init

src/WPDesk/Notice/Notice.php

@@ -36,6 +36,18 @@ class Notice
      */
     protected $isDismissible;
 
+    /**
+     * Notice hook priority.
+     * @var int;
+     */
+    protected $priority;
+
+    /**
+     * Is action added?
+     * @var bool
+     */
+    private $isActionAdded = false;
+
     /**
      * Attributes.
      *
@@ -43,6 +55,7 @@ class Notice
      */
     protected $attributes = array();
 
+
     /**
      * WPDesk_Flexible_Shipping_Notice constructor.
      *
@@ -56,7 +69,27 @@ class Notice
         $this->noticeType = $noticeType;
         $this->noticeContent = $noticeContent;
         $this->isDismissible = $isDismissible;
-        add_action('admin_notices', [$this, 'showNotice'], $priority);
+        $this->priority = $priority;
+        $this->addAction();
+    }
+
+    /**
+     * Add notice action.
+     */
+    protected function addAction()
+    {
+        if (!$this->isActionAdded) {
+            add_action('admin_notices', [$this, 'showNotice'], $this->priority);
+            $this->isActionAdded = true;
+        }
+    }
+
+    protected function removeAction()
+    {
+        if ($this->isActionAdded) {
+            remove_action('admin_notices', [$this, 'showNotice'], $this->priority);
+            $this->isActionAdded = false;
+        }
     }
 
     /**

src/WPDesk/Notice/PermanentDismissibleNotice.php

@@ -38,10 +38,19 @@ class PermanentDismissibleNotice extends Notice
         $this->noticeName = $noticeName;
         $this->noticeDismissOptionName = static::OPTION_NAME_PREFIX . $noticeName;
         if (self::OPTION_VALUE_DISMISSED === get_option($this->noticeDismissOptionName, '')) {
-            remove_action('admin_notices', [$this, 'showNotice'], $priority);
+            $this->removeAction();
         }
     }
 
+    /**
+     * Undo dismiss notice.
+     */
+    public function undoDismiss()
+    {
+        delete_option($this->noticeDismissOptionName);
+        $this->addAction();
+    }
+
     /**
      * Get attributes as string.
      *