MOBILE-3657 ws: Add throw on failed status helper function

src/core/services/ws.ts

@@ -232,6 +232,22 @@ export class CoreWSProvider {
         return new CoreError(message);
     }
 
+    /**
+     * It will check if response has failed and throw the propper error.
+     *
+     * @param response WS response.
+     * @param defaultMessage Message to be used in case warnings is empty.
+     */
+    throwOnFailedStatus(response: CoreStatusWithWarningsWSResponse, defaultMessage: string): void {
+        if (!response.status) {
+            if (response.warnings && response.warnings.length) {
+                throw new CoreWSError(response.warnings[0]);
+            }
+
+            throw new CoreError(defaultMessage);
+        }
+    }
+
     /**
      * Downloads a file from Moodle using Cordova File API.
      *