UX: Show configurable length excerpt when quoting the solution

assets/javascripts/discourse/initializers/extend-for-solved-button.js.es6

@@ -47,7 +47,8 @@ function acceptPost(post) {
 
   topic.set('accepted_answer', {
     username: post.get('username'),
-    post_number: post.get('post_number')
+    post_number: post.get('post_number'),
+    excerpt: post.get('cooked'),
   });
 
   ajax("/solution/accept", {
@@ -160,7 +161,9 @@ function initializeWithApi(api) {
               <div class='title'>
                 ${topic.get('acceptedAnswerHtml')} <div class="quote-controls"><\/div>
               </div>
-              <blockquote></blockquote>
+              <blockquote>
+                ${topic.get('accepted_answer').excerpt}
+              </blockquote>
             </aside>`
 
           var cooked = new PostCooked({cooked:rawhtml});

config/locales/server.en.yml

@@ -4,6 +4,7 @@ en:
     allow_solved_on_all_topics: "Allow users to select solutions on all topics (by default you control this by editing categories)"
     accept_all_solutions_trust_level: "Minimum trust level required to accept solutions on any topic (even when not OP)"
     empty_box_on_unsolved: "Display an empty box next to unsolved topics"
+    solved_quote_length: "Number of characters to quote when displaying the solution under the first post"
   reports:
     accepted_solutions:
       title: "Accepted solutions"

config/settings.yml

@@ -11,3 +11,7 @@ plugins:
   empty_box_on_unsolved:
     default: false
     client: true
+  solved_quote_length:
+    default: 100
+    client: false
+

plugin.rb

@@ -224,17 +224,22 @@ def accepted_answer
         {
           post_number: info[0],
           username: info[1],
+          excerpt: info[2]
         }
       end
     end
 
     def accepted_answer_post_info
       # TODO: we may already have it in the stream ... so bypass query here
-
-      Post.where(id: accepted_answer_post_id, topic_id: object.topic.id)
-          .joins(:user)
-          .pluck('post_number, username')
-          .first
+      postInfo = Post.where(id: accepted_answer_post_id, topic_id: object.topic.id)
+                 .joins(:user)
+                 .pluck('post_number', 'username', 'cooked')
+                 .first
+
+      if postInfo
+        postInfo[2] = PrettyText.excerpt(postInfo[2], SiteSetting.solved_quote_length)
+        return postInfo
+      end
     end
 
     def accepted_answer_post_id