[`media.chromecast`] Full plugin rewrite.

platypush/backend/http/media/handlers/__init__.py

@@ -1,6 +1,7 @@
 from abc import ABC, abstractmethod
 import hashlib
 import logging
+import os
 from typing import Generator, Optional
 
 from platypush.message import JSONAble
@@ -56,6 +57,9 @@ class MediaHandler(JSONAble, ABC):
                 logging.exception(e)
                 errors[hndl_class.__name__] = str(e)
 
+        if os.path.exists(source):
+            source = f'file://{source}'
+
         raise AttributeError(
             f'The source {source} has no handlers associated. Errors: {errors}'
         )

platypush/backend/http/webapp/src/components/panels/Media/Players/Chromecast.vue

@@ -18,13 +18,15 @@ export default {
 
   methods: {
     async getPlayers() {
-      const devices = await this.request(`${this.pluginName}.get_chromecasts`)
+      const devices = Object.values(
+        await this.request(`${this.pluginName}.status`)
+      )
+
       return Promise.all(devices.map(async (device) => {
         return {
           ...device,
           iconClass: device.type === 'audio' ? 'fa fa-volume-up' : 'fab fa-chromecast',
           pluginName: this.pluginName,
-          status: this.request(`${this.pluginName}.status`, {chromecast: device.name}),
           component: this,
         }
       }))
@@ -41,7 +43,9 @@ export default {
     },
 
     async status(player) {
-      return await this.request(`${this.pluginName}.status`, {chromecast: this.getPlayerName(player)})
+      return (
+        await this.request(`${this.pluginName}.status`, {chromecast: this.getPlayerName(player)})
+      )?.status
     },
 
     async play(resource, player) {
@@ -76,9 +80,8 @@ export default {
       return true
     },
 
-    supports(resource) {
-      return resource?.type === 'youtube' ||
-          (resource.url || resource).startsWith('http://') || (resource.url || resource).startsWith('https://')
+    supports() {
+      return true
     },
   },
 }

platypush/message/event/media.py

@@ -2,10 +2,10 @@ from platypush.message.event import Event
 
 
 class MediaEvent(Event):
-    """ Base class for media events """
+    """Base class for media events"""
 
-    def __init__(self, player=None, plugin=None, *args, **kwargs):
-        super().__init__(player=player, plugin=plugin, *args, **kwargs)
+    def __init__(self, player=None, plugin=None, status=None, *args, **kwargs):
+        super().__init__(player=player, plugin=plugin, status=status, *args, **kwargs)
 
 
 class MediaPlayRequestEvent(MediaEvent):
@@ -13,13 +13,22 @@ class MediaPlayRequestEvent(MediaEvent):
     Event triggered when a new media playback request is received
     """
 
-    def __init__(self, player=None, plugin=None, resource=None, title=None, *args, **kwargs):
+    def __init__(
+        self, player=None, plugin=None, resource=None, title=None, *args, **kwargs
+    ):
         """
         :param resource: File name or URI of the played video
         :type resource: str
         """
 
-        super().__init__(*args, player=player, plugin=plugin, resource=resource, title=title, **kwargs)
+        super().__init__(
+            *args,
+            player=player,
+            plugin=plugin,
+            resource=resource,
+            title=title,
+            **kwargs
+        )
 
 
 class MediaPlayEvent(MediaEvent):
@@ -27,13 +36,22 @@ class MediaPlayEvent(MediaEvent):
     Event triggered when a new media content is played
     """
 
-    def __init__(self, player=None, plugin=None, resource=None, title=None, *args, **kwargs):
+    def __init__(
+        self, player=None, plugin=None, resource=None, title=None, *args, **kwargs
+    ):
         """
         :param resource: File name or URI of the played video
         :type resource: str
         """
 
-        super().__init__(*args, player=player, plugin=plugin, resource=resource, title=title, **kwargs)
+        super().__init__(
+            *args,
+            player=player,
+            plugin=plugin,
+            resource=resource,
+            title=title,
+            **kwargs
+        )
 
 
 class MediaStopEvent(MediaEvent):
@@ -69,7 +87,9 @@ class MediaSeekEvent(MediaEvent):
     """
 
     def __init__(self, position, player=None, plugin=None, *args, **kwargs):
-        super().__init__(*args, player=player, plugin=plugin, position=position, **kwargs)
+        super().__init__(
+            *args, player=player, plugin=plugin, position=position, **kwargs
+        )
 
 
 class MediaVolumeChangedEvent(MediaEvent):
@@ -101,7 +121,9 @@ class NewPlayingMediaEvent(MediaEvent):
         :type resource: str
         """
 
-        super().__init__(*args, player=player, plugin=plugin, resource=resource, **kwargs)
+        super().__init__(
+            *args, player=player, plugin=plugin, resource=resource, **kwargs
+        )
 
 
 # vim:sw=4:ts=4:et:

platypush/plugins/media/__init__.py

@@ -326,11 +326,11 @@ class MediaPlugin(Plugin, ABC):
         """
 
         if resource.startswith('file://'):
-            resource = resource[len('file://') :]
-            assert os.path.isfile(resource), f'File {resource} not found'
+            path = resource[len('file://') :]
+            assert os.path.isfile(path), f'File {path} not found'
             self._latest_resource = MediaResource(
                 resource=resource,
-                url=f'file://{resource}',
+                url=resource,
                 title=os.path.basename(resource),
                 filename=os.path.basename(resource),
             )
@@ -635,7 +635,11 @@ class MediaPlugin(Plugin, ABC):
             }
 
