music-assistant-server

1"""Sync Group Player implementation."""
2
3from __future__ import annotations
4
5import asyncio
6from typing import TYPE_CHECKING, cast
7
8from music_assistant_models.config_entries import ConfigEntry, ConfigValueOption, ConfigValueType
9from music_assistant_models.enums import ConfigEntryType, PlaybackState, PlayerFeature, PlayerType
10from music_assistant_models.errors import UnsupportedFeaturedException
11from propcache import under_cached_property as cached_property
12
13from music_assistant.constants import (
14    APPLICATION_NAME,
15    CONF_DYNAMIC_GROUP_MEMBERS,
16    CONF_GROUP_MEMBERS,
17)
18from music_assistant.models.player import DeviceInfo, Player, PlayerMedia
19
20from .constants import CONF_ENTRY_SGP_NOTE, EXTRA_FEATURES_FROM_MEMBERS
21
22if TYPE_CHECKING:
23    from .provider import SyncGroupProvider
24
25
26class SyncGroupPlayer(Player):
27    """Sync Group Player implementation."""
28
29    _attr_type: PlayerType = PlayerType.GROUP
30    sync_leader: Player | None = None
31    """The active sync leader player for this syncgroup."""
32
33    def __init__(
34        self,
35        provider: SyncGroupProvider,
36        player_id: str,
37    ) -> None:
38        """Initialize SyncGroupPlayer instance."""
39        super().__init__(provider, player_id)
40        self._attr_name = self.config.name or self.config.default_name or f"SyncGroup {player_id}"
41        self._attr_available = True
42        self._attr_device_info = DeviceInfo(model=provider.name, manufacturer=APPLICATION_NAME)
43        # Allow grouping with any player that supports syncing
44        # The actual compatibility is checked via can_group_with on each player
45        self._attr_can_group_with = set()
46
47    @cached_property
48    def is_dynamic(self) -> bool:
49        """Return if the player is a dynamic group player."""
50        return bool(self.config.get_value(CONF_DYNAMIC_GROUP_MEMBERS, False))
51
52    @cached_property
53    def synced_to(self) -> str | None:
54        """Return the id of the player this player is synced to (sync leader)."""
55        # groups can't be synced
56        return None
57
58    async def on_config_updated(self) -> None:
59        """Handle logic when the PlayerConfig is first loaded or updated."""
60        # Config is only available after the player was registered
61        self._cache.clear()  # clear to prevent loading old is_dynamic
62        default_members = cast("list[str]", self.config.get_value(CONF_GROUP_MEMBERS, []))
63        if self.is_dynamic:
64            self._attr_static_group_members = []
65            self._attr_supported_features.add(PlayerFeature.SET_MEMBERS)
66        else:
67            self._attr_static_group_members = default_members.copy()
68            self._attr_supported_features.discard(PlayerFeature.SET_MEMBERS)
69        self._attr_group_members = default_members.copy()
70
71    @cached_property
72    def supported_features(self) -> set[PlayerFeature]:
73        """Return the supported features of the player."""
74        # by default we don't have any features, except play_media
75        # but we can gain some features based on the capabilities of the sync leader
76        # set_members is only supported if it's a dynamic group
77        base_features: set[PlayerFeature] = {PlayerFeature.PLAY_MEDIA}
78        if self.is_dynamic:
79            base_features.add(PlayerFeature.SET_MEMBERS)
80        if not self.sync_leader:
81            return base_features
82        # add features supported by the sync leader
83        for feature in EXTRA_FEATURES_FROM_MEMBERS:
84            if feature in self.sync_leader.state.supported_features:
85                base_features.add(feature)
86        return base_features
87
88    @property
89    def playback_state(self) -> PlaybackState:
90        """Return the current playback state of the player."""
91        return self.sync_leader.state.playback_state if self.sync_leader else PlaybackState.IDLE
92
93    @property
94    def requires_flow_mode(self) -> bool:
95        """Return if the player needs flow mode."""
96        if leader := self.sync_leader:
97            return leader.flow_mode
98        return False
99
100    @property
101    def elapsed_time(self) -> float | None:
102        """Return the elapsed time in (fractional) seconds of the current track (if any)."""
103        return self.sync_leader.state.elapsed_time if self.sync_leader else None
104
105    @property
106    def elapsed_time_last_updated(self) -> float | None:
107        """Return when the elapsed time was last updated."""
108        return self.sync_leader.state.elapsed_time_last_updated if self.sync_leader else None
109
110    @property
111    def can_group_with(self) -> set[str]:
112        """Return the id's of players this player can group with."""
