Fix #4150: Nijie strategy fails for mp4 files.

app/logical/sources/strategies/nijie.rb

@@ -50,6 +50,7 @@ module Sources
 
       # https://pic03.nijie.info/nijie_picture/28310_20131101215959.jpg
       # https://pic03.nijie.info/nijie_picture/236014_20170620101426_0.png
+      # http://pic.nijie.net/03/nijie_picture/829001_20190620004513_0.mp4
       # https://pic05.nijie.info/nijie_picture/diff/main/559053_20180604023346_1.png
       FILENAME1 = %r!(?<artist_id>\d+)_(?<timestamp>\d{14})(?:_\d+)?!i
 
@@ -77,7 +78,7 @@ module Sources
       end
 
       def image_urls
-        images = page&.search("div#gallery a > img").to_a.map do |img|
+        images = page&.search("div#gallery a > .mozamoza").to_a.map do |img|
           "https:#{img["src"]}"
         end
 

test/unit/sources/nijie_test.rb

@@ -220,6 +220,15 @@ module Sources
       end
     end
 
+    context "An mp4 post" do
+      should "find the mp4 file" do
+        site = Sources::Strategies.find("https://nijie.info/view.php?id=319485")
+
+        assert_equal(["https://pic.nijie.net/03/nijie_picture/829001_20190620004513_0.mp4"], site.image_urls)
+        assert_equal("https://pic.nijie.net/03/nijie_picture/829001_20190620004513_0.mp4", site.image_url)
+      end
+    end
+
     context "An artist profile url" do
       should "not fail" do
         site = Sources::Strategies.find("https://nijie.info/members_illust.php?id=236014")