         """
+        return self._start_streaming(media, subtitles=subtitles, download=download)
 
+    def _start_streaming(
+        self, media: str, subtitles: Optional[str] = None, download: bool = False
+    ):
         http = get_backend('http')
         assert http, f'Unable to stream {media}: HTTP backend not configured'
 
@@ -715,6 +719,7 @@ class MediaPlugin(Plugin, ABC):
 
     @action
     def get_youtube_info(self, url):
+        # Legacy conversion for Mopidy YouTube URIs
         m = re.match('youtube:video:(.*)', url)
         if m:
             url = f'https://www.youtube.com/watch?v={m.group(1)}'
@@ -759,7 +764,7 @@ class MediaPlugin(Plugin, ABC):
                             .pop()
                             .strip(),
                         )
-                        .group(1)
+                        .group(1)  # type: ignore
                         .split(':')[::-1]
                     )
                 ],
@@ -797,7 +802,7 @@ class MediaPlugin(Plugin, ABC):
         return self._is_local
 
     @staticmethod
-    def get_subtitles_file(subtitles):
+    def get_subtitles_file(subtitles: Optional[str] = None):
         if not subtitles:
             return None
 

platypush/plugins/media/chromecast/__init__.py

@@ -1,156 +1,49 @@
-import datetime
-import re
-import time
+import threading
+from typing import Callable, Optional
 
-from platypush.context import get_bus
-from platypush.plugins import action
+import pychromecast  # type: ignore
+
+from platypush.backend.http.app.utils import get_remote_base_url
+from platypush.plugins import RunnablePlugin, action
 from platypush.plugins.media import MediaPlugin
 from platypush.utils import get_mime_type
-from platypush.message.event.media import (
-    MediaPlayEvent,
-    MediaPlayRequestEvent,
-    MediaStopEvent,
-    MediaPauseEvent,
-    NewPlayingMediaEvent,
-    MediaVolumeChangedEvent,
-    MediaSeekEvent,
-)
+from platypush.message.event.media import MediaPlayRequestEvent
+
+from ._listener import MediaListener
+from ._subtitles import SubtitlesAsyncHandler
+from ._utils import convert_status, post_event
 
 
-def convert_status(status):
-    attrs = [
-        a
-        for a in dir(status)
-        if not a.startswith('_') and not callable(getattr(status, a))
-    ]
-
-    renamed_attrs = {
-        'current_time': 'position',
-        'player_state': 'state',
-        'supports_seek': 'seekable',
-        'volume_level': 'volume',
-        'volume_muted': 'mute',
-        'content_id': 'url',
-    }
-
-    ret = {}
-    for attr in attrs:
-        value = getattr(status, attr)
-        if attr == 'volume_level':
-            value *= 100
-        if attr == 'player_state':
-            value = value.lower()
-            if value == 'paused':
-                value = 'pause'
-            if value == 'playing':
-                value = 'play'
-        if isinstance(value, datetime.datetime):
-            value = value.isoformat()
-
-        if attr in renamed_attrs:
-            ret[renamed_attrs[attr]] = value
-        else:
-            ret[attr] = value
-
-    return ret
-
-
-def post_event(evt_type, **evt):
-    bus = get_bus()
-    bus.post(evt_type(player=evt.get('device'), plugin='media.chromecast', **evt))
-
-
-class MediaChromecastPlugin(MediaPlugin):
+class MediaChromecastPlugin(MediaPlugin, RunnablePlugin):
     """
-    Plugin to interact with Chromecast devices
-
-    Supported formats:
-
-        * HTTP media URLs
-        * YouTube URLs
-        * Plex (through ``media.plex`` plugin, experimental)
-
+    Plugin to control Chromecast devices.
     """
 
     STREAM_TYPE_UNKNOWN = "UNKNOWN"
     STREAM_TYPE_BUFFERED = "BUFFERED"
     STREAM_TYPE_LIVE = "LIVE"
 
-    class MediaListener:
-        def __init__(self, name, cast):
-            self.name = name
-            self.cast = cast
-            self.status = convert_status(cast.media_controller.status)
-            self.last_status_timestamp = time.time()
-
-        def new_media_status(self, status):
-            status = convert_status(status)
-
-            if status.get('url') and status.get('url') != self.status.get('url'):
-                post_event(
-                    NewPlayingMediaEvent,
-                    resource=status['url'],
-                    title=status.get('title'),
-                    device=self.name,
-                )
-            if status.get('state') != self.status.get('state'):
-                if status.get('state') == 'play':
-                    post_event(MediaPlayEvent, resource=status['url'], device=self.name)
-                elif status.get('state') == 'pause':
-                    post_event(
-                        MediaPauseEvent, resource=status['url'], device=self.name
-                    )
-                elif status.get('state') in ['stop', 'idle']:
-                    post_event(MediaStopEvent, device=self.name)
-            if status.get('volume') != self.status.get('volume'):
-                post_event(
-                    MediaVolumeChangedEvent,
-                    volume=status.get('volume'),
-                    device=self.name,
-                )
-            # noinspection PyUnresolvedReferences
-            if (
-                abs(status.get('position') - self.status.get('position'))
-                > time.time() - self.last_status_timestamp + 5
-            ):
-                post_event(
-                    MediaSeekEvent, position=status.get('position'), device=self.name
-                )
-
-            self.last_status_timestamp = time.time()
-            self.status = status
-
-    class SubtitlesAsyncHandler:
-        def __init__(self, mc, subtitle_id):
-            self.mc = mc
-            self.subtitle_id = subtitle_id
-            self.initialized = False
-
-        # pylint: disable=unused-argument
-        def new_media_status(self, *_):
-            if self.subtitle_id and not self.initialized:
-                self.mc.update_status()
-                self.mc.enable_subtitle(self.subtitle_id)
-                self.initialized = True
-
-    def __init__(self, chromecast=None, *args, **kwargs):
+    def __init__(
+        self, chromecast: Optional[str] = None, poll_interval: float = 30, **kwargs
+    ):
         """
-        :param chromecast: Default Chromecast to cast to if no name is specified
-        :type chromecast: str
+        :param chromecast: Default Chromecast to cast to if no name is specified.
+        :param poll_interval: How often the plugin should poll for new/removed
+            Chromecast devices (default: 30 seconds).
         """
 
