#19 ひとまづ表示のみ

backend/app/models/wiki_page.rb

@@ -1,11 +1,34 @@
+require 'gollum-lib'
+
+
 class WikiPage < ApplicationRecord
+  WIKI_PATH = Rails.root.join('wiki').to_s
+
   belongs_to :tag, optional: true
   belongs_to :created_user, class_name: 'User', foreign_key: 'created_user_id'
   belongs_to :updated_user, class_name: 'User', foreign_key: 'updated_user_id'
 
   validates :title, presence: true, length: { maximum: 255 }, uniqueness: true
 
-  def gollum_path
-    "wiki/#{ title.parameterize }.md"
+  def markdown
+    wiki = Gollum::Wiki.new(WIKI_PATH)
+    page = wiki.page(title)
+    page&.raw_data
+  end
+
+  def markdown= content
+    wiki = Gollum::Wiki.new(WIKI_PATH)
+
+    page = wiki.page(title)
+
+    commit_info = { message:  "Update #{ title }",
+                    name:     current_user.id,
+                    email:    'dummy@example.com' }
+
+    if page
+      page.update(content, commit: commit_info)
+    else
+      wiki.write_page(title, :markdown, content, commit_info)
+    end
   end
 end