From a8ed12e57383b86545fab16e027d8b1dcdcb32d0 Mon Sep 17 00:00:00 2001
From: Capevace <capevace@gmail.com>
Date: Wed, 9 Aug 2017 17:40:26 +0200
Subject: [PATCH] Added notice when Yoast SEO is missing.

---
 admin/menu.php | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/admin/menu.php b/admin/menu.php
index 024ba8b..0daebf9 100644
--- a/admin/menu.php
+++ b/admin/menu.php
@@ -16,13 +16,23 @@ function ymme_admin_menu() {
 }
 
 function ymme_editor_page() {
-  include_once dirname(WP_YMME).'/admin/views/editor.php';
+  if (is_plugin_active('wordpress-seo/wp-seo.php'))
+    include_once dirname(WP_YMME).'/admin/views/editor.php';
+  else
+    ymme_yoast_missing_notice();
 }
 
 function ymme_admin_dependencies($hook) {
   if($hook !== 'tools_page_ymme/editor') {
     return;
   }
-
-  
 }
+
+function ymme_yoast_missing_notice() {
+  ?>
+    <div class="notice notice-error" style="margin-left: 2px;"> 
+      <h3>The Yoast SEO plugin is not installed/active.</h3>
+      <p>To use <code>Mass Meta Editor</code>, you need to install the Yoast SEO plugin.</p>
+    </div>
+  <?php
+}
\ No newline at end of file