<?php
global $CFG;
require_once "$CFG->libdir/form/group.php";
require_once "$CFG->libdir/formslib.php";

/**
 * Class for a group of elements used to input a date and time.
 *
 * Emulates moodle print_date_selector function and also allows you to select a time.
 *
 * @author Jamie Pratt <me@jamiep.org>
 * @access public
 */
class MoodleQuickForm_date_time_selector extends MoodleQuickForm_group{
    /**
    * Options for the element
    *
    * startyear => integer start of range of years that can be selected
    * stopyear => integer last year that can be selected
    * timezone => float/string timezone
    * applydst => apply users daylight savings adjustment?
    * step     => step to increment minutes by
    */
    var $_options = array('startyear'=>1970, 'stopyear'=>2020,
                    'timezone'=>99, 'applydst'=>true, 'step'=>5, 'optional'=>false);

   /**
    * These complement separators, they are appended to the resultant HTML
    * @access   private
    * @var      array
    */
    var $_wrap = array('', '');

   /**
    * Class constructor
    *
    * @access   public
    * @param    string  Element's name
    * @param    mixed   Label(s) for an element
    * @param    array   Options to control the element's display
    * @param    mixed   Either a typical HTML attribute string or an associative array
    */
    function MoodleQuickForm_date_time_selector($elementName = null, $elementLabel = null, $options = array(), $attributes = null)
    {
        $this->HTML_QuickForm_element($elementName, $elementLabel, $attributes);
        $this->_persistantFreeze = true;
        $this->_appendName = true;
        $this->_type = 'date_time_selector';
        // set the options, do not bother setting bogus ones
        if (is_array($options)) {
            foreach ($options as $name => $value) {
                if (isset($this->_options[$name])) {
                    if (is_array($value) && is_array($this->_options[$name])) {
                        $this->_options[$name] = @array_merge($this->_options[$name], $value);
                    } else {
                        $this->_options[$name] = $value;
                    }
                }
            }
        }
    }

    // }}}
    // {{{ _createElements()

    function _createElements()
    {
        $this->_elements = array();
        for ($i=1; $i<=31; $i++) {
            $days[$i] = $i;
        }
        for ($i=1; $i<=12; $i++) {
            $months[$i] = userdate(gmmktime(12,0,0,$i,15,2000), "%B");
        }
        for ($i=$this->_options['startyear']; $i<=$this->_options['stopyear']; $i++) {
            $years[$i] = $i;
        }
        for ($i=0; $i<=23; $i++) {
            $hours[$i] = sprintf("%02d",$i);
        }
        for ($i=0; $i<60; $i+=$this->_options['step']) {
            $minutes[$i] = sprintf("%02d",$i);
        }
// (Shirai128): QuickFormを用いている箇所での年月日の並び順を選択した言語によって自動的に並べ直す改良（喜多先生版） (2009/04/08)
// (Shirai128): ここからコメントアウト
//      $this->_elements[] =& MoodleQuickForm::createElement('select', 'day', get_string('day', 'form'), $days, $this->getAttributes(), true);
//      $this->_elements[] =& MoodleQuickForm::createElement('select', 'month', get_string('month', 'form'), $months, $this->getAttributes(), true);
//      $this->_elements[] =& MoodleQuickForm::createElement('select', 'year', get_string('year', 'form'), $years, $this->getAttributes(), true);
// (Shirai128): ここから追加
        preg_match_all('/%[dBmY]/', get_string("strftimedate"), $dmatches ); //t-kita 20090407
        $dmatches0 = $dmatches[0];
        if (count($dmatches0)!=3){ $dmatches0 = array('%d','%B','%Y'); }
        foreach ($dmatches0 as $dpiece){
            if ($dpiece=='%d'){
                $this->_elements[] =& MoodleQuickForm::createElement('select', 'day', get_string('day', 'form'), $days, $this->getAttributes(), true);
            }elseif (($dpiece=='%B') || ($dpiece=='%m')){
                $this->_elements[] =& MoodleQuickForm::createElement('select', 'month', get_string('month', 'form'), $months, $this->getAttributes(), true);
            }elseif ($dpiece=='%Y'){
                $this->_elements[] =& MoodleQuickForm::createElement('select', 'year', get_string('year', 'form'), $years, $this->getAttributes(), true);
            }
        }
// (Shirai128): ここまで追加
		if (right_to_left()) {   // Switch order of elements for Right-to-Left
			$this->_elements[] =& MoodleQuickForm::createElement('select', 'minute', get_string('minute', 'form'), $minutes, $this->getAttributes(), true);
			$this->_elements[] =& MoodleQuickForm::createElement('select', 'hour', get_string('hour', 'form'), $hours, $this->getAttributes(), true);
		} else {
			$this->_elements[] =& MoodleQuickForm::createElement('select', 'hour', get_string('hour', 'form'), $hours, $this->getAttributes(), true);
			$this->_elements[] =& MoodleQuickForm::createElement('select', 'minute', get_string('minute', 'form'), $minutes, $this->getAttributes(), true);
		}
        // If optional we add a checkbox which the user can use to turn if on
        if($this->_options['optional']) {
            $this->_elements[] =& MoodleQuickForm::createElement('checkbox', 'off', null, get_string('disable'), $this->getAttributes(), true);
        }
        foreach ($this->_elements as $element){
            if (method_exists($element, 'setHiddenLabel')){
                $element->setHiddenLabel(true);
            }
        }

