Add warning when Pixiv post is a gallery of multiple images

app/logical/sources/site.rb

@@ -1,7 +1,7 @@
 module Sources
   class Site
     attr_reader :url, :strategy
-    delegate :get, :referer_url, :site_name, :artist_name, :profile_url, :image_url, :tags, :artist_record, :unique_id, :to => :strategy
+    delegate :get, :referer_url, :site_name, :artist_name, :profile_url, :image_url, :tags, :artist_record, :unique_id, :page_count, :to => :strategy
 
     def self.strategies
       [Strategies::Pixiv, Strategies::NicoSeiga, Strategies::DeviantArt, Strategies::Nijie]
@@ -31,7 +31,8 @@ module Sources
         :translated_tags => translated_tags,
         :danbooru_name => artist_record.try(:first).try(:name),
         :danbooru_id => artist_record.try(:first).try(:id),
-        :unique_id => unique_id
+        :unique_id => unique_id,
+        :page_count => page_count
       }.to_json
     end
 

app/logical/sources/strategies/base.rb

@@ -2,7 +2,7 @@ module Sources
   module Strategies
     class Base
       attr_reader :url
-      attr_reader :artist_name, :profile_url, :image_url, :tags
+      attr_reader :artist_name, :profile_url, :image_url, :tags, :page_count
 
       def self.url_match?(url)
         false
@@ -10,6 +10,7 @@ module Sources
 
       def initialize(url)
         @url = url
+        @page_count = 1
       end
 
       # No remote calls are made until this method is called.

app/logical/sources/strategies/pixiv.rb

@@ -29,6 +29,7 @@ module Sources
           @artist_name, @profile_url = get_profile_from_page(page)
           @image_url = get_image_url_from_page(page)
           @tags = get_tags_from_page(page)
+          @page_count = get_page_count_from_page(page)
         end
       end
 
@@ -81,6 +82,19 @@ module Sources
         end
       end
 
+      def get_page_count_from_page(page)
+        elements = page.search("ul.meta li").find_all do |node|
+          node.text =~ /Manga/
+        end
+
+        if elements.any?
+          elements[0].text =~ /Manga (\d+)P/
+          $1.to_i
+        else
+          1
+        end
+      end
+
       def normalized_url
         @normalized_url ||= begin
           if url =~ /\/(\d+)(?:_big)?(?:_m|_p\d+)?\.(?:jpg|jpeg|png|gif)/i