Added a "Playlist" class.

wobuzz/player/playlist.py

@@ -0,0 +1,80 @@
+#!/usr/bin/python3
+
+import os
+from .track import Track
+
+
+class Playlist:
+    def __init__(self, app):
+        self.app = app
+        self.tracks: list[Track] = []
+        self.current_track_index = 0
+        self.current_track: Track | None = None
+
+    def load_from_paths(self, paths):
+        i = 0
+
+        while i < len(paths):
+            path = paths[i]
+
+            if os.path.isfile(path):
+                self.tracks.append(Track(self.app, path, cache=i==0))  # first track is cached
+
+            i += 1
+
+        self.current_track = self.tracks[0]  # current track is the first track in the playlist
+
+    def load_from_m3u(self, path):
+        file = open(path, "r")
+        m3u = file.read()
+        file.close()
+
+        lines = m3u.split("\n")  # m3u entries
+
+        i = 0
+
+        while i < len(lines):
+            line = lines[i]
+
+            if line.startswith("#") or line.startswith("http"):  # filter out comments, extended m3u and urls
+                continue
+
+            self.tracks.append(Track(self.app, line, cache=i==0))  # first track is cached
+
+            i += 1
+
+    def load_from_wbz(self, path):
+        pass
+
+    def has_tracks(self):
+        return len(self.tracks) > 0
+
+    def on_first_track(self):
+        return self.current_track_index == 0
+
+    def on_last_track(self):  # if the current track is the last
+        return self.current_track_index == len(self.tracks) - 1
+
+    def next_track(self):
+        self.current_track_index += 1
+        self.current_track = self.tracks[self.current_track_index]
+
+        if not self.current_track.cached:  # make sure the track is cached because else the player can't play it
+            self.current_track.cache()
+            self.current_track.cached = True
+
+        return self.current_track.sound, self.current_track.duration
+
+    def previous_track(self):
+        if self.on_first_track():
+            return self.current_track, self.current_track.duration
+
+        self.current_track_index -= 1
+        self.current_track = self.tracks[self.current_track_index]
+
+        if not self.current_track.cached:  # make sure the track is cached because else the player can't play it
+            self.current_track.cache()
+            self.current_track.cached = True
+
+        return self.current_track.sound, self.current_track.duration
+