Fix posts merging option.

event/listener.php

@@ -156,7 +156,7 @@ public function viewtopic_modify_data($event)
 
 			$this->helper->form_helper->prepare_qr_form($forum_id, $topic_id);
 
-			$this->helper->assign_template_variables_for_qr($forum_id);
+			$this->helper->assign_template_variables_for_qr($forum_id, $topic_id);
 
 			$add_re = ($this->config['qr_enable_re']) ? 'Re: ' : '';
 			$this->template->assign_var('SUBJECT', $this->request->variable('subject', $add_re . censor_text($topic_data['topic_title']), true));

functions/listener_helper.php

@@ -258,13 +258,14 @@ public function set_form_parameters($forum_id, $topic_data, $qr_hidden_fields)
 	 * Assign template variables if quick reply is enabled
 	 *
 	 * @param int $forum_id Forum ID
+	 * @param int $topic_id Topic ID
 	 */
-	public function assign_template_variables_for_qr($forum_id)
+	public function assign_template_variables_for_qr($forum_id, $topic_id)
 	{
 		$this->template_variables_for_qr($forum_id);
-		$this->template_variables += $this->form_helper->form_template_variables;
-		$this->template_variables += $this->plugins_helper->template_variables_for_plugins($forum_id);
-		$this->template_variables += $this->plugins_helper->template_variables_for_extensions();
+		$this->template_variables += $this->form_helper->form_template_variables
+			+ $this->plugins_helper->template_variables_for_plugins($forum_id)
+			+ $this->plugins_helper->template_variables_for_extensions($forum_id, $topic_id);
 
 		$this->template->assign_vars($this->template_variables);
 	}

functions/plugins_helper.php

@@ -39,16 +39,49 @@ public function __construct(\phpbb\auth\auth $auth, \phpbb\config\config $config
 		$this->phpbb_extension_manager = $phpbb_extension_manager;
 	}
 
+	/**
+	 * Returns whether posts merging is allowed in current topic.
+	 * Used only when PostsMerging extension is enabled.
+	 *
+	 * @param int $forum_id Current forum ID
+	 * @param int $topic_id Current topic ID
+	 * @return bool
+	 */
+	private function posts_merging_allowed($forum_id, $topic_id)
+	{
+		return $this->auth->acl_get('u_postsmerging') &&
+			$this->auth->acl_get('u_postsmerging_ignore') &&
+			$this->auth->acl_get('f_noapprove', $forum_id) &&
+			!$this->excluded_from_merge($forum_id, $topic_id);
+	}
+
+	/**
+	 * Returns whether the current topic is excluded from posts merging.
+	 * Used only when PostsMerging extension is enabled.
+	 *
+	 * @param int $forum_id Current forum ID
+	 * @param int $topic_id Current topic ID
+	 * @return bool
+	 */
+	private function excluded_from_merge($forum_id, $topic_id)
+	{
+		return (in_array($forum_id, explode(',', $this->config['merge_no_forums']))
+			|| in_array($topic_id, explode(',', $this->config['merge_no_topics'])));
+	}
+
 	/**
 	 * Returns template variables for supported extensions for quick reply.
 	 *
+	 * @param int $forum_id Current forum ID
+	 * @param int $topic_id Current topic ID
 	 * @return array
 	 */
-	public function template_variables_for_extensions()
+	public function template_variables_for_extensions($forum_id, $topic_id)
 	{
 		$template_variables = array();
 		if (
 			$this->phpbb_extension_manager->is_enabled('rxu/PostsMerging') &&
+			$this->posts_merging_allowed($forum_id, $topic_id) &&
 			$this->user->data['is_registered'] &&
 			$this->config['merge_interval']
 		)