-        super().__init__(*args, **kwargs)
+        super().__init__(poll_interval=poll_interval, **kwargs)
 
         self._is_local = False
         self.chromecast = chromecast
         self.chromecasts = {}
         self._media_listeners = {}
+        self._refresh_lock = threading.RLock()
 
-    @staticmethod
-    def _get_chromecasts(*args, **kwargs):
-        import pychromecast
+    def _get_chromecasts(self, *args, **kwargs):
+        with self._refresh_lock:
+            chromecasts = pychromecast.get_chromecasts(*args, **kwargs)
 
-        chromecasts = pychromecast.get_chromecasts(*args, **kwargs)
         if isinstance(chromecasts, tuple):
             return chromecasts[0]
         return chromecasts
@@ -161,87 +54,89 @@ class MediaChromecastPlugin(MediaPlugin):
             return getattr(cc.device, prop)
         return getattr(cc.cast_info, prop)
 
-    @action
-    def get_chromecasts(
-        self, tries=2, retry_wait=10, timeout=60, blocking=True, callback=None
+    def _serialize_device(self, cc: pychromecast.Chromecast) -> dict:
+        """
+        Convert a Chromecast object and its status to a dictionary.
+        """
+        return {
+            'type': cc.cast_type,
+            'name': cc.name,
+            'manufacturer': self._get_device_property(cc, 'manufacturer'),
+            'model_name': cc.model_name,
+            'uuid': str(cc.uuid),
+            'address': cc.host if hasattr(cc, 'host') else cc.uri.split(':')[0],
+            'port': cc.port if hasattr(cc, 'port') else int(cc.uri.split(':')[1]),
+            'status': (
+                {
+                    'app': {
+                        'id': cc.app_id,
+                        'name': cc.app_display_name,
+                    },
+                    'is_active_input': cc.status.is_active_input,
+                    'is_stand_by': cc.status.is_stand_by,
+                    'is_idle': cc.is_idle,
+                    'namespaces': cc.status.namespaces,
+                    'volume': round(100 * cc.status.volume_level, 2),
+                    'muted': cc.status.volume_muted,
+                    **convert_status(cc.media_controller.status),
+                }
+                if cc.status
+                else {}
+            ),
+        }
+
+    def _refresh_chromecasts(
+        self,
+        tries: int = 2,
+        retry_wait: float = 10,
+        timeout: float = 60,
+        blocking: bool = True,
+        callback: Optional[Callable] = None,
     ):
         """
         Get the list of Chromecast devices
 
         :param tries: Number of retries (default: 2)
-        :type tries: int
-
         :param retry_wait: Number of seconds between retries (default: 10 seconds)
-        :type retry_wait: int
-
         :param timeout: Timeout before failing the call (default: 60 seconds)
-        :type timeout: int
-
-        :param blocking: If true, then the function will block until all the Chromecast
-            devices have been scanned. If false, then the provided callback function will be
-            invoked when a new device is discovered
-        :type blocking: bool
-
-        :param callback: If blocking is false, then you can provide a callback function that
-            will be invoked when a new device is discovered
-        :type callback: func
+        :param blocking: If true, then the function will block until all the
+            Chromecast devices have been scanned. If false, then the provided
+            callback function will be invoked when a new device is discovered
+        :param callback: If blocking is false, then you can provide a callback
+            function that will be invoked when a new device is discovered
         """
-        self.chromecasts.update(
-            {
-                self._get_device_property(cast, 'friendly_name'): cast
-                for cast in self._get_chromecasts(
-                    tries=tries,
-                    retry_wait=retry_wait,
-                    timeout=timeout,
-                    blocking=blocking,
-                    callback=callback,
-                )
-            }
-        )
+        self.chromecasts = {
+            self._get_device_property(cast, 'friendly_name'): cast
+            for cast in self._get_chromecasts(
+                tries=tries,
+                retry_wait=retry_wait,
+                timeout=timeout,
+                blocking=blocking,
+                callback=callback,
+            )
+        }
 
         for name, cast in self.chromecasts.items():
             self._update_listeners(name, cast)
 
