iCalcreator.class.php

<?php
/*********************************************************************************/
/**
 * iCalcreator class v2.6
 * copyright (c) 2007-2008 Kjell-Inge Gustafsson kigkonsult
 * www.kigkonsult.se/iCalcreator/index.php
 * ical@kigkonsult.se
 *
 * Description:
 * This file is a PHP implementation of RFC 2445.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
/*********************************************************************************/
/*********************************************************************************/
/*         A little setup                                                        */
/*********************************************************************************/
/* your local language code */
// define( 'ICAL_LANG', 'sv' );
// alt. autosetting
/*
$langstr     = $_SERVER['HTTP_ACCEPT_LANGUAGE'];
$pos         = strpos( $langstr, ';' );
if ($pos   !== false) {
  $langstr   = substr( $langstr, 0, $pos );
  $pos       = strpos( $langstr, ',' );
  if ($pos !== false) {
    $pos     = strpos( $langstr, ',' );
    $langstr = substr( $langstr, 0, $pos );
  }
  define( 'ICAL_LANG', $langstr );
}
*/
/* only for phpversion 5.x, date management, default timezone setting */
if (substr(phpversion(), 0, 1) >= '5') // && ( 'UTC' == date_default_timezone_get() )) {
    date_default_timezone_set('Europe/Stockholm');
/* version string, do NOT remove!! */
define('ICALCREATOR_VERSION', 'iCalcreator 2.6');
/*********************************************************************************/
/*********************************************************************************/

/**
 * vcalendar class
 *
 * @author Kjell-Inge Gustafsson <ical@kigkonsult.se>
 * @since 2.2.13 - 2007-12-30
 */
class vcalendar
{
    //  calendar property variables
    var $calscale;
    var $method;
    var $prodid;
    var $version;
    var $xprop;
    //  container for calendar components
    var $components;
    //  component config variables
    var $allowEmpty;
    var $unique_id;
    var $language;
    var $directory;
    var $filename;
    var $url;
    var $delimiter;
    var $nl;
    var $format;
    //  component internal variables
    var $attributeDelimiter;
    var $valueInit;
    //  component xCal declaration container
    var $xcaldecl;

    /*
 * constructor for calendar object
 *
 * @author Kjell-Inge Gustafsson <ical@kigkonsult.se>
 * @since 2.2.13 - 2007-12-30
 * @return void
 */
    function vcalendar()
    {
        $this->_makeVersion();
        $this->calscale = null;
        $this->method = null;
        $this->_makeUnique_id();
        $this->prodid = null;
        $this->xprop = array();
        /**
         *   language = <Text identifying a language, as defined in [RFC 1766]>
         */
        if (defined('ICAL_LANG'))
            $this->setConfig('language', ICAL_LANG);
        $this->setConfig('allowEmpty', TRUE);
        $this->setConfig('nl', "\n");
        $this->setConfig('format', 'iCal');
        $this->directory = null;
        $this->filename = null;
        $this->url = null;
        $this->setConfig('delimiter', DIRECTORY_SEPARATOR);
        $this->xcaldecl = array();
        $this->components = array();
    }
    /*********************************************************************************/
    /**
     * Property Name: CALSCALE
     */
    /**
     * creates formatted output for calendar property calscale
     *
     * @author Kjell-Inge Gustafsson <ical@kigkonsult.se>
     * @since 2.4.8 - 2008-10-21
     * @return string
     */
    function createCalscale()
    {
        if (empty($this->calscale)) return FALSE;
        switch ($this->format) {
            case 'xcal':
                return ' calscale="' . $this->calscale . '"' . $this->nl;
                break;
            default:
                return 'CALSCALE:' . $this->calscale . $this->nl;
                break;
        }
    }

    /**
     * set calendar property calscale
     *
     * @author Kjell-Inge Gustafsson <ical@kigkonsult.se>
     * @since 2.4.8 - 2008-10-21
     * @param string $value
     * @return void
     */
    function setCalscale($value)
    {
        if (empty($value)) return FALSE;
        $this->calscale = $value;
    }
    /*********************************************************************************/
    /**
     * Property Name: METHOD
     */
    /**
     * creates formatted output for calendar property method
     *
     * @author Kjell-Inge Gustafsson <ical@kigkonsult.se>
     * @since 0.9.7 - 2006-11-20
     * @return string
     */
    function createMethod()
    {
        if (empty($this->method)) return FALSE;
        switch ($this->format) {
            case 'xcal':
                return ' method="' . $this->method . '"' . $this->nl;
                break;
            default:
                return 'METHOD:' . $this->method . $this->nl;
                break;
        }
    }

    /**
     * set calendar property method
     *
     * @author Kjell-Inge Gustafsson <ical@kigkonsult.se>
     * @since 2.4.8 - 2008-20-23
     * @param string $value
     * @return bool
     */
    function setMethod($value)
    {
        if (empty($value)) return FALSE;
        $this->method = $value;
        return TRUE;
    }
    /*********************************************************************************/
    /**
     * Property Name: PRODID
     *
     *  The identifier is RECOMMENDED to be the identical syntax to the
     * [RFC 822] addr-spec. A good method to assure uniqueness is to put the
     * domain name or a domain literal IP address of the host on which.. .
     */
    /**
     * creates formatted output for calendar property prodid