allow end user to recover a post they delete

automatically delete stubs after 1 day

lib/post_destroyer.rb

@@ -4,6 +4,13 @@
 #
 class PostDestroyer
 
+  def self.destroy_stubs
+    Post.where(deleted_at: nil, user_deleted: true)
+        .where('updated_at < ? AND post_number > 1', 1.day.ago).each do |post|
+      PostDestroyer.new(Discourse.system_user, post).destroy
+    end
+  end
+
   def initialize(user, post)
     @user, @post = user, post
   end
@@ -16,6 +23,19 @@ class PostDestroyer
     end
   end
 
+  def recover
+    if @user.staff? && @post.deleted_at
+      staff_recovered
+    elsif @user.staff? || @user.id == @post.user_id
+      user_recovered
+    end
+    @post.topic.update_statistics
+  end
+
+  def staff_recovered
+    @post.recover!
+  end
+
   # When a post is properly deleted. Well, it's still soft deleted, but it will no longer
   # show up in the topic
   def staff_destroyed
@@ -75,4 +95,12 @@ class PostDestroyer
     end
   end
 
+  def user_recovered
+    Post.transaction do
+      @post.update_column(:user_deleted, false)
+      @post.revise(@user, @post.versions.last.modifications["raw"][0], force_new_version: true)
+      @post.update_flagged_posts_count
+    end
+  end
+
 end