load context asynchronous

* connect: handle reconnect

- might currently steal the active devices playback

* connect: some fixes and adjustments

- fix wrong offset when transferring playback
- fix missing displayed context in web-player
- remove access_token from log
- send correct state reason when updating volume
- queue track correctly
- fix wrong assumption for skip_to

* connect: replace error case with option

* connect: use own context state

* connect: more stabilising

- handle SkipTo having no Index
- handle no transferred restrictions
- handle no transferred index
- update state before shutdown, for smoother reacquiring

* connect: working autoplay

* connect: handle repeat context/track

* connect: some quick fixes

- found self-named uid in collection after reconnecting

* connect: handle add_to_queue via set_queue

* fix clippy warnings

* fix check errors, fix/update example

* fix 1.75 specific error

* connect: position update improvements

* connect: handle unavailable

* connect: fix incorrect status handling for desktop and mobile

* core: fix dealer reconnect

- actually acquire new token
- use login5 token retrieval

* connect: split state into multiple files

* connect: encapsulate provider logic

* connect: remove public access to next and prev tracks

* connect: remove public access to player

* connect: move state only commands into own file

* connect: improve logging

* connect: handle transferred queue again

* connect: fix all-features specific error

* connect: extract transfer  handling into own file

* connect: remove old context model

* connect: handle more transfer cases correctly

* connect: do auth_token pre-acquiring earlier

* connect: handle play with skip_to by uid

* connect: simplified cluster update log

* core/connect: add remaining set value commands

* connect: position update workaround/fix

* connect: some queue cleanups

* connect: add uid to queue

* connect: duration as volume delay const

* connect: some adjustments and todo cleanups

- send volume update before general update
- simplify queue revision to use the track uri
- argument why copying the prev/next tracks is fine

* connect: handle shuffle from set_options

* connect: handle context update

* connect: move other structs into model.rs

* connect: reduce SpircCommand visibility

* connect: fix visibility of model

* connect: fix: shuffle on startup isn't applied

* connect: prevent loading a context with no tracks

* connect: use the first page of a context

* connect: improve context resolving

- support multiple pages
- support page_url of context
- handle single track

* connect: prevent integer underflow

* connect: rename method for better clarity

* connect: handle mutate and update messages

* connect: fix 1.75 problems

* connect: fill, instead of replace next page

* connect: reduce context update to single method

* connect: remove unused SpircError, handle local files

* connect: reduce nesting, adjust initial transfer handling

* connect: don't update volume initially

* core: disable trace logging of handled mercury responses

* core/connect: prevent takeover from other clients, handle session-update

* connect: add queue-uid for set_queue command

* connect: adjust fields for PlayCommand

* connect: preserve context position after update_context

* connect: unify metadata modification

- only handle `is_queued` `true` items for queue

* connect: polish request command handling

 - reply to all request endpoints
 - adjust some naming
 - add some docs

* connect: add uid to tracks without

* connect: simpler update of current index

* core/connect: update log msg, fix wrong behavior

- handle became inactive separately
- remove duplicate stop
- adjust docs for websocket request

* core: add option to request without metrics and salt

* core/context: adjust context requests and update

- search should now return the expected context
- removed workaround for single track playback
- move local playback check into update_context
- check track uri for invalid characters
- early return with `?`

* connect: handle possible search context uri

* connect: remove logout support

- handle logout command
- disable support for logout
- add todos for logout

* connect: adjust detailed tracks/context handling

- always allow next
- handle no prev track available
- separate active and fill up context

* connect: adjust context resolve handling, again

* connect: add autoplay metadata to tracks

- transfer into autoplay again

* core/connect: cleanup session after spirc stops

* update CHANGELOG.md

* playback: fix clippy warnings

* connect: adjust metadata

- unify naming
- move more metadata infos into metadata.rs

* connect: add delimiter between context and autoplay playback

* connect: stop and resume correctly

* connect: adjust context resolving

- improved certain logging parts
- preload autoplay when autoplay attribute mutates
- fix transfer context uri
- fix typo
- handle empty strings for resolve uri
- fix unexpected stop of playback

* connect: ignore failure during stop

* connect: revert resolve_uri changes

* connect: correct context reset

* connect: reduce boiler code

* connect: fix some incorrect states

- uid getting replaced by empty value
- shuffle/repeat clearing autoplay context
- fill_up updating and using incorrect index

* core: adjust incorrect separator

* connect: move `add_to_queue` and `mark_unavailable` into tracks.rs

* connect: refactor - directly modify PutStateRequest

- replace `next_tracks`, `prev_tracks`, `player` and `device` with `request`
- provide helper methods for the removed fields

* connect: adjust handling of context metadata/restrictions

* connect: fix incorrect context states

* connect: become inactive when no cluster is reported

* update CHANGELOG.md

* core/playback: preemptively fix clippy warnings

* connect: minor adjustment to session changed

* connect: change return type changing active context

* connect: handle unavailable contexts

* connect: fix previous restrictions blocking load with shuffle

* connect: update comments and logging

* core/connect: reduce some more duplicate code

* more docs around the dealer

CHANGELOG.md

@@ -9,8 +9,17 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
+- [connect] Replaced `ConnectConfig` with `ConnectStateConfig` (breaking)
+- [connect] Replaced `playing_track_index` field of `SpircLoadCommand` with `playing_track` (breaking)
+- [connect] Replaced Mercury usage in `Spirc` with Dealer
+
 ### Added
 
+- [connect] Add `seek_to` field to `SpircLoadCommand` (breaking)
+- [connect] Add `repeat_track` field to `SpircLoadCommand` (breaking)
+- [playback] Add `track` field to `PlayerEvent::RepeatChanged` (breaking)
+- [core] Add `request_with_options` and `request_with_protobuf_and_options` to `SpClient`
+
 ### Fixed
 
 - [core] Fix "no native root CA certificates found" on platforms unsupported

Cargo.lock

@@ -630,6 +630,15 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "crc32fast"
+version = "1.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a97769d94ddab943e4510d138150169a2758b5ef3eb191a9ee688de3e23ef7b3"
+dependencies = [
+ "cfg-if",
+]
+
 [[package]]
 name = "crossbeam-utils"
 version = "0.8.20"
@@ -894,6 +903,16 @@ version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0ce7134b9999ecaf8bcd65542e436736ef32ddca1b3e06094cb6ec5755203b80"
 
+[[package]]
+name = "flate2"
+version = "1.0.33"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "324a1be68054ef05ad64b861cc9eaf1d623d2d8cb25b4bf2cb9cdd902b4bf253"
+dependencies = [
+ "crc32fast",
+ "miniz_oxide",
+]
+
 [[package]]
 name = "fnv"
 version = "1.0.7"
@@ -1941,7 +1960,6 @@ dependencies = [
 name = "librespot-connect"
 version = "0.6.0-dev"
 dependencies = [
- "form_urlencoded",
  "futures-util",
  "librespot-core",
  "librespot-playback",
@@ -1949,11 +1967,11 @@ dependencies = [
  "log",
  "protobuf",
  "rand",
- "serde",
  "serde_json",
  "thiserror",
  "tokio",
  "tokio-stream",
+ "uuid",
 ]
 
 [[package]]
@@ -1965,6 +1983,7 @@ dependencies = [
  "byteorder",
  "bytes",
  "data-encoding",
+ "flate2",
  "form_urlencoded",
  "futures-core",
  "futures-util",
@@ -1991,6 +2010,7 @@ dependencies = [
  "pin-project-lite",
  "priority-queue",
  "protobuf",
+ "protobuf-json-mapping",
  "quick-xml",
  "rand",
  "rsa",
@@ -2744,6 +2764,17 @@ dependencies = [
  "thiserror",
 ]
 
+[[package]]
+name = "protobuf-json-mapping"
+version = "3.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9b445cf83c9303695e6c423d269759e139b6182d2f1171e18afda7078a764336"
+dependencies = [
+ "protobuf",
+ "protobuf-support",
+ "thiserror",
+]
+
 [[package]]
 name = "protobuf-parse"
 version = "3.7.1"

connect/Cargo.toml

@@ -9,16 +9,15 @@ repository = "https://github.com/librespot-org/librespot"
 edition = "2021"
 
 [dependencies]
-form_urlencoded = "1.0"
 futures-util = "0.3"
 log = "0.4"
 protobuf = "3.5"
 rand = "0.8"
-serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 thiserror = "1.0"
 tokio = { version = "1", features = ["macros", "parking_lot", "sync"] }
 tokio-stream = "0.1"
+uuid = { version = "1.11.0", features = ["v4"] }
 
 [dependencies.librespot-core]
 path = "../core"

connect/src/config.rs

@@ -1,22 +0,0 @@
-use crate::core::config::DeviceType;
-
-#[derive(Clone, Debug)]
-pub struct ConnectConfig {
-    pub name: String,
-    pub device_type: DeviceType,
-    pub is_group: bool,
-    pub initial_volume: Option<u16>,
-    pub has_volume_ctrl: bool,
-}
-
-impl Default for ConnectConfig {
-    fn default() -> ConnectConfig {
-        ConnectConfig {
-            name: "Librespot".to_string(),
-            device_type: DeviceType::default(),
-            is_group: false,
-            initial_volume: Some(50),
-            has_volume_ctrl: true,
-        }
-    }
-}

connect/src/context.rs

@@ -1,121 +0,0 @@
-// TODO : move to metadata
-
-use crate::core::spotify_id::SpotifyId;
-use crate::protocol::spirc::TrackRef;
-
-use serde::{
-    de::{Error, Unexpected},
-    Deserialize,
-};
-
-#[derive(Deserialize, Debug, Default, Clone)]
-pub struct StationContext {
-    pub uri: String,
-    pub title: String,
-    #[serde(rename = "titleUri")]
-    pub title_uri: String,
-    pub subtitles: Vec<SubtitleContext>,
-    #[serde(rename = "imageUri")]
-    pub image_uri: String,
-    pub seeds: Vec<String>,
-    #[serde(deserialize_with = "deserialize_protobuf_TrackRef")]
-    pub tracks: Vec<TrackRef>,
-    pub next_page_url: String,
-    pub correlation_id: String,
-    pub related_artists: Vec<ArtistContext>,
-}
-
-#[derive(Deserialize, Debug, Default, Clone)]
-pub struct PageContext {
-    #[serde(deserialize_with = "deserialize_protobuf_TrackRef")]
-    pub tracks: Vec<TrackRef>,
-    pub next_page_url: String,
-    pub correlation_id: String,
-}
-
-#[derive(Deserialize, Debug, Default, Clone)]
-pub struct TrackContext {
-    pub uri: String,
-    pub uid: String,
-    pub artist_uri: String,
-    pub album_uri: String,
-    #[serde(rename = "original_gid")]
-    pub gid: String,
-    pub metadata: MetadataContext,
-    pub name: String,
-}
-
-#[allow(dead_code)]
-#[derive(Deserialize, Debug, Default, Clone)]
-#[serde(rename_all = "camelCase")]
-pub struct ArtistContext {
-    #[serde(rename = "artistName")]
-    artist_name: String,
-    #[serde(rename = "imageUri")]
-    image_uri: String,
-    #[serde(rename = "artistUri")]
-    artist_uri: String,
-}
-
-#[allow(dead_code)]
-#[derive(Deserialize, Debug, Default, Clone)]
-pub struct MetadataContext {
-    album_title: String,
-    artist_name: String,
-    artist_uri: String,
-    image_url: String,
-    title: String,
-    #[serde(deserialize_with = "bool_from_string")]
-    is_explicit: bool,
-    #[serde(deserialize_with = "bool_from_string")]
-    is_promotional: bool,
-    decision_id: String,
-}
-
-#[allow(dead_code)]
-#[derive(Deserialize, Debug, Default, Clone)]
-pub struct SubtitleContext {
-    name: String,
-    uri: String,
-}
-
-fn bool_from_string<'de, D>(de: D) -> Result<bool, D::Error>
-where
-    D: serde::Deserializer<'de>,
-{
-    match String::deserialize(de)?.as_ref() {
-        "true" => Ok(true),
-        "false" => Ok(false),
-        other => Err(D::Error::invalid_value(
-            Unexpected::Str(other),
-            &"true or false",
-        )),
-    }
-}
-
-#[allow(non_snake_case)]
-fn deserialize_protobuf_TrackRef<'d, D>(de: D) -> Result<Vec<TrackRef>, D::Error>
-where
-    D: serde::Deserializer<'d>,
-{
-    let v: Vec<TrackContext> = serde::Deserialize::deserialize(de)?;
-    v.iter()
-        .map(|v| {
-            let mut t = TrackRef::new();
-            //  This has got to be the most round about way of doing this.
-            t.set_gid(
-                SpotifyId::from_base62(&v.gid)
-                    .map_err(|_| {
-                        D::Error::invalid_value(
-                            Unexpected::Str(&v.gid),
-                            &"a Base-62 encoded Spotify ID",
-                        )
-                    })?
-                    .to_raw()
-                    .to_vec(),
-            );
-            t.set_uri(v.uri.to_owned());
-            Ok(t)
-        })
-        .collect::<Result<Vec<TrackRef>, D::Error>>()
-}

connect/src/lib.rs

@@ -5,6 +5,6 @@ use librespot_core as core;
 use librespot_playback as playback;
 use librespot_protocol as protocol;
 
-pub mod config;
+mod model;
-pub mod context;
 pub mod spirc;
+pub mod state;

connect/src/model.rs

@@ -0,0 +1,188 @@
+use crate::state::ConnectState;
+use librespot_core::dealer::protocol::SkipTo;
+use librespot_protocol::player::Context;
+use std::fmt::{Display, Formatter};
+use std::hash::{Hash, Hasher};
+
+#[derive(Debug)]
+pub struct SpircLoadCommand {
+    pub context_uri: String,
+    /// Whether the given tracks should immediately start playing, or just be initially loaded.
+    pub start_playing: bool,
+    pub seek_to: u32,
+    pub shuffle: bool,
+    pub repeat: bool,
+    pub repeat_track: bool,
+    pub playing_track: PlayingTrack,
+}
+
+#[derive(Debug)]
+pub enum PlayingTrack {
+    Index(u32),
+    Uri(String),
+    Uid(String),
+}
+
+impl From<SkipTo> for PlayingTrack {
+    fn from(value: SkipTo) -> Self {
+        // order of checks is important, as the index can be 0, but still has an uid or uri provided,
+        // so we only use the index as last resort
+        if let Some(uri) = value.track_uri {
+            PlayingTrack::Uri(uri)
+        } else if let Some(uid) = value.track_uid {
+            PlayingTrack::Uid(uid)
+        } else {
+            PlayingTrack::Index(value.track_index.unwrap_or_else(|| {
+                warn!("SkipTo didn't provided any point to skip to, falling back to index 0");
+                0
+            }))
+        }
+    }
+}
+
+#[derive(Debug)]
+pub(super) enum SpircPlayStatus {
+    Stopped,
+    LoadingPlay {
+        position_ms: u32,
+    },
+    LoadingPause {
+        position_ms: u32,
+    },
+    Playing {
+        nominal_start_time: i64,
+        preloading_of_next_track_triggered: bool,
+    },
+    Paused {
+        position_ms: u32,
+        preloading_of_next_track_triggered: bool,
+    },
+}
+
+#[derive(Debug, Clone)]
+pub(super) struct ResolveContext {
+    context: Context,
+    fallback: Option<String>,
+    autoplay: bool,
+    /// if `true` updates the entire context, otherwise only fills the context from the next
+    /// retrieve page, it is usually used when loading the next page of an already established context
+    ///
+    /// like for example:
+    /// - playing an artists profile
+    update: bool,
+}
+
+impl ResolveContext {
+    pub fn from_uri(uri: impl Into<String>, fallback: impl Into<String>, autoplay: bool) -> Self {
+        let fallback_uri = fallback.into();
+        Self {
+            context: Context {
+                uri: uri.into(),
+                ..Default::default()
+            },
+            fallback: (!fallback_uri.is_empty()).then_some(fallback_uri),
+            autoplay,
+            update: true,
+        }
+    }
+
+    pub fn from_context(context: Context, autoplay: bool) -> Self {
+        Self {
+            context,
+            fallback: None,
+            autoplay,
+            update: true,
+        }
+    }
+
+    // expected page_url: hm://artistplaycontext/v1/page/spotify/album/5LFzwirfFwBKXJQGfwmiMY/km_artist
+    pub fn from_page_url(page_url: String) -> Self {
+        let split = if let Some(rest) = page_url.strip_prefix("hm://") {
+            rest.split('/')
+        } else {
+            warn!("page_url didn't started with hm://. got page_url: {page_url}");
+            page_url.split('/')
+        };
+
+        let uri = split
+            .skip_while(|s| s != &"spotify")
+            .take(3)
+            .collect::<Vec<&str>>()
+            .join(":");
+
+        trace!("created an ResolveContext from page_url <{page_url}> as uri <{uri}>");
+
+        Self {
+            context: Context {
+                uri,
+                ..Default::default()
+            },
+            fallback: None,
+            update: false,
+            autoplay: false,
+        }
+    }
+
+    /// the uri which should be used to resolve the context, might not be the context uri
+    pub fn resolve_uri(&self) -> Option<&String> {
+        // it's important to call this always, or at least for every ResolveContext
+        // otherwise we might not even check if we need to fallback and just use the fallback uri
+        ConnectState::get_context_uri_from_context(&self.context)
+            .and_then(|s| (!s.is_empty()).then_some(s))
+            .or(self.fallback.as_ref())
+    }
+
+    /// the actual context uri
+    pub fn context_uri(&self) -> &str {
+        &self.context.uri
+    }
+
+    pub fn autoplay(&self) -> bool {
+        self.autoplay
+    }
+
+    pub fn update(&self) -> bool {
+        self.update
+    }
+}
+
+impl Display for ResolveContext {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        write!(
+            f,
+            "resolve_uri: <{:?}>, context_uri: <{}>, autoplay: <{}>, update: <{}>",
+            self.resolve_uri(),
+            self.context.uri,
+            self.autoplay,
+            self.update
+        )
+    }
+}
+
+impl PartialEq for ResolveContext {
+    fn eq(&self, other: &Self) -> bool {
+        let eq_context = self.context_uri() == other.context_uri();
+        let eq_resolve = self.resolve_uri() == other.resolve_uri();
+        let eq_autoplay = self.autoplay == other.autoplay;
+        let eq_update = self.update == other.update;
+
+        eq_context && eq_resolve && eq_autoplay && eq_update
+    }
+}
+
+impl Eq for ResolveContext {}
+
+impl Hash for ResolveContext {
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        self.context_uri().hash(state);
+        self.resolve_uri().hash(state);
+        self.autoplay.hash(state);
+        self.update.hash(state);
+    }
+}
+
+impl From<ResolveContext> for Context {
+    fn from(value: ResolveContext) -> Self {
+        value.context
+    }
+}

