/* global userSettings */
/* exported getUserSetting, setUserSetting, deleteUserSetting */
// utility functions

var wpCookies = {
// The following functions are from Cookie.js class in TinyMCE, Moxiecode, used under LGPL.

	each : function(obj, cb, scope) {
		var n, l;

		if ( !obj )
			return 0;

		scope = scope || obj;

		if ( typeof(obj.length) != 'undefined' ) {
			for ( n = 0, l = obj.length; n < l; n++ ) {
				if ( cb.call(scope, obj[n], n, obj) === false )
					return 0;
			}
		} else {
			for ( n in obj ) {
				if ( obj.hasOwnProperty(n) ) {
					if ( cb.call(scope, obj[n], n, obj) === false ) {
						return 0;
					}
				}
			}
		}
		return 1;
	},

	/**
	 * Get a multi-values cookie.
	 * Returns a JS object with the name: 'value' pairs.
	 */
	getHash : function(name) {
		var all = this.get(name), ret;

		if ( all ) {
			this.each( all.split('&'), function(pair) {
				pair = pair.split('=');
				ret = ret || {};
				ret[pair[0]] = pair[1];
			});
		}
		return ret;
	},

	/**
	 * Set a multi-values cookie.
	 *
	 * 'values_obj' is the JS object that is stored. It is encoded as URI in wpCookies.set().
	 */
	setHash : function(name, values_obj, expires, path, domain, secure) {
		var str = '';

		this.each(values_obj, function(val, key) {
			str += (!str ? '' : '&') + key + '=' + val;
		});

		this.set(name, str, expires, path, domain, secure);
	},

	/**
	 * Get a cookie.
	 */
	get : function(name) {
		var e, b,
			cookie = document.cookie,
			p = name + '=';

		if ( !cookie )
			return;

		b = cookie.indexOf('; ' + p);

		if ( b == -1 ) {
			b = cookie.indexOf(p);

			if ( b !== 0 )
				return null;

		} else {
			b += 2;
		}

		e = cookie.indexOf( ';', b );

		if ( e == -1 )
			e = cookie.length;

		return decodeURIComponent( cookie.substring(b + p.length, e) );
	},

	/**
	 * Set a cookie.
	 *
	 * The 'expires' arg can be either a JS Date() object set to the expiration date (back-compat)
	 * or the number of seconds until expiration
	 */
	set : function(name, value, expires, path, domain, secure) {
		var d = new Date();

		if ( typeof(expires) == 'object' && expires.toGMTString ) {
			expires = expires.toGMTString();
		} else if ( parseInt(expires, 10) ) {
			d.setTime( d.getTime() + ( parseInt(expires, 10) * 1000 ) ); // time must be in miliseconds
			expires = d.toGMTString();
		} else {
			expires = '';
		}

		document.cookie = name + '=' + encodeURIComponent( value ) +
			( expires ? '; expires=' + expires : '' ) +
			( path    ? '; path=' + path       : '' ) +
			( domain  ? '; domain=' + domain   : '' ) +
			( secure  ? '; secure'             : '' );
	},

	/**
	 * Remove a cookie.
	 *
	 * This is done by setting it to an empty value and setting the expiration time in the past.
	 */
	remove : function(name, path) {
		this.set(name, '', -1000, path);
	}
};

// Returns the value as string. Second arg or empty string is returned when value is not set.
function getUserSetting( name, def ) {
	var obj = getAllUserSettings();

	if ( obj.hasOwnProperty(name) )
		return obj[name];

	if ( typeof def != 'undefined' )
		return def;

	return '';
}

// Both name and value must be only ASCII letters, numbers or underscore
// and the shorter, the better (cookies can store maximum 4KB). Not suitable to store text.
function setUserSetting( name, value, _del ) {
	if ( 'object' !== typeof userSettings )
		return false;

	var cookie = 'wp-settings-' + userSettings.uid, all = wpCookies.getHash(cookie) || {}, path = userSettings.url,
	n = name.toString().replace(/[^A-Za-z0-9_]/, ''), v = value.toString().replace(/[^A-Za-z0-9_]/, '');

	if ( _del ) {
		delete all[n];
	} else {
		all[n] = v;
	}

	wpCookies.setHash(cookie, all, 31536000, path);
	wpCookies.set('wp-settings-time-'+userSettings.uid, userSettings.time, 31536000, path);

	return name;
}

function deleteUserSetting( name ) {
	return setUserSetting( name, '', 1 );
}

// Returns all settings as js object.
function getAllUserSettings() {
	if ( 'object' !== typeof userSettings )
		return {};

	return wpCookies.getHash('wp-settings-' + userSettings.uid) || {};
}