style(gitalk): gitalk.ejs code optimization

layout/_partial/comment/gitalk.ejs

@@ -1,9 +1,11 @@
+<% const { client_id, client_secret, repository, github_id, github_admins } = theme.comment.gitalk %>
+
 <% if(
         theme.comment.use === 'gitalk'
-        && theme.comment.gitalk.client_id
-        && theme.comment.gitalk.client_secret
-        && theme.comment.gitalk.github_id
-        && theme.comment.gitalk.repository
+        && client_id
+        && client_secret
+        && github_id
+        && repository
 ) { %>
     <div id="gitalk-container"></div>
     <script <%= theme.pjax.enable === true ? 'data-pjax' : '' %>
@@ -19,12 +21,13 @@
         }
 
         try {
+
           Gitalk && new Gitalk({
-                    clientID: '<%= theme.comment.gitalk.client_id %>',
-                    clientSecret: '<%= theme.comment.gitalk.client_secret %>',
-                    repo: '<%= theme.comment.gitalk.repository %>',
-                    owner: '<%= theme.comment.gitalk.github_id %>',
-                    admin: <% if (theme.comment.gitalk.github_admins) { %><%= theme.comment.gitalk.github_admins %><% } else { %>['<%= theme.comment.gitalk.github_id %>']<% } %>,
+            clientID: '<%= client_id %>',
+            clientSecret: '<%= client_secret %>',
+            repo: '<%= repository %>',
+            owner: '<%= github_id %>',
+            admin: '<%= github_admins || [github_id] %>',
             id: __gitalk__pathname,
             language: '<%= config.language %>'
           }).render('gitalk-container');