-        return [
-            {
-                'type': cc.cast_type,
-                'name': cc.name,
-                'manufacturer': self._get_device_property(cc, 'manufacturer'),
-                'model_name': cc.model_name,
-                'uuid': str(cc.uuid),
-                'address': cc.host if hasattr(cc, 'host') else cc.uri.split(':')[0],
-                'port': cc.port if hasattr(cc, 'port') else int(cc.uri.split(':')[1]),
-                'status': (
-                    {
-                        'app': {
-                            'id': cc.app_id,
-                            'name': cc.app_display_name,
-                        },
-                        'media': self.status(cc.name).output,
-                        'is_active_input': cc.status.is_active_input,
-                        'is_stand_by': cc.status.is_stand_by,
-                        'is_idle': cc.is_idle,
-                        'namespaces': cc.status.namespaces,
-                        'volume': round(100 * cc.status.volume_level, 2),
-                        'muted': cc.status.volume_muted,
-                    }
-                    if cc.status
-                    else {}
-                ),
-            }
-            for cc in self.chromecasts.values()
-        ]
+        for cast in self.chromecasts.values():
+            cast.wait()
+
+    def _event_callback(self, _, cast: pychromecast.Chromecast):
+        with self._refresh_lock:
+            self.chromecasts[self._get_device_property(cast, 'friendly_name')] = cast
 
     def _update_listeners(self, name, cast):
         if name not in self._media_listeners:
             cast.start()
-            self._media_listeners[name] = self.MediaListener(name=name, cast=cast)
+            self._media_listeners[name] = MediaListener(
+                name=name, cast=cast, callback=self._event_callback
+            )
             cast.media_controller.register_status_listener(self._media_listeners[name])
 
     def get_chromecast(self, chromecast=None, n_tries=2):
-        import pychromecast
-
         if isinstance(chromecast, pychromecast.Chromecast):
+            assert chromecast, 'Invalid Chromecast object'
             return chromecast
 
         if not chromecast:
@@ -267,7 +162,7 @@ class MediaChromecastPlugin(MediaPlugin):
                     break
 
             if chromecast not in self.chromecasts:
-                raise RuntimeError('Device {} not found'.format(chromecast))
+                raise RuntimeError(f'Device {chromecast} not found')
 
         cast = self.chromecasts[chromecast]
         cast.wait()
@@ -276,99 +171,72 @@ class MediaChromecastPlugin(MediaPlugin):
     @action
     def play(
         self,
-        resource,
-        content_type=None,
-        chromecast=None,
-        title=None,
-        image_url=None,
-        autoplay=True,
-        current_time=0,
-        stream_type=STREAM_TYPE_BUFFERED,
-        subtitles=None,
-        subtitles_lang='en-US',
-        subtitles_mime='text/vtt',
-        subtitle_id=1,
+        resource: str,
+        *_,
+        content_type: Optional[str] = None,
+        chromecast: Optional[str] = None,
+        title: Optional[str] = None,
+        image_url: Optional[str] = None,
+        autoplay: bool = True,
+        current_time: int = 0,
+        stream_type: str = STREAM_TYPE_BUFFERED,
+        subtitles: Optional[str] = None,
+        subtitles_lang: str = 'en-US',
+        subtitles_mime: str = 'text/vtt',
+        subtitle_id: int = 1,
+        **__,
     ):
         """
-        Cast media to a visible Chromecast
+        Cast media to an available Chromecast device.
 
         :param resource: Media to cast
-        :type resource: str
-
         :param content_type: Content type as a MIME type string
-        :type content_type: str
-
-        :param chromecast: Chromecast to cast to. If none is specified, then the default configured Chromecast
-            will be used.
-        :type chromecast: str
-
+        :param chromecast: Chromecast to cast to. If none is specified, then
+            the default configured Chromecast will be used.
         :param title: Optional title
-        :type title: str
-
         :param image_url: URL of the image to use for the thumbnail
-        :type image_url: str
-
-        :param autoplay: Set it to false if you don't want the content to start playing immediately (default: true)
-        :type autoplay: bool
-
+        :param autoplay: Set it to false if you don't want the content to start
+            playing immediately (default: true)
         :param current_time: Time to start the playback in seconds (default: 0)
-        :type current_time: int
-
-        :param stream_type: Type of stream to cast. Can be BUFFERED (default), LIVE or UNKNOWN
-        :type stream_type: str
-
+        :param stream_type: Type of stream to cast. Can be BUFFERED (default),
+            LIVE or UNKNOWN
         :param subtitles: URL of the subtitles to be shown
-        :type subtitles: str
-
         :param subtitles_lang: Subtitles language (default: en-US)
-        :type subtitles_lang: str
-
         :param subtitles_mime: Subtitles MIME type (default: text/vtt)
-        :type subtitles_mime: str
-
         :param subtitle_id: ID of the subtitles to be loaded (default: 1)
-        :type subtitle_id: int
         """
 
-        from pychromecast.controllers.youtube import YouTubeController
-
         if not chromecast:
             chromecast = self.chromecast
 
         post_event(MediaPlayRequestEvent, resource=resource, device=chromecast)
         cast = self.get_chromecast(chromecast)
-
         mc = cast.media_controller
-        yt = self._get_youtube_url(resource)
-
-        if yt:
-            self.logger.info('Playing YouTube video {} on {}'.format(yt, chromecast))
-
-            hndl = YouTubeController()
-            cast.register_handler(hndl)
-            hndl.update_screen_id()
-            return hndl.play_video(yt)
-
         resource = self._get_resource(resource)
 
         if not content_type:
             content_type = get_mime_type(resource)
 
         if not content_type:
-            raise RuntimeError(
-                'content_type required to process media {}'.format(resource)
-            )
+            raise RuntimeError(f'content_type required to process media {resource}')
 
         if not resource.startswith('http://') and not resource.startswith('https://'):
-            resource = self.start_streaming(resource).output['url']
-            self.logger.info('HTTP media stream started on {}'.format(resource))
+            resource = self._start_streaming(resource)['url']
+            resource = get_remote_base_url() + resource
+            self.logger.info('HTTP media stream started on %s', resource)
 