connect/src/state.rs

@@ -0,0 +1,448 @@
+pub(super) mod context;
+mod handle;
+pub mod metadata;
+mod options;
+pub(super) mod provider;
+mod restrictions;
+mod tracks;
+mod transfer;
+
+use crate::model::SpircPlayStatus;
+use crate::state::{
+    context::{ContextType, ResetContext, StateContext},
+    provider::{IsProvider, Provider},
+};
+use librespot_core::{
+    config::DeviceType, date::Date, dealer::protocol::Request, spclient::SpClientResult, version,
+    Error, Session,
+};
+use librespot_protocol::connect::{
+    Capabilities, Device, DeviceInfo, MemberType, PutStateReason, PutStateRequest,
+};
+use librespot_protocol::player::{
+    ContextIndex, ContextPage, ContextPlayerOptions, PlayOrigin, PlayerState, ProvidedTrack,
+    Suppressions,
+};
+use log::LevelFilter;
+use protobuf::{EnumOrUnknown, MessageField};
+use std::{
+    collections::hash_map::DefaultHasher,
+    hash::{Hash, Hasher},
+    time::{Duration, SystemTime, UNIX_EPOCH},
+};
+use thiserror::Error;
+
+// these limitations are essential, otherwise to many tracks will overload the web-player
+const SPOTIFY_MAX_PREV_TRACKS_SIZE: usize = 10;
+const SPOTIFY_MAX_NEXT_TRACKS_SIZE: usize = 80;
+
+#[derive(Debug, Error)]
+pub enum StateError {
+    #[error("the current track couldn't be resolved from the transfer state")]
+    CouldNotResolveTrackFromTransfer,
+    #[error("message field {0} was not available")]
+    MessageFieldNone(String),
+    #[error("context is not available. type: {0:?}")]
+    NoContext(ContextType),
+    #[error("could not find track {0:?} in context of {1}")]
+    CanNotFindTrackInContext(Option<usize>, usize),
+    #[error("currently {action} is not allowed because {reason}")]
+    CurrentlyDisallowed { action: String, reason: String },
+    #[error("the provided context has no tracks")]
+    ContextHasNoTracks,
+    #[error("playback of local files is not supported")]
+    UnsupportedLocalPlayBack,
+    #[error("track uri <{0}> contains invalid characters")]
+    InvalidTrackUri(String),
+}
+
+impl From<StateError> for Error {
+    fn from(err: StateError) -> Self {
+        use StateError::*;
+        match err {
+            CouldNotResolveTrackFromTransfer
+            | MessageFieldNone(_)
+            | NoContext(_)
+            | CanNotFindTrackInContext(_, _)
+            | ContextHasNoTracks
+            | InvalidTrackUri(_) => Error::failed_precondition(err),
+            CurrentlyDisallowed { .. } | UnsupportedLocalPlayBack => Error::unavailable(err),
+        }
+    }
+}
+
+#[derive(Debug, Clone)]
+pub struct ConnectStateConfig {
+    pub session_id: String,
+    pub initial_volume: u32,
+    pub name: String,
+    pub device_type: DeviceType,
+    pub volume_steps: i32,
+    pub is_group: bool,
+}
+
+impl Default for ConnectStateConfig {
+    fn default() -> Self {
+        Self {
+            session_id: String::new(),
+            initial_volume: u32::from(u16::MAX) / 2,
+            name: "librespot".to_string(),
+            device_type: DeviceType::Speaker,
+            volume_steps: 64,
+            is_group: false,
+        }
+    }
+}
+
+#[derive(Default, Debug)]
+pub struct ConnectState {
+    /// the entire state that is updated to the remote server
+    request: PutStateRequest,
+
+    unavailable_uri: Vec<String>,
+
+    pub active_since: Option<SystemTime>,
+    queue_count: u64,
+
+    // separation is necessary because we could have already loaded
+    // the autoplay context but are still playing from the default context
+    /// to update the active context use [switch_active_context](ConnectState::set_active_context)
+    pub active_context: ContextType,
+    pub fill_up_context: ContextType,
+
+    /// the context from which we play, is used to top up prev and next tracks
+    pub context: Option<StateContext>,
+    /// upcoming contexts, directly provided by the context-resolver
+    next_contexts: Vec<ContextPage>,
+
+    /// a context to keep track of our shuffled context,
+    /// should be only available when `player.option.shuffling_context` is true
+    shuffle_context: Option<StateContext>,
+    /// a context to keep track of the autoplay context
+    autoplay_context: Option<StateContext>,
+}
+
+impl ConnectState {
+    pub fn new(cfg: ConnectStateConfig, session: &Session) -> Self {
+        let device_info = DeviceInfo {
+            can_play: true,
+            volume: cfg.initial_volume,
+            name: cfg.name,
+            device_id: session.device_id().to_string(),
+            device_type: EnumOrUnknown::new(cfg.device_type.into()),
+            device_software_version: version::SEMVER.to_string(),
+            spirc_version: version::SPOTIFY_SPIRC_VERSION.to_string(),
+            client_id: session.client_id(),
+            is_group: cfg.is_group,
+            capabilities: MessageField::some(Capabilities {
+                volume_steps: cfg.volume_steps,
+                hidden: false, // could be exposed later to only observe the playback
+                gaia_eq_connect_id: true,
+                can_be_player: true,
+
+                needs_full_player_state: true,
+
+                is_observable: true,
+                is_controllable: true,
+
+                supports_gzip_pushes: true,
+                // todo: enable after logout handling is implemented, see spirc logout_request
+                supports_logout: false,
+                supported_types: vec!["audio/episode".into(), "audio/track".into()],
+                supports_playlist_v2: true,
+                supports_transfer_command: true,
+                supports_command_request: true,
+                supports_set_options_command: true,
+
+                is_voice_enabled: false,
+                restrict_to_local: false,
+                disable_volume: false,
+                connect_disabled: false,
+                supports_rename: false,
+                supports_external_episodes: false,
+                supports_set_backend_metadata: false,
+                supports_hifi: MessageField::none(),
+
+                command_acks: true,
+                ..Default::default()
+            }),
+            ..Default::default()
+        };
+
+        let mut state = Self {
+            request: PutStateRequest {
+                member_type: EnumOrUnknown::new(MemberType::CONNECT_STATE),
+                put_state_reason: EnumOrUnknown::new(PutStateReason::PLAYER_STATE_CHANGED),
+                device: MessageField::some(Device {
+                    device_info: MessageField::some(device_info),
+                    player_state: MessageField::some(PlayerState {
+                        session_id: cfg.session_id,
+                        ..Default::default()
+                    }),
+                    ..Default::default()
+                }),
+                ..Default::default()
+            },
+            ..Default::default()
+        };
+        state.reset();
+        state
+    }
+
+    fn reset(&mut self) {
+        self.set_active(false);
+        self.queue_count = 0;
+
+        // preserve the session_id
+        let session_id = self.player().session_id.clone();
+
+        self.device_mut().player_state = MessageField::some(PlayerState {
+            session_id,
+            is_system_initiated: true,
+            playback_speed: 1.,
+            play_origin: MessageField::some(PlayOrigin::new()),
+            suppressions: MessageField::some(Suppressions::new()),
+            options: MessageField::some(ContextPlayerOptions::new()),
+            // + 1, so that we have a buffer where we can swap elements
+            prev_tracks: Vec::with_capacity(SPOTIFY_MAX_PREV_TRACKS_SIZE + 1),
+            next_tracks: Vec::with_capacity(SPOTIFY_MAX_NEXT_TRACKS_SIZE + 1),
+            ..Default::default()
+        });
+    }
+
+    fn device_mut(&mut self) -> &mut Device {
+        self.request
+            .device
+            .as_mut()
+            .expect("the request is always available")
+    }
+
+    fn player_mut(&mut self) -> &mut PlayerState {
+        self.device_mut()
+            .player_state
+            .as_mut()
+            .expect("the player_state has to be always given")
+    }
+
+    pub fn device_info(&self) -> &DeviceInfo {
+        &self.request.device.device_info
+    }
+
+    pub fn player(&self) -> &PlayerState {
+        &self.request.device.player_state
+    }
+
+    pub fn is_active(&self) -> bool {
+        self.request.is_active
+    }
+
+    pub fn set_volume(&mut self, volume: u32) {
+        self.device_mut()
+            .device_info
+            .as_mut()
+            .expect("the device_info has to be always given")
+            .volume = volume;
+    }
+
+    pub fn set_last_command(&mut self, command: Request) {
+        self.request.last_command_message_id = command.message_id;
+        self.request.last_command_sent_by_device_id = command.sent_by_device_id;
+    }
+
+    pub fn set_now(&mut self, now: u64) {
+        self.request.client_side_timestamp = now;
+
+        if let Some(active_since) = self.active_since {
+            if let Ok(active_since_duration) = active_since.duration_since(UNIX_EPOCH) {
+                match active_since_duration.as_millis().try_into() {
+                    Ok(active_since_ms) => self.request.started_playing_at = active_since_ms,
+                    Err(why) => warn!("couldn't update active since because {why}"),
+                }
+            }
+        }
+    }
+
+    pub fn set_active(&mut self, value: bool) {
+        if value {
+            if self.request.is_active {
+                return;
+            }
+
+            self.request.is_active = true;
+            self.active_since = Some(SystemTime::now())
+        } else {
+            self.request.is_active = false;
+            self.active_since = None
+        }
+    }
+
+    pub fn set_origin(&mut self, origin: PlayOrigin) {
+        self.player_mut().play_origin = MessageField::some(origin)
+    }
+
+    pub fn set_session_id(&mut self, session_id: String) {
+        self.player_mut().session_id = session_id;
+    }
+
+    pub(crate) fn set_status(&mut self, status: &SpircPlayStatus) {
+        let player = self.player_mut();
+        player.is_paused = matches!(
+            status,
+            SpircPlayStatus::LoadingPause { .. }
+                | SpircPlayStatus::Paused { .. }
+                | SpircPlayStatus::Stopped
+        );
+
+        // desktop and mobile require all 'states' set to true, when we are paused,
+        // otherwise the play button (desktop) is grayed out or the preview (mobile) can't be opened
+        player.is_buffering = player.is_paused
+            || matches!(
+                status,
+                SpircPlayStatus::LoadingPause { .. } | SpircPlayStatus::LoadingPlay { .. }
+            );
+        player.is_playing = player.is_paused
+            || matches!(
+                status,
+                SpircPlayStatus::LoadingPlay { .. } | SpircPlayStatus::Playing { .. }
+            );
+
+        debug!(
+            "updated connect play status playing: {}, paused: {}, buffering: {}",
+            player.is_playing, player.is_paused, player.is_buffering
+        );
+
+        self.update_restrictions()
+    }
+
+    /// index is 0 based, so the first track is index 0
+    pub fn update_current_index(&mut self, f: impl Fn(&mut ContextIndex)) {
+        match self.player_mut().index.as_mut() {
+            Some(player_index) => f(player_index),
+            None => {
+                let mut new_index = ContextIndex::new();
+                f(&mut new_index);
+                self.player_mut().index = MessageField::some(new_index)
+            }
+        }
+    }
+
+    pub fn update_position(&mut self, position_ms: u32, timestamp: i64) {
+        let player = self.player_mut();
+        player.position_as_of_timestamp = position_ms.into();
+        player.timestamp = timestamp;
+    }
+
+    pub fn update_duration(&mut self, duration: u32) {
+        self.player_mut().duration = duration.into()
+    }
+
+    pub fn update_queue_revision(&mut self) {
+        let mut state = DefaultHasher::new();
+        self.next_tracks()
+            .iter()
+            .for_each(|t| t.uri.hash(&mut state));
+        self.player_mut().queue_revision = state.finish().to_string()
+    }
+
+    pub fn reset_playback_to_position(&mut self, new_index: Option<usize>) -> Result<(), Error> {
+        let new_index = new_index.unwrap_or(0);
+        self.update_current_index(|i| i.track = new_index as u32);
+        self.update_context_index(self.active_context, new_index + 1)?;
+
+        if !self.current_track(|t| t.is_queue()) {
+            self.set_current_track(new_index)?;
+        }
+
+        self.clear_prev_track();
+
+        if new_index > 0 {
+            let context = self.get_context(&self.active_context)?;
+
+            let before_new_track = context.tracks.len() - new_index;
+            self.player_mut().prev_tracks = context
+                .tracks
+                .iter()
+                .rev()
+                .skip(before_new_track)
+                .take(SPOTIFY_MAX_PREV_TRACKS_SIZE)
+                .rev()
+                .cloned()
+                .collect();
+            debug!("has {} prev tracks", self.prev_tracks().len())
+        }
+
+        self.clear_next_tracks(true);
+        self.fill_up_next_tracks()?;
+        self.update_restrictions();
+
+        Ok(())
+    }
+
+    fn mark_as_unavailable_for_match(track: &mut ProvidedTrack, uri: &str) {
+        if track.uri == uri {
+            debug!("Marked <{}:{}> as unavailable", track.provider, track.uri);
+            track.set_provider(Provider::Unavailable);
+        }
+    }
+
+    pub fn update_position_in_relation(&mut self, timestamp: i64) {
+        let player = self.player_mut();
+
+        let diff = timestamp - player.timestamp;
+        player.position_as_of_timestamp += diff;
+
+        if log::max_level() >= LevelFilter::Debug {
+            let pos = Duration::from_millis(player.position_as_of_timestamp as u64);
+            let time = Date::from_timestamp_ms(timestamp)
+                .map(|d| d.time().to_string())
+                .unwrap_or_else(|_| timestamp.to_string());
+
+            let sec = pos.as_secs();
+            let (min, sec) = (sec / 60, sec % 60);
+            debug!("update position to {min}:{sec:0>2} at {time}");
+        }
+
+        player.timestamp = timestamp;
+    }
+
+    pub async fn became_inactive(&mut self, session: &Session) -> SpClientResult {
+        self.reset();
+        self.reset_context(ResetContext::Completely);
+
+        session.spclient().put_connect_state_inactive(false).await
+    }
+
+    async fn send_with_reason(
+        &mut self,
+        session: &Session,
+        reason: PutStateReason,
+    ) -> SpClientResult {
+        let prev_reason = self.request.put_state_reason;
+
+        self.request.put_state_reason = EnumOrUnknown::new(reason);
+        let res = self.send_state(session).await;
+
+        self.request.put_state_reason = prev_reason;
+        res
+    }
+
+    /// Notifies the remote server about a new device
+    pub async fn notify_new_device_appeared(&mut self, session: &Session) -> SpClientResult {
+        self.send_with_reason(session, PutStateReason::NEW_DEVICE)
+            .await
+    }
+
+    /// Notifies the remote server about a new volume
+    pub async fn notify_volume_changed(&mut self, session: &Session) -> SpClientResult {
+        self.send_with_reason(session, PutStateReason::VOLUME_CHANGED)
+            .await
+    }
+
+    /// Sends the connect state for the connect session to the remote server
+    pub async fn send_state(&self, session: &Session) -> SpClientResult {
+        session
+            .spclient()
+            .put_connect_state_request(&self.request)
+            .await
+    }
+}

