add lyrics route and methods

app/lib/lyrics.py

@@ -0,0 +1,57 @@
+from pathlib import Path
+
+filepath = "/home/cwilvx/Music/Editor's Pick/Bad Day 😢/6 Dogs - Crying in the Rarri.m4a"
+
+
+def split_line(line: str):
+    items = line.split("]")
+    time = items[0].removeprefix("[")
+    lyric = items[1] if len(items) > 1 else ""
+
+    return (time, lyric.strip())
+
+
+def convert_to_milliseconds(time: str):
+    minutes, seconds = time.split(":")
+    milliseconds = int(minutes) * 60 * 1000 + float(seconds) * 1000
+    return int(milliseconds)
+
+
+def get_lyrics_from_lrc(filepath: str):
+    with open(filepath, mode="r") as file:
+        lines = (f.removesuffix("\n") for f in file.readlines())
+
+        lyrics = []
+
+        for line in lines:
+            time, lyric = split_line(line)
+            milliseconds = convert_to_milliseconds(time)
+
+            lyrics.append({milliseconds: lyric})
+
+        return lyrics
+
+
+def get_lyrics_file_rel_to_track(filepath: str):
+    """
+    Finds the lyrics file relative to the track file
+    """
+    lyrics_path = Path(filepath).with_suffix(".lrc")
+
+    if lyrics_path.exists():
+        return lyrics_path
+
+
+def get_lyrics(track_path: str):
+    """
+    Gets the lyrics for a track
+    """
+    lyrics_path = get_lyrics_file_rel_to_track(track_path)
+
+    if lyrics_path:
+        return get_lyrics_from_lrc(lyrics_path)
+    else:
+        return None
+
+
+get_lyrics(filepath)