Fix wrongful error after clearing cache

changelog.md

@@ -1,5 +1,8 @@
 # Changelog
 
+## Unreleased
+* Fix wrongful error after clearing cache
+
 ## 6.1.5 (2024-07-16)
 * Fix programme of multi-day package
 

src/Transient.php

@@ -6,10 +6,13 @@ class Transient
     private const BASE = 'recras_';
 
     /**
-     * Delete a transient. Returns 0 for success, 1 for error for easy error counting
+     * Delete a transient. Returns 0 for success/not existing, 1 for error for easy error counting
      */
     public function delete(string $name): int
     {
+        if (!$this->get($name)) {
+            return 0;
+        }
         return (delete_transient(self::BASE . $name) ? 0 : 1);
     }
 

src/admin/cache.php

@@ -1,18 +1,18 @@
 <?php
     if (isset($_GET['msg'])) {
-        //if ($_GET['msg'] === 'success') {
+        if ($_GET['msg'] === 'success') {
 ?>
 <div class="updated notice">
     <p><?php _e('The cache was cleared.'); ?></p>
 </div>
 <?php
-        /*} elseif ($_GET['msg'] === 'error') {
+        } elseif ($_GET['msg'] === 'error') {
             ?>
 <div class="error notice">
     <p><?php _e('The selected cache could not be cleared. This could be an error, or there could be nothing to clear.'); ?></p>
 </div>
             <?php
-        }*/
+        }
     }
 ?>