Sansan
d77b72159d
main/ holds the main window and top bar, quiz/ the quiz and its parts, player/ the music player, popups/ every popup and what they share, data/ the songs, players, playlist and settings, server/ the MusicServer client, common/ the list row and GameLog, and themes/ the themes and style boxes.
102 lines
3.8 KiB
GDScript
102 lines
3.8 KiB
GDScript
class_name SongLoader
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extends Node
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## Downloads songs from the server into the Playlist ahead of time, so the next song
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## can start at once.
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##
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## How many songs it keeps ready is the cache size in the settings
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## ([code]Playlist.number_of_tracks_to_preload[/code]).
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## Emitted when the songs already in the server playlist have been loaded into the
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## Playlist.
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signal song_list_loaded
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## Emitted when a new song has been downloaded and added to the Playlist.
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signal song_added
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## Seconds to wait before retrying a download step that failed.
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var retry_seconds: float = 5.0
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## Loads the songs already in the server playlist, then starts preloading new ones.
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## Preloading waits for the list, because loading the list clears the playlist.
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func load_song_list() -> void:
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GameLog.debug("load_song_list")
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var song_list_fetched: Callable = func song_list_fetched(data: Variant) -> void:
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Playlist.clear_song_list()
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if typeof(data) == TYPE_ARRAY:
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for d: Dictionary in data:
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var new_song_object: SongObject = SongObject.new()
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new_song_object.song_number = d.SongNo
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new_song_object.soundtrack_title = d.Soundtrack
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new_song_object.song_title = d.Song
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new_song_object.is_answered = true
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new_song_object.has_played = true
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Playlist.add_to_playlist(new_song_object)
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elif data != null:
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GameLog.warning("Unexpected data")
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Playlist.update_last_played_song()
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song_list_loaded.emit()
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fetch_song_if_idle()
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MusicServerClient.fetch_song_list(song_list_fetched, _retry_later.bind(load_song_list))
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## Starts downloading one more song, which keeps downloading until the cache is full.
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func fetch_song() -> void:
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GameLog.debug("fetch_song")
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Playlist.is_song_downloading = true
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_download_random_song(SongObject.new())
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## Starts downloading a song unless one is already downloading.
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func fetch_song_if_idle() -> void:
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if !Playlist.is_song_downloading:
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fetch_song()
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## Starts downloading if nothing is downloading and the cache is not full, e.g. after
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## the cache size was raised.
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func fill_cache() -> void:
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if !Playlist.is_song_downloading && Playlist.should_preload_more_songs():
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fetch_song()
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# Fetching a song takes three requests. If one fails, only that step is retried, so
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# the server and the game keep the same songs in their playlists.
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func _download_random_song(new_song_object: SongObject) -> void:
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var song_downloaded: Callable = func song_downloaded(body: PackedByteArray) -> void:
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GameLog.debug("song_downloaded")
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var sound: AudioStream = AudioStreamMP3.new()
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sound.data = body
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new_song_object.song = sound
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_add_song_to_queue(new_song_object)
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MusicServerClient.fetch_random_song(Settings.use_low_played_mode, song_downloaded,
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_retry_later.bind(_download_random_song.bind(new_song_object)))
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func _add_song_to_queue(new_song_object: SongObject) -> void:
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MusicServerClient.add_to_queue(_fetch_song_info.bind(new_song_object),
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_retry_later.bind(_add_song_to_queue.bind(new_song_object)))
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func _fetch_song_info(new_song_object: SongObject) -> void:
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var song_info_fetched: Callable = func song_info_fetched(data_received: Dictionary) -> void:
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GameLog.debug("song_info_fetched")
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new_song_object.song_number = data_received.SongNo
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new_song_object.soundtrack_title = data_received.Soundtrack
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new_song_object.song_title = data_received.Song
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GameLog.debug("new_song_object: ", new_song_object.to_string())
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Playlist.add_to_playlist(new_song_object)
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if Playlist.should_preload_more_songs():
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fetch_song()
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else:
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Playlist.is_song_downloading = false
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song_added.emit()
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MusicServerClient.fetch_song_info(song_info_fetched,
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_retry_later.bind(_fetch_song_info.bind(new_song_object)))
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func _retry_later(step: Callable) -> void:
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GameLog.warning("Song download failed, retrying in %s seconds" % retry_seconds)
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get_tree().create_timer(retry_seconds).timeout.connect(step)
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