113        if not self.is_dynamic:
114            # in case of static members,
115            # we can only group with the players defined in the config, so we return those directly
116            return set(self._attr_static_group_members)
117        # if we already have a sync leader, we use its can_group_with as reference
118        if self.sync_leader:
119            return {self.sync_leader.player_id, *self.sync_leader.state.can_group_with}
120        # If we have no members, but we do have default members in the config,
121        # we can group with players that are compatible with those
122        default_members = cast("list[str]", self.config.get_value(CONF_GROUP_MEMBERS, []))
123        for member_id in default_members:
124            member_player = self.mass.players.get_player(member_id)
125            if member_player and member_player.state.available:
126                return {*default_members, *member_player.state.can_group_with}
127        # Dynamic groups can potentially group with any compatible players
128        # Actual compatibility is validated when adding members
129        temp_can_group_with = set()
130        for player in self.mass.players.all_players(return_unavailable=False):
131            if not player.available or player.type == PlayerType.GROUP:
132                # let's avoid showing group players as options to group with
133                continue
134            if (
135                PlayerFeature.SET_MEMBERS in player.state.supported_features
136                and player.state.can_group_with
137                and not player.state.active_group
138            ):
139                temp_can_group_with.add(player.player_id)
140        return temp_can_group_with
141
142    async def get_config_entries(
143        self,
144        action: str | None = None,
145        values: dict[str, ConfigValueType] | None = None,
146    ) -> list[ConfigEntry]:
147        """Return all (provider/player specific) Config Entries for the given player (if any)."""
148        entries: list[ConfigEntry] = [
149            # syncgroup specific entries
150            CONF_ENTRY_SGP_NOTE,
151            ConfigEntry(
152                key=CONF_GROUP_MEMBERS,
153                type=ConfigEntryType.STRING,
154                multi_value=True,
155                label="Group members",
156                default_value=[],
157                description="Select all players you want to be part of this sync group. "
158                "Only compatible players (based on their sync protocol) can be grouped together.",
159                required=False,  # needed for dynamic members (which allows empty members list)
160                options=[
161                    ConfigValueOption(x.display_name, x.player_id)
162                    for x in self.mass.players.all_players(True, False)
163                    if x.type != PlayerType.GROUP
164                ],
165            ),
166            ConfigEntry(
167                key=CONF_DYNAMIC_GROUP_MEMBERS,
168                type=ConfigEntryType.BOOLEAN,
169                label="Enable dynamic members",
170                description="Allow (un)joining members dynamically, so the group more or less "
171                "behaves the same like manually syncing players together, "
172                "with the main difference being that the group player will hold the queue.",
173                default_value=False,
174                required=False,
175            ),
176        ]
177        return entries
178
179    async def stop(self) -> None:
180        """Send STOP command to given player."""
181        self._attr_current_media = None
182        if sync_leader := self.sync_leader:
183            # Use internal handler to bypass group redirect logic and avoid infinite loop
184            # (sync_leader is part of this group, so redirect would loop back here)
185            await self.mass.players._handle_cmd_stop(sync_leader.player_id)
186        # dissolve the sync group since we stopped playback
187        self.mass.call_later(
188            5, self._dissolve_syncgroup, task_id=f"syncgroup_dissolve_{self.player_id}"
189        )
190
191    async def play(self) -> None:
192        """Send PLAY (unpause) command to given player."""
193        await self.mass.players.cmd_resume(
194            self.player_id, self._attr_active_source, self._attr_current_media
195        )
196
197    async def play_media(self, media: PlayerMedia) -> None:
198        """Handle PLAY MEDIA on given player."""
199        self._attr_current_media = media
200        self._attr_active_source = media.source_id if media.source_id else None
201        await self._form_syncgroup()
202        # simply forward the command to the sync leader
203        if sync_leader := self.sync_leader:
204            # Use internal handler to bypass group redirect logic and preserve protocol selection
205            await self.mass.players._handle_play_media(sync_leader.player_id, media)
206            self.update_state()
207        else:
208            raise RuntimeError("An empty group cannot play media, consider adding members first")
209
210    async def enqueue_next_media(self, media: PlayerMedia) -> None:
211        """Handle enqueuing of a next media item on the player."""
212        if sync_leader := self.sync_leader:
213            if PlayerFeature.ENQUEUE not in sync_leader.state.supported_features:
214                # this may happen in race conditions where we just switched sync leaders
215                # and the new leader doesn't support enqueueing next media.
216                return
217            # Use internal handler to bypass group redirect logic and avoid infinite loop
218            await self.mass.players._handle_enqueue_next_media(sync_leader.player_id, media)
219
220    async def set_members(
221        self,
222        player_ids_to_add: list[str] | None = None,
223        player_ids_to_remove: list[str] | None = None,
224    ) -> None:
225        """Handle SET_MEMBERS command on the player."""
226        if not self.is_dynamic:
227            raise UnsupportedFeaturedException(
228                f"Group {self.display_name} does not allow dynamically adding/removing members!"