connect/src/state/context.rs

@@ -0,0 +1,415 @@
+use crate::state::{metadata::Metadata, provider::Provider, ConnectState, StateError};
+use librespot_core::{Error, SpotifyId};
+use librespot_protocol::player::{
+    Context, ContextIndex, ContextPage, ContextTrack, ProvidedTrack, Restrictions,
+};
+use protobuf::MessageField;
+use std::collections::HashMap;
+use uuid::Uuid;
+
+const LOCAL_FILES_IDENTIFIER: &str = "spotify:local-files";
+const SEARCH_IDENTIFIER: &str = "spotify:search";
+
+#[derive(Debug, Clone)]
+pub struct StateContext {
+    pub tracks: Vec<ProvidedTrack>,
+    pub metadata: HashMap<String, String>,
+    pub restrictions: Option<Restrictions>,
+    /// is used to keep track which tracks are already loaded into the next_tracks
+    pub index: ContextIndex,
+}
+
+#[derive(Default, Debug, Copy, Clone)]
+pub enum ContextType {
+    #[default]
+    Default,
+    Shuffle,
+    Autoplay,
+}
+
+pub enum LoadNext {
+    Done,
+    PageUrl(String),
+    Empty,
+}
+
+#[derive(Debug)]
+pub enum UpdateContext {
+    Default,
+    Autoplay,
+}
+
+pub enum ResetContext<'s> {
+    Completely,
+    DefaultIndex,
+    WhenDifferent(&'s str),
+}
+
+impl ConnectState {
+    pub fn find_index_in_context<F: Fn(&ProvidedTrack) -> bool>(
+        context: Option<&StateContext>,
+        f: F,
+    ) -> Result<usize, StateError> {
+        let ctx = context
+            .as_ref()
+            .ok_or(StateError::NoContext(ContextType::Default))?;
+
+        ctx.tracks
+            .iter()
+            .position(f)
+            .ok_or(StateError::CanNotFindTrackInContext(None, ctx.tracks.len()))
+    }
+
+    pub(super) fn get_context(&self, ty: &ContextType) -> Result<&StateContext, StateError> {
+        match ty {
+            ContextType::Default => self.context.as_ref(),
+            ContextType::Shuffle => self.shuffle_context.as_ref(),
+            ContextType::Autoplay => self.autoplay_context.as_ref(),
+        }
+        .ok_or(StateError::NoContext(*ty))
+    }
+
+    pub fn context_uri(&self) -> &String {
+        &self.player().context_uri
+    }
+
+    pub fn reset_context(&mut self, mut reset_as: ResetContext) {
+        self.set_active_context(ContextType::Default);
+        self.fill_up_context = ContextType::Default;
+
+        if matches!(reset_as, ResetContext::WhenDifferent(ctx) if self.context_uri() != ctx) {
+            reset_as = ResetContext::Completely
+        }
+        self.shuffle_context = None;
+
+        match reset_as {
+            ResetContext::Completely => {
+                self.context = None;
+                self.autoplay_context = None;
+                self.next_contexts.clear();
+            }
+            ResetContext::WhenDifferent(_) => debug!("context didn't change, no reset"),
+            ResetContext::DefaultIndex => {
+                for ctx in [self.context.as_mut(), self.autoplay_context.as_mut()]
+                    .into_iter()
+                    .flatten()
+                {
+                    ctx.index.track = 0;
+                    ctx.index.page = 0;
+                }
+            }
+        }
+
+        self.update_restrictions()
+    }
+
+    pub fn get_context_uri_from_context(context: &Context) -> Option<&String> {
+        if !context.uri.starts_with(SEARCH_IDENTIFIER) {
+            return Some(&context.uri);
+        }
+
+        context
+            .pages
+            .first()
+            .and_then(|p| p.tracks.first().map(|t| &t.uri))
+    }
+
+    pub fn set_active_context(&mut self, new_context: ContextType) {
+        self.active_context = new_context;
+
+        let ctx = match self.get_context(&new_context) {
+            Err(why) => {
+                debug!("couldn't load context info because: {why}");
+                return;
+            }
+            Ok(ctx) => ctx,
+        };
+
+        let mut restrictions = ctx.restrictions.clone();
+        let metadata = ctx.metadata.clone();
+
+        let player = self.player_mut();
+
+        player.context_metadata.clear();
+        player.restrictions.clear();
+
+        if let Some(restrictions) = restrictions.take() {
+            player.restrictions = MessageField::some(restrictions);
+        }
+
+        for (key, value) in metadata {
+            player.context_metadata.insert(key, value);
+        }
+    }
+
+    pub fn update_context(&mut self, mut context: Context, ty: UpdateContext) -> Result<(), Error> {
+        if context.pages.iter().all(|p| p.tracks.is_empty()) {
+            error!("context didn't have any tracks: {context:#?}");
+            return Err(StateError::ContextHasNoTracks.into());
+        } else if context.uri.starts_with(LOCAL_FILES_IDENTIFIER) {
+            return Err(StateError::UnsupportedLocalPlayBack.into());
+        }
+
+        if matches!(ty, UpdateContext::Default) {
+            self.next_contexts.clear();
+        }
+
+        let mut first_page = None;
+        for page in context.pages {
+            if first_page.is_none() && !page.tracks.is_empty() {
+                first_page = Some(page);
+            } else {
+                self.next_contexts.push(page)
+            }
+        }
+
+        let page = match first_page {
+            None => Err(StateError::ContextHasNoTracks)?,
+            Some(p) => p,
+        };
+
+        let prev_context = match ty {
+            UpdateContext::Default => self.context.as_ref(),
+            UpdateContext::Autoplay => self.autoplay_context.as_ref(),
+        };
+
+        debug!(
+            "updated context {ty:?} from <{}> ({} tracks) to <{}> ({} tracks)",
+            self.context_uri(),
+            prev_context
+                .map(|c| c.tracks.len().to_string())
+                .unwrap_or_else(|| "-".to_string()),
+            context.uri,
+            page.tracks.len()
+        );
+
+        match ty {
+            UpdateContext::Default => {
+                let mut new_context = self.state_context_from_page(
+                    page,
+                    context.restrictions.take(),
+                    Some(&context.uri),
+                    None,
+                );
+
+                // when we update the same context, we should try to preserve the previous position
+                // otherwise we might load the entire context twice
+                if !self.context_uri().contains(SEARCH_IDENTIFIER)
+                    && self.context_uri() == &context.uri
+                {
+                    match Self::find_index_in_context(Some(&new_context), |t| {
+                        self.current_track(|t| &t.uri) == &t.uri
+                    }) {
+                        Ok(new_pos) => {
+                            debug!("found new index of current track, updating new_context index to {new_pos}");
+                            new_context.index.track = (new_pos + 1) as u32;
+                        }
+                        // the track isn't anymore in the context
+                        Err(_) if matches!(self.active_context, ContextType::Default) => {
+                            warn!("current track was removed, setting pos to last known index");
+                            new_context.index.track = self.player().index.track
+                        }
+                        Err(_) => {}
+                    }
+                    // enforce reloading the context
+                    self.clear_next_tracks(true);
+                }
+
+                self.context = Some(new_context);
+
+                if !context.url.contains(SEARCH_IDENTIFIER) {
+                    self.player_mut().context_url = context.url;
+                } else {
+                    self.player_mut().context_url.clear()
+                }
+                self.player_mut().context_uri = context.uri;
+            }
+            UpdateContext::Autoplay => {
+                self.autoplay_context = Some(self.state_context_from_page(
+                    page,
+                    context.restrictions.take(),
+                    Some(&context.uri),
+                    Some(Provider::Autoplay),
+                ))
+            }
+        }
+
+        Ok(())
+    }
+
+    fn state_context_from_page(
+        &mut self,
+        page: ContextPage,
+        restrictions: Option<Restrictions>,
+        new_context_uri: Option<&str>,
+        provider: Option<Provider>,
+    ) -> StateContext {
+        let new_context_uri = new_context_uri.unwrap_or(self.context_uri());
+
+        let tracks = page
+            .tracks
+            .iter()
+            .flat_map(|track| {
+                match self.context_to_provided_track(track, Some(new_context_uri), provider.clone())
+                {
+                    Ok(t) => Some(t),
+                    Err(why) => {
+                        error!("couldn't convert {track:#?} into ProvidedTrack: {why}");
+                        None
+                    }
+                }
+            })
+            .collect::<Vec<_>>();
+
+        StateContext {
+            tracks,
+            restrictions,
+            metadata: page.metadata,
+            index: ContextIndex::new(),
+        }
+    }
+
+    pub fn merge_context(&mut self, context: Option<Context>) -> Option<()> {
+        let mut context = context?;
+        if self.context_uri() != &context.uri {
+            return None;
+        }
+
+        let current_context = self.context.as_mut()?;
+        let new_page = context.pages.pop()?;
+
+        for new_track in new_page.tracks {
+            if new_track.uri.is_empty() {
+                continue;
+            }
+
+            if let Ok(position) =
+                Self::find_index_in_context(Some(current_context), |t| t.uri == new_track.uri)
+            {
+                let context_track = current_context.tracks.get_mut(position)?;
+
+                for (key, value) in new_track.metadata {
+                    warn!("merging metadata {key} {value}");
+                    context_track.metadata.insert(key, value);
+                }
+
+                // the uid provided from another context might be actual uid of an item
+                if !new_track.uid.is_empty() {
+                    context_track.uid = new_track.uid;
+                }
+            }
+        }
+
+        Some(())
+    }
+
+    pub(super) fn update_context_index(
+        &mut self,
+        ty: ContextType,
+        new_index: usize,
+    ) -> Result<(), StateError> {
+        let context = match ty {
+            ContextType::Default => self.context.as_mut(),
+            ContextType::Shuffle => self.shuffle_context.as_mut(),
+            ContextType::Autoplay => self.autoplay_context.as_mut(),
+        }
+        .ok_or(StateError::NoContext(ty))?;
+
+        context.index.track = new_index as u32;
+        Ok(())
+    }
+
+    pub fn context_to_provided_track(
+        &self,
+        ctx_track: &ContextTrack,
+        context_uri: Option<&str>,
+        provider: Option<Provider>,
+    ) -> Result<ProvidedTrack, Error> {
+        let id = if !ctx_track.uri.is_empty() {
+            if ctx_track.uri.contains(['?', '%']) {
+                Err(StateError::InvalidTrackUri(ctx_track.uri.clone()))?
+            }
+
+            SpotifyId::from_uri(&ctx_track.uri)?
+        } else if !ctx_track.gid.is_empty() {
+            SpotifyId::from_raw(&ctx_track.gid)?
+        } else {
+            Err(StateError::InvalidTrackUri(String::new()))?
+        };
+
+        let provider = if self.unavailable_uri.contains(&ctx_track.uri) {
+            Provider::Unavailable
+        } else {
+            provider.unwrap_or(Provider::Context)
+        };
+
+        // assumption: the uid is used as unique-id of any item
+        //  - queue resorting is done by each client and orients itself by the given uid
+        //  - if no uid is present, resorting doesn't work or behaves not as intended
+        let uid = if ctx_track.uid.is_empty() {
+            // so setting providing a unique id should allow to resort the queue
+            Uuid::new_v4().as_simple().to_string()
+        } else {
+            ctx_track.uid.to_string()
+        };
+
+        let mut metadata = HashMap::new();
+        for (k, v) in &ctx_track.metadata {
+            metadata.insert(k.to_string(), v.to_string());
+        }
+
+        let mut track = ProvidedTrack {
+            uri: id.to_uri()?.replace("unknown", "track"),
+            uid,
+            metadata,
+            provider: provider.to_string(),
+            ..Default::default()
+        };
+
+        if let Some(context_uri) = context_uri {
+            track.set_context_uri(context_uri.to_string());
+            track.set_entity_uri(context_uri.to_string());
+        }
+
+        if matches!(provider, Provider::Autoplay) {
+            track.set_autoplay(true)
+        }
+
+        Ok(track)
+    }
+
+    pub fn fill_context_from_page(&mut self, page: ContextPage) -> Result<(), Error> {
+        let context = self.state_context_from_page(page, None, None, None);
+        let ctx = self
+            .context
+            .as_mut()
+            .ok_or(StateError::NoContext(ContextType::Default))?;
+
+        for t in context.tracks {
+            ctx.tracks.push(t)
+        }
+
+        Ok(())
+    }
+
+    pub fn try_load_next_context(&mut self) -> Result<LoadNext, Error> {
+        let next = match self.next_contexts.first() {
+            None => return Ok(LoadNext::Empty),
+            Some(_) => self.next_contexts.remove(0),
+        };
+
+        if next.tracks.is_empty() {
+            if next.page_url.is_empty() {
+                Err(StateError::NoContext(ContextType::Default))?
+            }
+
+            self.update_current_index(|i| i.page += 1);
+            return Ok(LoadNext::PageUrl(next.page_url));
+        }
+
+        self.fill_context_from_page(next)?;
+        self.fill_up_next_tracks()?;
+
+        Ok(LoadNext::Done)
+    }
+}

connect/src/state/handle.rs

@@ -0,0 +1,65 @@
+use crate::state::{context::ResetContext, ConnectState};
+use librespot_core::{dealer::protocol::SetQueueCommand, Error};
+use protobuf::MessageField;
+
+impl ConnectState {
+    pub fn handle_shuffle(&mut self, shuffle: bool) -> Result<(), Error> {
+        self.set_shuffle(shuffle);
+
+        if shuffle {
+            return self.shuffle();
+        }
+
+        self.reset_context(ResetContext::DefaultIndex);
+
+        if self.current_track(MessageField::is_none) {
+            return Ok(());
+        }
+
+        let ctx = self.context.as_ref();
+        let current_index =
+            ConnectState::find_index_in_context(ctx, |c| self.current_track(|t| c.uri == t.uri))?;
+
+        self.reset_playback_to_position(Some(current_index))
+    }
+
+    pub fn handle_set_queue(&mut self, set_queue: SetQueueCommand) {
+        self.set_next_tracks(set_queue.next_tracks);
+        self.set_prev_tracks(set_queue.prev_tracks);
+        self.update_queue_revision();
+    }
+
+    pub fn handle_set_repeat(
+        &mut self,
+        context: Option<bool>,
+        track: Option<bool>,
+    ) -> Result<(), Error> {
+        // doesn't need any state updates, because it should only change how the current song is played
+        if let Some(track) = track {
+            self.set_repeat_track(track);
+        }
+
+        if matches!(context, Some(context) if self.repeat_context() == context) || context.is_none()
+        {
+            return Ok(());
+        }
+
+        if let Some(context) = context {
+            self.set_repeat_context(context);
+        }
+
+        if self.repeat_context() {
+            self.set_shuffle(false);
+            self.reset_context(ResetContext::DefaultIndex);
+
+            let ctx = self.context.as_ref();
+            let current_track = ConnectState::find_index_in_context(ctx, |t| {
+                self.current_track(|t| &t.uri) == &t.uri
+            })?;
+            self.reset_playback_to_position(Some(current_track))
+        } else {
+            self.update_restrictions();
+            Ok(())
+        }
+    }
+}

connect/src/state/metadata.rs

@@ -0,0 +1,84 @@
+use librespot_protocol::player::{ContextTrack, ProvidedTrack};
+use std::collections::HashMap;
+
+const CONTEXT_URI: &str = "context_uri";
+const ENTITY_URI: &str = "entity_uri";
+const IS_QUEUED: &str = "is_queued";
+const IS_AUTOPLAY: &str = "autoplay.is_autoplay";
+
+const HIDDEN: &str = "hidden";
+const ITERATION: &str = "iteration";
+
+#[allow(dead_code)]
+pub trait Metadata {
+    fn metadata(&self) -> &HashMap<String, String>;
+    fn metadata_mut(&mut self) -> &mut HashMap<String, String>;
+
+    fn is_from_queue(&self) -> bool {
+        matches!(self.metadata().get(IS_QUEUED), Some(is_queued) if is_queued.eq("true"))
+    }
+
+    fn is_from_autoplay(&self) -> bool {
+        matches!(self.metadata().get(IS_AUTOPLAY), Some(is_autoplay) if is_autoplay.eq("true"))
+    }
+
+    fn is_hidden(&self) -> bool {
+        matches!(self.metadata().get(HIDDEN), Some(is_hidden) if is_hidden.eq("true"))
+    }
+
+    fn get_context_uri(&self) -> Option<&String> {
+        self.metadata().get(CONTEXT_URI)
+    }
+
+    fn get_iteration(&self) -> Option<&String> {
+        self.metadata().get(ITERATION)
+    }
+
+    fn set_queued(&mut self, queued: bool) {
+        self.metadata_mut()
+            .insert(IS_QUEUED.to_string(), queued.to_string());
+    }
+
+    fn set_autoplay(&mut self, autoplay: bool) {
+        self.metadata_mut()
+            .insert(IS_AUTOPLAY.to_string(), autoplay.to_string());
+    }
+
+    fn set_hidden(&mut self, hidden: bool) {
+        self.metadata_mut()
+            .insert(HIDDEN.to_string(), hidden.to_string());
+    }
+
+    fn set_context_uri(&mut self, uri: String) {
+        self.metadata_mut().insert(CONTEXT_URI.to_string(), uri);
+    }
+
+    fn set_entity_uri(&mut self, uri: String) {
+        self.metadata_mut().insert(ENTITY_URI.to_string(), uri);
+    }
+
+    fn add_iteration(&mut self, iter: i64) {
+        self.metadata_mut()
+            .insert(ITERATION.to_string(), iter.to_string());
+    }
+}
+
+impl Metadata for ContextTrack {
+    fn metadata(&self) -> &HashMap<String, String> {
+        &self.metadata
+    }
+
+    fn metadata_mut(&mut self) -> &mut HashMap<String, String> {
+        &mut self.metadata
+    }
+}
+
+impl Metadata for ProvidedTrack {
+    fn metadata(&self) -> &HashMap<String, String> {
+        &self.metadata
+    }
+
+    fn metadata_mut(&mut self) -> &mut HashMap<String, String> {
+        &mut self.metadata
+    }
+}

connect/src/state/options.rs

@@ -0,0 +1,88 @@
+use crate::state::context::ContextType;
+use crate::state::{ConnectState, StateError};
+use librespot_core::Error;
+use librespot_protocol::player::{ContextIndex, ContextPlayerOptions};
+use protobuf::MessageField;
+use rand::prelude::SliceRandom;
+
+impl ConnectState {
+    fn add_options_if_empty(&mut self) {
+        if self.player().options.is_none() {
+            self.player_mut().options = MessageField::some(ContextPlayerOptions::new())
+        }
+    }
+
+    pub fn set_repeat_context(&mut self, repeat: bool) {
+        self.add_options_if_empty();
+        if let Some(options) = self.player_mut().options.as_mut() {
+            options.repeating_context = repeat;
+        }
+    }
+
+    pub fn set_repeat_track(&mut self, repeat: bool) {
+        self.add_options_if_empty();
+        if let Some(options) = self.player_mut().options.as_mut() {
+            options.repeating_track = repeat;
+        }
+    }
+
+    pub fn set_shuffle(&mut self, shuffle: bool) {
+        self.add_options_if_empty();
+        if let Some(options) = self.player_mut().options.as_mut() {
+            options.shuffling_context = shuffle;
+        }
+    }
+
+    pub fn shuffle(&mut self) -> Result<(), Error> {
+        if let Some(reason) = self
+            .player()
+            .restrictions
+            .disallow_toggling_shuffle_reasons
+            .first()
+        {
+            Err(StateError::CurrentlyDisallowed {
+                action: "shuffle".to_string(),
+                reason: reason.clone(),
+            })?
+        }
+
+        self.clear_prev_track();
+        self.clear_next_tracks(true);
+
+        let current_uri = self.current_track(|t| &t.uri);
+
+        let ctx = self
+            .context
+            .as_ref()
+            .ok_or(StateError::NoContext(ContextType::Default))?;
+
+        let current_track = Self::find_index_in_context(Some(ctx), |t| &t.uri == current_uri)?;
+
+        let mut shuffle_context = ctx.clone();
+        // we don't need to include the current track, because it is already being played
+        shuffle_context.tracks.remove(current_track);
+
+        let mut rng = rand::thread_rng();
+        shuffle_context.tracks.shuffle(&mut rng);
+        shuffle_context.index = ContextIndex::new();
+
+        self.shuffle_context = Some(shuffle_context);
+        self.set_active_context(ContextType::Shuffle);
+        self.fill_up_context = ContextType::Shuffle;
+        self.fill_up_next_tracks()?;
+
+        Ok(())
+    }
+
+    pub fn shuffling_context(&self) -> bool {
+        self.player().options.shuffling_context
+    }
+
+    pub fn repeat_context(&self) -> bool {
+        self.player().options.repeating_context
+    }
+
+    pub fn repeat_track(&self) -> bool {
+        self.player().options.repeating_track
+    }
+}