-        self.logger.info('Playing {} on {}'.format(resource, chromecast))
+        if self._latest_resource:
+            if not title:
+                title = self._latest_resource.title
+            if not image_url:
+                image_url = self._latest_resource.image
+
+        self.logger.info('Playing %s on %s', resource, chromecast)
 
         mc.play_media(
             resource,
             content_type,
-            title=title,
+            title=self._latest_resource.title if self._latest_resource else title,
             thumb=image_url,
             current_time=current_time,
             autoplay=autoplay,
@@ -380,33 +248,26 @@ class MediaChromecastPlugin(MediaPlugin):
         )
 
         if subtitles:
-            mc.register_status_listener(self.SubtitlesAsyncHandler(mc, subtitle_id))
+            mc.register_status_listener(SubtitlesAsyncHandler(mc, subtitle_id))
 
         mc.block_until_active()
-
         if self.volume:
             self.set_volume(volume=self.volume, chromecast=chromecast)
 
         return self.status(chromecast=chromecast)
 
-    @classmethod
-    def _get_youtube_url(cls, url):
-        m = re.match(r'https?://(www\.)?youtube\.com/watch\?v=([^&]+).*', url)
-        if m:
-            return m.group(2)
-
-        m = re.match('youtube:video:(.*)', url)
-        if m:
-            return m.group(1)
-
-        return None
-
     @action
     def load(self, *args, **kwargs):
+        """
+        Alias for :meth:`.play`.
+        """
         return self.play(*args, **kwargs)
 
     @action
-    def pause(self, chromecast=None):
+    def pause(self, *_, chromecast: Optional[str] = None, **__):
+        """
+        Pause the current media on the Chromecast.
+        """
         chromecast = chromecast or self.chromecast
         cast = self.get_chromecast(chromecast)
 
@@ -419,7 +280,7 @@ class MediaChromecastPlugin(MediaPlugin):
         return self.status(chromecast=chromecast)
 
     @action
-    def stop(self, chromecast=None):
+    def stop(self, *_, chromecast: Optional[str] = None, **__):
         chromecast = chromecast or self.chromecast
         cast = self.get_chromecast(chromecast)
         cast.media_controller.stop()
@@ -428,7 +289,7 @@ class MediaChromecastPlugin(MediaPlugin):
         return self.status(chromecast=chromecast)
 
     @action
-    def rewind(self, chromecast=None):
+    def rewind(self, chromecast: Optional[str] = None):
         chromecast = chromecast or self.chromecast
         cast = self.get_chromecast(chromecast)
         cast.media_controller.rewind()
@@ -436,18 +297,18 @@ class MediaChromecastPlugin(MediaPlugin):
         return self.status(chromecast=chromecast)
 
     @action
-    def set_position(self, position, chromecast=None):
+    def set_position(self, position: float, chromecast: Optional[str] = None, **_):
         cast = self.get_chromecast(chromecast or self.chromecast)
         cast.media_controller.seek(position)
         cast.wait()
         return self.status(chromecast=chromecast)
 
     @action
-    def seek(self, position, chromecast=None):
+    def seek(self, position: float, chromecast: Optional[str] = None, **_):
         return self.forward(chromecast=chromecast, offset=position)
 
     @action
-    def back(self, chromecast=None, offset=30):
+    def back(self, chromecast: Optional[str] = None, offset: int = 30, **_):
         cast = self.get_chromecast(chromecast or self.chromecast)
         mc = cast.media_controller
         if mc.status.current_time:
@@ -457,7 +318,7 @@ class MediaChromecastPlugin(MediaPlugin):
         return self.status(chromecast=chromecast)
 
     @action
-    def forward(self, chromecast=None, offset=30):
+    def forward(self, chromecast: Optional[str] = None, offset: int = 30, **_):
         cast = self.get_chromecast(chromecast or self.chromecast)
         mc = cast.media_controller
         if mc.status.current_time:
@@ -467,158 +328,248 @@ class MediaChromecastPlugin(MediaPlugin):
         return self.status(chromecast=chromecast)
 
     @action
-    def is_playing(self, chromecast=None):
+    def is_playing(self, chromecast: Optional[str] = None, **_):
         return self.get_chromecast(
             chromecast or self.chromecast
         ).media_controller.is_playing
 
     @action
-    def is_paused(self, chromecast=None):
+    def is_paused(self, chromecast: Optional[str] = None, **_):
         return self.get_chromecast(
             chromecast or self.chromecast
         ).media_controller.is_paused
 
     @action
-    def is_idle(self, chromecast=None):
+    def is_idle(self, chromecast: Optional[str] = None):
         return self.get_chromecast(
             chromecast or self.chromecast
         ).media_controller.is_idle
 
     @action
-    def list_subtitles(self, chromecast=None):
+    def list_subtitles(self, chromecast: Optional[str] = None):
         return self.get_chromecast(
             chromecast or self.chromecast
         ).media_controller.subtitle_tracks
 
     @action
-    def enable_subtitles(self, chromecast=None, track_id=None):
+    def enable_subtitles(
+        self, chromecast: Optional[str] = None, track_id: Optional[str] = None, **_
+    ):
         mc = self.get_chromecast(chromecast or self.chromecast).media_controller
         if track_id is not None:
             return mc.enable_subtitle(track_id)
-        elif mc.subtitle_tracks:
+        if mc.subtitle_tracks:
             return mc.enable_subtitle(mc.subtitle_tracks[0].get('trackId'))
 
