Alter urls placed in footer or header

README.md

@@ -25,7 +25,15 @@ It's possible to use variables in [Smarty](http://www.smarty.net) format.
 
 ## UTM in footer
 
-This feature works based on not published hook `hook_civicrm_alterUrl`, yet.
+This feature works based on `hook_civicrm_alterMailContent`. There is needed a small patch to civicrm-core in order to have mailing_id and campaign_id visible by utmaltor.
+
+```php
+// todo add these lines in body of CRM_Mailing_BAO_Mailing::getTemplates() function
++ $this->templates['mailing_id'] = $this->id;
++ $this->templates['campaign_id'] = $this->campaign_id;
+
+CRM_Utils_Hook::alterMailContent($this->templates);
+```
 
 Required configuration for CKEditor:
 

utmaltor.php

@@ -113,12 +113,22 @@ function utmaltor_civicrm_alterSettingsFolders(&$metaDataFolders = NULL) {
   _utmaltor_civix_civicrm_alterSettingsFolders($metaDataFolders);
 }
 
+/**
+ * Implements hook_civicrm_alterMailContent().
+ */
+function utmaltor_civicrm_alterMailContent(&$content) {
+  // fixme mailing_id and campaign_id is added via patch to civicrm-core
+  $utmParams = ['mailing_id' => $content['mailing_id'], 'campaign_id' => $content['campaign_id'], 'subject' => $content['subject']];
+  $content['html'] = _utmaltor_findUrls($content['html'], $utmParams);
+  $content['text'] = _utmaltor_findUrls($content['text'], $utmParams);
+}
+
 /**
  * Implements hook_civicrm_container().
  *
  * @link http://wiki.civicrm.org/confluence/display/CRMDOC/hook_civicrm_container
  */
-function utmaltor_civicrm_container($container) {
+function utmaltor_civicrm_container(\Symfony\Component\DependencyInjection\ContainerBuilder $container) {
   // Add a Symfony listener on civi.flexmailer.run. See Flexmailer dev docs for details.
   $container->addResource(new \Symfony\Component\Config\Resource\FileResource(__FILE__));
   $container->findDefinition('dispatcher')->addMethodCall('addListener',