Fix html variant image prefix issue + other small fixes (#1005)

app/helpers/application_helper.rb

@@ -106,7 +106,7 @@ module ApplicationHelper
 
     Rails.cache.fetch(cache_key, expires_in: 1.hour) do
       src = GeneratedImage.new(article).social_image
-      return src if src.include? "res.cloudinary"
+      return src if src.start_with? "https://res.cloudinary.com/"
       cl_image_path(src,
         type: "fetch",
         width:  "1000",

app/models/comment.rb

@@ -306,12 +306,12 @@ class Comment < ApplicationRecord
 
   def before_destroy_actions
     bust_cache
-    Comment.delay.comment_async_bust(commentable, user.username)
     remove_algolia_index
     reactions.destroy_all
   end
 
   def bust_cache
+    Comment.delay.comment_async_bust(commentable, user.username)
     expire_root_fragment
     cache_buster = CacheBuster.new
     cache_buster.bust(commentable.path.to_s) if commentable

app/models/html_variant.rb

@@ -24,7 +24,7 @@ class HtmlVariant < ApplicationRecord
   end
 
   def self.find_top_for_test(tags_array)
-    where(group: "article_show_sidebar_cta", approved: true, published: true, target_tag: tags_array).order("success_rate DESC").limit(rand(1..10)).sample
+    where(group: "article_show_sidebar_cta", approved: true, published: true, target_tag: tags_array).order("success_rate DESC").limit(rand(1..15)).sample
   end
 
   def self.find_random_for_test(tags_array)
@@ -45,7 +45,7 @@ class HtmlVariant < ApplicationRecord
     doc.css("img").each do |img|
       src = img.attr("src")
       next unless src
-      # allow image to render as-is
+      next if whitelisted_image_host?(src)
       img["src"] = if giphy_img?(src)
                      src.gsub("https://media.", "https://i.")
                    else
@@ -65,6 +65,10 @@ class HtmlVariant < ApplicationRecord
     uri.path.ends_with?(".gif")
   end
 
+  def whitelisted_image_host?(src)
+    src.start_with?("https://res.cloudinary.com/")
+  end
+
   def img_of_size(source, width = 420)
     quality = if source && (source.include? ".gif")
                 66