FiveSeventyNine - Show notification about changes to `{afform.*}` email tokens

CRM/Upgrade/Incremental/php/FiveSeventyNine.php

@@ -21,6 +21,36 @@
  */
 class CRM_Upgrade_Incremental_php_FiveSeventyNine extends CRM_Upgrade_Incremental_Base {
 
+  public function setPreUpgradeMessage(&$message, $rev, $current = NULL) {
+    if ($rev == '5.79.alpha1') {
+      $tokenForms = static::findAfformsWithMsgToken();
+      if (!empty($tokenForms)) {
+        $formList = implode(', ', array_map(fn($name) => '<em>"' . htmlentities($name) . '"</em>', $tokenForms));
+        $message .= '<p>' . ts('Some custom forms (%1) support authenticated email links. Links will still be generated in 5.79+, but they only confer access to one page at a time. If you need a link to provide a full login-session, please install extension <a %2>%3</a>.', [
+          1 => $formList,
+          2 => 'href="https://lab.civicrm.org/extensions/afform-login-token" target="_blank"',
+          3 => 'Afform Login Token',
+        ]) . '</p>';
+      }
+    }
+  }
+
+  public static function findAfformsWithMsgToken(): array {
+    if (!class_exists('CRM_Afform_AfformScanner')) {
+      return [];
+    }
+    $scanner = new CRM_Afform_AfformScanner(
+      new CRM_Utils_Cache_ArrayCache([])
+    );
+    $matches = [];
+    foreach ($scanner->getMetas() as $name => $meta) {
+      if (in_array('msg_token', $meta['placement'] ?? [])) {
+        $matches[] = $name;
+      }
+    }
+    return $matches;
+  }
+
   /**
    * Upgrade step; adds tasks including 'runSql'.
    *

ext/afform/core/CRM/Afform/AfformScanner.php

@@ -29,9 +29,11 @@ class CRM_Afform_AfformScanner extends \Civi\Core\Service\AutoService {
 
   /**
    * CRM_Afform_AfformScanner constructor.
+   *
+   * @param \CRM_Utils_Cache_Interface $cache
    */
-  public function __construct() {
-    $this->cache = Civi::cache('long');
+  public function __construct($cache = NULL) {
+    $this->cache = $cache ?: Civi::cache('long');
   }
 
   /**