229            )
230        prev_leader = self.sync_leader
231        was_playing = self.playback_state == PlaybackState.PLAYING
232        needs_restart = False
233        if prev_leader and prev_leader.player_id in (player_ids_to_remove or []):
234            # We're removing the current sync leader while the group is active
235            # We need to select a new leader before we can handle the member changes
236            self.logger.debug(
237                "Removing current sync leader %s from group %s while it is active, "
238                "selecting a new leader and dissolving the current syncgroup",
239                prev_leader.display_name,
240                self.display_name,
241            )
242            if was_playing:
243                await self.mass.players._handle_cmd_stop(prev_leader.player_id)
244                await asyncio.sleep(1)
245            await self._dissolve_syncgroup()
246            await asyncio.sleep(2)
247            needs_restart = was_playing
248
249        cur_leader = self._select_sync_leader(new_members=player_ids_to_add)
250        # handle additions
251        final_players_to_add: list[str] = []
252        can_group_with = cur_leader.state.can_group_with.copy() if cur_leader else set()
253        for member_id in player_ids_to_add or []:
254            if member_id == self.player_id:
255                continue  # can not add self as member
256            member = self.mass.players.get_player(member_id)
257            if member is None or not member.available:
258                continue
259            if member_id not in self._attr_group_members:
260                self._attr_group_members.append(member_id)
261            if not cur_leader:
262                continue
263            if member_id != cur_leader.player_id and member_id not in can_group_with:
264                self.logger.debug(
265                    f"Cannot add {member.display_name} to group {self.display_name} since it's "
266                    f"not compatible with the current sync leader"
267                )
268                continue
269            if member_id != cur_leader.player_id:
270                final_players_to_add.append(member_id)
271
272        # handle removals
273        final_players_to_remove: list[str] = []
274        for member_id in player_ids_to_remove or []:
275            if member_id not in self._attr_group_members:
276                continue
277            if member_id == self.player_id:
278                raise UnsupportedFeaturedException(
279                    f"Cannot remove {self.display_name} from itself as a member!"
280                )
281            self._attr_group_members.remove(member_id)
282            final_players_to_remove.append(member_id)
283        self.update_state()
284        if needs_restart:
285            await self.play()
286            return
287        if not was_playing:
288            # Don't need to do anything else if the group is not active
289            # The syncing will be done once playback starts
290            return
291        if cur_leader:
292            await self.mass.players.cmd_set_members(
293                cur_leader.player_id,
294                player_ids_to_add=final_players_to_add,
295                player_ids_to_remove=final_players_to_remove,
296            )
297
298    async def _form_syncgroup(self) -> None:
299        """Form syncgroup by syncing all (possible) members."""
300        self.mass.cancel_timer(f"syncgroup_dissolve_{self.player_id}")
301        if not self.sync_leader:
302            self.sync_leader = self._select_sync_leader()
303
304        if not self.sync_leader:
305            # we have no members in the group, so we can't form a syncgroup
306            return
307
308        # ensure the sync leader is first in the list
309        self._attr_group_members = [
310            self.sync_leader.player_id,
311            *[x for x in self._attr_group_members if x != self.sync_leader.player_id],
312        ]
313        members_to_sync = [
314            x
315            for x in self._attr_group_members
316            if x != self.sync_leader.player_id and x not in self.sync_leader.state.group_members
317        ]
318        if members_to_sync:
319            await self.mass.players.cmd_set_members(self.sync_leader.player_id, members_to_sync)
320
321    async def _dissolve_syncgroup(self) -> None:
322        """Dissolve the current syncgroup by ungrouping all members."""
323        if sync_leader := self.sync_leader:
324            # dissolve the temporary syncgroup from the sync leader
325            sync_children = [
326                x for x in sync_leader.state.group_members if x != sync_leader.player_id
327            ]
328            if sync_children:
329                await self.mass.players.cmd_set_members(sync_leader.player_id, [], sync_children)
330        self.sync_leader = None
331        self.update_state()
332
333    def _select_sync_leader(self, new_members: list[str] | None = None) -> Player | None:
334        """Select a (new) sync leader."""
335        if self.group_members and self.sync_leader and self.sync_leader.state.available:
336            # current leader is still available, no need to select a new one
337            return self.sync_leader
338        default_members = cast("list[str]", self.config.get_value(CONF_GROUP_MEMBERS, []))
339        group_members = self.group_members or default_members or new_members or []
340        for member_id in group_members:
341            member_player = self.mass.players.get_player(member_id)
342            if member_player and member_player.state.available:
343                self.logger.debug(
344                    f"Auto-selected {member_player.display_name} as sync leader for "
345                    f"group {self.display_name}"
346                )
347                return member_player
348        return None
349