nicoseiga: fix page_url method not to return seiga.nicovideo.jp/image/source/:id urls.

Fix the page_url method not to return URLs like this:

    https://seiga.nicovideo.jp/image/source/8017978 (page: https://seiga.nicovideo.jp/watch/mg310193)

These are direct image URLs, not page URLs. It's not generally possible
to get to the page URL from an image URL like this.

This fixes it so that we don't incorrectly set the source of NicoSeiga
uploads to the image URL.

app/logical/source/url/nico_seiga.rb

@@ -63,9 +63,12 @@ module Source
         @image_id = params[:id]
 
       # https://lohas.nicoseiga.jp/o/971eb8af9bbcde5c2e51d5ef3a2f62d6d9ff5552/1589933964/3583893 (page: https://seiga.nicovideo.jp/seiga/im3583893)
+      in "lohas.nicoseiga.jp", "o", *, /^\d+$/ => illust_id
+        @illust_id = illust_id
+
       # https://lohas.nicoseiga.jp/priv/b80f86c0d8591b217e7513a9e175e94e00f3c7a1/1384936074/3583893 (page: https://seiga.nicovideo.jp/seiga/im3583893)
       # https://lohas.nicoseiga.jp/priv/3521156?e=1382558156&h=f2e089256abd1d453a455ec8f317a6c703e2cedf (page: https://seiga.nicovideo.jp/seiga/im3521156)
-      in "lohas.nicoseiga.jp", ("priv" | "o"), *, /^\d+$/ => image_id
+      in "lohas.nicoseiga.jp", "priv", *, /^\d+$/ => image_id
         @image_id = image_id
 
       # https://lohas.nicoseiga.jp/thumb/2163478i (page: https://seiga.nicovideo.jp/seiga/im2163478, image: https://lohas.nicoseiga.jp/priv/2e76be4c553c571b5a81e6ea1a69ab1367f02a41/1646904833/2163478)
@@ -76,7 +79,7 @@ module Source
 
       # https://lohas.nicoseiga.jp/thumb/4744553p (page: https://seiga.nicovideo.jp/watch/mg122274, image: https://lohas.nicoseiga.jp/priv/49807693c31ed226818b9167e8e87561dd19a445/1646904643/4744553)
       in "lohas.nicoseiga.jp", "thumb", /^(\d+)p$/ => image_id
-        @illust_id = $1
+        @image_id = $1
 
       # https://dcdn.cdn.nimg.jp/priv/62a56a7f67d3d3746ae5712db9cac7d465f4a339/1592186183/10466669
       # https://dcdn.cdn.nimg.jp/nicoseiga/lohas/o/8ba0a9b2ea34e1ef3b5cc50785bd10cd63ec7e4a/1592187477/10466669
@@ -146,8 +149,8 @@ module Source
         "https://seiga.nicovideo.jp/seiga/im#{illust_id}"
       elsif manga_id.present?
         "https://seiga.nicovideo.jp/watch/mg#{manga_id}"
-      elsif image_id.present?
+      #elsif image_id.present?
-        "https://seiga.nicovideo.jp/image/source/#{image_id}"
+      #  "https://seiga.nicovideo.jp/image/source/#{image_id}"
       end
     end
   end

test/unit/sources/nico_seiga_test.rb

@@ -54,7 +54,7 @@ module Sources
       end
 
       should "get the page url" do
-        assert_equal("https://seiga.nicovideo.jp/image/source/4937663", @site_1.page_url)
+        assert_equal("https://seiga.nicovideo.jp/seiga/im4937663", @site_1.page_url)
         assert_equal("https://seiga.nicovideo.jp/seiga/im4937663", @site_2.page_url)
         assert_equal("https://seiga.nicovideo.jp/watch/mg470189", @site_3.page_url)
       end
@@ -166,10 +166,10 @@ module Sources
         source3 = "http://lohas.nicoseiga.jp/o/910aecf08e542285862954017f8a33a8c32a8aec/1433298801/4937663"
         source4 = "http://seiga.nicovideo.jp/image/source?id=3312222"
 
-        assert_equal("https://seiga.nicovideo.jp/image/source/3521156", Source::URL.page_url(source1))
+        assert_nil(Source::URL.page_url(source1))
-        assert_equal("https://seiga.nicovideo.jp/image/source/3583893", Source::URL.page_url(source2))
+        assert_nil(Source::URL.page_url(source2))
-        assert_equal("https://seiga.nicovideo.jp/image/source/4937663", Source::URL.page_url(source3))
+        assert_equal("https://seiga.nicovideo.jp/seiga/im4937663", Source::URL.page_url(source3))
-        assert_equal("https://seiga.nicovideo.jp/image/source/3312222", Source::URL.page_url(source4))
+        assert_nil(Source::URL.page_url(source4))
         assert_nil(Source::URL.page_url("https://seiga.nicovideo.jp"))
       end
     end