[tags] Add tags to scrobble media models

vrobbler/apps/books/constants.py

@@ -1,4 +1,5 @@
 #!/usr/bin/env python3
+from enum import Enum
 
 BOOKS_TITLES_TO_IGNORE = [
     "KOReader Quickstart Guide",
@@ -7,3 +8,16 @@ BOOKS_TITLES_TO_IGNORE = [
 ]
 
 READCOMICSONLINE_URL = "https://readcomicsonline.ru"
+
+
+class MediaSourceTag(str, Enum):
+    OPENLIBRARY = "source_openlibrary"
+    GOOGLE_BOOKS = "source_google_books"
+    COMICVINE = "source_comicvine"
+    LOCG = "source_locg"
+    KOREADER = "source_koreader"
+    SEMANTIC_SCHOLAR = "source_semantic_scholar"
+
+    @classmethod
+    def choices(cls):
+        return [(tag.value, tag.name.replace("_", " ").title()) for tag in cls]