refactor: rewrite modules/api.js in AMD style

public/src/modules/api.js

@@ -1,3 +1,7 @@
+'use strict';
+
+define('api', () => {
+	const api = {};
 	const baseUrl = config.relative_path + '/api/v1';
 
 	function call(options, onSuccess, onError) {
@@ -14,32 +18,27 @@ function call(options, onSuccess, onError) {
 			});
 	}
 
-export function get(route, payload, onSuccess, onError) {
-	return call({
+	api.get = (route, payload, onSuccess, onError) => call({
 		url: baseUrl + route + '?' + $.param(payload),
 	}, onSuccess, onError);
-}
 
-export function post(route, payload, onSuccess, onError) {
-	return call({
+	api.post = (route, payload, onSuccess, onError) => call({
 		url: baseUrl + route,
 		method: 'post',
 		data: payload,
 	}, onSuccess, onError);
-}
 
-export function put(route, payload, onSuccess, onError) {
-	return call({
+	api.put = (route, payload, onSuccess, onError) => call({
 		url: baseUrl + route,
 		method: 'put',
 		data: payload,
 	}, onSuccess, onError);
-}
 
-export function del(route, payload, onSuccess, onError) {
-	return call({
+	api.del = (route, payload, onSuccess, onError) => call({
 		url: baseUrl + route,
 		method: 'delete',
 		data: payload,
 	}, onSuccess, onError);
-}
+
+	return api;
+});