cookie.js

/*
 * JavaScript tracker for Snowplow: cookie.js
 * 
 * Significant portions copyright 2010 Anthon Pang. Remainder copyright 
 * 2012-2014 Snowplow Analytics Ltd. All rights reserved. 
 * 
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions are 
 * met: 
 *
 * * Redistributions of source code must retain the above copyright 
 *   notice, this list of conditions and the following disclaimer. 
 *
 * * Redistributions in binary form must reproduce the above copyright 
 *   notice, this list of conditions and the following disclaimer in the 
 *   documentation and/or other materials provided with the distribution. 
 *
 * * Neither the name of Anthon Pang nor Snowplow Analytics Ltd nor the
 *   names of their contributors may be used to endorse or promote products
 *   derived from this software without specific prior written permission. 
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * Get cookie value
 */
SnowPlow.getCookie = function (cookieName) {
	var cookiePattern = new RegExp('(^|;)[ ]*' + cookieName + '=([^;]*)'),
			cookieMatch = cookiePattern.exec(SnowPlow.documentAlias.cookie);

	return cookieMatch ? SnowPlow.decodeWrapper(cookieMatch[2]) : 0;
}

/*
 * Set cookie value
 */
SnowPlow.setCookie = function (cookieName, value, msToExpire, path, domain, secure) {
	var expiryDate;

	// relative time to expire in milliseconds
	if (msToExpire) {
		expiryDate = new Date();
		expiryDate.setTime(expiryDate.getTime() + msToExpire);
	}

	SnowPlow.documentAlias.cookie = cookieName + '=' + SnowPlow.encodeWrapper(value) +
		(msToExpire ? ';expires=' + expiryDate.toGMTString() : '') +
		';path=' + (path || '/') +
		(domain ? ';domain=' + domain : '') +
		(secure ? ';secure' : '');
}