[e621] add 'artist' & 'artist-search' extractors (#8448)

gallery_dl/extractor/e621.py

@@ -57,6 +57,12 @@ class E621Extractor(danbooru.DanbooruExtractor):
             yield Message.Directory, post
             yield Message.Url, file["url"], post
 
+    def items_artists(self):
+        for artist in self.artists():
+            artist["_extractor"] = E621TagExtractor
+            url = f"{self.root}/posts?tags={text.quote(artist['name'])}"
+            yield Message.Queue, url, artist
+
     def _get_notes(self, id):
         return self.request_json(
             f"{self.root}/notes.json?search[post_id]={id}")
@@ -136,6 +142,25 @@ class E621PopularExtractor(E621Extractor, danbooru.DanbooruPopularExtractor):
         return self._pagination("/popular.json", self.params)
 
 
+class E621ArtistExtractor(E621Extractor, danbooru.DanbooruArtistExtractor):
+    """Extractor for e621 artists"""
+    subcategory = "artist"
+    pattern = rf"{BASE_PATTERN}/artists/(\d+)"
+    example = "https://e621.net/artists/12345"
+
+    items = E621Extractor.items_artists
+
+
+class E621ArtistSearchExtractor(E621Extractor,
+                                danbooru.DanbooruArtistSearchExtractor):
+    """Extractor for e621 artist searches"""
+    subcategory = "artist-search"
+    pattern = rf"{BASE_PATTERN}/artists/?\?([^#]+)"
+    example = "https://e621.net/artists?QUERY"
+
+    items = E621Extractor.items_artists
+
+
 class E621FavoriteExtractor(E621Extractor):
     """Extractor for e621 favorites"""
     subcategory = "favorite"