[books] Add google as a source and clean up data model

vrobbler/apps/books/metadata.py

@@ -0,0 +1,42 @@
+from enum import Enum
+from typing import Optional
+
+import pendulum
+from meta_yt import YouTube
+
+
+YOUTUBE_VIDEO_URL = "https://www.youtube.com/watch?v="
+IMDB_VIDEO_URL = "https://www.imdb.com/title/tt"
+
+
+class BookType:
+    ...
+
+
+class BookMetadata:
+    title: str
+    run_time_seconds: Optional[int]
+    authors = Optional[str]
+    goodreads_id = Optional[str]
+    koreader_data_by_hash = Optional[dict]
+    isbn = Optional[str]
+    # isbn_13 = Optional[str]
+    # isbn_10 = Optional[str]
+    pages = Optional[int]
+    language = Optional[str]
+    first_publish_year = Optional[int]
+    summary = Optional[str]
+
+    # General
+    cover_url: Optional[str]
+    genres: list[str]
+
+    def __init__(self, title: Optional[str] = ""):
+        self.title = title
+
+    def as_dict_with_authors_cover_and_genres(self) -> tuple:
+        book_dict = vars(self)
+        authors = book_dict.pop("authors")
+        cover = book_dict.pop("cover_url")
+        genres = book_dict.pop("genres")
+        return book_dict, authors, cover, genres