connect/src/state/provider.rs

@@ -0,0 +1,66 @@
+use librespot_protocol::player::ProvidedTrack;
+use std::fmt::{Display, Formatter};
+
+// providers used by spotify
+const PROVIDER_CONTEXT: &str = "context";
+const PROVIDER_QUEUE: &str = "queue";
+const PROVIDER_AUTOPLAY: &str = "autoplay";
+
+// custom providers, used to identify certain states that we can't handle preemptively, yet
+/// it seems like spotify just knows that the track isn't available, currently we don't have an
+/// option to do the same, so we stay with the old solution for now
+const PROVIDER_UNAVAILABLE: &str = "unavailable";
+
+#[derive(Debug, Clone)]
+pub enum Provider {
+    Context,
+    Queue,
+    Autoplay,
+    Unavailable,
+}
+
+impl Display for Provider {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        write!(
+            f,
+            "{}",
+            match self {
+                Provider::Context => PROVIDER_CONTEXT,
+                Provider::Queue => PROVIDER_QUEUE,
+                Provider::Autoplay => PROVIDER_AUTOPLAY,
+                Provider::Unavailable => PROVIDER_UNAVAILABLE,
+            }
+        )
+    }
+}
+
+pub trait IsProvider {
+    fn is_autoplay(&self) -> bool;
+    fn is_context(&self) -> bool;
+    fn is_queue(&self) -> bool;
+    fn is_unavailable(&self) -> bool;
+
+    fn set_provider(&mut self, provider: Provider);
+}
+
+impl IsProvider for ProvidedTrack {
+    fn is_autoplay(&self) -> bool {
+        self.provider == PROVIDER_AUTOPLAY
+    }
+
+    fn is_context(&self) -> bool {
+        self.provider == PROVIDER_CONTEXT
+    }
+
+    fn is_queue(&self) -> bool {
+        self.provider == PROVIDER_QUEUE
+    }
+
+    fn is_unavailable(&self) -> bool {
+        self.provider == PROVIDER_UNAVAILABLE
+    }
+
+    fn set_provider(&mut self, provider: Provider) {
+        self.provider = provider.to_string()
+    }
+}

connect/src/state/restrictions.rs

@@ -0,0 +1,61 @@
+use crate::state::provider::IsProvider;
+use crate::state::ConnectState;
+use librespot_protocol::player::Restrictions;
+use protobuf::MessageField;
+
+impl ConnectState {
+    pub fn clear_restrictions(&mut self) {
+        let player = self.player_mut();
+
+        player.restrictions.clear();
+        player.context_restrictions.clear();
+    }
+
+    pub fn update_restrictions(&mut self) {
+        const NO_PREV: &str = "no previous tracks";
+        const AUTOPLAY: &str = "autoplay";
+        const ENDLESS_CONTEXT: &str = "endless_context";
+
+        let prev_tracks_is_empty = self.prev_tracks().is_empty();
+        let player = self.player_mut();
+        if let Some(restrictions) = player.restrictions.as_mut() {
+            if player.is_playing {
+                restrictions.disallow_pausing_reasons.clear();
+                restrictions.disallow_resuming_reasons = vec!["not_paused".to_string()]
+            }
+
+            if player.is_paused {
+                restrictions.disallow_resuming_reasons.clear();
+                restrictions.disallow_pausing_reasons = vec!["not_playing".to_string()]
+            }
+        }
+
+        if player.restrictions.is_none() {
+            player.restrictions = MessageField::some(Restrictions::new())
+        }
+
+        if let Some(restrictions) = player.restrictions.as_mut() {
+            if prev_tracks_is_empty {
+                restrictions.disallow_peeking_prev_reasons = vec![NO_PREV.to_string()];
+                restrictions.disallow_skipping_prev_reasons = vec![NO_PREV.to_string()];
+            } else {
+                restrictions.disallow_peeking_prev_reasons.clear();
+                restrictions.disallow_skipping_prev_reasons.clear();
+            }
+
+            if player.track.is_autoplay() {
+                restrictions.disallow_toggling_shuffle_reasons = vec![AUTOPLAY.to_string()];
+                restrictions.disallow_toggling_repeat_context_reasons = vec![AUTOPLAY.to_string()];
+                restrictions.disallow_toggling_repeat_track_reasons = vec![AUTOPLAY.to_string()];
+            } else if player.options.repeating_context {
+                restrictions.disallow_toggling_shuffle_reasons = vec![ENDLESS_CONTEXT.to_string()]
+            } else {
+                restrictions.disallow_toggling_shuffle_reasons.clear();
+                restrictions
+                    .disallow_toggling_repeat_context_reasons
+                    .clear();
+                restrictions.disallow_toggling_repeat_track_reasons.clear();
+            }
+        }
+    }
+}

connect/src/state/tracks.rs

@@ -0,0 +1,422 @@
+use crate::state::{
+    context::ContextType,
+    metadata::Metadata,
+    provider::{IsProvider, Provider},
+    ConnectState, StateError, SPOTIFY_MAX_NEXT_TRACKS_SIZE, SPOTIFY_MAX_PREV_TRACKS_SIZE,
+};
+use librespot_core::{Error, SpotifyId};
+use librespot_protocol::player::ProvidedTrack;
+use protobuf::MessageField;
+
+// identifier used as part of the uid
+pub const IDENTIFIER_DELIMITER: &str = "delimiter";
+
+impl<'ct> ConnectState {
+    fn new_delimiter(iteration: i64) -> ProvidedTrack {
+        let mut delimiter = ProvidedTrack {
+            uri: format!("spotify:{IDENTIFIER_DELIMITER}"),
+            uid: format!("{IDENTIFIER_DELIMITER}{iteration}"),
+            provider: Provider::Context.to_string(),
+            ..Default::default()
+        };
+        delimiter.set_hidden(true);
+        delimiter.add_iteration(iteration);
+
+        delimiter
+    }
+
+    fn push_prev(&mut self, prev: ProvidedTrack) {
+        let prev_tracks = self.prev_tracks_mut();
+        // add prev track, while preserving a length of 10
+        if prev_tracks.len() >= SPOTIFY_MAX_PREV_TRACKS_SIZE {
+            // todo: O(n), but technically only maximal O(SPOTIFY_MAX_PREV_TRACKS_SIZE) aka O(10)
+            let _ = prev_tracks.remove(0);
+        }
+        prev_tracks.push(prev)
+    }
+
+    fn get_next_track(&mut self) -> Option<ProvidedTrack> {
+        if self.next_tracks().is_empty() {
+            None
+        } else {
+            // todo: O(n), but technically only maximal O(SPOTIFY_MAX_NEXT_TRACKS_SIZE) aka O(80)
+            Some(self.next_tracks_mut().remove(0))
+        }
+    }
+
+    /// bottom => top, aka the last track of the list is the prev track
+    fn prev_tracks_mut(&mut self) -> &mut Vec<ProvidedTrack> {
+        &mut self.player_mut().prev_tracks
+    }
+
+    /// bottom => top, aka the last track of the list is the prev track
+    pub(super) fn prev_tracks(&self) -> &Vec<ProvidedTrack> {
+        &self.player().prev_tracks
+    }
+
+    /// top => bottom, aka the first track of the list is the next track
+    fn next_tracks_mut(&mut self) -> &mut Vec<ProvidedTrack> {
+        &mut self.player_mut().next_tracks
+    }
+
+    /// top => bottom, aka the first track of the list is the next track
+    pub(super) fn next_tracks(&self) -> &Vec<ProvidedTrack> {
+        &self.player().next_tracks
+    }
+
+    pub fn set_current_track(&mut self, index: usize) -> Result<(), Error> {
+        let context = self.get_context(&self.active_context)?;
+
+        let new_track = context
+            .tracks
+            .get(index)
+            .ok_or(StateError::CanNotFindTrackInContext(
+                Some(index),
+                context.tracks.len(),
+            ))?;
+
+        debug!(
+            "set track to: {} at {} of {} tracks",
+            index,
+            new_track.uri,
+            context.tracks.len()
+        );
+
+        self.set_track(new_track.clone());
+
+        self.update_current_index(|i| i.track = index as u32);
+
+        Ok(())
+    }
+
+    /// Move to the next track
+    ///
+    /// Updates the current track to the next track. Adds the old track
+    /// to prev tracks and fills up the next tracks from the current context
+    pub fn next_track(&mut self) -> Result<Option<u32>, Error> {
+        // when we skip in repeat track, we don't repeat the current track anymore
+        if self.repeat_track() {
+            self.set_repeat_track(false);
+        }
+
+        let old_track = self.player_mut().track.take();
+
+        if let Some(old_track) = old_track {
+            // only add songs from our context to our previous tracks
+            if old_track.is_context() || old_track.is_autoplay() {
+                self.push_prev(old_track)
+            }
+        }
+
+        let new_track = loop {
+            match self.get_next_track() {
+                Some(next) if next.uid.starts_with(IDENTIFIER_DELIMITER) => {
+                    self.push_prev(next);
+                    continue;
+                }
+                Some(next) if next.is_unavailable() => continue,
+                other => break other,
+            };
+        };
+
+        let new_track = match new_track {
+            None => return Ok(None),
+            Some(t) => t,
+        };
+
+        self.fill_up_next_tracks()?;
+
+        let update_index = if new_track.is_queue() {
+            None
+        } else if new_track.is_autoplay() {
+            self.set_active_context(ContextType::Autoplay);
+            None
+        } else {
+            let ctx = self.context.as_ref();
+            let new_index = Self::find_index_in_context(ctx, |c| c.uri == new_track.uri);
+            match new_index {
+                Ok(new_index) => Some(new_index as u32),
+                Err(why) => {
+                    error!("didn't find the track in the current context: {why}");
+                    None
+                }
+            }
+        };
+
+        if let Some(update_index) = update_index {
+            self.update_current_index(|i| i.track = update_index)
+        } else {
+            self.player_mut().index.clear()
+        }
+
+        self.set_track(new_track);
+        self.update_restrictions();
+
+        Ok(Some(self.player().index.track))
+    }
+
+    /// Move to the prev track
+    ///
+    /// Updates the current track to the prev track. Adds the old track
+    /// to next tracks (when from the context) and fills up the prev tracks from the
+    /// current context
+    pub fn prev_track(&mut self) -> Result<Option<&MessageField<ProvidedTrack>>, Error> {
+        let old_track = self.player_mut().track.take();
+
+        if let Some(old_track) = old_track {
+            if old_track.is_context() || old_track.is_autoplay() {
+                // todo: O(n)
+                self.next_tracks_mut().insert(0, old_track);
+            }
+        }
+
+        // handle possible delimiter
+        if matches!(self.prev_tracks().last(), Some(prev) if prev.uid.starts_with(IDENTIFIER_DELIMITER))
+        {
+            let delimiter = self
+                .prev_tracks_mut()
+                .pop()
+                .expect("item that was prechecked");
+
+            let next_tracks = self.next_tracks_mut();
+            if next_tracks.len() >= SPOTIFY_MAX_NEXT_TRACKS_SIZE {
+                let _ = next_tracks.pop();
+            }
+            // todo: O(n)
+            next_tracks.insert(0, delimiter)
+        }
+
+        while self.next_tracks().len() > SPOTIFY_MAX_NEXT_TRACKS_SIZE {
+            let _ = self.next_tracks_mut().pop();
+        }
+
+        let new_track = match self.prev_tracks_mut().pop() {
+            None => return Ok(None),
+            Some(t) => t,
+        };
+
+        if matches!(self.active_context, ContextType::Autoplay if new_track.is_context()) {
+            // transition back to default context
+            self.set_active_context(ContextType::Default);
+        }
+
+        self.fill_up_next_tracks()?;
+        self.set_track(new_track);
+
+        if self.player().index.track == 0 {
+            warn!("prev: trying to skip into negative, index update skipped")
+        } else {
+            self.update_current_index(|i| i.track -= 1)
+        }
+
+        self.update_restrictions();
+
+        Ok(Some(self.current_track(|t| t)))
+    }
+
+    pub fn current_track<F: Fn(&'ct MessageField<ProvidedTrack>) -> R, R>(
+        &'ct self,
+        access: F,
+    ) -> R {
+        access(&self.player().track)
+    }
+
+    pub fn set_track(&mut self, track: ProvidedTrack) {
+        self.player_mut().track = MessageField::some(track)
+    }
+
+    pub fn set_next_tracks(&mut self, mut tracks: Vec<ProvidedTrack>) {
+        // mobile only sends a set_queue command instead of an add_to_queue command
+        // in addition to handling the mobile add_to_queue handling, this should also handle
+        // a mass queue addition
+        tracks
+            .iter_mut()
+            .filter(|t| t.is_from_queue())
+            .for_each(|t| {
+                t.set_provider(Provider::Queue);
+                // technically we could preserve the queue-uid here,
+                // but it seems to work without that, so we just override it
+                t.uid = format!("q{}", self.queue_count);
+                self.queue_count += 1;
+            });
+
+        self.player_mut().next_tracks = tracks;
+    }
+
+    pub fn set_prev_tracks(&mut self, tracks: Vec<ProvidedTrack>) {
+        self.player_mut().prev_tracks = tracks;
+    }
+
+    pub fn clear_prev_track(&mut self) {
+        self.prev_tracks_mut().clear()
+    }
+
+    pub fn clear_next_tracks(&mut self, keep_queued: bool) {
+        if !keep_queued {
+            self.next_tracks_mut().clear();
+            return;
+        }
+
+        // respect queued track and don't throw them out of our next played tracks
+        let first_non_queued_track = self
+            .next_tracks()
+            .iter()
+            .enumerate()
+            .find(|(_, track)| !track.is_queue());
+
+        if let Some((non_queued_track, _)) = first_non_queued_track {
+            while self.next_tracks().len() > non_queued_track
+                && self.next_tracks_mut().pop().is_some()
+            {}
+        }
+    }
+
+    pub fn fill_up_next_tracks(&mut self) -> Result<(), StateError> {
+        let ctx = self.get_context(&self.fill_up_context)?;
+        let mut new_index = ctx.index.track as usize;
+        let mut iteration = ctx.index.page;
+
+        while self.next_tracks().len() < SPOTIFY_MAX_NEXT_TRACKS_SIZE {
+            let ctx = self.get_context(&self.fill_up_context)?;
+            let track = match ctx.tracks.get(new_index) {
+                None if self.repeat_context() => {
+                    let delimiter = Self::new_delimiter(iteration.into());
+                    iteration += 1;
+                    new_index = 0;
+                    delimiter
+                }
+                None if !matches!(self.fill_up_context, ContextType::Autoplay)
+                    && self.autoplay_context.is_some() =>
+                {
+                    self.update_context_index(self.fill_up_context, new_index)?;
+
+                    // transition to autoplay as fill up context
+                    self.fill_up_context = ContextType::Autoplay;
+                    new_index = self.get_context(&ContextType::Autoplay)?.index.track as usize;
+
+                    // add delimiter to only display the current context
+                    Self::new_delimiter(iteration.into())
+                }
+                None if self.autoplay_context.is_some() => {
+                    match self
+                        .get_context(&ContextType::Autoplay)?
+                        .tracks
+                        .get(new_index)
+                    {
+                        None => break,
+                        Some(ct) => {
+                            new_index += 1;
+                            ct.clone()
+                        }
+                    }
+                }
+                None => break,
+                Some(ct) if ct.is_unavailable() => {
+                    new_index += 1;
+                    continue;
+                }
+                Some(ct) => {
+                    new_index += 1;
+                    ct.clone()
+                }
+            };
+
+            self.next_tracks_mut().push(track);
+        }
+
+        self.update_context_index(self.fill_up_context, new_index)?;
+
+        // the web-player needs a revision update, otherwise the queue isn't updated in the ui
+        self.update_queue_revision();
+
+        Ok(())
+    }
+
+    pub fn preview_next_track(&mut self) -> Option<SpotifyId> {
+        let next = if self.repeat_track() {
+            self.current_track(|t| &t.uri)
+        } else {
+            &self.next_tracks().first()?.uri
+        };
+
+        SpotifyId::from_uri(next).ok()
+    }
+
+    pub fn has_next_tracks(&self, min: Option<usize>) -> bool {
+        if let Some(min) = min {
+            self.next_tracks().len() >= min
+        } else {
+            !self.next_tracks().is_empty()
+        }
+    }
+
+    pub fn prev_autoplay_track_uris(&self) -> Vec<String> {
+        let mut prev = self
+            .prev_tracks()
+            .iter()
+            .flat_map(|t| t.is_autoplay().then_some(t.uri.clone()))
+            .collect::<Vec<_>>();
+
+        if self.current_track(|t| t.is_autoplay()) {
+            prev.push(self.current_track(|t| t.uri.clone()));
+        }
+
+        prev
+    }
+
+    pub fn mark_unavailable(&mut self, id: SpotifyId) -> Result<(), Error> {
+        let uri = id.to_uri()?;
+
+        debug!("marking {uri} as unavailable");
+
+        let next_tracks = self.next_tracks_mut();
+        while let Some(pos) = next_tracks.iter().position(|t| t.uri == uri) {
+            let _ = next_tracks.remove(pos);
+        }
+
+        for next_track in next_tracks {
+            Self::mark_as_unavailable_for_match(next_track, &uri)
+        }
+
+        let prev_tracks = self.prev_tracks_mut();
+        while let Some(pos) = prev_tracks.iter().position(|t| t.uri == uri) {
+            let _ = prev_tracks.remove(pos);
+        }
+
+        for prev_track in prev_tracks {
+            Self::mark_as_unavailable_for_match(prev_track, &uri)
+        }
+
+        self.unavailable_uri.push(uri);
+        self.fill_up_next_tracks()?;
+        self.update_queue_revision();
+
+        Ok(())
+    }
+
+    pub fn add_to_queue(&mut self, mut track: ProvidedTrack, rev_update: bool) {
+        track.uid = format!("q{}", self.queue_count);
+        self.queue_count += 1;
+
+        track.set_provider(Provider::Queue);
+        if !track.is_from_queue() {
+            track.set_queued(true);
+        }
+
+        let next_tracks = self.next_tracks_mut();
+        if let Some(next_not_queued_track) = next_tracks.iter().position(|t| !t.is_queue()) {
+            next_tracks.insert(next_not_queued_track, track);
+        } else {
+            next_tracks.push(track)
+        }
+
+        while next_tracks.len() > SPOTIFY_MAX_NEXT_TRACKS_SIZE {
+            next_tracks.pop();
+        }
+
+        if rev_update {
+            self.update_queue_revision();
+        }
+        self.update_restrictions();
+    }
+}

