/* 
 * cookies.js : 
 * functions for manipulating (creating, retrieving, removing) cookies 
 * Borrowed from http://techpatterns.com/downloads/javascript_cookies.php
 *
 * Created 20100512 by GO
 * Updated 20100513 by GO
 *
 * Notes:
 * - I need to set the domain to "torontopubliclibrary.ca" so it's usable
 *   on all TPL servers
 *   - this won't work on local servers, which hoses testing with default settings ...
 * */

function setCookie( name, value, expires, path, domain, secure ) {
	/* For "normal" use, "domain" would remain unset and the cookie would be 
	 * valid only for the subdomain (ex. "www.torontopubliclibrary.ca") but
	 * by setting the domain to "torontopubliclibrary.ca" it should be valid
	 * for any TPL subdomain.
	 */

	// set time, it's in milliseconds
	var today = new Date();
	today.setTime( today.getTime() );

	/*
	if the expires variable is set, make the correct
	expires time, the current script below will set
	it for x number of days, to make it for hours,
	delete * 24, for minutes, delete * 60 * 24
	*/
	if ( expires )
	{
		expires = expires * 1000 * 60 * 60 * 24;
	}
	var expires_date = new Date( today.getTime() + (expires) );

	document.cookie = name + "=" +escape( value ) +
	( ( expires ) ? ";expires=" + expires_date.toGMTString() : "" ) +
	( ( path ) ? ";path=" + path : "" ) +
	( ( domain ) ? ";domain=" + domain : "" ) +
	( ( secure ) ? ";secure" : "" );
}

function getCookie( check_name ) {
	// first we'll split this cookie up into name/value pairs
	// note: document.cookie only returns name=value, not the other components
	var a_all_cookies = document.cookie.split( ';' );
	var a_temp_cookie = '';
	var cookie_name = '';
	var cookie_value = '';
	var b_cookie_found = false; // set boolean t/f default f

	for ( i = 0; i < a_all_cookies.length; i++ )
	{
		// now we'll split apart each name=value pair
		a_temp_cookie = a_all_cookies[i].split( '=' );


		// and trim left/right whitespace while we're at it
		cookie_name = a_temp_cookie[0].replace(/^\s+|\s+$/g, '');

		// if the extracted name matches passed check_name
		if ( cookie_name == check_name )
		{
			b_cookie_found = true;
			// we need to handle case where cookie has no value but exists (no = sign, that is):
			if ( a_temp_cookie.length > 1 )
			{
				cookie_value = unescape( a_temp_cookie[1].replace(/^\s+|\s+$/g, '') );
			}
			// note that in cases where cookie is initialized but no value, null is returned
			return cookie_value;
			break;
		}
		a_temp_cookie = null;
		cookie_name = '';
	}
	if ( !b_cookie_found )
	{
		return null;
	}
}

function deleteCookie( name, path, domain ) {
	if ( getCookie( name ) ) document.cookie = name + "=" +
	( ( path ) ? ";path=" + path : "") +
	( ( domain ) ? ";domain=" + domain : "" ) +
	";expires=Thu, 01-Jan-1970 00:00:01 GMT";
}

// This isn't about cookie manipulation and should perhaps be in a
// different file ...
function updateDefaultUrl() {
	var currentChoice=getCookie('prefSite'); // Get the URL from the cookie
	var currentChoiceHtml=document.getElementById('currentChoice');
	if (currentChoice) {
		//var reg_old = new RegExp("http://www");
		var reg_new = new RegExp("http://beta");
		if (reg_new.test(currentChoice)) { // Check for a valid URL
			currentChoiceHtml.innerHTML="the new version";
		} else {
			currentChoiceHtml.innerHTML="the old version";
		}
	}
}