Allow undeleting comments

app/controllers/comments_controller.rb

@@ -62,6 +62,15 @@ class CommentsController < ApplicationController
     end
   end
 
+  def undelete
+    @comment = Comment.find(params[:id])
+    check_privilege(@comment)
+    @comment.undelete!
+    respond_with(@comment) do |format|
+      format.js
+    end
+  end
+
   def unvote
     @comment = Comment.find(params[:id])
     @comment.unvote!

app/models/comment.rb

@@ -9,7 +9,7 @@ class Comment < ActiveRecord::Base
   before_validation :initialize_updater
   after_create :update_last_commented_at_on_create
   after_destroy :update_last_commented_at_on_destroy
-  attr_accessible :body, :post_id, :do_not_bump_post
+  attr_accessible :body, :post_id, :do_not_bump_post, :is_deleted
 
   module SearchMethods
     def recent
@@ -175,6 +175,10 @@ class Comment < ActiveRecord::Base
   def delete!
     update_attributes(:is_deleted => true)
   end
+
+  def undelete!
+    update_attributes(:is_deleted => false)
+  end
 end
 
 Comment.connection.extend(PostgresExtensions)

app/views/comments/partials/show/_comment.html.erb

@@ -25,7 +25,11 @@
           <% if @post || @posts %>
             <li><%= link_to "Reply", new_comment_path(:post_id => comment.post_id), :class => "reply-link", "data-comment-id" => comment.id %></li>
             <% if comment.editable_by?(CurrentUser.user) %>
-              <li><%= link_to "Delete", comment_path(comment.id), :data => {:confirm => "Are you sure you want to delete this comment?"}, :method => :delete, :remote => true %></li>
+              <% if comment.is_deleted? %>
+                <li><%= link_to "Undelete", undelete_comment_path(comment.id), :method => :post, :remote => true %></li>
+              <% else %>
+                <li><%= link_to "Delete", comment_path(comment.id), :data => {:confirm => "Are you sure you want to delete this comment?"}, :method => :delete, :remote => true %></li>
+              <% end %>
               <li><%= link_to "Edit", edit_comment_path(comment.id), :id => "edit_comment_link_#{comment.id}", :class => "edit_comment_link" %></li>
             <% end %>
             <li id="comment-vote-up-link-for-<%= comment.id %>"><%= link_to "Vote up", comment_votes_path(:comment_id => comment.id, :score => "up"), :method => :post, :remote => true %></li>

app/views/comments/undelete.js.erb

@@ -0,0 +1 @@
+location.reload();

config/routes.rb

@@ -96,6 +96,7 @@ Rails.application.routes.draw do
     end
     member do
       put :unvote
+      post :undelete
     end
   end
   resources :counts do