import "playlist4content.proto";
import "playlist4meta.proto";

message Add {
  optional int32 fromIndex = 1;
  repeated Item items = 2;
  optional ListChecksum list_checksum = 3;
  optional bool addLast = 4;
  optional bool addFirst = 5;
}
message Rem {
  optional int32 fromIndex = 1;
  optional int32 length = 2;
  repeated Item items = 3;
  optional ListChecksum list_checksum = 4;
  optional ListChecksum items_checksum = 5;
  optional ListChecksum uris_checksum = 6;
  optional bool itemsAsKey = 7;
}
message Mov {
  required int32 fromIndex = 1;
  required int32 length = 2;
  required int32 toIndex = 3;
  optional ListChecksum list_checksum = 4;
  optional ListChecksum items_checksum = 5;
  optional ListChecksum uris_checksum = 6;
}
message ItemAttributesPartialState {
  required ItemAttributes values = 1;
  repeated ItemAttributeKind no_value = 2;
}
message ListAttributesPartialState {
  required ListAttributes values = 1;
  repeated ListAttributeKind no_value = 2;
}
message UpdateItemAttributes {
  required int32 index = 1;
  required ItemAttributesPartialState new_attributes = 2;
  optional ItemAttributesPartialState old_attributes = 3;
  optional ListChecksum list_checksum = 4;
  optional ListChecksum old_attributes_checksum = 5;
}
message UpdateListAttributes {
  required ListAttributesPartialState new_attributes = 1;
  optional ListAttributesPartialState old_attributes = 2;
  optional ListChecksum list_checksum = 3;
  optional ListChecksum old_attributes_checksum = 4;
}
message Op {
  enum Kind {
    KIND_UNKNOWN = 0;
    ADD = 2;
    REM = 3;
    MOV = 4;
    UPDATE_ITEM_ATTRIBUTES = 5;
    UPDATE_LIST_ATTRIBUTES = 6;
  };
  required Kind kind = 1;
  optional Add add = 2;
  optional Rem rem = 3;
  optional Mov mov = 4;
  optional UpdateItemAttributes update_item_attributes = 5;
  optional UpdateListAttributes update_list_attributes = 6;
}

message OpList {
  repeated Op ops = 1;
}