From 07aeced68e5aa24f3e2562aa7cb9ddd2f11b59ca Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sergey=20M=E2=80=A4?= <dstftw@gmail.com>
Date: Tue, 19 Dec 2017 03:51:28 +0700
Subject: [PATCH] [youtube] Extract uploader, uploader_id and uploader_url for
 playlists (#11427, #15018)

---
 youtube_dl/extractor/youtube.py | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/youtube_dl/extractor/youtube.py b/youtube_dl/extractor/youtube.py
index 9943dddc1..0919bef0e 100644
--- a/youtube_dl/extractor/youtube.py
+++ b/youtube_dl/extractor/youtube.py
@@ -2270,6 +2270,19 @@ def _extract_playlist(self, playlist_id):
             r'(?s)<h1 class="pl-header-title[^"]*"[^>]*>\s*(.*?)\s*</h1>',
             page, 'title', default=None)
 
+        _UPLOADER_BASE = r'class=["\']pl-header-details[^>]+>\s*<li>\s*<a[^>]+\bhref='
+        uploader = self._search_regex(
+            r'%s["\']/(?:user|channel)/[^>]+>([^<]+)' % _UPLOADER_BASE,
+            page, 'uploader', default=None)
+        mobj = re.search(
+            r'%s(["\'])(?P<path>/(?:user|channel)/(?P<uploader_id>.+?))\1' % _UPLOADER_BASE,
+            page)
+        if mobj:
+            uploader_id = mobj.group('uploader_id')
+            uploader_url = compat_urlparse.urljoin(url, mobj.group('path'))
+        else:
+            uploader_id = uploader_url = None
+
         has_videos = True
 
         if not playlist_title:
@@ -2280,8 +2293,15 @@ def _extract_playlist(self, playlist_id):
             except StopIteration:
                 has_videos = False
 
-        return has_videos, self.playlist_result(
+        playlist = self.playlist_result(
             self._entries(page, playlist_id), playlist_id, playlist_title)
+        playlist.update({
+            'uploader': uploader,
+            'uploader_id': uploader_id,
+            'uploader_url': uploader_url,
+        })
+
+        return has_videos, playlist
 
     def _check_download_just_video(self, url, playlist_id):
         # Check if it's a video-specific URL