Move tweet formatting into a separate helper class

app/helpers/social_helper.rb

@@ -0,0 +1,4 @@
+module SocialHelper
+  include SocialHelper::TwitterMethods
+  include SocialHelper::TumblrMethods
+end

app/helpers/social_helper/twitter_methods.rb

@@ -0,0 +1,38 @@
+require 'cgi'
+
+module SocialHelper::TwitterMethods
+  include Rails.application.routes.url_helpers
+  include MarkdownHelper
+
+  def prepare_tweet(answer)
+    question_content = twitter_markdown answer.question.content.gsub(/\@(\w+)/, '\1')
+    original_question_length = question_content.length
+    answer_content = twitter_markdown answer.content
+    original_answer_length = answer_content.length
+    answer_url = show_user_answer_url(
+      id: answer.id,
+      username: answer.user.screen_name,
+      host: APP_CONFIG['hostname'],
+      protocol: (APP_CONFIG['https'] ? :https : :http)
+    )
+
+    parsed_tweet = { :valid => false }
+    tweet_text = ""
+
+    until parsed_tweet[:valid]
+      tweet_text = "#{question_content[0..122]}#{'…' if original_question_length > [123, question_content.length].min}" \
+        " — #{answer_content[0..123]}#{'…' if original_answer_length > [124, answer_content.length].min} #{answer_url}"
+
+      parsed_tweet = Twitter::TwitterText::Validation::parse_tweet(tweet_text)
+
+      question_content = question_content[0..-2]
+      answer_content = answer_content[0..-2]
+    end
+
+    tweet_text
+  end
+
+  def twitter_share_url(answer)
+    "https://twitter.com/intent/tweet?text=#{CGI.escape(prepare_tweet(answer))}"
+  end
+end

app/models/services/twitter.rb

@@ -1,6 +1,5 @@
 class Services::Twitter < Service
-  include Rails.application.routes.url_helpers
-  include MarkdownHelper
+  include SocialHelper::TwitterMethods
 
   def provider
     "twitter"
@@ -25,32 +24,4 @@ class Services::Twitter < Service
     def post_tweet(answer)
       client.update! prepare_tweet(answer)
     end
-
-    def prepare_tweet(answer)
-      question_content = twitter_markdown answer.question.content.gsub(/\@(\w+)/, '\1')
-      original_question_length = question_content.length
-      answer_content = twitter_markdown answer.content
-      original_answer_length = answer_content.length
-      answer_url = show_user_answer_url(
-        id: answer.id,
-        username: answer.user.screen_name,
-        host: APP_CONFIG['hostname'],
-        protocol: (APP_CONFIG['https'] ? :https : :http)
-      )
-
-      parsed_tweet = { :valid => false }
-      tweet_text = ""
-
-      until parsed_tweet[:valid]
-        tweet_text = "#{question_content[0..122]}#{'…' if original_question_length > [123, question_content.length].min}" \
-          " — #{answer_content[0..123]}#{'…' if original_answer_length > [124, answer_content.length].min} #{answer_url}"
-
-        parsed_tweet = Twitter::TwitterText::Validation::parse_tweet(tweet_text)
-
-        question_content = question_content[0..-2]
-        answer_content = answer_content[0..-2]
-      end
-
-      tweet_text
-    end
 end