Fix subscription checkbox state on error in folder subscribe/unsubscribe action (#5243)

CHANGELOG

@@ -18,6 +18,7 @@ CHANGELOG Roundcube Webmail
 - Fix handling of --delete argument in moduserprefs.sh script (#5296)
 - Workaround PHP issue by calling closelog() on script shutdown when using log_driver=syslog (#5289)
 - Fix so upgrade script makes sure program/lib directory does not contain old libraries (#5287)
+- Fix subscription checkbox state on error in folder subscribe/unsubscribe action (#5243)
 
 RELEASE 1.2.0
 -------------

program/js/app.js

@@ -6856,6 +6856,14 @@ function rcube_webmail()
       $('input[name="_subscribed[]"]:first', row).prop('disabled', true);
   };
 
+  // resets state of subscription checkbox (e.g. on error)
+  this.reset_subscription = function(folder, state)
+  {
+    var row = this.subscription_list.get_item(folder, true);
+    if (row)
+      $('input[name="_subscribed[]"]:first', row).prop('checked', state);
+  };
+
   this.folder_size = function(folder)
   {
     var lock = this.set_busy(true, 'loading');

program/steps/settings/folders.inc

@@ -50,8 +50,10 @@ if ($RCMAIL->action == 'subscribe') {
 
             $OUTPUT->show_message('foldersubscribed', 'confirmation');
         }
-        else
+        else {
             $RCMAIL->display_server_error('errorsaving');
+            $OUTPUT->command('reset_subscription', $mbox, false);
+        }
     }
 }
 // unsubscribe mailbox
@@ -60,10 +62,14 @@ else if ($RCMAIL->action == 'unsubscribe') {
 
     if (strlen($mbox)) {
         $result = $STORAGE->unsubscribe(array($mbox));
-        if ($result)
+
+        if ($result) {
             $OUTPUT->show_message('folderunsubscribed', 'confirmation');
-        else
+        }
+        else {
             $RCMAIL->display_server_error('errorsaving');
+            $OUTPUT->command('reset_subscription', $mbox, true);
+        }
     }
 }
 // delete an existing mailbox