[extractors/holodex] Add extractor (#4434)

Closes #726 
Authored by: sqrtNOT, pukkandan

yt_dlp/extractor/_extractors.py

@@ -641,6 +641,7 @@
 from .historicfilms import HistoricFilmsIE
 from .hitbox import HitboxIE, HitboxLiveIE
 from .hitrecord import HitRecordIE
+from .holodex import HolodexIE
 from .hotnewhiphop import HotNewHipHopIE
 from .hotstar import (
     HotStarIE,

yt_dlp/extractor/holodex.py

@@ -0,0 +1,100 @@
+from .common import InfoExtractor
+from .youtube import YoutubeIE
+from ..utils import traverse_obj
+
+
+class HolodexIE(InfoExtractor):
+    _VALID_URL = r'''(?x)https?://(?:www\.|staging\.)?holodex\.net/(?:
+            api/v2/playlist/(?P<playlist>\d+)|
+            watch/(?P<id>\w+)(?:\?(?:[^#]+&)?playlist=(?P<playlist2>\d+))?
+        )'''
+    _TESTS = [{
+        'url': 'https://holodex.net/watch/9kQ2GtvDV3s',
+        'md5': 'be5ffce2f0feae8ba4c01553abc0f175',
+        'info_dict': {
+            'ext': 'mp4',
+            'id': '9kQ2GtvDV3s',
+            'title': '【おちゃめ機能】ホロライブが吹っ切れた【24人で歌ってみた】',
+            'channel_id': 'UCJFZiqLMntJufDCHc6bQixg',
+            'playable_in_embed': True,
+            'tags': 'count:43',
+            'age_limit': 0,
+            'live_status': 'not_live',
+            'description': 'md5:040e866c09dc4ab899b36479f4b7c7a2',
+            'channel_url': 'https://www.youtube.com/channel/UCJFZiqLMntJufDCHc6bQixg',
+            'upload_date': '20200406',
+            'uploader_url': 'http://www.youtube.com/channel/UCJFZiqLMntJufDCHc6bQixg',
+            'view_count': int,
+            'channel': 'hololive ホロライブ - VTuber Group',
+            'categories': ['Music'],
+            'uploader': 'hololive ホロライブ - VTuber Group',
+            'channel_follower_count': int,
+            'uploader_id': 'UCJFZiqLMntJufDCHc6bQixg',
+            'availability': 'public',
+            'thumbnail': 'https://i.ytimg.com/vi_webp/9kQ2GtvDV3s/maxresdefault.webp',
+            'duration': 263,
+            'like_count': int,
+        },
+    }, {
+        'url': 'https://holodex.net/api/v2/playlist/239',
+        'info_dict': {
+            'id': '239',
+            'title': 'Songs/Videos that made fall into the rabbit hole (from my google activity history)',
+        },
+        'playlist_count': 14,
+    }, {
+        'url': 'https://holodex.net/watch/_m2mQyaofjI?foo=bar&playlist=69',
+        'info_dict': {
+            'id': '69',
+            'title': '拿著金斧頭的藍髮大姊姊'
+        },
+        'playlist_count': 3,
+    }, {
+        'url': 'https://holodex.net/watch/_m2mQyaofjI?playlist=69',
+        'info_dict': {
+            'id': '_m2mQyaofjI',
+            'ext': 'mp4',
+            'playable_in_embed': True,
+            'like_count': int,
+            'uploader': 'Ernst / エンスト',
+            'duration': 11,
+            'uploader_url': 'http://www.youtube.com/channel/UCqSX4PPZY0cyetqKVY_wRVA',
+            'categories': ['Entertainment'],
+            'title': '【星街すいせい】星街向你獻上晚安',
+            'upload_date': '20210705',
+            'description': 'md5:8b8ffb157bae77f2d109021a0b577d4a',
+            'channel': 'Ernst / エンスト',
+            'channel_id': 'UCqSX4PPZY0cyetqKVY_wRVA',
+            'channel_follower_count': int,
+            'view_count': int,
+            'tags': [],
+            'live_status': 'not_live',
+            'channel_url': 'https://www.youtube.com/channel/UCqSX4PPZY0cyetqKVY_wRVA',
+            'availability': 'public',
+            'thumbnail': 'https://i.ytimg.com/vi_webp/_m2mQyaofjI/maxresdefault.webp',
+            'age_limit': 0,
+            'uploader_id': 'UCqSX4PPZY0cyetqKVY_wRVA',
+            'comment_count': int,
+        },
+        'params': {'noplaylist': True},
+    }, {
+        'url': 'https://staging.holodex.net/api/v2/playlist/125',
+        'only_matching': True,
+    }, {
+        'url': 'https://staging.holodex.net/watch/rJJTJA_T_b0?playlist=25',
+        'only_matching': True,
+    }, {
+        'url': 'https://staging.holodex.net/watch/s1ifBeukThg',
+        'only_matching': True,
+    }]
+
+    def _real_extract(self, url):
+        video_id, playlist_id, pl_id2 = self._match_valid_url(url).group('id', 'playlist', 'playlist2')
+        playlist_id = playlist_id or pl_id2
+
+        if not self._yes_playlist(playlist_id, video_id):
+            return self.url_result(f'https://www.youtube.com/watch?v={video_id}', YoutubeIE)
+
+        data = self._download_json(f'https://holodex.net/api/v2/playlist/{playlist_id}', playlist_id)
+        return self.playlist_from_matches(
+            traverse_obj(data, ('videos', ..., 'id')), playlist_id, data.get('name'), ie=YoutubeIE)