Added lyrics to scores

folkugat_web/services/temes/lyrics.py

@@ -1,7 +1,26 @@
+import dataclasses
+import re
 from collections.abc import Iterable, Iterator
+from typing import Callable
 
 from folkugat_web.dal.sql.temes import lyrics as lyrics_dal
 from folkugat_web.model import temes as model
+from folkugat_web.utils import FnChain
+
+
+def _sub(pattern: str, sub: str) -> Callable[[str], str]:
+    def _inner_sub(text: str) -> str:
+        return re.sub(pattern, sub, text)
+    return _inner_sub
+
+
+def _clean_string(lyrics_str: str) -> str:
+    return (
+        FnChain.transform(lyrics_str) |
+        _sub(r" *", " ") |
+        _sub(r"\s*\n\s*", "\n") |
+        _sub(r"\n*", "\n")
+    ).result()
 
 
 def add_lyrics_to_tema(tema: model.Tema) -> model.Tema:
@@ -19,6 +38,7 @@ def get_lyric_by_id(lyric_id: int, tema_id: int | None = None) -> model.Lyrics |
 
 
 def update_lyric(lyric: model.Lyrics):
+    lyric = dataclasses.replace(lyric, content=_clean_string(lyric.content))
     lyrics_dal.update_lyric(lyric=lyric)