From fbdf294dfda5730cfddad3e344239f7092e87398 Mon Sep 17 00:00:00 2001
From: grefog <no>
Date: Sat, 24 Aug 2019 12:57:18 -0600
Subject: [PATCH] Add support for nicovideo.jp Series

---
 youtube_dl/extractor/extractors.py |  6 +++++-
 youtube_dl/extractor/niconico.py   | 31 ++++++++++++++++++++++++++++++
 2 files changed, 36 insertions(+), 1 deletion(-)

diff --git a/youtube_dl/extractor/extractors.py b/youtube_dl/extractor/extractors.py
index 06de556b7..63a6d71cc 100644
--- a/youtube_dl/extractor/extractors.py
+++ b/youtube_dl/extractor/extractors.py
@@ -743,7 +743,11 @@ from .nick import (
     NickNightIE,
     NickRuIE,
 )
-from .niconico import NiconicoIE, NiconicoPlaylistIE
+from .niconico import (
+    NiconicoIE,
+    NiconicoPlaylistIE,
+    NiconicoSeriesIE,
+)
 from .ninecninemedia import NineCNineMediaIE
 from .ninegag import NineGagIE
 from .ninenow import NineNowIE
diff --git a/youtube_dl/extractor/niconico.py b/youtube_dl/extractor/niconico.py
index eb07ca776..aeb3659a3 100644
--- a/youtube_dl/extractor/niconico.py
+++ b/youtube_dl/extractor/niconico.py
@@ -3,6 +3,7 @@ from __future__ import unicode_literals
 
 import json
 import datetime
+import re
 
 from .common import InfoExtractor
 from ..compat import (
@@ -468,3 +469,33 @@ class NiconicoPlaylistIE(InfoExtractor):
             'id': list_id,
             'entries': entries,
         }
+class NiconicoSeriesIE(InfoExtractor):
+    _VALID_URL = r'https?://(?:www\.)?nicovideo\.jp/series/(?P<id>\d+)'
+
+    _TEST = {
+        'url': 'https://www.nicovideo.jp/series/8253',
+        'info_dict': {
+            'id': '8253',
+            'title' : '弦巻マキと結月ゆかりの未確認ゲーム日和',
+        },
+        'playlist_mincount':49,
+    }
+    def _real_extract(self, url):
+        series_id=url.split('/')[-1]
+        webpage=self._download_webpage(url, series_id)
+        entries=re.findall(r'(?<=<a href="\/watch\/)[^"]*',webpage)
+        entries=[{
+            '_type':'url',
+            'ie_key':NiconicoIE.ie_key(),
+
+'url':('https://www.nicovideo.jp/watch/sm%s' %
+                entry),
+        } for entry in entries]
+        return {
+            '_type': 'playlist',
+            'id': u'8253',
+            'entries': entries,
+            'title': self._search_regex(r'bodyTitle">(.*?)</div>',webpage,'title'),
+        }
+
+