Lyrics: Refactor Genius, Google backends, and consolidate common functionality

beetsplug/_typing.py

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+from __future__ import annotations
+
+from typing import Any
+
+from typing_extensions import NotRequired, TypedDict
+
+JSONDict = dict[str, Any]
+
+
+class LRCLibAPI:
+    class Item(TypedDict):
+        """Lyrics data item returned by the LRCLib API."""
+
+        id: int
+        name: str
+        trackName: str
+        artistName: str
+        albumName: str
+        duration: float | None
+        instrumental: bool
+        plainLyrics: str
+        syncedLyrics: str | None
+
+
+class GeniusAPI:
+    """Genius API data types.
+
+    This documents *only* the fields that are used in the plugin.
+    :attr:`SearchResult` is an exception, since I thought some of the other
+    fields might be useful in the future.
+    """
+
+    class DateComponents(TypedDict):
+        year: int
+        month: int
+        day: int
+
+    class Artist(TypedDict):
+        api_path: str
+        header_image_url: str
+        id: int
+        image_url: str
+        is_meme_verified: bool
+        is_verified: bool
+        name: str
+        url: str
+
+    class Stats(TypedDict):
+        unreviewed_annotations: int
+        hot: bool
+
+    class SearchResult(TypedDict):
+        annotation_count: int
+        api_path: str
+        artist_names: str
+        full_title: str
+        header_image_thumbnail_url: str
+        header_image_url: str
+        id: int
+        lyrics_owner_id: int
+        lyrics_state: str
+        path: str
+        primary_artist_names: str
+        pyongs_count: int | None
+        relationships_index_url: str
+        release_date_components: GeniusAPI.DateComponents
+        release_date_for_display: str
+        release_date_with_abbreviated_month_for_display: str
+        song_art_image_thumbnail_url: str
+        song_art_image_url: str
+        stats: GeniusAPI.Stats
+        title: str
+        title_with_featured: str
+        url: str
+        featured_artists: list[GeniusAPI.Artist]
+        primary_artist: GeniusAPI.Artist
+        primary_artists: list[GeniusAPI.Artist]
+
+    class SearchHit(TypedDict):
+        result: GeniusAPI.SearchResult
+
+    class SearchResponse(TypedDict):
+        hits: list[GeniusAPI.SearchHit]
+
+    class Search(TypedDict):
+        response: GeniusAPI.SearchResponse
+
+
+class GoogleCustomSearchAPI:
+    class Response(TypedDict):
+        """Search response from the Google Custom Search API.
+
+        If the search returns no results, the :attr:`items` field is not found.
+        """
+
+        items: NotRequired[list[GoogleCustomSearchAPI.Item]]
+
+    class Item(TypedDict):
+        """A Google Custom Search API result item.
+
+        :attr:`title` field is shown to the user in the search interface, thus
+        it gets truncated with an ellipsis for longer queries. For most
+        results, the full title is available as ``og:title`` metatag found
+        under the :attr:`pagemap` field. Note neither this metatag nor the
+        ``pagemap`` field is guaranteed to be present in the data.
+        """
+
+        title: str
+        link: str
+        pagemap: NotRequired[GoogleCustomSearchAPI.Pagemap]
+
+    class Pagemap(TypedDict):
+        """Pagemap data with a single meta tags dict in a list."""
+
+        metatags: list[JSONDict]