     @action
-    def disable_subtitles(self, chromecast=None, track_id=None):
+    def disable_subtitles(
+        self, chromecast: Optional[str] = None, track_id: Optional[str] = None, **_
+    ):
         mc = self.get_chromecast(chromecast or self.chromecast).media_controller
         if track_id:
             return mc.disable_subtitle(track_id)
-        elif mc.current_subtitle_tracks:
+        if mc.current_subtitle_tracks:
             return mc.disable_subtitle(mc.current_subtitle_tracks[0])
 
     @action
-    def toggle_subtitles(self, chromecast=None):
+    def toggle_subtitles(self, chromecast: Optional[str] = None, **_):
         mc = self.get_chromecast(chromecast or self.chromecast).media_controller
         all_subs = mc.status.subtitle_tracks
         cur_subs = mc.status.status.current_subtitle_tracks
 
         if cur_subs:
             return self.disable_subtitles(chromecast, cur_subs[0])
-        else:
-            return self.enable_subtitles(chromecast, all_subs[0].get('trackId'))
+
+        return self.enable_subtitles(chromecast, all_subs[0].get('trackId'))
 
     @action
-    def status(self, chromecast=None):
-        cast = self.get_chromecast(chromecast or self.chromecast)
-        status = cast.media_controller.status
-        return convert_status(status)
+    def status(self, chromecast: Optional[str] = None):
+        """
+        :return: The status of a Chromecast (if ``chromecast`` is specified) or
+            all the discovered/available Chromecasts. Format:
+
+                .. code-block:: python
+                    {
+                      "type": "cast",  # Can be "cast" or "audio"
+                      "name": "Living Room TV",
+                      "manufacturer": "Google Inc.",
+                      "model_name": "Chromecast",
+                      "uuid": "f812afac-80ff-11ee-84dc-001500e8f607",
+                      "address": "192.168.1.2",
+                      "port": 8009,
+                      "status": {
+                        "app": {
+                          "id": "CC1AD845",
+                          "name": "Default Media Receiver"
+                        },
+                        "is_active_input": false,
+                        "is_stand_by": true,
+                        "is_idle": true,
+                        "namespaces": [
+                          "urn:x-cast:com.google.cast.cac",
+                          "urn:x-cast:com.google.cast.debugoverlay",
+                          "urn:x-cast:com.google.cast.media"
+                        ],
+                        "volume": 100,
+                        "muted": false,
+                        "adjusted_current_time": 14.22972,
+                        "album_artist": null,
+                        "album_name": null,
+                        "artist": null,
+                        "url": "https://some/video.mp4",
+                        "content_type": "video/mp4",
+                        "current_subtitle_tracks": [],
+                        "position": 1.411891,
+                        "duration": 253.376145,
+                        "episode": null,
+                        "idle_reason": null,
+                        "images": [
+                          [
+                            "https://some/image.jpg",
+                            null,
+                            null
+                          ]
+                        ],
+                        "last_updated": "2023-11-12T02:03:33.888843",
+                        "media_custom_data": {},
+                        "media_is_generic": true,
+                        "media_is_movie": false,
+                        "media_is_musictrack": false,
+                        "media_is_photo": false,
+                        "media_is_tvshow": false,
+                        "media_metadata": {
+                          "title": "Some media",
+                          "thumb": "https://some/image.jpg",
+                          "images": [
+                            {
+                              "url": "https://some/image.jpg"
+                            }
+                          ],
+                          "metadataType": 0
+                        },
+                        "media_session_id": 1,
+                        "metadata_type": 0,
+                        "playback_rate": 1,
+                        "player_is_idle": false,
+                        "player_is_paused": false,
+                        "player_is_playing": true,
+                        "state": "play",
+                        "season": null,
+                        "series_title": null,
+                        "stream_type": "BUFFERED",
+                        "stream_type_is_buffered": true,
+                        "stream_type_is_live": false,
+                        "subtitle_tracks": [],
+                        "supported_media_commands": 12303,
+                        "supports_pause": true,
+                        "supports_queue_next": false,
+                        "supports_queue_prev": false,
+                        "seekable": true,
+                        "supports_skip_backward": false,
+                        "supports_skip_forward": false,
+                        "supports_stream_mute": true,
+                        "supports_stream_volume": true,
+                        "title": "Some media",
+                        "track": null
+                      }
+                }
+        """
+        return self._status(chromecast=chromecast)
+
+    def _status(self, chromecast: Optional[str] = None) -> dict:
+        if chromecast:
+            assert (
+                chromecast in self.chromecasts
+            ), f'No such Chromecast device: {chromecast}'
+            return self._serialize_device(self.chromecasts[chromecast])
+
+        return {
+            name: self._serialize_device(cast)
+            for name, cast in self.chromecasts.items()
+        }
 
     @action
-    def disconnect(self, chromecast=None, timeout=None, blocking=True):
+    def disconnect(
+        self,
+        chromecast: Optional[str] = None,
+        timeout: Optional[float] = None,
+        blocking: bool = True,
+    ):
         """
         Disconnect a Chromecast and wait for it to terminate
 
-        :param chromecast: Chromecast to cast to. If none is specified, then the default configured Chromecast
-            will be used.
-        :type chromecast: str
-
-        :param timeout: Number of seconds to wait for disconnection (default: None: block until termination)
-        :type timeout: float
-
-        :param blocking: If set (default), then the code will wait until disconnection, otherwise it will return
-            immediately.
-        :type blocking: bool
+        :param chromecast: Chromecast to cast to. If none is specified, then
+            the default configured Chromecast will be used.
+        :param timeout: Number of seconds to wait for disconnection (default:
+            None: block until termination).
+        :param blocking: If set (default), then the code will wait until
+            disconnection, otherwise it will return immediately.
         """
-
         cast = self.get_chromecast(chromecast)
         cast.disconnect(timeout=timeout, blocking=blocking)
 
     @action
-    def join(self, chromecast=None, timeout=None):
+    def join(self, chromecast: Optional[str] = None, timeout: Optional[float] = None):
         """
         Blocks the thread until the Chromecast connection is terminated.
 
