Afegir partitures de llistes (cançoners)

folkugat_web/services/playlists.py

@@ -170,3 +170,49 @@ async def add_set_score_to_set(tune_set: playlists.Set) -> playlists.Set:
         )
     else:
         return tune_set
+
+
+async def get_or_create_playlist_score(playlist: playlists.Playlist) -> playlists.PlaylistScore | None:
+    # The playlist is assumed to be enriched with tunes
+    if not playlist.sets:
+        return None
+
+    lilypond_playlist = lilypond_build.playlist_from_playlist(playlist)
+    if not lilypond_playlist.sets:
+        return None
+
+    playlist_score_hash = lilypond_playlist.hash().hex()
+
+    pdf_filepath = files_service.get_playlist_filename(f"{playlist_score_hash}.pdf")
+
+    if not pdf_filepath.exists():
+        # No score exists, so we need to create it
+        playlist_source = lilypond_source.playlist_source(playlist=lilypond_playlist)
+        out_filepath = files_service.get_playlist_filename(playlist_score_hash)
+        async with files_service.tmp_file(content=playlist_source) as source_filepath:
+            if not pdf_filepath.exists():
+                pdf_result = await lilypond_render.render_file(
+                    input_file=source_filepath,
+                    output=lilypond_render.RenderOutput.PDF,
+                    output_file=out_filepath,
+                )
+                if pdf_result.error is not None:
+                    return None
+                if pdf_result.result is None:
+                    raise RuntimeError("This shouldn't happen")
+                pdf_filepath = pdf_result.result
+
+    return playlists.PlaylistScore(
+        img_url=None,  # Only PDF generation for now
+        pdf_url=files_service.get_db_file_path(pdf_filepath),
+    )
+
+
+async def add_playlist_score_to_playlist(playlist: playlists.Playlist) -> playlists.Playlist:
+    if score := await get_or_create_playlist_score(playlist=playlist):
+        return dataclasses.replace(
+            playlist,
+            playlist_score=score,
+        )
+    else:
+        return playlist