add memo controller

app/controllers/memos_controller.rb

@@ -1,5 +1,5 @@
 class MemosController < ApplicationController
-  
+  layout "base_memos"
   def new
     @memo = Memo.new
 
@@ -12,6 +12,7 @@ class MemosController < ApplicationController
   def show
     @memo = Memo.find(params[:id])
     @replies = @memo.replies
+    @mome_new = Memo.new
     
     respond_to do |format|
       format.html # show.html.erb
@@ -22,11 +23,24 @@ class MemosController < ApplicationController
   def create
     @memo = Memo.new(params[:memo])
     @memo.author_id = User.current.id
+    @back_memo_id = @memo.id
+
+    if @memo.parent_id
+      @back_memo_id ||= @memo.parent_id
+      @parent_memo = Memo.find_by_id(@memo.parent_id)
+      @parent_memo.replies_count += 1
+    end
 
     respond_to do |format|
       if @memo.save
-        format.html { redirect_to @memo, notice: 'Memo was successfully created.' }
-        format.json { render json: @memo, status: :created, location: @memo }
+        @parent_memo.last_reply_id = @memo.id if @parent_memo
+        if @parent_memo.save
+          format.html { redirect_to forum_memo_path(@memo.forum_id, @back_memo_id), notice: 'Memo was successfully created.' }
+          format.json { render json: @memo, status: :created, location: @memo }
+        else
+          format.html { redirect_to forum_memo_path(@memo.forum_id, @back_memo_id) }
+          format.json { render json: @memo.errors, status: :unprocessable_entity }
+        end
       else
         format.html { render action: "new" }
         format.json { render json: @memo.errors, status: :unprocessable_entity }