Extract parse_song_txt into own method

karaokatalog/Song.py

@@ -5,6 +5,8 @@ from dataclasses import dataclass
 from pathlib import Path
 from typing import Self
 
+from karaokatalog.parse_song_txt import parse_song_txt
+
 type Title = str
 type Artist = str
 
@@ -43,8 +45,7 @@ class Song:
 
     @classmethod
     def from_song_txt(cls, song_txt: Path) -> Self | None:
-        with song_txt.open(encoding="utf-8", errors="ignore") as f:
-            tags = dict(_parse_tag_line(line) for line in f if line.startswith("#"))
+        tags = parse_song_txt(song_txt)
 
         title = tags.get("TITLE")
         artist = tags.get("ARTIST")
@@ -65,26 +66,9 @@ class Song:
             song_txt=song_txt,
         )
 
-
-def _parse_tag_line(tag_line: str) -> tuple[str, str | None]:
-    """
-    Parse a tag line of the format:
-
-        #KEY:Value
-
-    or
-
-        #KEY:
-
-    Returns a tuple of (key, value), where the value might be None.
-    """
-
-    key_and_potentially_value = tuple(
-        tag_line.strip().removeprefix("#").split(":", maxsplit=1)
-    )
-
-    return (
-        key_and_potentially_value
-        if len(key_and_potentially_value) == 2
-        else (key_and_potentially_value[0], None)
-    )
+    def as_dict(self) -> dict[str, str]:
+        return {
+            "title": self.title,
+            "artist": self.artist,
+            # TODO More fields
+        }

karaokatalog/parse_song_txt.py

@@ -0,0 +1,33 @@
+from pathlib import Path
+from typing import Any
+
+
+def _parse_tag_line(tag_line: str) -> tuple[str, str | None]:
+    """
+    Parse a tag line of the format:
+
+        #KEY:Value
+
+    or
+
+        #KEY:
+
+    Returns a tuple of (key, value), where the value might be None.
+    """
+
+    key_and_potentially_value = tuple(
+        tag_line.strip().removeprefix("#").split(":", maxsplit=1)
+    )
+
+    return (
+        key_and_potentially_value
+        if len(key_and_potentially_value) == 2
+        else (key_and_potentially_value[0], None)
+    )
+
+
+def parse_song_txt(song_txt: Path) -> dict[str, Any]:
+    with song_txt.open(encoding="utf-8", errors="ignore") as f:
+        tags = dict(_parse_tag_line(line) for line in f if line.startswith("#"))
+
+    return tags