resizing images for better performance

_plugins/image-reference-update.rb

@@ -1,10 +1,13 @@
 require 'uri'
 require 'faraday'
 require 'yaml'
+require 'mini_magick'
 
 class Localizer
 
   IMAGE_FIELDS = ["media_artist_url"]
+  RESIZED_SUFIX = "_resized.png"
+  IMAGES_FOLDER = File.dirname(File.dirname(__FILE__))+'/images/'
 
   attr_reader :post_directory, :image_directory
 
@@ -74,26 +77,54 @@ class Localizer
 
       image_url = talk[image_field]
 
-      next unless !image_url.nil? && (image_url.start_with?('http') || image_url.start_with?('https'))
+      if !image_url.nil?
 
-      local_image = local_image_filename(image_url)
+        # Download image if it is on the internet
+        if image_url.start_with?('http') || image_url.start_with?('https')
+          local_image = local_image_filename(image_url)
+
+          begin
+            ensure_local_image(image_url, local_image)
+          rescue
+            puts "Error downloading locally for image: #{image_url}"
+            next
+          end
+        else
+          puts "Skipping downloading of image: #{image_url}"
+        end
+
+        # Create resized version if it does not existZ
+        if !(image_url.end_with? RESIZED_SUFIX)
+          local_image = image_url + RESIZED_SUFIX
+          resized_url = File.basename(image_url) + RESIZED_SUFIX
+          image_path = IMAGES_FOLDER + File.basename(resized_url)
+          if !File.file?(image_path)
+            image_to_resize = MiniMagick::Image.open(IMAGES_FOLDER + File.basename(image_url))
+            image_to_resize.resize('612x612')
+            image_to_resize.format "png"
+            image_to_resize.write(image_path)
+            local_image = File.basename(resized_url)
+          else
+            puts "Skipping resizing of image: #{resized_url}"
+          end
+        end
+
+        # Replace relative url on markdown file
+        if !local_image.nil? && image_url != local_image
+          contents = contents.gsub(image_url,local_image)
+        end
 
-      begin
-        ensure_local_image(image_url, local_image)
-      rescue
-        puts "Error downloading locally for image: #{image_url}"
-        next
       end
 
-      # talk[image_field] = local_image
-      contents = contents.gsub(image_url,"/"+local_image)
-
      end
     end
 
+    puts(file)
+
     # Step 3: replace the file itself
     File.unlink(file)
     File.open(file, "w", encoding: "UTF-8") { |file| file.puts contents }
+
   end
 
 end