-        :param chromecast: Chromecast to cast to. If none is specified, then the default configured Chromecast
-            will be used.
-        :type chromecast: str
-
-        :param timeout: Number of seconds to wait for disconnection (default: None: block until termination)
-        :type timeout: float
+        :param chromecast: Chromecast to cast to. If none is specified, then
+            the default configured Chromecast will be used.
+        :param timeout: Number of seconds to wait for disconnection (default:
+            None: block until termination).
         """
-
         cast = self.get_chromecast(chromecast)
         cast.join(timeout=timeout)
 
     @action
-    def quit(self, chromecast=None):
+    def quit(self, chromecast: Optional[str] = None):
         """
         Exits the current app on the Chromecast
 
-        :param chromecast: Chromecast to cast to. If none is specified, then the default configured Chromecast
-            will be used.
-        :type chromecast: str
+        :param chromecast: Chromecast to cast to. If none is specified, then
+            the default configured Chromecast will be used.
         """
-
         cast = self.get_chromecast(chromecast)
         cast.quit_app()
 
     @action
-    def reboot(self, chromecast=None):
+    def reboot(self, chromecast: Optional[str] = None):
         """
         Reboots the Chromecast
 
-        :param chromecast: Chromecast to cast to. If none is specified, then the default configured Chromecast
-            will be used.
-        :type chromecast: str
+        :param chromecast: Chromecast to cast to. If none is specified, then
+            the default configured Chromecast will be used.
         """
-
         cast = self.get_chromecast(chromecast)
         cast.reboot()
 
     @action
-    def set_volume(self, volume, chromecast=None):
+    def set_volume(self, volume: float, chromecast: Optional[str] = None):
         """
         Set the Chromecast volume
 
-        :param volume: Volume to be set, between 0 and 100
-        :type volume: float
-
-        :param chromecast: Chromecast to cast to. If none is specified, then the default configured Chromecast
-            will be used.
-        :type chromecast: str
+        :param volume: Volume to be set, between 0 and 100.
+        :param chromecast: Chromecast to cast to. If none is specified, then
+            the default configured Chromecast will be used.
         """
-
         chromecast = chromecast or self.chromecast
         cast = self.get_chromecast(chromecast)
         cast.set_volume(volume / 100)
         cast.wait()
-        status = self.status(chromecast=chromecast)
-        status.output['volume'] = volume
-        return status
+        return {
+            **self._status(chromecast=chromecast),
+            'volume': volume,
+        }
 
     @action
-    def volup(self, chromecast=None, step=10):
+    def volup(self, chromecast: Optional[str] = None, step: float = 10, **_):
         """
         Turn up the Chromecast volume by 10% or step.
 
-        :param chromecast: Chromecast to cast to. If none is specified, then the default configured Chromecast
-            will be used.
-        :type chromecast: str
-
-        :param step: Volume increment between 0 and 100 (default: 100%)
-        :type step: float
+        :param chromecast: Chromecast to cast to. If none is specified, then
+            the default configured Chromecast will be used.
+        :param step: Volume increment between 0 and 100 (default: 10%).
         """
-
         chromecast = chromecast or self.chromecast
         cast = self.get_chromecast(chromecast)
         step /= 100
@@ -627,18 +578,14 @@ class MediaChromecastPlugin(MediaPlugin):
         return self.status(chromecast=chromecast)
 
     @action
-    def voldown(self, chromecast=None, step=10):
+    def voldown(self, chromecast: Optional[str] = None, step: float = 10, **_):
         """
         Turn down the Chromecast volume by 10% or step.
 
-        :param chromecast: Chromecast to cast to. If none is specified, then the default configured Chromecast
-            will be used.
-        :type chromecast: str
-
-        :param step: Volume decrement between 0 and 100 (default: 100%)
-        :type step: float
+        :param chromecast: Chromecast to cast to. If none is specified, then
+            the default configured Chromecast will be used.
+        :param step: Volume decrement between 0 and 100 (default: 10%).
         """
-
         chromecast = chromecast or self.chromecast
         cast = self.get_chromecast(chromecast)
         step /= 100
@@ -647,26 +594,31 @@ class MediaChromecastPlugin(MediaPlugin):
         return self.status(chromecast=chromecast)
 
     @action
-    def mute(self, chromecast=None):
+    def mute(self, chromecast: Optional[str] = None):
         """
         Toggle the mute status on the Chromecast
 
-        :param chromecast: Chromecast to cast to. If none is specified, then the default configured Chromecast
-            will be used.
-        :type chromecast: str
+        :param chromecast: Chromecast to cast to. If none is specified, then
+            the default configured Chromecast will be used.
         """
-
         chromecast = chromecast or self.chromecast
         cast = self.get_chromecast(chromecast)
         cast.set_volume_muted(not cast.status.volume_muted)
         cast.wait()
         return self.status(chromecast=chromecast)
 
-    def set_subtitles(self, filename, *args, **kwargs):
+    def set_subtitles(self, *_, **__):
         raise NotImplementedError
 
