[discoverygo:playlist] Add extractor (closes #12424)

2 files changed, 59 insertions, 5 deletions

diff --git a/youtube_dl/extractor/discoverygo.py b/youtube_dl/extractor/discoverygo.py
index 2042493a8..d14de8f00 100644
--- a/youtube_dl/extractor/discoverygo.py
+++ b/youtube_dl/extractor/discoverygo.py
@@ -1,17 +1,21 @@
 from __future__ import unicode_literals
 
+import re
+
 from .common import InfoExtractor
 from ..compat import compat_str
 from ..utils import (
     extract_attributes,
+    ExtractorError,
     int_or_none,
     parse_age_limit,
-    ExtractorError,
+    remove_end,
+    unescapeHTML,
 )
 
 
-class DiscoveryGoIE(InfoExtractor):
-    _VALID_URL = r'''(?x)https?://(?:www\.)?(?:
+class DiscoveryGoBaseIE(InfoExtractor):
+    _VALID_URL_TEMPLATE = r'''(?x)https?://(?:www\.)?(?:
             discovery|
             investigationdiscovery|
             discoverylife|
@@ -21,7 +25,11 @@ class DiscoveryGoIE(InfoExtractor):
             sciencechannel|
             tlc|
             velocitychannel
-        )go\.com/(?:[^/]+/)*(?P<id>[^/?#&]+)'''
+        )go\.com/%s(?P<id>[^/?#&]+)'''
+
+
+class DiscoveryGoIE(DiscoveryGoBaseIE):
+    _VALID_URL = DiscoveryGoBaseIE._VALID_URL_TEMPLATE % r'(?:[^/]+/)+'
     _TEST = {
         'url': 'https://www.discoverygo.com/love-at-first-kiss/kiss-first-ask-questions-later/',
         'info_dict': {
@@ -113,3 +121,46 @@ class DiscoveryGoIE(InfoExtractor):
             'formats': formats,
             'subtitles': subtitles,
         }
+
+
+class DiscoveryGoPlaylistIE(DiscoveryGoBaseIE):
+    _VALID_URL = DiscoveryGoBaseIE._VALID_URL_TEMPLATE % ''
+    _TEST = {
+        'url': 'https://www.discoverygo.com/bering-sea-gold/',
+        'info_dict': {
+            'id': 'bering-sea-gold',
+            'title': 'Bering Sea Gold',
+            'description': 'md5:cc5c6489835949043c0cc3ad66c2fa0e',
+        },
+        'playlist_mincount': 6,
+    }
+
+    @classmethod
+    def suitable(cls, url):
+        return False if DiscoveryGoIE.suitable(url) else super(
+            DiscoveryGoPlaylistIE, cls).suitable(url)
+
+    def _real_extract(self, url):
+        display_id = self._match_id(url)
+
+        webpage = self._download_webpage(url, display_id)
+
+        entries = []
+        for mobj in re.finditer(r'data-json=(["\'])(?P<json>{.+?})\1', webpage):
+            data = self._parse_json(
+                mobj.group('json'), display_id,
+                transform_source=unescapeHTML, fatal=False)
+            if not isinstance(data, dict) or data.get('type') != 'episode':
+                continue
+            episode_url = data.get('socialUrl')
+            if not episode_url:
+                continue
+            entries.append(self.url_result(
+                episode_url, ie=DiscoveryGoIE.ie_key(),
+                video_id=data.get('id')))
+
+        return self.playlist_result(
+            entries, display_id,
+            remove_end(self._og_search_title(
+                webpage, fatal=False), ' | Discovery GO'),
+            self._og_search_description(webpage))
diff --git a/youtube_dl/extractor/extractors.py b/youtube_dl/extractor/extractors.py
index bd2762e47..24c478932 100644
--- a/youtube_dl/extractor/extractors.py
+++ b/youtube_dl/extractor/extractors.py
@@ -265,7 +265,10 @@ from .dvtv import DVTVIE
 from .dumpert import DumpertIE
 from .defense import DefenseGouvFrIE
 from .discovery import DiscoveryIE
-from .discoverygo import DiscoveryGoIE
+from .discoverygo import (
+    DiscoveryGoIE,
+    DiscoveryGoPlaylistIE,
+)
 from .disney import DisneyIE
 from .dispeak import DigitallySpeakingIE
 from .dropbox import DropboxIE