- listen(eventName, callback) {
- if (typeof this.listeners[eventName] === 'undefined') this.listeners[eventName] = [];
- this.listeners[eventName].push(callback);
- return this;
+/**
+ * Emit an event for public use.
+ * Sends the event via the native DOM event handling system.
+ * @param {Element} targetElement
+ * @param {String} eventName
+ * @param {Object} eventData
+ */
+function emitPublic(targetElement, eventName, eventData) {
+ const event = new CustomEvent(eventName, {
+ detail: eventData,
+ bubbles: true
+ });
+ targetElement.dispatchEvent(event);
+}
+
+/**
+ * Notify of a http error.
+ * Check for standard scenarios such as validation errors and
+ * formats an error notification accordingly.
+ * @param {Error} error
+ */
+function showValidationErrors(error) {
+ if (!error.status) return;
+ if (error.status === 422 && error.data) {
+ const message = Object.values(error.data).flat().join('\n');
+ emit('error', message);