foursquare.js

(function(hello) {

	hello.init({

		foursquare: {

			name: 'Foursquare',

			oauth: {
				// See: https://developer.foursquare.com/overview/auth
				version: 2,
				auth: 'https://foursquare.com/oauth2/authenticate',
				grant: 'https://foursquare.com/oauth2/access_token'
			},

			// Refresh the access_token once expired
			refresh: true,

			base: 'https://api.foursquare.com/v2/',

			get: {
				me: 'users/self',
				'me/friends': 'users/self/friends',
				'me/followers': 'users/self/friends',
				'me/following': 'users/self/friends'
			},

			wrap: {
				me: function(o) {
					formatError(o);
					if (o && o.response) {
						o = o.response.user;
						formatUser(o);
					}

					return o;
				},

				'default': function(o) {
					formatError(o);

					// Format friends
					if (o && 'response' in o && 'friends' in o.response && 'items' in o.response.friends) {
						o.data = o.response.friends.items;
						o.data.forEach(formatUser);
						delete o.response;
					}

					return o;
				}
			},

			xhr: formatRequest,
			jsonp: formatRequest
		}
	});

	function formatError(o) {
		if (o.meta && (o.meta.code === 400 || o.meta.code === 401)) {
			o.error = {
				code: 'access_denied',
				message: o.meta.errorDetail
			};
		}
	}

	function formatUser(o) {
		if (o && o.id) {
			o.thumbnail = o.photo.prefix + '100x100' + o.photo.suffix;
			o.name = o.firstName + ' ' + o.lastName;
			o.first_name = o.firstName;
			o.last_name = o.lastName;
			if (o.contact) {
				if (o.contact.email) {
					o.email = o.contact.email;
				}
			}
		}
	}

	function formatRequest(p, qs) {
		var token = qs.access_token;
		delete qs.access_token;
		qs.oauth_token = token;
		qs.v = 20121125;
		return true;
	}

})(hello);