connect/src/state/transfer.rs

@@ -0,0 +1,146 @@
+use crate::state::context::ContextType;
+use crate::state::metadata::Metadata;
+use crate::state::provider::{IsProvider, Provider};
+use crate::state::{ConnectState, StateError};
+use librespot_core::Error;
+use librespot_protocol::player::{ProvidedTrack, TransferState};
+use protobuf::MessageField;
+
+impl ConnectState {
+    pub fn current_track_from_transfer(
+        &self,
+        transfer: &TransferState,
+    ) -> Result<ProvidedTrack, Error> {
+        let track = if transfer.queue.is_playing_queue {
+            transfer.queue.tracks.first()
+        } else {
+            transfer.playback.current_track.as_ref()
+        }
+        .ok_or(StateError::CouldNotResolveTrackFromTransfer)?;
+
+        self.context_to_provided_track(
+            track,
+            Some(&transfer.current_session.context.uri),
+            transfer.queue.is_playing_queue.then_some(Provider::Queue),
+        )
+    }
+
+    /// handles the initially transferable data
+    pub fn handle_initial_transfer(&mut self, transfer: &mut TransferState) {
+        let current_context_metadata = self.context.as_ref().map(|c| c.metadata.clone());
+        let player = self.player_mut();
+
+        player.is_buffering = false;
+
+        if let Some(options) = transfer.options.take() {
+            player.options = MessageField::some(options);
+        }
+        player.is_paused = transfer.playback.is_paused;
+        player.is_playing = !transfer.playback.is_paused;
+
+        if transfer.playback.playback_speed != 0. {
+            player.playback_speed = transfer.playback.playback_speed
+        } else {
+            player.playback_speed = 1.;
+        }
+
+        if let Some(session) = transfer.current_session.as_mut() {
+            player.play_origin = session.play_origin.take().into();
+            player.suppressions = session.suppressions.take().into();
+
+            if let Some(mut ctx) = session.context.take() {
+                player.restrictions = ctx.restrictions.take().into();
+                for (key, value) in ctx.metadata {
+                    player.context_metadata.insert(key, value);
+                }
+            }
+        }
+
+        player.context_url.clear();
+        player.context_uri.clear();
+
+        if let Some(metadata) = current_context_metadata {
+            for (key, value) in metadata {
+                player.context_metadata.insert(key, value);
+            }
+        }
+
+        self.clear_prev_track();
+        self.clear_next_tracks(false);
+    }
+
+    /// completes the transfer, loading the queue and updating metadata
+    pub fn finish_transfer(&mut self, transfer: TransferState) -> Result<(), Error> {
+        let track = match self.player().track.as_ref() {
+            None => self.current_track_from_transfer(&transfer)?,
+            Some(track) => track.clone(),
+        };
+
+        let context_ty = if self.current_track(|t| t.is_from_autoplay()) {
+            ContextType::Autoplay
+        } else {
+            ContextType::Default
+        };
+
+        self.set_active_context(context_ty);
+        self.fill_up_context = context_ty;
+
+        let ctx = self.get_context(&self.active_context).ok();
+
+        let current_index = if track.is_queue() {
+            Self::find_index_in_context(ctx, |c| c.uid == transfer.current_session.current_uid)
+                .map(|i| if i > 0 { i - 1 } else { i })
+        } else {
+            Self::find_index_in_context(ctx, |c| c.uri == track.uri || c.uid == track.uid)
+        };
+
+        debug!(
+            "active track is <{}> with index {current_index:?} in {:?} context, has {} tracks",
+            track.uri,
+            self.active_context,
+            ctx.map(|c| c.tracks.len()).unwrap_or_default()
+        );
+
+        if self.player().track.is_none() {
+            self.set_track(track);
+        }
+
+        let current_index = current_index.ok();
+        if let Some(current_index) = current_index {
+            self.update_current_index(|i| i.track = current_index as u32);
+        }
+
+        debug!(
+            "setting up next and prev: index is at {current_index:?} while shuffle {}",
+            self.shuffling_context()
+        );
+
+        for (i, track) in transfer.queue.tracks.iter().enumerate() {
+            if transfer.queue.is_playing_queue && i == 0 {
+                // if we are currently playing from the queue,
+                // don't add the first queued item, because we are currently playing that item
+                continue;
+            }
+
+            if let Ok(queued_track) = self.context_to_provided_track(
+                track,
+                Some(self.context_uri()),
+                Some(Provider::Queue),
+            ) {
+                self.add_to_queue(queued_track, false);
+            }
+        }
+
+        if self.shuffling_context() {
+            self.set_current_track(current_index.unwrap_or_default())?;
+            self.set_shuffle(true);
+            self.shuffle()?;
+        } else {
+            self.reset_playback_to_position(current_index)?;
+        }
+
+        self.update_restrictions();
+
+        Ok(())
+    }
+}

core/Cargo.toml

@@ -60,6 +60,8 @@ tokio-util = { version = "0.7", features = ["codec"] }
 url = "2"
 uuid = { version = "1", default-features = false, features = ["fast-rng", "v4"] }
 data-encoding = "2.5"
+flate2 = "1.0.33"
+protobuf-json-mapping = "3.5"
 
 # Eventually, this should use rustls-platform-verifier to unify the platform-specific dependencies
 # but currently, hyper-proxy2 and tokio-tungstenite do not support it.

core/src/config.rs

@@ -1,5 +1,6 @@
 use std::{fmt, path::PathBuf, str::FromStr};
 
+use librespot_protocol::devices::DeviceType as ProtoDeviceType;
 use url::Url;
 
 pub(crate) const KEYMASTER_CLIENT_ID: &str = "65b708073fc0480ea92a077233ca87bd";
@@ -146,3 +147,29 @@ impl fmt::Display for DeviceType {
         f.write_str(str)
     }
 }
+
+impl From<DeviceType> for ProtoDeviceType {
+    fn from(value: DeviceType) -> Self {
+        match value {
+            DeviceType::Unknown => ProtoDeviceType::UNKNOWN,
+            DeviceType::Computer => ProtoDeviceType::COMPUTER,
+            DeviceType::Tablet => ProtoDeviceType::TABLET,
+            DeviceType::Smartphone => ProtoDeviceType::SMARTPHONE,
+            DeviceType::Speaker => ProtoDeviceType::SPEAKER,
+            DeviceType::Tv => ProtoDeviceType::TV,
+            DeviceType::Avr => ProtoDeviceType::AVR,
+            DeviceType::Stb => ProtoDeviceType::STB,
+            DeviceType::AudioDongle => ProtoDeviceType::AUDIO_DONGLE,
+            DeviceType::GameConsole => ProtoDeviceType::GAME_CONSOLE,
+            DeviceType::CastAudio => ProtoDeviceType::CAST_VIDEO,
+            DeviceType::CastVideo => ProtoDeviceType::CAST_AUDIO,
+            DeviceType::Automobile => ProtoDeviceType::AUTOMOBILE,
+            DeviceType::Smartwatch => ProtoDeviceType::SMARTWATCH,
+            DeviceType::Chromebook => ProtoDeviceType::CHROMEBOOK,
+            DeviceType::UnknownSpotify => ProtoDeviceType::UNKNOWN_SPOTIFY,
+            DeviceType::CarThing => ProtoDeviceType::CAR_THING,
+            DeviceType::Observer => ProtoDeviceType::OBSERVER,
+            DeviceType::HomeThing => ProtoDeviceType::HOME_THING,
+        }
+    }
+}

core/src/connection/handshake.rs

@@ -233,8 +233,8 @@ where
     Ok(message)
 }
 
-async fn read_into_accumulator<'a, 'b, T: AsyncRead + Unpin>(
+async fn read_into_accumulator<'b, T: AsyncRead + Unpin>(
-    connection: &'a mut T,
+    connection: &mut T,
     size: usize,
     acc: &'b mut Vec<u8>,
 ) -> io::Result<&'b mut [u8]> {

core/src/dealer/manager.rs

@@ -0,0 +1,174 @@
+use futures_core::Stream;
+use futures_util::StreamExt;
+use std::{cell::OnceCell, pin::Pin, str::FromStr};
+use thiserror::Error;
+use tokio::sync::mpsc;
+use tokio_stream::wrappers::UnboundedReceiverStream;
+use url::Url;
+
+use super::{
+    protocol::Message, Builder, Dealer, GetUrlResult, Request, RequestHandler, Responder, Response,
+    Subscription,
+};
+use crate::{Error, Session};
+
+component! {
+    DealerManager: DealerManagerInner {
+        builder: OnceCell<Builder> = OnceCell::from(Builder::new()),
+        dealer: OnceCell<Dealer> = OnceCell::new(),
+    }
+}
+
+pub type BoxedStream<T> = Pin<Box<dyn Stream<Item = T> + Send>>;
+pub type BoxedStreamResult<T> = BoxedStream<Result<T, Error>>;
+
+#[derive(Error, Debug)]
+enum DealerError {
+    #[error("Builder wasn't available")]
+    BuilderNotAvailable,
+    #[error("Websocket couldn't be started because: {0}")]
+    LaunchFailure(Error),
+    #[error("Failed to set dealer")]
+    CouldNotSetDealer,
+}
+
+impl From<DealerError> for Error {
+    fn from(err: DealerError) -> Self {
+        Error::failed_precondition(err)
+    }
+}
+
+#[derive(Debug)]
+pub enum Reply {
+    Success,
+    Failure,
+    Unanswered,
+}
+
+pub type RequestReply = (Request, mpsc::UnboundedSender<Reply>);
+type RequestReceiver = mpsc::UnboundedReceiver<RequestReply>;
+type RequestSender = mpsc::UnboundedSender<RequestReply>;
+
+struct DealerRequestHandler(RequestSender);
+
+impl DealerRequestHandler {
+    pub fn new() -> (Self, RequestReceiver) {
+        let (tx, rx) = mpsc::unbounded_channel();
+        (DealerRequestHandler(tx), rx)
+    }
+}
+
+impl RequestHandler for DealerRequestHandler {
+    fn handle_request(&self, request: Request, responder: Responder) {
+        let (tx, mut rx) = mpsc::unbounded_channel();
+
+        if let Err(why) = self.0.send((request, tx)) {
+            error!("failed sending dealer request {why}");
+            responder.send(Response { success: false });
+            return;
+        }
+
+        tokio::spawn(async move {
+            let reply = rx.recv().await.unwrap_or(Reply::Failure);
+            debug!("replying to ws request: {reply:?}");
+            match reply {
+                Reply::Unanswered => responder.force_unanswered(),
+                Reply::Success | Reply::Failure => responder.send(Response {
+                    success: matches!(reply, Reply::Success),
+                }),
+            }
+        });
+    }
+}
+
+impl DealerManager {
+    async fn get_url(session: Session) -> GetUrlResult {
+        let (host, port) = session.apresolver().resolve("dealer").await?;
+        let token = session.login5().auth_token().await?.access_token;
+        let url = format!("wss://{host}:{port}/?access_token={token}");
+        let url = Url::from_str(&url)?;
+        Ok(url)
+    }
+
+    pub fn add_listen_for(&self, url: impl Into<String>) -> Result<Subscription, Error> {
+        let url = url.into();
+        self.lock(|inner| {
+            if let Some(dealer) = inner.dealer.get() {
+                dealer.subscribe(&[&url])
+            } else if let Some(builder) = inner.builder.get_mut() {
+                builder.subscribe(&[&url])
+            } else {
+                Err(DealerError::BuilderNotAvailable.into())
+            }
+        })
+    }
+
+    pub fn listen_for<T>(
+        &self,
+        uri: impl Into<String>,
+        t: impl Fn(Message) -> Result<T, Error> + Send + 'static,
+    ) -> Result<BoxedStreamResult<T>, Error> {
+        Ok(Box::pin(self.add_listen_for(uri)?.map(t)))
+    }
+
+    pub fn add_handle_for(&self, url: impl Into<String>) -> Result<RequestReceiver, Error> {
+        let url = url.into();
+
+        let (handler, receiver) = DealerRequestHandler::new();
+        self.lock(|inner| {
+            if let Some(dealer) = inner.dealer.get() {
+                dealer.add_handler(&url, handler).map(|_| receiver)
+            } else if let Some(builder) = inner.builder.get_mut() {
+                builder.add_handler(&url, handler).map(|_| receiver)
+            } else {
+                Err(DealerError::BuilderNotAvailable.into())
+            }
+        })
+    }
+
+    pub fn handle_for(&self, uri: impl Into<String>) -> Result<BoxedStream<RequestReply>, Error> {
+        Ok(Box::pin(
+            self.add_handle_for(uri).map(UnboundedReceiverStream::new)?,
+        ))
+    }
+
+    pub fn handles(&self, uri: &str) -> bool {
+        self.lock(|inner| {
+            if let Some(dealer) = inner.dealer.get() {
+                dealer.handles(uri)
+            } else if let Some(builder) = inner.builder.get() {
+                builder.handles(uri)
+            } else {
+                false
+            }
+        })
+    }
+
+    pub async fn start(&self) -> Result<(), Error> {
+        debug!("Launching dealer");
+
+        let session = self.session();
+        // the url has to be a function that can retrieve a new url,
+        // otherwise when we later try to reconnect with the initial url/token
+        // and the token is expired we will just get 401 error
+        let get_url = move || Self::get_url(session.clone());
+
+        let dealer = self
+            .lock(move |inner| inner.builder.take())
+            .ok_or(DealerError::BuilderNotAvailable)?
+            .launch(get_url, None)
+            .await
+            .map_err(DealerError::LaunchFailure)?;
+
+        self.lock(|inner| inner.dealer.set(dealer))
+            .map_err(|_| DealerError::CouldNotSetDealer)?;
+
+        Ok(())
+    }
+
+    pub async fn close(&self) {
+        if let Some(dealer) = self.lock(|inner| inner.dealer.take()) {
+            dealer.close().await
+        }
+    }
+}

core/src/dealer/maps.rs

@@ -1,8 +1,7 @@
 use std::collections::HashMap;
 
-use thiserror::Error;
-
 use crate::Error;
+use thiserror::Error;
 
 #[derive(Debug, Error)]
 pub enum HandlerMapError {
@@ -28,6 +27,10 @@ impl<T> Default for HandlerMap<T> {
 }
 
 impl<T> HandlerMap<T> {
+    pub fn contains(&self, path: &str) -> bool {
+        matches!(self, HandlerMap::Branch(map) if map.contains_key(path))
+    }
+
     pub fn insert<'a>(
         &mut self,
         mut path: impl Iterator<Item = &'a str>,
@@ -107,6 +110,22 @@ impl<T> SubscriberMap<T> {
         }
     }
 
+    pub fn contains<'a>(&self, mut path: impl Iterator<Item = &'a str>) -> bool {
+        if !self.subscribed.is_empty() {
+            return true;
+        }
+
+        if let Some(next) = path.next() {
+            if let Some(next_map) = self.children.get(next) {
+                return next_map.contains(path);
+            }
+        } else {
+            return !self.is_empty();
+        }
+
+        false
+    }
+
     pub fn is_empty(&self) -> bool {
         self.children.is_empty() && self.subscribed.is_empty()
     }
@@ -115,16 +134,22 @@ impl<T> SubscriberMap<T> {
         &mut self,
         mut path: impl Iterator<Item = &'a str>,
         fun: &mut impl FnMut(&T) -> bool,
-    ) {
+    ) -> bool {
-        self.subscribed.retain(|x| fun(x));
+        let mut handled_by_any = false;
+        self.subscribed.retain(|x| {
+            handled_by_any = true;
+            fun(x)
+        });
 
         if let Some(next) = path.next() {
             if let Some(y) = self.children.get_mut(next) {
-                y.retain(path, fun);
+                handled_by_any = handled_by_any || y.retain(path, fun);
                 if y.is_empty() {
                     self.children.remove(next);
                 }
             }
         }
+
+        handled_by_any
     }
 }

core/src/dealer/mod.rs

@@ -1,3 +1,4 @@
+pub mod manager;
 mod maps;
 pub mod protocol;
 
@@ -28,8 +29,10 @@ use tokio_tungstenite::tungstenite;
 use tungstenite::error::UrlError;
 use url::Url;
 
-use self::maps::*;
+use self::{
-use self::protocol::*;
+    maps::*,
+    protocol::{Message, MessageOrRequest, Request, WebsocketMessage, WebsocketRequest},
+};
 
 use crate::{
     socket,
@@ -39,7 +42,14 @@ use crate::{
 
 type WsMessage = tungstenite::Message;
 type WsError = tungstenite::Error;
-type WsResult<T> = Result<T, tungstenite::Error>;
+type WsResult<T> = Result<T, Error>;
+type GetUrlResult = Result<Url, Error>;
+
+impl From<WsError> for Error {
+    fn from(err: WsError) -> Self {
+        Error::failed_precondition(err)
+    }
+}
 
 const WEBSOCKET_CLOSE_TIMEOUT: Duration = Duration::from_secs(3);
 
@@ -48,11 +58,11 @@ const PING_TIMEOUT: Duration = Duration::from_secs(3);
 
 const RECONNECT_INTERVAL: Duration = Duration::from_secs(10);
 
-pub struct Response {
+struct Response {
     pub success: bool,
 }
 
-pub struct Responder {
+struct Responder {
     key: String,
     tx: mpsc::UnboundedSender<WsMessage>,
     sent: bool,
@@ -101,7 +111,7 @@ impl Drop for Responder {
     }
 }
 
-pub trait IntoResponse {
+trait IntoResponse {
     fn respond(self, responder: Responder);
 }
 
@@ -132,7 +142,7 @@ where
     }
 }
 
-pub trait RequestHandler: Send + 'static {
+trait RequestHandler: Send + 'static {
     fn handle_request(&self, request: Request, responder: Responder);
 }
 
@@ -156,8 +166,10 @@ impl Stream for Subscription {
 fn split_uri(s: &str) -> Option<impl Iterator<Item = &'_ str>> {
     let (scheme, sep, rest) = if let Some(rest) = s.strip_prefix("hm://") {
         ("hm", '/', rest)
-    } else if let Some(rest) = s.strip_suffix("spotify:") {
+    } else if let Some(rest) = s.strip_prefix("spotify:") {
         ("spotify", ':', rest)
+    } else if s.contains('/') {
+        ("", '/', s)
     } else {
         return None;
     };
@@ -169,7 +181,7 @@ fn split_uri(s: &str) -> Option<impl Iterator<Item = &'_ str>> {
 }
 
 #[derive(Debug, Clone, Error)]
-pub enum AddHandlerError {
+enum AddHandlerError {
     #[error("There is already a handler for the given uri")]
     AlreadyHandled,
     #[error("The specified uri {0} is invalid")]
@@ -186,7 +198,7 @@ impl From<AddHandlerError> for Error {
 }
 
 #[derive(Debug, Clone, Error)]
-pub enum SubscriptionError {
+enum SubscriptionError {
     #[error("The specified uri is invalid")]
     InvalidUri(String),
 }
@@ -224,8 +236,23 @@ fn subscribe(
     Ok(Subscription(rx))
 }
 
+fn handles(
+    req_map: &HandlerMap<Box<dyn RequestHandler>>,
+    msg_map: &SubscriberMap<MessageHandler>,
+    uri: &str,
+) -> bool {
+    if req_map.contains(uri) {
+        return true;
+    }
+
+    match split_uri(uri) {
+        None => false,
+        Some(mut split) => msg_map.contains(&mut split),
+    }
+}
+
 #[derive(Default)]
-pub struct Builder {
+struct Builder {
     message_handlers: SubscriberMap<MessageHandler>,
     request_handlers: HandlerMap<Box<dyn RequestHandler>>,
 }
@@ -267,22 +294,26 @@ impl Builder {
         subscribe(&mut self.message_handlers, uris)
     }
 
