#45 差分表示以外完了

backend/app/controllers/wiki_pages_controller.rb

@@ -52,12 +52,17 @@ class WikiPagesController < ApplicationController
 
   def changes
     id = params[:id]
-    log = id.present? ? wiki.page("#{ id }.md").versions : wiki.repo.log('main', nil, max_count: 50)
+    log = id.present? ? wiki.page("#{ id }.md")&.versions : wiki.repo.log('main', nil, max_count: 50)
+    return render json: [] unless log
+
     render json: log.map { |commit|
-        { sha:        commit.id,
-          author:     commit.author.name,
-          message:    commit.message,
-          timestamp:  commit.authored_date } }
+        wiki_page = WikiPage.find(commit.message.split(' ')[1].to_i)
+        user = User.find(commit.author.name.to_i)
+        { sha:          commit.id,
+          wiki_page:    wiki_page && { id: wiki_page.id, title: wiki_page.title },
+          user:         user && { id: user.id, name: user.name },
+          change_type:  commit.message.split(' ')[0].downcase[0...(-1)],
+          timestamp:    commit.authored_date } }
   end
 
   private