#19 ひとまづ表示のみ

backend/app/controllers/wiki_pages_controller.rb

@@ -1,16 +1,24 @@
 class WikiPagesController < ApplicationController
-  def index
-  end
-
   def show
-  end
-
-  def create
+    p params
+    wiki_page = WikiPage.find_by(title: params[:title])
+    if wiki_page
+      render plain: wiki_page.markdown
+    else
+      head :not_found
+    end
   end
 
   def update
-  end
+    return head :unauthorized unless current_user
 
-  def destroy
+    title = params[:title]
+    wiki_page = WikiPage.find_by(title: title)
+    unless wiki_page
+      wiki_page = WikiPage.new(title: title, created_user: current_user, updated_user: current_user)
+    end
+    wiki_page.markdown = params[:markdown]
+    wiki_page.save!
+    head :ok
   end
 end