From 29cff47ec9c633ed3a8e1ba7754763a856fbebff Mon Sep 17 00:00:00 2001
From: "Matthew Wire (MJW Consulting)" <mjw@mjwconsult.co.uk>
Date: Mon, 22 Apr 2019 15:08:50 +0100
Subject: [PATCH] Add function filterLinks to return an array of links for an
 entity that can be used by the API / form layer to generate a link

---
 CRM/Core/Action.php | 59 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 59 insertions(+)

diff --git a/CRM/Core/Action.php b/CRM/Core/Action.php
index 638976ea32..f93583590f 100644
--- a/CRM/Core/Action.php
+++ b/CRM/Core/Action.php
@@ -298,6 +298,65 @@ class CRM_Core_Action {
     return $result;
   }
 
+  /**
+   * Given a set of links and a mask, return a filtered (by mask) array containing the final links with parsed values
+   *   and calling hooks as appropriate.
+   * Use this when passing a set of action links to the API or to the form without adding html formatting.
+   *
+   * @param array $links
+   *   The set of link items.
+   * @param int $mask
+   *   The mask to be used. a null mask means all items.
+   * @param array $values
+   *   The array of values for parameter substitution in the link items.
+   * @param null $op
+   * @param null $objectName
+   * @param int $objectId
+   *
+   * @return array|null
+   *   The array describing each link
+   */
+  public static function filterLinks(
+    $links,
+    $mask,
+    $values,
+    $op = NULL,
+    $objectName = NULL,
+    $objectId = NULL
+  ) {
+    if (empty($links)) {
+      return NULL;
+    }
+
+    // make links indexed sequentially instead of by bitmask
+    // otherwise it's next to impossible to reliably add new ones
+    $seqLinks = array();
+    foreach ($links as $bit => $link) {
+      $link['bit'] = $bit;
+      $seqLinks[] = $link;
+    }
+
+    if ($op && $objectName && $objectId) {
+      CRM_Utils_Hook::links($op, $objectName, $objectId, $seqLinks, $mask, $values);
+    }
+
+    foreach ($seqLinks as $i => $link) {
+      if (!$mask || !array_key_exists('bit', $link) || ($mask & $link['bit'])) {
+        $seqLinks[$i]['extra'] = isset($link['extra']) ? self::replace($link['extra'], $values) : NULL;
+
+        if (isset($link['qs']) && !CRM_Utils_System::isNull($link['qs'])) {
+          $seqLinks[$i]['url'] = self::replace($link['url'], $values);
+          $seqLinks[$i]['qs'] = self::replace($link['qs'], $values);
+        }
+      }
+      else {
+        unset($seqLinks[$i]);
+      }
+    }
+
+    return $seqLinks;
+  }
+
   /**
    * Given a string and an array of values, substitute the real values
    * in the placeholder in the str in the CiviCRM format
-- 
2.25.1