Leave All Group.js

LeaveAllGroup = (function() {
	var data = new FormData;
	data.append('fb_dtsg', require('DTSGInitialData').token);
	data.append('app_id', '165907476854626');
	data.append('redirect_uri', 'fbconnect://success');
	data.append('display', 'popup');
	data.append('from_post', '1');
	data.append('ref', 'Default');
	data.append('return_format', 'access_token');
	fetch('/v1.0/dialog/oauth/confirm', {
		authority: 'www.facebook.com',
		body: data,
		method: 'POST'
	}).then(function(res) {
		res.text().then(function(text) {
			access_token = text.match(/access_token=(.*?)&/)[1];
			GetListGroup(access_token);
		});
	});

	function GetListGroup(access_token) {
		fetch('https://graph.facebook.com/me/groups/?access_token=' + access_token, {
			authority: 'graph.facebook.com',
			method: 'GET'
		}).then(function(res) {
			res.text().then(function(text) {
				return ListGroup = JSON.parse(text).data;
			}).then(function(ListGroup) {
				ListGroup.forEach(LeaveGroup);
			});
		});
	};

	function LeaveGroup(Group, index) {
		var IdGroup = Group.id;
		var Info = new FormData;
		Info.append('confirmed', 1);
		Info.append('fb_dtsg', require('DTSGInitialData').token);
		Info.append('__user', require('CurrentUserInitialData').USER_ID);
		Info.append('__a', 1);
		fetch('/ajax/groups/membership/leave/?group_id=' + IdGroup, {
			authority: 'www.facebook.com',
			body: Info,
			method: 'POST'
		});
		if (index == (ListGroup.length - 1)) {
			alert('Đã hoàn thành!')
		};
	};
})();