153 lines
4.2 KiB
Python
153 lines
4.2 KiB
Python
"""A dummy backend for use in tests.
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This backend implements the backend API in the simplest way possible. It is
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used in tests of the frontends.
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"""
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import pykka
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from mopidy import backend
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from mopidy.models import Playlist, Ref, SearchResult
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def create_proxy(config=None, audio=None):
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return DummyBackend.start(config=config, audio=audio).proxy()
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class DummyBackend(pykka.ThreadingActor, backend.Backend):
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def __init__(self, config, audio):
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super().__init__()
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self.library = DummyLibraryProvider(backend=self)
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if audio:
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self.playback = backend.PlaybackProvider(audio=audio, backend=self)
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else:
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self.playback = DummyPlaybackProvider(audio=audio, backend=self)
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self.playlists = DummyPlaylistsProvider(backend=self)
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self.uri_schemes = ["dummy"]
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class DummyLibraryProvider(backend.LibraryProvider):
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root_directory = Ref.directory(uri="dummy:/", name="dummy")
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self.dummy_library = []
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self.dummy_get_distinct_result = {}
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self.dummy_browse_result = {}
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self.dummy_find_exact_result = SearchResult()
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self.dummy_search_result = SearchResult()
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def browse(self, path):
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return self.dummy_browse_result.get(path, [])
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def get_distinct(self, field, query=None):
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return self.dummy_get_distinct_result.get(field, set())
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def lookup(self, uri):
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uri = Ref.track(uri=uri).uri
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return [t for t in self.dummy_library if uri == t.uri]
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def refresh(self, uri=None):
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pass
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def search(self, query=None, uris=None, exact=False):
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if exact: # TODO: remove uses of dummy_find_exact_result
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return self.dummy_find_exact_result
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return self.dummy_search_result
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class DummyPlaybackProvider(backend.PlaybackProvider):
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self._uri = None
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self._time_position = 0
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def pause(self):
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return True
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def play(self):
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return self._uri and self._uri != "dummy:error"
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def change_track(self, track):
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"""Pass a track with URI 'dummy:error' to force failure"""
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self._uri = track.uri
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self._time_position = 0
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return True
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def prepare_change(self):
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pass
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def resume(self):
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return True
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def seek(self, time_position):
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self._time_position = time_position
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return True
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def stop(self):
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self._uri = None
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return True
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def get_time_position(self):
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return self._time_position
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class DummyPlaylistsProvider(backend.PlaylistsProvider):
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def __init__(self, backend):
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super().__init__(backend)
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self._playlists = []
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self._allow_save = True
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def set_dummy_playlists(self, playlists):
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"""For tests using the dummy provider through an actor proxy."""
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self._playlists = playlists
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def set_allow_save(self, enabled):
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self._allow_save = enabled
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def as_list(self):
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return [
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Ref.playlist(uri=pl.uri, name=pl.name) for pl in self._playlists
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]
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def get_items(self, uri):
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playlist = self.lookup(uri)
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if playlist is None:
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return
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return [Ref.track(uri=t.uri, name=t.name) for t in playlist.tracks]
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def lookup(self, uri):
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uri = Ref.playlist(uri=uri).uri
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for playlist in self._playlists:
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if playlist.uri == uri:
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return playlist
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def refresh(self):
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pass
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def create(self, name):
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playlist = Playlist(name=name, uri=f"dummy:{name}")
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self._playlists.append(playlist)
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return playlist
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def delete(self, uri):
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playlist = self.lookup(uri)
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if playlist:
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self._playlists.remove(playlist)
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def save(self, playlist):
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if not self._allow_save:
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return None
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old_playlist = self.lookup(playlist.uri)
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if old_playlist is not None:
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index = self._playlists.index(old_playlist)
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self._playlists[index] = playlist
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else:
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self._playlists.append(playlist)
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return playlist
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