+    pub fn handles(&self, uri: &str) -> bool {
+        handles(&self.request_handlers, &self.message_handlers, uri)
+    }
+
     pub fn launch_in_background<Fut, F>(self, get_url: F, proxy: Option<Url>) -> Dealer
     where
-        Fut: Future<Output = Url> + Send + 'static,
+        Fut: Future<Output = GetUrlResult> + Send + 'static,
-        F: (FnMut() -> Fut) + Send + 'static,
+        F: (Fn() -> Fut) + Send + 'static,
     {
         create_dealer!(self, shared -> run(shared, None, get_url, proxy))
     }
 
-    pub async fn launch<Fut, F>(self, mut get_url: F, proxy: Option<Url>) -> WsResult<Dealer>
+    pub async fn launch<Fut, F>(self, get_url: F, proxy: Option<Url>) -> WsResult<Dealer>
     where
-        Fut: Future<Output = Url> + Send + 'static,
+        Fut: Future<Output = GetUrlResult> + Send + 'static,
-        F: (FnMut() -> Fut) + Send + 'static,
+        F: (Fn() -> Fut) + Send + 'static,
     {
         let dealer = create_dealer!(self, shared -> {
             // Try to connect.
-            let url = get_url().await;
+            let url = get_url().await?;
             let tasks = connect(&url, proxy.as_ref(), &shared).await?;
 
             // If a connection is established, continue in a background task.
@@ -303,15 +334,47 @@ struct DealerShared {
 }
 
 impl DealerShared {
-    fn dispatch_message(&self, msg: Message) {
+    fn dispatch_message(&self, mut msg: WebsocketMessage) {
+        let msg = match msg.handle_payload() {
+            Ok(value) => Message {
+                headers: msg.headers,
+                payload: value,
+                uri: msg.uri,
+            },
+            Err(why) => {
+                warn!("failure during data parsing for {}: {why}", msg.uri);
+                return;
+            }
+        };
+
         if let Some(split) = split_uri(&msg.uri) {
-            self.message_handlers
+            if self
+                .message_handlers
                 .lock()
-                .retain(split, &mut |tx| tx.send(msg.clone()).is_ok());
+                .retain(split, &mut |tx| tx.send(msg.clone()).is_ok())
+            {
+                return;
             }
         }
 
-    fn dispatch_request(&self, request: Request, send_tx: &mpsc::UnboundedSender<WsMessage>) {
+        warn!("No subscriber for msg.uri: {}", msg.uri);
+    }
+
+    fn dispatch_request(
+        &self,
+        request: WebsocketRequest,
+        send_tx: &mpsc::UnboundedSender<WsMessage>,
+    ) {
+        trace!("dealer request {}", &request.message_ident);
+
+        let payload_request = match request.handle_payload() {
+            Ok(payload) => payload,
+            Err(why) => {
+                warn!("request payload handling failed because of {why}");
+                return;
+            }
+        };
+
         // ResponseSender will automatically send "success: false" if it is dropped without an answer.
         let responder = Responder::new(request.key.clone(), send_tx.clone());
 
@@ -325,14 +388,12 @@ impl DealerShared {
             return;
         };
 
-        {
         let handler_map = self.request_handlers.lock();
 
         if let Some(handler) = handler_map.get(split) {
-                handler.handle_request(request, responder);
+            handler.handle_request(payload_request, responder);
             return;
         }
-        }
 
         warn!("No handler for message_ident: {}", &request.message_ident);
     }
@@ -355,9 +416,9 @@ impl DealerShared {
     }
 }
 
-pub struct Dealer {
+struct Dealer {
     shared: Arc<DealerShared>,
-    handle: TimeoutOnDrop<()>,
+    handle: TimeoutOnDrop<Result<(), Error>>,
 }
 
 impl Dealer {
@@ -376,6 +437,14 @@ impl Dealer {
         subscribe(&mut self.shared.message_handlers.lock(), uris)
     }
 
+    pub fn handles(&self, uri: &str) -> bool {
+        handles(
+            &self.shared.request_handlers.lock(),
+            &self.shared.message_handlers.lock(),
+            uri,
+        )
+    }
+
     pub async fn close(mut self) {
         debug!("closing dealer");
 
@@ -402,7 +471,7 @@ async fn connect(
     let default_port = match address.scheme() {
         "ws" => 80,
         "wss" => 443,
-        _ => return Err(WsError::Url(UrlError::UnsupportedUrlScheme)),
+        _ => return Err(WsError::Url(UrlError::UnsupportedUrlScheme).into()),
     };
 
     let port = address.port().unwrap_or(default_port);
@@ -484,13 +553,13 @@ async fn connect(
                     Some(Ok(msg)) => match msg {
                         WsMessage::Text(t) => match serde_json::from_str(&t) {
                             Ok(m) => shared.dispatch(m, &send_tx),
-                            Err(e) => info!("Received invalid message: {}", e),
+                            Err(e) => warn!("Message couldn't be parsed: {e}. Message was {t}"),
                         },
                         WsMessage::Binary(_) => {
                             info!("Received invalid binary message");
                         }
                         WsMessage::Pong(_) => {
-                            debug!("Received pong");
+                            trace!("Received pong");
                             pong_received.store(true, atomic::Ordering::Relaxed);
                         }
                         _ => (), // tungstenite handles Close and Ping automatically
@@ -522,7 +591,7 @@ async fn connect(
                     break;
                 }
 
-                debug!("Sent ping");
+                trace!("Sent ping");
 
                 sleep(PING_TIMEOUT).await;
 
@@ -556,8 +625,9 @@ async fn run<F, Fut>(
     initial_tasks: Option<(JoinHandle<()>, JoinHandle<()>)>,
     mut get_url: F,
     proxy: Option<Url>,
-) where
+) -> Result<(), Error>
-    Fut: Future<Output = Url> + Send + 'static,
+where
+    Fut: Future<Output = GetUrlResult> + Send + 'static,
     F: (FnMut() -> Fut) + Send + 'static,
 {
     let init_task = |t| Some(TimeoutOnDrop::new(t, WEBSOCKET_CLOSE_TIMEOUT));
@@ -593,7 +663,7 @@ async fn run<F, Fut>(
                         break
                     },
                     e = get_url() => e
-                };
+                }?;
 
                 match connect(&url, proxy.as_ref(), &shared).await {
                     Ok((s, r)) => tasks = (init_task(s), init_task(r)),
@@ -609,4 +679,6 @@ async fn run<F, Fut>(
     let tasks = tasks.0.into_iter().chain(tasks.1);
 
     let _ = join_all(tasks).await;
+
+    Ok(())
 }

core/src/dealer/protocol.rs

@@ -1,19 +1,58 @@
+pub mod request;
+
+pub use request::*;
+
 use std::collections::HashMap;
+use std::io::{Error as IoError, Read};
 
+use crate::Error;
+use base64::prelude::BASE64_STANDARD;
+use base64::{DecodeError, Engine};
+use flate2::read::GzDecoder;
+use log::LevelFilter;
 use serde::Deserialize;
+use serde_json::Error as SerdeError;
+use thiserror::Error;
 
-pub type JsonValue = serde_json::Value;
+const IGNORE_UNKNOWN: protobuf_json_mapping::ParseOptions = protobuf_json_mapping::ParseOptions {
-pub type JsonObject = serde_json::Map<String, JsonValue>;
+    ignore_unknown_fields: true,
+    _future_options: (),
+};
 
-#[derive(Clone, Debug, Deserialize)]
+type JsonValue = serde_json::Value;
-pub struct Payload {
+
-    pub message_id: i32,
+#[derive(Debug, Error)]
-    pub sent_by_device_id: String,
+enum ProtocolError {
-    pub command: JsonObject,
+    #[error("base64 decoding failed: {0}")]
+    Base64(DecodeError),
+    #[error("gzip decoding failed: {0}")]
+    GZip(IoError),
+    #[error("deserialization failed: {0}")]
+    Deserialization(SerdeError),
+    #[error("payload had more then one value. had {0} values")]
+    MoreThenOneValue(usize),
+    #[error("received unexpected data {0:#?}")]
+    UnexpectedData(PayloadValue),
+    #[error("payload was empty")]
+    Empty,
+}
+
+impl From<ProtocolError> for Error {
+    fn from(err: ProtocolError) -> Self {
+        match err {
+            ProtocolError::UnexpectedData(_) => Error::unavailable(err),
+            _ => Error::failed_precondition(err),
+        }
+    }
 }
 
 #[derive(Clone, Debug, Deserialize)]
-pub struct Request {
+pub(super) struct Payload {
+    pub compressed: String,
+}
+
+#[derive(Clone, Debug, Deserialize)]
+pub(super) struct WebsocketRequest {
     #[serde(default)]
     pub headers: HashMap<String, String>,
     pub message_ident: String,
@@ -22,18 +61,133 @@ pub struct Request {
 }
 
 #[derive(Clone, Debug, Deserialize)]
-pub struct Message {
+pub(super) struct WebsocketMessage {
     #[serde(default)]
     pub headers: HashMap<String, String>,
     pub method: Option<String>,
     #[serde(default)]
-    pub payloads: Vec<JsonValue>,
+    pub payloads: Vec<MessagePayloadValue>,
     pub uri: String,
 }
 
+#[derive(Clone, Debug, Deserialize)]
+#[serde(untagged)]
+pub enum MessagePayloadValue {
+    String(String),
+    Bytes(Vec<u8>),
+    Json(JsonValue),
+}
+
 #[derive(Clone, Debug, Deserialize)]
 #[serde(tag = "type", rename_all = "snake_case")]
 pub(super) enum MessageOrRequest {
-    Message(Message),
+    Message(WebsocketMessage),
-    Request(Request),
+    Request(WebsocketRequest),
+}
+
+#[derive(Clone, Debug)]
+pub enum PayloadValue {
+    Empty,
+    Raw(Vec<u8>),
+    Json(String),
+}
+
+#[derive(Clone, Debug)]
+pub struct Message {
+    pub headers: HashMap<String, String>,
+    pub payload: PayloadValue,
+    pub uri: String,
+}
+
+impl Message {
+    pub fn from_json<M: protobuf::MessageFull>(value: Self) -> Result<M, Error> {
+        use protobuf_json_mapping::*;
+        match value.payload {
+            PayloadValue::Json(json) => match parse_from_str::<M>(&json) {
+                Ok(message) => Ok(message),
+                Err(_) => match parse_from_str_with_options(&json, &IGNORE_UNKNOWN) {
+                    Ok(message) => Ok(message),
+                    Err(why) => Err(Error::failed_precondition(why)),
+                },
+            },
+            other => Err(ProtocolError::UnexpectedData(other).into()),
+        }
+    }
+
+    pub fn from_raw<M: protobuf::Message>(value: Self) -> Result<M, Error> {
+        match value.payload {
+            PayloadValue::Raw(bytes) => {
+                M::parse_from_bytes(&bytes).map_err(Error::failed_precondition)
+            }
+            other => Err(ProtocolError::UnexpectedData(other).into()),
+        }
+    }
+}
+
+impl WebsocketMessage {
+    pub fn handle_payload(&mut self) -> Result<PayloadValue, Error> {
+        if self.payloads.is_empty() {
+            return Ok(PayloadValue::Empty);
+        } else if self.payloads.len() > 1 {
+            return Err(ProtocolError::MoreThenOneValue(self.payloads.len()).into());
+        }
+
+        let payload = self.payloads.pop().ok_or(ProtocolError::Empty)?;
+        let bytes = match payload {
+            MessagePayloadValue::String(string) => BASE64_STANDARD
+                .decode(string)
+                .map_err(ProtocolError::Base64)?,
+            MessagePayloadValue::Bytes(bytes) => bytes,
+            MessagePayloadValue::Json(json) => return Ok(PayloadValue::Json(json.to_string())),
+        };
+
+        handle_transfer_encoding(&self.headers, bytes).map(PayloadValue::Raw)
+    }
+}
+
+impl WebsocketRequest {
+    pub fn handle_payload(&self) -> Result<Request, Error> {
+        let payload_bytes = BASE64_STANDARD
+            .decode(&self.payload.compressed)
+            .map_err(ProtocolError::Base64)?;
+
+        let payload = handle_transfer_encoding(&self.headers, payload_bytes)?;
+        let payload = String::from_utf8(payload)?;
+
+        if log::max_level() >= LevelFilter::Trace {
+            if let Ok(json) = serde_json::from_str::<serde_json::Value>(&payload) {
+                trace!("websocket request: {json:#?}");
+            } else {
+                trace!("websocket request: {payload}");
+            }
+        }
+
+        serde_json::from_str(&payload)
+            .map_err(ProtocolError::Deserialization)
+            .map_err(Into::into)
+    }
+}
+
+fn handle_transfer_encoding(
+    headers: &HashMap<String, String>,
+    data: Vec<u8>,
+) -> Result<Vec<u8>, Error> {
+    let encoding = headers.get("Transfer-Encoding").map(String::as_str);
+    if let Some(encoding) = encoding {
+        trace!("message was send with {encoding} encoding ");
+    }
+
+    if !matches!(encoding, Some("gzip")) {
+        return Ok(data);
+    }
+
+    let mut gz = GzDecoder::new(&data[..]);
+    let mut bytes = vec![];
+    match gz.read_to_end(&mut bytes) {
+        Ok(i) if i == bytes.len() => Ok(bytes),
+        Ok(_) => Err(Error::failed_precondition(
+            "read bytes mismatched with expected bytes",
+        )),
+        Err(why) => Err(ProtocolError::GZip(why).into()),
+    }
 }

core/src/dealer/protocol/request.rs

@@ -0,0 +1,208 @@
+use crate::deserialize_with::*;
+use librespot_protocol::player::{
+    Context, ContextPlayerOptionOverrides, PlayOrigin, ProvidedTrack, TransferState,
+};
+use serde::Deserialize;
+use serde_json::Value;
+use std::fmt::{Display, Formatter};
+
+#[derive(Clone, Debug, Deserialize)]
+pub struct Request {
+    pub message_id: u32,
+    // todo: did only send target_alias_id: null so far, maybe we just ignore it, will see
+    // pub target_alias_id: Option<()>,
+    pub sent_by_device_id: String,
+    pub command: Command,
+}
+
+#[derive(Clone, Debug, Deserialize)]
+#[serde(tag = "endpoint", rename_all = "snake_case")]
+pub enum Command {
+    Transfer(TransferCommand),
+    #[serde(deserialize_with = "boxed")]
+    Play(Box<PlayCommand>),
+    Pause(PauseCommand),
+    SeekTo(SeekToCommand),
+    SetShufflingContext(SetValueCommand),
+    SetRepeatingTrack(SetValueCommand),
+    SetRepeatingContext(SetValueCommand),
+    AddToQueue(AddToQueueCommand),
+    SetQueue(SetQueueCommand),
+    SetOptions(SetOptionsCommand),
+    UpdateContext(UpdateContextCommand),
+    SkipNext(SkipNextCommand),
+    // commands that don't send any context (at least not usually...)
+    SkipPrev(GenericCommand),
+    Resume(GenericCommand),
+    // catch unknown commands, so that we can implement them later
+    #[serde(untagged)]
+    Unknown(Value),
+}
+
+impl Display for Command {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        use Command::*;
+
+        write!(
+            f,
+            "endpoint: {}{}",
+            matches!(self, Unknown(_))
+                .then_some("unknown ")
+                .unwrap_or_default(),
+            match self {
+                Transfer(_) => "transfer",
+                Play(_) => "play",
+                Pause(_) => "pause",
+                SeekTo(_) => "seek_to",
+                SetShufflingContext(_) => "set_shuffling_context",
+                SetRepeatingContext(_) => "set_repeating_context",
+                SetRepeatingTrack(_) => "set_repeating_track",
+                AddToQueue(_) => "add_to_queue",
+                SetQueue(_) => "set_queue",
+                SetOptions(_) => "set_options",
+                UpdateContext(_) => "update_context",
+                SkipNext(_) => "skip_next",
+                SkipPrev(_) => "skip_prev",
+                Resume(_) => "resume",
+                Unknown(json) => {
+                    json.as_object()
+                        .and_then(|obj| obj.get("endpoint").map(|v| v.as_str()))
+                        .flatten()
+                        .unwrap_or("???")
+                }
+            }
+        )
+    }
+}
+
+#[derive(Clone, Debug, Deserialize)]
+pub struct TransferCommand {
+    #[serde(default, deserialize_with = "base64_proto")]
+    pub data: Option<TransferState>,
+    pub options: TransferOptions,
+    pub from_device_identifier: String,
+    pub logging_params: LoggingParams,
+}
+
+#[derive(Clone, Debug, Deserialize)]
+pub struct PlayCommand {
+    #[serde(deserialize_with = "json_proto")]
+    pub context: Context,
+    #[serde(deserialize_with = "json_proto")]
+    pub play_origin: PlayOrigin,
+    pub options: PlayOptions,
+    pub logging_params: LoggingParams,
+}
+
+#[derive(Clone, Debug, Deserialize)]
+pub struct PauseCommand {
+    // does send options with it, but seems to be empty, investigate which options are send here
+    pub logging_params: LoggingParams,
+}
+
+#[derive(Clone, Debug, Deserialize)]
+pub struct SeekToCommand {
+    pub value: u32,
+    pub position: u32,
+    pub logging_params: LoggingParams,
+}
+
+#[derive(Clone, Debug, Deserialize)]
+pub struct SkipNextCommand {
+    #[serde(default, deserialize_with = "option_json_proto")]
+    pub track: Option<ProvidedTrack>,
+    pub logging_params: LoggingParams,
+}
+
+#[derive(Clone, Debug, Deserialize)]
+pub struct SetValueCommand {
+    pub value: bool,
+    pub logging_params: LoggingParams,
+}
+
+#[derive(Clone, Debug, Deserialize)]
+pub struct AddToQueueCommand {
+    #[serde(deserialize_with = "json_proto")]
+    pub track: ProvidedTrack,
+    pub logging_params: LoggingParams,
+}
+
+#[derive(Clone, Debug, Deserialize)]
+pub struct SetQueueCommand {
+    #[serde(deserialize_with = "vec_json_proto")]
+    pub next_tracks: Vec<ProvidedTrack>,
+    #[serde(deserialize_with = "vec_json_proto")]
+    pub prev_tracks: Vec<ProvidedTrack>,
+    // this queue revision is actually the last revision, so using it will not update the web ui
+    // might be that internally they use the last revision to create the next revision
+    pub queue_revision: String,
+    pub logging_params: LoggingParams,
+}
+
+#[derive(Clone, Debug, Deserialize)]
+pub struct SetOptionsCommand {
+    pub shuffling_context: Option<bool>,
+    pub repeating_context: Option<bool>,
+    pub repeating_track: Option<bool>,
+    pub options: Option<OptionsOptions>,
+    pub logging_params: LoggingParams,
+}
+
+#[derive(Clone, Debug, Deserialize)]
+pub struct UpdateContextCommand {
+    #[serde(deserialize_with = "json_proto")]
+    pub context: Context,
+    pub session_id: Option<String>,
+}
+
+#[derive(Clone, Debug, Deserialize)]
+pub struct GenericCommand {
+    pub logging_params: LoggingParams,
+}
+
+#[derive(Clone, Debug, Deserialize)]
+pub struct TransferOptions {
+    pub restore_paused: String,
+    pub restore_position: String,
+    pub restore_track: String,
+    pub retain_session: String,
+}
+
+#[derive(Clone, Debug, Deserialize)]
+pub struct PlayOptions {
+    pub skip_to: SkipTo,
+    #[serde(default, deserialize_with = "option_json_proto")]
+    pub player_options_override: Option<ContextPlayerOptionOverrides>,
+    pub license: Option<String>,
+    // possible to send wie web-api
+    pub seek_to: Option<u32>,
+    // mobile
+    pub always_play_something: Option<bool>,
+    pub audio_stream: Option<String>,
+    pub initially_paused: Option<bool>,
+    pub prefetch_level: Option<String>,
+    pub system_initiated: Option<bool>,
+}
+
+#[derive(Clone, Debug, Deserialize)]
+pub struct OptionsOptions {
+    only_for_local_device: bool,
+    override_restrictions: bool,
+    system_initiated: bool,
+}
+
+#[derive(Clone, Debug, Deserialize)]
+pub struct SkipTo {
+    pub track_uid: Option<String>,
+    pub track_uri: Option<String>,
+    pub track_index: Option<u32>,
+}
+
+#[derive(Clone, Debug, Deserialize)]
+pub struct LoggingParams {
+    pub interaction_ids: Option<Vec<String>>,
+    pub device_identifier: Option<String>,
+    pub command_initiated_time: Option<i64>,
+    pub page_instance_ids: Option<Vec<String>>,
+    pub command_id: Option<String>,
+}

