client/posts: add post merging

client/js/controllers/base_post_controller.js

@@ -0,0 +1,20 @@
+'use strict';
+
+const api = require('../api.js');
+const topNavigation = require('../models/top_navigation.js');
+const EmptyView = require('../views/empty_view.js');
+
+class BasePostController {
+    constructor(ctx) {
+        if (!api.hasPrivilege('posts:view')) {
+            this._view = new EmptyView();
+            this._view.showError('You don\'t have privileges to view posts.');
+            return;
+        }
+
+        topNavigation.activate('posts');
+        topNavigation.setTitle('Post #' + ctx.parameters.id.toString());
+    }
+}
+
+module.exports = BasePostController;