Fix api preferred_communication_method CRM-12548

----------------------------------------
* CRM-12548: API not saving preferred_communication_method
  http://issues.civicrm.org/jira/browse/CRM-12548

CRM/Utils/Array.php

@@ -570,29 +570,37 @@ class CRM_Utils_Array {
   /**
    * Like explode() but assumes that the $value is padded with $delim on left and right
    *
-   * @param string|NULL $value
+   * @param mixed $values
    * @param string $delim
    * @return array|NULL
    */
-  static function explodePadded($value, $delim = CRM_Core_DAO::VALUE_SEPARATOR) {
-    if ($value === NULL) {
+  static function explodePadded($values, $delim = CRM_Core_DAO::VALUE_SEPARATOR) {
+    if ($values === NULL) {
       return NULL;
     }
-    return explode($delim, trim($value, $delim));
+    // If we already have an array, no need to continue
+    if (is_array($values)) {
+      return $values;
+    }
+    return explode($delim, trim((string) $values, $delim));
   }
 
   /**
-   * Like implode() but assumes that the $value is padded with $delim on left and right
+   * Like implode() but creates a string that is padded with $delim on left and right
    *
-   * @param string|NULL $value
+   * @param mixed $values
    * @param string $delim
-   * @return array|NULL
+   * @return string|NULL
    */
   static function implodePadded($values, $delim = CRM_Core_DAO::VALUE_SEPARATOR) {
     if ($values === NULL) {
       return NULL;
     }
-    return $delim . implode($delim, $values) . $delim;
+    // If we already have a string, strip $delim off the ends so it doesn't get added twice
+    if (is_string($values)) {
+      $values = trim($values, $delim);
+    }
+    return $delim . implode($delim, (array) $values) . $delim;
   }
 
   /**

api/v3/Contact.php

@@ -297,6 +297,11 @@ function _civicrm_api3_contact_check_params( &$params, $dupeCheck = true, $dupeE
     break;
   }
 
+  // Fixme: This really needs to be handled at a lower level. @See CRM-13123
+  if (isset($params['preferred_communication_method'])) {
+    $params['preferred_communication_method'] = CRM_Utils_Array::implodePadded($params['preferred_communication_method']);
+  }
+
   if (CRM_Utils_Array::value('contact_sub_type', $params) && CRM_Utils_Array::value('contact_type', $params)) {
       if (!(CRM_Contact_BAO_ContactType::isExtendsContactType($params['contact_sub_type'], $params['contact_type']))) {
         throw new API_Exception("Invalid or Mismatched Contact SubType: " . implode(', ', (array)$params['contact_sub_type']));