core/src/deserialize_with.rs

@@ -0,0 +1,94 @@
+use base64::prelude::BASE64_STANDARD;
+use base64::Engine;
+use protobuf::MessageFull;
+use serde::de::{Error, Unexpected};
+use serde::{Deserialize, Deserializer};
+use serde_json::Value;
+
+const IGNORE_UNKNOWN: protobuf_json_mapping::ParseOptions = protobuf_json_mapping::ParseOptions {
+    ignore_unknown_fields: true,
+    _future_options: (),
+};
+
+fn parse_value_to_msg<T: MessageFull>(
+    value: &Value,
+) -> Result<T, protobuf_json_mapping::ParseError> {
+    protobuf_json_mapping::parse_from_str_with_options::<T>(&value.to_string(), &IGNORE_UNKNOWN)
+}
+
+pub fn base64_proto<'de, T, D>(de: D) -> Result<Option<T>, D::Error>
+where
+    T: MessageFull,
+    D: Deserializer<'de>,
+{
+    let v: String = Deserialize::deserialize(de)?;
+    let bytes = BASE64_STANDARD
+        .decode(v)
+        .map_err(|e| Error::custom(e.to_string()))?;
+
+    T::parse_from_bytes(&bytes).map(Some).map_err(Error::custom)
+}
+
+pub fn json_proto<'de, T, D>(de: D) -> Result<T, D::Error>
+where
+    T: MessageFull,
+    D: Deserializer<'de>,
+{
+    let v: Value = Deserialize::deserialize(de)?;
+    parse_value_to_msg(&v).map_err(|why| {
+        warn!("deserialize_json_proto: {v}");
+        error!("deserialize_json_proto: {why}");
+        Error::custom(why)
+    })
+}
+
+pub fn option_json_proto<'de, T, D>(de: D) -> Result<Option<T>, D::Error>
+where
+    T: MessageFull,
+    D: Deserializer<'de>,
+{
+    let v: Value = Deserialize::deserialize(de)?;
+    parse_value_to_msg(&v).map(Some).map_err(Error::custom)
+}
+
+pub fn vec_json_proto<'de, T, D>(de: D) -> Result<Vec<T>, D::Error>
+where
+    T: MessageFull,
+    D: Deserializer<'de>,
+{
+    let v: Value = Deserialize::deserialize(de)?;
+    let array = match v {
+        Value::Array(array) => array,
+        _ => return Err(Error::custom("the value wasn't an array")),
+    };
+
+    let res = array
+        .iter()
+        .flat_map(parse_value_to_msg)
+        .collect::<Vec<T>>();
+
+    Ok(res)
+}
+
+pub fn boxed<'de, T, D>(de: D) -> Result<Box<T>, D::Error>
+where
+    T: Deserialize<'de>,
+    D: Deserializer<'de>,
+{
+    let v: T = Deserialize::deserialize(de)?;
+    Ok(Box::new(v))
+}
+
+pub fn bool_from_string<'de, D>(de: D) -> Result<bool, D::Error>
+where
+    D: Deserializer<'de>,
+{
+    match String::deserialize(de)?.as_ref() {
+        "true" => Ok(true),
+        "false" => Ok(false),
+        other => Err(Error::invalid_value(
+            Unexpected::Str(other),
+            &"true or false",
+        )),
+    }
+}

core/src/error.rs

@@ -499,3 +499,9 @@ impl From<Utf8Error> for Error {
         Self::new(ErrorKind::FailedPrecondition, err)
     }
 }
+
+impl From<protobuf_json_mapping::ParseError> for Error {
+    fn from(err: protobuf_json_mapping::ParseError) -> Self {
+        Self::failed_precondition(err)
+    }
+}

core/src/http_client.rs

@@ -208,7 +208,7 @@ impl HttpClient {
                     }
                 }
 
-                if code != StatusCode::OK {
+                if !code.is_success() {
                     return Err(HttpClientError::StatusCode(code).into());
                 }
             }

core/src/lib.rs

@@ -16,7 +16,8 @@ pub mod config;
 mod connection;
 pub mod date;
 #[allow(dead_code)]
-mod dealer;
+pub mod dealer;
+pub mod deserialize_with;
 #[doc(hidden)]
 pub mod diffie_hellman;
 pub mod error;

core/src/mercury/mod.rs

@@ -276,12 +276,15 @@ impl MercuryManager {
                 });
             });
 
-            if !found {
+            if found {
+                Ok(())
+            } else if self.session().dealer().handles(&response.uri) {
+                trace!("mercury response <{}> is handled by dealer", response.uri);
+                Ok(())
+            } else {
                 debug!("unknown subscription uri={}", &response.uri);
                 trace!("response pushed over Mercury: {:?}", response);
                 Err(MercuryError::Response(response).into())
-            } else {
-                Ok(())
             }
         } else if let Some(cb) = pending.callback {
             cb.send(Ok(response)).map_err(|_| MercuryError::Channel)?;

core/src/session.rs

@@ -9,23 +9,7 @@ use std::{
     time::{Duration, SystemTime, UNIX_EPOCH},
 };
 
-use byteorder::{BigEndian, ByteOrder};
+use crate::dealer::manager::DealerManager;
-use bytes::Bytes;
-use futures_core::TryStream;
-use futures_util::StreamExt;
-use librespot_protocol::authentication::AuthenticationType;
-use num_traits::FromPrimitive;
-use once_cell::sync::OnceCell;
-use parking_lot::RwLock;
-use pin_project_lite::pin_project;
-use quick_xml::events::Event;
-use thiserror::Error;
-use tokio::{
-    sync::mpsc,
-    time::{sleep, Duration as TokioDuration, Instant as TokioInstant, Sleep},
-};
-use tokio_stream::wrappers::UnboundedReceiverStream;
-
 use crate::{
     apresolve::{ApResolver, SocketAddress},
     audio_key::AudioKeyManager,
@@ -43,6 +27,23 @@ use crate::{
     token::TokenProvider,
     Error,
 };
+use byteorder::{BigEndian, ByteOrder};
+use bytes::Bytes;
+use futures_core::TryStream;
+use futures_util::StreamExt;
+use librespot_protocol::authentication::AuthenticationType;
+use num_traits::FromPrimitive;
+use once_cell::sync::OnceCell;
+use parking_lot::RwLock;
+use pin_project_lite::pin_project;
+use quick_xml::events::Event;
+use thiserror::Error;
+use tokio::{
+    sync::mpsc,
+    time::{sleep, Duration as TokioDuration, Instant as TokioInstant, Sleep},
+};
+use tokio_stream::wrappers::UnboundedReceiverStream;
+use uuid::Uuid;
 
 #[derive(Debug, Error)]
 pub enum SessionError {
@@ -78,6 +79,7 @@ pub struct UserData {
 
 #[derive(Debug, Clone, Default)]
 struct SessionData {
+    session_id: String,
     client_id: String,
     client_name: String,
     client_brand_name: String,
@@ -100,6 +102,7 @@ struct SessionInternal {
     audio_key: OnceCell<AudioKeyManager>,
     channel: OnceCell<ChannelManager>,
     mercury: OnceCell<MercuryManager>,
+    dealer: OnceCell<DealerManager>,
     spclient: OnceCell<SpClient>,
     token_provider: OnceCell<TokenProvider>,
     login5: OnceCell<Login5Manager>,
@@ -128,6 +131,8 @@ impl Session {
 
         let session_data = SessionData {
             client_id: config.client_id.clone(),
+            // can be any guid, doesn't need to be simple
+            session_id: Uuid::new_v4().as_simple().to_string(),
             ..SessionData::default()
         };
 
@@ -141,6 +146,7 @@ impl Session {
             audio_key: OnceCell::new(),
             channel: OnceCell::new(),
             mercury: OnceCell::new(),
+            dealer: OnceCell::new(),
             spclient: OnceCell::new(),
             token_provider: OnceCell::new(),
             login5: OnceCell::new(),
@@ -303,6 +309,12 @@ impl Session {
             .get_or_init(|| MercuryManager::new(self.weak()))
     }
 
+    pub fn dealer(&self) -> &DealerManager {
+        self.0
+            .dealer
+            .get_or_init(|| DealerManager::new(self.weak()))
+    }
+
     pub fn spclient(&self) -> &SpClient {
         self.0.spclient.get_or_init(|| SpClient::new(self.weak()))
     }
@@ -373,6 +385,14 @@ impl Session {
         self.0.data.read().user_data.clone()
     }
 
+    pub fn session_id(&self) -> String {
+        self.0.data.read().session_id.clone()
+    }
+
+    pub fn set_session_id(&self, session_id: String) {
+        self.0.data.write().session_id = session_id.to_owned();
+    }
+
     pub fn device_id(&self) -> &str {
         &self.config().device_id
     }

core/src/spclient.rs

@@ -3,20 +3,6 @@ use std::{
     time::{Duration, Instant},
 };
 
-use bytes::Bytes;
-use data_encoding::HEXUPPER_PERMISSIVE;
-use futures_util::future::IntoStream;
-use http::header::HeaderValue;
-use hyper::{
-    header::{HeaderName, ACCEPT, AUTHORIZATION, CONTENT_TYPE, RANGE},
-    HeaderMap, Method, Request,
-};
-use hyper_util::client::legacy::ResponseFuture;
-use protobuf::{Enum, Message, MessageFull};
-use rand::RngCore;
-use sysinfo::System;
-use thiserror::Error;
-
 use crate::config::{os_version, OS};
 use crate::{
     apresolve::SocketAddress,
@@ -37,6 +23,20 @@ use crate::{
     version::spotify_semantic_version,
     Error, FileId, SpotifyId,
 };
+use bytes::Bytes;
+use data_encoding::HEXUPPER_PERMISSIVE;
+use futures_util::future::IntoStream;
+use http::header::HeaderValue;
+use hyper::{
+    header::{HeaderName, ACCEPT, AUTHORIZATION, CONTENT_TYPE, RANGE},
+    HeaderMap, Method, Request,
+};
+use hyper_util::client::legacy::ResponseFuture;
+use librespot_protocol::{autoplay_context_request::AutoplayContextRequest, player::Context};
+use protobuf::{Enum, Message, MessageFull};
+use rand::RngCore;
+use sysinfo::System;
+use thiserror::Error;
 
 component! {
     SpClient : SpClientInner {
@@ -50,11 +50,20 @@ pub type SpClientResult = Result<Bytes, Error>;
 
 #[allow(clippy::declare_interior_mutable_const)]
 pub const CLIENT_TOKEN: HeaderName = HeaderName::from_static("client-token");
+#[allow(clippy::declare_interior_mutable_const)]
+const CONNECTION_ID: HeaderName = HeaderName::from_static("x-spotify-connection-id");
+
+const NO_METRICS_AND_SALT: RequestOptions = RequestOptions {
+    metrics: false,
+    salt: false,
+};
 
 #[derive(Debug, Error)]
 pub enum SpClientError {
     #[error("missing attribute {0}")]
     Attribute(String),
+    #[error("expected data but received none")]
+    NoData,
 }
 
 impl From<SpClientError> for Error {
@@ -75,6 +84,20 @@ impl Default for RequestStrategy {
     }
 }
 
+pub struct RequestOptions {
+    metrics: bool,
+    salt: bool,
+}
+
+impl Default for RequestOptions {
+    fn default() -> Self {
+        Self {
+            metrics: true,
+            salt: true,
+        }
+    }
+}
+
 impl SpClient {
     pub fn set_strategy(&self, strategy: RequestStrategy) {
         self.lock(|inner| inner.strategy = strategy)
@@ -354,7 +377,25 @@ impl SpClient {
         headers: Option<HeaderMap>,
         message: &M,
     ) -> SpClientResult {
-        let body = protobuf::text_format::print_to_string(message);
+        self.request_with_protobuf_and_options(
+            method,
+            endpoint,
+            headers,
+            message,
+            &Default::default(),
+        )
+        .await
+    }
+
+    pub async fn request_with_protobuf_and_options<M: Message + MessageFull>(
+        &self,
+        method: &Method,
+        endpoint: &str,
+        headers: Option<HeaderMap>,
+        message: &M,
+        options: &RequestOptions,
+    ) -> SpClientResult {
+        let body = message.write_to_bytes()?;
 
         let mut headers = headers.unwrap_or_default();
         headers.insert(
@@ -362,7 +403,7 @@ impl SpClient {
             HeaderValue::from_static("application/x-protobuf"),
         );
 
-        self.request(method, endpoint, Some(headers), Some(&body))
+        self.request_with_options(method, endpoint, Some(headers), Some(&body), options)
             .await
     }
 
@@ -376,7 +417,8 @@ impl SpClient {
         let mut headers = headers.unwrap_or_default();
         headers.insert(ACCEPT, HeaderValue::from_static("application/json"));
 
-        self.request(method, endpoint, Some(headers), body).await
+        self.request(method, endpoint, Some(headers), body.map(|s| s.as_bytes()))
+            .await
     }
 
     pub async fn request(
@@ -384,7 +426,19 @@ impl SpClient {
         method: &Method,
         endpoint: &str,
         headers: Option<HeaderMap>,
-        body: Option<&str>,
+        body: Option<&[u8]>,
+    ) -> SpClientResult {
+        self.request_with_options(method, endpoint, headers, body, &Default::default())
+            .await
+    }
+
+    pub async fn request_with_options(
+        &self,
+        method: &Method,
+        endpoint: &str,
+        headers: Option<HeaderMap>,
+        body: Option<&[u8]>,
+        options: &RequestOptions,
     ) -> SpClientResult {
         let mut tries: usize = 0;
         let mut last_response;
@@ -399,31 +453,33 @@ impl SpClient {
             let mut url = self.base_url().await?;
             url.push_str(endpoint);
 
-            let separator = match url.find('?') {
-                Some(_) => "&",
-                None => "?",
-            };
-
             // Add metrics. There is also an optional `partner` key with a value like
             // `vodafone-uk` but we've yet to discover how we can find that value.
             // For the sake of documentation you could also do "product=free" but
             // we only support premium anyway.
+            if options.metrics && !url.contains("product=0") {
                 let _ = write!(
                     url,
                     "{}product=0&country={}",
-                separator,
+                    util::get_next_query_separator(&url),
                     self.session().country()
                 );
+            }
 
             // Defeat caches. Spotify-generated URLs already contain this.
-            if !url.contains("salt=") {
+            if options.salt && !url.contains("salt=") {
-                let _ = write!(url, "&salt={}", rand::thread_rng().next_u32());
+                let _ = write!(
+                    url,
+                    "{}salt={}",
+                    util::get_next_query_separator(&url),
+                    rand::thread_rng().next_u32()
+                );
             }
 
             let mut request = Request::builder()
                 .method(method)
                 .uri(url)
-                .body(body.to_owned().into())?;
+                .body(Bytes::copy_from_slice(body))?;
 
             // Reconnection logic: keep getting (cached) tokens because they might have expired.
             let token = self.session().login5().auth_token().await?;
@@ -481,20 +537,34 @@ impl SpClient {
         last_response
     }
 
-    pub async fn put_connect_state(
+    pub async fn put_connect_state_request(&self, state: &PutStateRequest) -> SpClientResult {
-        &self,
-        connection_id: &str,
-        state: &PutStateRequest,
-    ) -> SpClientResult {
         let endpoint = format!("/connect-state/v1/devices/{}", self.session().device_id());
 
         let mut headers = HeaderMap::new();
-        headers.insert("X-Spotify-Connection-Id", connection_id.parse()?);
+        headers.insert(CONNECTION_ID, self.session().connection_id().parse()?);
 
         self.request_with_protobuf(&Method::PUT, &endpoint, Some(headers), state)
             .await
     }
 
