Fix error handling when listing details are unavailable

Author: CodyReichert

src/simply-rets-api-helper.php

@@ -581,9 +581,13 @@ public static function srResidentialDetailsGenerator( $listing ) {
          * The error code comes from the UrlBuilder function.
         */
         if($listing == NULL
+           || property_exists($listing, "message")
            || property_exists($listing, "error")
            || property_exists($listing, "errors")) {
-            $err = SrMessages::noResultsMsg((array)$listing);
+            $err = SrMessages::noResultsMsg(
+                (array)$listing,
+                "Details for this listing are no longer available."
+            );
             return $err;
         }
 

src/simply-rets-utils.php

@@ -530,14 +530,13 @@ public static function getBathroomsDisplay(
 
 class SrMessages {
 
-    public static function noResultsMsg($response) {
+    public static function noResultsMsg($response, $msg) {
 
         $response = (array)$response;
+        $message = $msg ? $msg : $response['message'];
         if(array_key_exists("message", $response)) {
             return (
-                '<br><p><strong>'
-                . $response['message']
-                . '</br></p></strong>'
+                '<br><p><strong>' . $message . '</br></p></strong>'
             );
         }