-    def remove_subtitles(self, *args, **kwargs):
+    def remove_subtitles(self, *_, **__):
         raise NotImplementedError
 
+    def main(self):
+        while not self.should_stop():
+            try:
+                self._refresh_chromecasts()
+            finally:
+                self.wait_stop(self.poll_interval)
+
 
 # vim:sw=4:ts=4:et:

platypush/plugins/media/chromecast/_listener.py

@@ -0,0 +1,77 @@
+import logging
+import time
+from typing import Optional
+
+from platypush.message.event.media import (
+    MediaPlayEvent,
+    MediaStopEvent,
+    MediaPauseEvent,
+    NewPlayingMediaEvent,
+    MediaVolumeChangedEvent,
+    MediaSeekEvent,
+)
+
+from ._utils import MediaCallback, convert_status, post_event
+
+logger = logging.getLogger(__name__)
+
+
+class MediaListener:
+    """
+    Listens for media status changes and posts events accordingly.
+    """
+
+    def __init__(self, name: str, cast, callback: Optional[MediaCallback] = None):
+        self.name = name
+        self.cast = cast
+        self.status = convert_status(cast.media_controller.status)
+        self.last_status_timestamp = time.time()
+        self.callback = callback
+
+    def new_media_status(self, status):
+        status = convert_status(status)
+        if status.get('url') and status.get('url') != self.status.get('url'):
+            self._post_event(
+                NewPlayingMediaEvent,
+                title=status.get('title'),
+            )
+
+        state = status.get('state')
+        if state != self.status.get('state'):
+            if state == 'play':
+                self._post_event(MediaPlayEvent)
+            elif state == 'pause':
+                self._post_event(MediaPauseEvent)
+            elif state in ('stop', 'idle'):
+                self._post_event(MediaStopEvent)
+
+        if status.get('volume') != self.status.get('volume'):
+            self._post_event(MediaVolumeChangedEvent, volume=status.get('volume'))
+
+        if (
+            status.get('position')
+            and self.status.get('position')
+            and abs(status['position'] - self.status['position'])
+            > time.time() - self.last_status_timestamp + 5
+        ):
+            self._post_event(MediaSeekEvent, position=status.get('position'))
+
+        self.status = status
+        self.last_status_timestamp = time.time()
+
+    def load_media_failed(self, item, error_code):
+        logger.warning('Failed to load media %s: %d', item, error_code)
+
+    def _post_event(self, evt_type, **evt):
+        status = evt.get('status', {})
+        resource = status.get('url')
+        args = {
+            'device': self.name,
+            'plugin': 'media.chromecast',
+            **evt,
+        }
+
+        if resource:
+            args['resource'] = resource
+
+        post_event(evt_type, callback=self.callback, chromecast=self.cast, **args)

platypush/plugins/media/chromecast/_subtitles.py

@@ -0,0 +1,16 @@
+# pylint: disable=too-few-public-methods
+class SubtitlesAsyncHandler:
+    """
+    This class is used to enable subtitles when the media is loaded.
+    """
+
+    def __init__(self, mc, subtitle_id):
+        self.mc = mc
+        self.subtitle_id = subtitle_id
+        self.initialized = False
+
+    def new_media_status(self, *_):
+        if self.subtitle_id and not self.initialized:
+            self.mc.update_status()
+            self.mc.enable_subtitle(self.subtitle_id)
+            self.initialized = True

platypush/plugins/media/chromecast/_utils.py

@@ -0,0 +1,64 @@
+import datetime
+from typing import Any, Callable, Optional
+
+import pychromecast  # type: ignore
+
+from platypush.context import get_bus
+from platypush.message.event.media import MediaEvent
+
+MediaCallback = Callable[[MediaEvent, pychromecast.Chromecast], Optional[Any]]
+
+
+def convert_status(status) -> dict:
+    """
+    Convert a Chromecast status object to a dictionary.
+    """
+    attrs = [
+        a
+        for a in dir(status)
+        if not a.startswith('_') and not callable(getattr(status, a))
+    ]
+
+    renamed_attrs = {
+        'current_time': 'position',
+        'player_state': 'state',
+        'supports_seek': 'seekable',
+        'volume_level': 'volume',
+        'volume_muted': 'muted',
+        'content_id': 'url',
+    }
+
+    ret = {}
+    for attr in attrs:
+        value = getattr(status, attr)
+        if attr == 'volume_level':
+            value = round(100 * value, 2)
+        if attr == 'player_state':
+            value = value.lower()
+            if value == 'paused':
+                value = 'pause'
+            if value == 'playing':
+                value = 'play'
+        if isinstance(value, datetime.datetime):
+            value = value.isoformat()
+
+        if attr in renamed_attrs:
+            ret[renamed_attrs[attr]] = value
+        else:
+            ret[attr] = value
+
+    return ret
+
+
+def post_event(
+    evt_type,
+    callback: Optional[MediaCallback] = None,
+    chromecast: Optional[pychromecast.Chromecast] = None,
+    **evt
+):
+    evt['plugin'] = 'media.chromecast'
+    event = evt_type(player=evt.get('device'), **evt)
+
+    get_bus().post(event)
+    if callback:
+        callback(event, chromecast)

platypush/utils/mock/modules.py

@@ -82,6 +82,7 @@ mock_imports = [
     "pvporcupine ",
     "pyHS100",
     "pyaudio",
+    "pychromecast",
     "pyclip",
     "pydbus",
     "pyfirmata2",