<?php



/**

 *  File: calendar.php | (c) dynarch.com 2004

 *  Distributed as part of "The Coolest DHTML Calendar"

 *  under the same terms.

 *  -----------------------------------------------------------------

 *  This file implements a simple PHP wrapper for the calendar.  It

 *  allows you to easily include all the calendar files and setup the

 *  calendar by instantiating and calling a PHP object.

 */



define('NEWLINE', "\n");



class DHTML_Calendar {

    var $calendar_lib_path;



    var $calendar_file;

    var $calendar_lang_file;

    var $calendar_setup_file;

    var $calendar_theme_file;

    var $calendar_options;



    function DHTML_Calendar($calendar_lib_path = '/calendar/',

                            $lang              = 'en',

                            $theme             = 'calendar-win2k-1',

                            $stripped          = true) {

        if ($stripped) {

            $this->calendar_file = 'calendar_stripped.js';

            $this->calendar_setup_file = 'calendar-setup_stripped.js';

        } else {

            $this->calendar_file = 'calendar.js';

            $this->calendar_setup_file = 'calendar-setup.js';

        }

        $this->calendar_lang_file = 'lang/calendar-' . $lang . '.js';

        $this->calendar_theme_file = $theme.'.css';

        $this->calendar_lib_path = preg_replace('/\/+$/', '/', $calendar_lib_path);

        $this->calendar_options = array('ifFormat' => '%Y/%m/%d',

                                        'daFormat' => '%Y/%m/%d');

    }



    function set_option($name, $value) {

        $this->calendar_options[$name] = $value;

    }



    function load_files() {

        echo $this->get_load_files_code();

    }



    function get_load_files_code() {

        $code  = ( '<link rel="stylesheet" type="text/css" media="all" href="' .

                   $this->calendar_lib_path . $this->calendar_theme_file .

                   '" />' . NEWLINE );

        $code .= ( '<script type="text/javascript" src="' .

                   $this->calendar_lib_path . $this->calendar_file .

                   '"></script>' . NEWLINE );

        $code .= ( '<script type="text/javascript" src="' .

                   $this->calendar_lib_path . $this->calendar_lang_file .

                   '"></script>' . NEWLINE );

        $code .= ( '<script type="text/javascript" src="' .

                   $this->calendar_lib_path . $this->calendar_setup_file .

                   '"></script>' );

        return $code;

    }



    function _make_calendar($other_options = array()) {

        $js_options = $this->_make_js_hash(array_merge($this->calendar_options, $other_options));

        $code  = ( '<script type="text/javascript">Calendar.setup({' .

                   $js_options .

                   '});</script>' );

        return $code;

    }



    function make_input_field($cal_options = array(), $field_attributes = array()) {

        $id = $this->_gen_id();

        $attrstr = $this->_make_html_attr(array_merge($field_attributes,

                                                      array('id'   => $this->_field_id($id),

                                                            'type' => 'text')));

        echo '<input ' . $attrstr .'/>';

        echo '<a href="#" id="'. $this->_trigger_id($id) . '">' .

            '<img align="middle" border="0" src="' . $this->calendar_lib_path . 'img.gif" alt="" /></a>';



        $options = array_merge($cal_options,

                               array('inputField' => $this->_field_id($id),

                                     'button'     => $this->_trigger_id($id)));

        echo $this->_make_calendar($options);

    }



    /// PRIVATE SECTION



    function _field_id($id) { return 'f-calendar-field-' . $id; }

    function _trigger_id($id) { return 'f-calendar-trigger-' . $id; }

    function _gen_id() { static $id = 0; return ++$id; }



    function _make_js_hash($array) {

        $jstr = '';

        reset($array);

        while (list($key, $val) = each($array)) {

            if (is_bool($val))

                $val = $val ? 'true' : 'false';

            else if (!is_numeric($val))

                $val = '"'.$val.'"';

            if ($jstr) $jstr .= ',';

            $jstr .= '"' . $key . '":' . $val;

        }

        return $jstr;

    }



    function _make_html_attr($array) {

        $attrstr = '';

        reset($array);

        while (list($key, $val) = each($array)) {

            $attrstr .= $key . '="' . $val . '" ';

        }

        return $attrstr;

    }

};



?>