+    pub async fn delete_connect_state_request(&self) -> SpClientResult {
+        let endpoint = format!("/connect-state/v1/devices/{}", self.session().device_id());
+        self.request(&Method::DELETE, &endpoint, None, None).await
+    }
+
+    pub async fn put_connect_state_inactive(&self, notify: bool) -> SpClientResult {
+        let endpoint = format!(
+            "/connect-state/v1/devices/{}/inactive?notify={notify}",
+            self.session().device_id()
+        );
+
+        let mut headers = HeaderMap::new();
+        headers.insert(CONNECTION_ID, self.session().connection_id().parse()?);
+
+        self.request(&Method::PUT, &endpoint, Some(headers), None)
+            .await
+    }
+
     pub async fn get_metadata(&self, scope: &str, id: &SpotifyId) -> SpClientResult {
         let endpoint = format!("/metadata/4/{}/{}", scope, id.to_base16()?);
         self.request(&Method::GET, &endpoint, None, None).await
@@ -738,4 +808,76 @@ impl SpClient {
 
         self.request_url(&url).await
     }
+
+    /// Request the context for an uri
+    ///
+    /// ## Query entry found in the wild:
+    /// - include_video=true
+    /// ## Remarks:
+    /// - track
+    ///   - returns a single page with a single track
+    ///   - when requesting a single track with a query in the request, the returned track uri
+    ///     **will** contain the query
+    /// - artists
+    ///   - returns 2 pages with tracks: 10 most popular tracks and latest/popular album
+    ///   - remaining pages are albums of the artists and are only provided as page_url
+    /// - search
+    ///   - is massively influenced by the provided query
+    ///   - the query result shown by the search expects no query at all
+    ///   - uri looks like "spotify:search:never+gonna"
+    pub async fn get_context(&self, uri: &str) -> Result<Context, Error> {
+        let uri = format!("/context-resolve/v1/{uri}");
+
+        let res = self
+            .request_with_options(&Method::GET, &uri, None, None, &NO_METRICS_AND_SALT)
+            .await?;
+        let ctx_json = String::from_utf8(res.to_vec())?;
+        if ctx_json.is_empty() {
+            Err(SpClientError::NoData)?
+        }
+
+        let ctx = protobuf_json_mapping::parse_from_str::<Context>(&ctx_json);
+
+        if ctx.is_err() {
+            trace!("failed parsing context: {ctx_json}")
+        }
+
+        Ok(ctx?)
+    }
+
+    pub async fn get_autoplay_context(
+        &self,
+        context_request: &AutoplayContextRequest,
+    ) -> Result<Context, Error> {
+        let res = self
+            .request_with_protobuf_and_options(
+                &Method::POST,
+                "/context-resolve/v1/autoplay",
+                None,
+                context_request,
+                &NO_METRICS_AND_SALT,
+            )
+            .await?;
+
+        let ctx_json = String::from_utf8(res.to_vec())?;
+        if ctx_json.is_empty() {
+            Err(SpClientError::NoData)?
+        }
+
+        let ctx = protobuf_json_mapping::parse_from_str::<Context>(&ctx_json);
+
+        if ctx.is_err() {
+            trace!("failed parsing context: {ctx_json}")
+        }
+
+        Ok(ctx?)
+    }
+
+    pub async fn get_rootlist(&self, from: usize, length: Option<usize>) -> SpClientResult {
+        let length = length.unwrap_or(120);
+        let user = self.session().username();
+        let endpoint = format!("/playlist/v2/user/{user}/rootlist?decorate=revision,attributes,length,owner,capabilities,status_code&from={from}&length={length}");
+
+        self.request(&Method::GET, &endpoint, None, None).await
+    }
 }

core/src/spotify_id.rs

@@ -423,19 +423,6 @@ impl TryFrom<&Vec<u8>> for SpotifyId {
     }
 }
 
-impl TryFrom<&protocol::spirc::TrackRef> for SpotifyId {
-    type Error = crate::Error;
-    fn try_from(track: &protocol::spirc::TrackRef) -> Result<Self, Self::Error> {
-        match SpotifyId::from_raw(track.gid()) {
-            Ok(mut id) => {
-                id.item_type = SpotifyItemType::Track;
-                Ok(id)
-            }
-            Err(_) => SpotifyId::from_uri(track.uri()),
-        }
-    }
-}
-
 impl TryFrom<&protocol::metadata::Album> for SpotifyId {
     type Error = crate::Error;
     fn try_from(album: &protocol::metadata::Album) -> Result<Self, Self::Error> {

core/src/util.rs

@@ -165,3 +165,10 @@ pub fn solve_hash_cash(
 
     Ok(now.elapsed())
 }
+
+pub fn get_next_query_separator(url: &str) -> &'static str {
+    match url.find('?') {
+        Some(_) => "&",
+        None => "?",
+    }
+}

core/src/version.rs

@@ -25,6 +25,9 @@ pub const SPOTIFY_SEMANTIC_VERSION: &str = "1.2.31.1205.g4d59ad7c";
 /// The protocol version of the Spotify mobile app.
 pub const SPOTIFY_MOBILE_VERSION: &str = "8.6.84";
 
+/// The general spirc version
+pub const SPOTIFY_SPIRC_VERSION: &str = "3.2.6";
+
 /// The user agent to fall back to, if one could not be determined dynamically.
 pub const FALLBACK_USER_AGENT: &str = "Spotify/117300517 Linux/0 (librespot)";
 

docs/dealer.md

@@ -0,0 +1,79 @@
+# Dealer
+
+When talking about the dealer, we are speaking about a websocket that represents the player as
+spotify-connect device. The dealer is primarily used to receive updates and not to update the
+state.
+
+## Messages and Requests
+
+There are two types of messages that are received via the dealer, Messages and Requests.
+Messages are fire-and-forget and don't need a responses, while request expect a reply if the
+request was processed successfully or failed.
+
+Because we publish our device with support for gzip, the message payload might be BASE64 encoded
+and gzip compressed. If that is the case, the related headers send an entry for "Transfer-Encoding"
+with the value of "gzip".
+
+### Messages
+
+Most messages librespot handles send bytes that can be easily converted into their respective
+protobuf definition. Some outliers send json that can be usually mapped to an existing protobuf
+definition. We use `protobuf-json-mapping` to a similar protobuf definition
+
+> Note: The json sometimes doesn't map exactly and can provide more fields than the protobuf
+> definition expects. For messages, we usually ignore unknown fields.
+
+There are two types of messages, "informational" and "fire and forget commands".
+
+**Informational:**
+
+Informational messages send any changes done by the current user or of a client where the current user
+is logged in. These messages contain for example changes to a own playlist, additions to the liked songs
+or any update that a client sends.
+
+**Fire and Forget commands:**
+
+These are messages that send information that are requests to the current player. These are only send to
+the active player. Volume update requests and the logout request are send as fire-forget-commands.
+
+### Requests
+
+The request payload is sent as json. There are almost usable protobuf definitions (see
+files named like `es_<command in snakecase>(_request).proto`) for the commands, but they don't
+align up with the expected values and are missing some major information we need for handling some
+commands. Because of that we have our own model for the specific commands, see
+[core/src/dealer/protocol/request.rs](../core/src/dealer/protocol/request.rs).
+
+All request modify the player-state.
+
+## Details
+
+This sections is for details and special hiccups in regards to handling that isn't completely intuitive.
+
+### UIDs
+
+A spotify item is identifiable by their uri. The `ContextTrack` and `ProvidedTrack` both have a `uid` 
+field. When we receive a context via the `context-resolver` it can return items (`ContextTrack`) that
+may have their respective uid set. Some context like the collection and albums don't provide this 
+information.
+
+When a `uid` is missing, resorting the next tracks in an official client gets confused and sends 
+incorrect data via the `set_queue` request. To prevent this behavior we generate a uid for each 
+track that doesn't have an uid. Queue items become a "queue-uid" which is just a `q` with an 
+incrementing number.
+
+### Metadata
+
+For some client's (especially mobile) the metadata of a track is very important to display the 
+context correct. For example the "autoplay" metadata is relevant to display the correct context 
+info.
+
+Metadata can also be used to store data like the iteration when repeating a context.
+
+### Repeat
+
+The context repeating implementation is partly mimicked from the official client. The official 
+client allows skipping into negative iterations, this is currently not supported.
+
+Repeating is realized by filling the next tracks with multiple contexts separated by delimiters.
+By that we only have to handle the delimiter when skipping to the next and previous track.

examples/play_connect.rs

@@ -9,13 +9,13 @@ use librespot::{
         player::Player,
     },
 };
+use librespot_connect::spirc::PlayingTrack;
 use librespot_connect::{
-    config::ConnectConfig,
     spirc::{Spirc, SpircLoadCommand},
+    state::ConnectStateConfig,
 };
 use librespot_metadata::{Album, Metadata};
 use librespot_playback::mixer::{softmixer::SoftMixer, Mixer, MixerConfig};
-use librespot_protocol::spirc::TrackRef;
 use std::env;
 use std::sync::Arc;
 use tokio::join;
@@ -25,7 +25,7 @@ async fn main() {
     let session_config = SessionConfig::default();
     let player_config = PlayerConfig::default();
     let audio_format = AudioFormat::default();
-    let connect_config = ConnectConfig::default();
+    let connect_config = ConnectStateConfig::default();
 
     let mut args: Vec<_> = env::args().collect();
     let context_uri = if args.len() == 3 {
@@ -64,14 +64,6 @@ async fn main() {
         let album = Album::get(&session, &SpotifyId::from_uri(&context_uri).unwrap())
             .await
             .unwrap();
-        let tracks = album
-            .tracks()
-            .map(|track_id| {
-                let mut track = TrackRef::new();
-                track.set_gid(Vec::from(track_id.to_raw()));
-                track
-            })
-            .collect();
 
         println!(
             "Playing album: {} by {}",
@@ -87,10 +79,12 @@ async fn main() {
             .load(SpircLoadCommand {
                 context_uri,
                 start_playing: true,
+                seek_to: 0,
                 shuffle: false,
                 repeat: false,
-                playing_track_index: 0, // the index specifies which track in the context starts playing, in this case the first in the album
+                repeat_track: false,
-                tracks,
+                // the index specifies which track in the context starts playing, in this case the first in the album
+                playing_track: PlayingTrack::Index(0),
             })
             .unwrap();
     });

playback/src/audio_backend/portaudio.rs

@@ -94,7 +94,7 @@ impl<'a> Open for PortAudioSink<'a> {
     }
 }
 
-impl<'a> Sink for PortAudioSink<'a> {
+impl Sink for PortAudioSink<'_> {
     fn start(&mut self) -> SinkResult<()> {
         macro_rules! start_sink {
             (ref mut $stream: ident, ref $parameters: ident) => {{
@@ -175,12 +175,12 @@ impl<'a> Sink for PortAudioSink<'a> {
     }
 }
 
-impl<'a> Drop for PortAudioSink<'a> {
+impl Drop for PortAudioSink<'_> {
     fn drop(&mut self) {
         portaudio_rs::terminate().unwrap();
     }
 }
 
-impl<'a> PortAudioSink<'a> {
+impl PortAudioSink<'_> {
     pub const NAME: &'static str = "portaudio";
 }

playback/src/audio_backend/rodio.rs

@@ -145,7 +145,7 @@ fn create_sink(
         },
         Some(device_name) => {
             host.output_devices()?
-                .find(|d| d.name().ok().map_or(false, |name| name == device_name)) // Ignore devices for which getting name fails
+                .find(|d| d.name().ok().is_some_and(|name| name == device_name)) // Ignore devices for which getting name fails
                 .ok_or_else(|| RodioError::DeviceNotAvailable(device_name.to_string()))?
         }
         None => host

playback/src/player.rs

@@ -123,7 +123,10 @@ enum PlayerCommand {
     },
     EmitFilterExplicitContentChangedEvent(bool),
     EmitShuffleChangedEvent(bool),
-    EmitRepeatChangedEvent(bool),
+    EmitRepeatChangedEvent {
+        context: bool,
+        track: bool,
+    },
     EmitAutoPlayChangedEvent(bool),
 }
 
@@ -218,7 +221,8 @@ pub enum PlayerEvent {
         shuffle: bool,
     },
     RepeatChanged {
-        repeat: bool,
+        context: bool,
+        track: bool,
     },
     AutoPlayChanged {
         auto_play: bool,
@@ -607,8 +611,8 @@ impl Player {
         self.command(PlayerCommand::EmitShuffleChangedEvent(shuffle));
     }
 
-    pub fn emit_repeat_changed_event(&self, repeat: bool) {
+    pub fn emit_repeat_changed_event(&self, context: bool, track: bool) {
-        self.command(PlayerCommand::EmitRepeatChangedEvent(repeat));
+        self.command(PlayerCommand::EmitRepeatChangedEvent { context, track });
     }
 
     pub fn emit_auto_play_changed_event(&self, auto_play: bool) {
@@ -2104,8 +2108,8 @@ impl PlayerInternal {
                 self.send_event(PlayerEvent::VolumeChanged { volume })
             }
 
-            PlayerCommand::EmitRepeatChangedEvent(repeat) => {
+            PlayerCommand::EmitRepeatChangedEvent { context, track } => {
-                self.send_event(PlayerEvent::RepeatChanged { repeat })
+                self.send_event(PlayerEvent::RepeatChanged { context, track })
             }
 
             PlayerCommand::EmitShuffleChangedEvent(shuffle) => {
@@ -2336,9 +2340,10 @@ impl fmt::Debug for PlayerCommand {
                 .debug_tuple("EmitShuffleChangedEvent")
                 .field(&shuffle)
                 .finish(),
-            PlayerCommand::EmitRepeatChangedEvent(repeat) => f
+            PlayerCommand::EmitRepeatChangedEvent { context, track } => f
                 .debug_tuple("EmitRepeatChangedEvent")
-                .field(&repeat)
+                .field(&context)
+                .field(&track)
                 .finish(),
             PlayerCommand::EmitAutoPlayChangedEvent(auto_play) => f
                 .debug_tuple("EmitAutoPlayChangedEvent")

protocol/build.rs

@@ -37,6 +37,8 @@ fn compile() {
         proto_dir.join("spotify/login5/v3/user_info.proto"),
         proto_dir.join("storage-resolve.proto"),
         proto_dir.join("user_attributes.proto"),
+        proto_dir.join("autoplay_context_request.proto"),
+        proto_dir.join("social_connect_v2.proto"),
         // TODO: remove these legacy protobufs when we are on the new API completely
         proto_dir.join("authentication.proto"),
         proto_dir.join("canvaz.proto"),
@@ -45,7 +47,6 @@ fn compile() {
         proto_dir.join("keyexchange.proto"),
         proto_dir.join("mercury.proto"),
         proto_dir.join("pubsub.proto"),
-        proto_dir.join("spirc.proto"),
     ];
 
     let slices = files.iter().map(Deref::deref).collect::<Vec<_>>();

src/main.rs

@@ -1,7 +1,3 @@
-use data_encoding::HEXLOWER;
-use futures_util::StreamExt;
-use log::{debug, error, info, trace, warn};
-use sha1::{Digest, Sha1};
 use std::{
     env,
     fs::create_dir_all,
@@ -12,12 +8,13 @@ use std::{
     str::FromStr,
     time::{Duration, Instant},
 };
-use sysinfo::{ProcessesToUpdate, System};
-use thiserror::Error;
-use url::Url;
 
+use data_encoding::HEXLOWER;
+use futures_util::StreamExt;
+#[cfg(feature = "alsa-backend")]
+use librespot::playback::mixer::alsamixer::AlsaMixer;
 use librespot::{
-    connect::{config::ConnectConfig, spirc::Spirc},
+    connect::{spirc::Spirc, state::ConnectStateConfig},
     core::{
         authentication::Credentials, cache::Cache, config::DeviceType, version, Session,
         SessionConfig,
@@ -33,9 +30,11 @@ use librespot::{
         player::{coefficient_to_duration, duration_to_coefficient, Player},
     },
 };
-
+use log::{debug, error, info, trace, warn};
-#[cfg(feature = "alsa-backend")]
+use sha1::{Digest, Sha1};
-use librespot::playback::mixer::alsamixer::AlsaMixer;
+use sysinfo::{ProcessesToUpdate, System};
+use thiserror::Error;
+use url::Url;
 
 mod player_event_handler;
 use player_event_handler::{run_program_on_sink_events, EventHandler};
@@ -208,7 +207,7 @@ struct Setup {
     cache: Option<Cache>,
     player_config: PlayerConfig,
     session_config: SessionConfig,
-    connect_config: ConnectConfig,
+    connect_config: ConnectStateConfig,
     mixer_config: MixerConfig,
     credentials: Option<Credentials>,
     enable_oauth: bool,
@@ -1371,7 +1370,7 @@ fn get_setup() -> Setup {
     });
 
     let connect_config = {
-        let connect_default_config = ConnectConfig::default();
+        let connect_default_config = ConnectStateConfig::default();
 
         let name = opt_str(NAME).unwrap_or_else(|| connect_default_config.name.clone());
 
@@ -1431,14 +1430,11 @@ fn get_setup() -> Setup {
                         #[cfg(feature = "alsa-backend")]
                         let default_value = &format!(
                             "{}, or the current value when the alsa mixer is used.",
-                            connect_default_config.initial_volume.unwrap_or_default()
+                            connect_default_config.initial_volume
                         );
 
                         #[cfg(not(feature = "alsa-backend"))]
-                        let default_value = &connect_default_config
+                        let default_value = &connect_default_config.initial_volume.to_string();
-                            .initial_volume
-                            .unwrap_or_default()
-                            .to_string();
 
                         invalid_error_msg(
                             INITIAL_VOLUME,
@@ -1485,14 +1481,21 @@ fn get_setup() -> Setup {
 
         let is_group = opt_present(DEVICE_IS_GROUP);
 
-        let has_volume_ctrl = !matches!(mixer_config.volume_ctrl, VolumeCtrl::Fixed);
+        if let Some(initial_volume) = initial_volume {
-
+            ConnectStateConfig {
-        ConnectConfig {
                 name,
                 device_type,
                 is_group,
-            initial_volume,
+                initial_volume: initial_volume.into(),
-            has_volume_ctrl,
+                ..Default::default()
+            }
+        } else {
+            ConnectStateConfig {
+                name,
+                device_type,
+                is_group,
+                ..Default::default()
+            }
         }
     };
 

src/player_event_handler.rs

@@ -226,9 +226,10 @@ impl EventHandler {
                             env_vars.insert("PLAYER_EVENT", "shuffle_changed".to_string());
                             env_vars.insert("SHUFFLE", shuffle.to_string());
                         }
-                        PlayerEvent::RepeatChanged { repeat } => {
+                        PlayerEvent::RepeatChanged { context, track } => {
                             env_vars.insert("PLAYER_EVENT", "repeat_changed".to_string());
-                            env_vars.insert("REPEAT", repeat.to_string());
+                            env_vars.insert("REPEAT", context.to_string());
+                            env_vars.insert("REPEAT_TRACK", track.to_string());
                         }
                         PlayerEvent::AutoPlayChanged { auto_play } => {
                             env_vars.insert("PLAYER_EVENT", "auto_play_changed".to_string());