add lyrics route and methods

app/api/__init__.py

@@ -17,6 +17,7 @@ from app.api import (
     search,
     send_file,
     settings,
+    lyrics
 )
 
 
@@ -43,5 +44,6 @@ def create_api():
         app.register_blueprint(imgserver.api)
         app.register_blueprint(settings.api)
         app.register_blueprint(colors.api)
+        app.register_blueprint(lyrics.api)
 
         return app

app/api/lyrics.py

@@ -0,0 +1,25 @@
+from flask import Blueprint, request
+
+from app.lib.lyrics import get_lyrics
+
+api = Blueprint("lyrics", __name__, url_prefix="")
+
+
+@api.route("/lyrics", methods=["POST"])
+def send_lyrics():
+    """
+    Returns the lyrics for a track
+    """
+    data = request.get_json()
+
+    filepath = data.get("filepath", None)
+
+    if filepath is None:
+        return {"error": "No filepath provided"}, 400
+
+    lyrics = get_lyrics(filepath)
+
+    if lyrics is None:
+        return {"error": "No lyrics found"}, 204
+
+    return {"lyrics": lyrics}, 200

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)