feat: Google Drive Video ifrmae support

Author: rui-reazon99

lib/qiita/markdown.rb

@@ -12,6 +12,7 @@
 require "qiita/markdown/embed/tweet"
 require "qiita/markdown/embed/asciinema"
 require "qiita/markdown/embed/youtube"
+require "qiita/markdown/embed/google_drive_video"
 require "qiita/markdown/embed/slide_share"
 require "qiita/markdown/embed/google_slide"
 require "qiita/markdown/embed/speeker_deck"

lib/qiita/markdown/embed/google_drive_video.rb

@@ -0,0 +1,9 @@
+module Qiita
+  module Markdown
+    module Embed
+      module GoogleDriveVideo
+        SCRIPT_HOST = "drive.google.com".freeze
+      end
+    end
+  end
+end

lib/qiita/markdown/filters/google_drive_video.rb

@@ -0,0 +1,39 @@
+module Qiita
+  module Markdown
+    module Filters
+      class GoogleDriveVideo < ::HTML::Pipeline::Filter
+        GDRIVE_VIDEO_PATTERN = /@\[gdrive_video\]\((?<url>https?:\/\/[^\)]+)\)/
+
+        def call
+          doc.xpath(".//text()").each do |node|
+            content = node.to_html
+            next if !content.match?(GDRIVE_VIDEO_PATTERN)
+            next if has_ancestor?(node, %w(pre code tt))
+
+            html = content.gsub(GDRIVE_VIDEO_PATTERN) do
+              video_url = Regexp.last_match[:url]
+              embed_url = convert_to_embed_url(video_url)
+              if embed_url
+                %(<iframe src="#{embed_url}" width="640" height="480" frameborder="0" allowfullscreen="true"></iframe>)
+              else
+                Regexp.last_match[0]
+            end
+            node.replace(html)
+          end
+          doc
+        end
+
+        private
+
+        def convert_to_embed_url(share_url)
+          if share_url =~ /drive\.google\.com\/file\/d\/([^\/]+)/
+            file_id = $1
+            "https://drive.google.com/file/d/#{file_id}/preview"
+          else
+            nil
+          end
+        end
+      end
+    end
+  end
+end

lib/qiita/markdown/transformers/filter_iframe.rb

@@ -10,6 +10,7 @@ class FilterIframe
           Embed::GoogleSlide::SCRIPT_HOST,
           Embed::Docswell::SCRIPT_HOSTS,
           Embed::Figma::SCRIPT_HOST,
+          Embed::GoogleDriveVideo::SCRIPT_HOST,
         ].flatten.freeze
 
         def self.call(**args)

spec/qiita/markdown/processor_spec.rb

@@ -1520,6 +1520,42 @@
         end
       end
 
+      context "with HTML embed code for Google Drive Video" do
+        shared_examples "embed code googledrive example" do
+          let(:markdown) do
+            <<-MARKDOWN.strip_heredoc
+              <iframe src="#{url}" width="640" height="480" frameborder="0" allowfullscreen="true"></iframe>
+            MARKDOWN
+          end
+          let(:file_id) { "DRIVE_FILE_ID_EXAMPLE" }
+          let(:url) { "#{scheme}//drive.google.com/file/d/#{file_id}/preview" }
+
+          if allowed
+            it "does not sanitize embed code" do
+              should eq <<-HTML.strip_heredoc
+                <iframe src="#{url}" width="640" height="480" frameborder="0" allowfullscreen="true"></iframe>
+              HTML
+            end
+          else
+            it "forces width attribute on iframe" do
+              should eq <<-HTML.strip_heredoc
+                <iframe src="#{url}" width="100%" height="480" frameborder="0" allowfullscreen="true"></iframe>
+              HTML
+            end
+          end
+        end
+
+        context "with scheme" do
+          let(:scheme) { "https:" }
+          include_examples "embed code googledrive example"
+        end
+
+        context "without scheme" do
+          let(:scheme) { "" }
+          include_examples "embed code googledrive example"
+        end
+      end
+      
       context "with HTML embed code for SlideShare" do
         shared_examples "embed code slideshare example" do
           let(:markdown) do