Merge options -f and -ff into -f

spotdl/metadata/formatter.py

@@ -0,0 +1,24 @@
+def format_string(string, metadata, output_extension="", sanitizer=lambda s: s):
+    formats = {
+        "{track-name}"   : metadata["name"],
+        "{artist}"       : metadata["artists"][0]["name"],
+        "{album}"        : metadata["album"]["name"],
+        "{album-artist}" : metadata["artists"][0]["name"],
+        "{genre}"        : metadata["genre"],
+        "{disc-number}"  : metadata["disc_number"],
+        "{duration}"     : metadata["duration"],
+        "{year}"         : metadata["year"],
+        "{original-date}": metadata["release_date"],
+        "{track-number}" : metadata["track_number"],
+        "{total-tracks}" : metadata["total_tracks"],
+        "{isrc}"         : metadata["external_ids"]["isrc"],
+        # TODO: Call `str.zfill` fill on track-id
+        "{track-id}"     : metadata.get("id", ""),
+        "{output-ext}"   : output_extension,
+    }
+
+    for key, value in formats.items():
+        string = string.replace(key, sanitizer(str(value)))
+
+    return string
+