feat: add images related functions

lib/jekyll-spaceship/cores/processor.rb

@@ -192,5 +192,38 @@ module Jekyll::Spaceship
       end
       content
     end
+
+    def self.fetch_img_data(url)
+      begin
+        res = Net::HTTP.get_response URI(url)
+        raise res.body unless res.is_a?(Net::HTTPSuccess)
+        content_type = res.header['Content-Type']
+        raise 'Unknown content type!' if content_type.nil?
+        content_body = res.body.force_encoding('UTF-8')
+        return {
+          'type' => content_type,
+          'body' => content_body
+        }
+      rescue StandardError => msg
+        logger.log msg
+      end
+    end
+
+    def self.make_img_tag(data)
+      css_class = data['class']
+      type = data['type']
+      body = data['body']
+      if type == 'url'
+        "<img class=\"#{css_class}\" src=\"#{body}\">"
+      elsif type.include?('svg')
+        body.gsub(/\<\?xml.*?\?>/, '')
+          .gsub(/<!--[^\0]*?-->/, '')
+          .sub(/<svg /, "<svg class=\"#{css_class}\" ")
+      else
+        body = Base64.encode64(body)
+        body = "data:#{type};base64, #{body}"
+        "<img class=\"#{css_class}\" src=\"#{body}\">"
+      end
+    end
   end
 end