    }

    // }}}
    // {{{ onQuickFormEvent()

    /**
     * Called by HTML_QuickForm whenever form event is made on this element
     *
     * @param     string    $event  Name of event
     * @param     mixed     $arg    event arguments
     * @param     object    $caller calling object
     * @since     1.0
     * @access    public
     * @return    void
     */
    function onQuickFormEvent($event, $arg, &$caller)
    {
        switch ($event) {
            case 'updateValue':
                // constant values override both default and submitted ones
                // default values are overriden by submitted
                $value = $this->_findValue($caller->_constantValues);
                if (null === $value) {
                    // if no boxes were checked, then there is no value in the array
                    // yet we don't want to display default value in this case
                    if ($caller->isSubmitted()) {
                        $value = $this->_findValue($caller->_submitValues);
                    } else {
                        $value = $this->_findValue($caller->_defaultValues);
                    }
                }
                $requestvalue=$value;
                if ($value == 0) {
                    $value = time();
                }
                if (!is_array($value)) {
                    $currentdate = usergetdate($value);
                    // Round minutes to the previous multiple of step.
                    $currentdate['minutes'] -= $currentdate['minutes'] % $this->_options['step'];
                    $value = array(
                        'minute' => $currentdate['minutes'],
                        'hour' => $currentdate['hours'],
                        'day' => $currentdate['mday'],
                        'month' => $currentdate['mon'],
                        'year' => $currentdate['year']);
                    // If optional, default to off, unless a date was provided
                    if($this->_options['optional']) {
                        $value['off'] = ($requestvalue == 0) ? true : false;
                    }
                } else {
                    $value['off'] = (isset($value['off'])) ? true : false;
                }
                if (null !== $value){
                    $this->setValue($value);
                }
                break;
            case 'createElement':
                if($arg[2]['optional']) {
                    $caller->disabledIf($arg[0], $arg[0].'[off]', 'checked');
                }
                return parent::onQuickFormEvent($event, $arg, $caller);
                break;
            default:
                return parent::onQuickFormEvent($event, $arg, $caller);
        }
    }

    // }}}
    // {{{ toHtml()

    function toHtml()
    {
        include_once('HTML/QuickForm/Renderer/Default.php');
        $renderer =& new HTML_QuickForm_Renderer_Default();
        $renderer->setElementTemplate('{element}');
        parent::accept($renderer);
        return $this->_wrap[0] . $renderer->toHtml() . $this->_wrap[1];
    }

    // }}}
    // {{{ accept()

    function accept(&$renderer, $required = false, $error = null)
    {
        $renderer->renderElement($this, $required, $error);
    }

    // }}}

    /**
     * Output a timestamp. Give it the name of the group.
     *
     * @param array $submitValues
     * @param bool $assoc
     * @return array
     */
    function exportValue(&$submitValues, $assoc = false)
    {
        $value = null;
        $valuearray = array();
        foreach ($this->_elements as $element){
            $thisexport = $element->exportValue($submitValues[$this->getName()], true);
            if ($thisexport!=null){
                $valuearray += $thisexport;
            }
        }
        if (count($valuearray)){
            if($this->_options['optional']) {
                // If checkbox is on, the value is zero, so go no further
                if(!empty($valuearray['off'])) {
                    $value[$this->getName()]=0;
                    return $value;
                }
            }
            $valuearray=$valuearray + array('year'=>1970, 'month'=>1, 'day'=>1, 'hour'=>0, 'minute'=>0);
            $value[$this->getName()]=make_timestamp(
                                   $valuearray['year'],
                                   $valuearray['month'],
                                   $valuearray['day'],
                                   $valuearray['hour'],
                                   $valuearray['minute'],
                                   0,
                                   $this->_options['timezone'],
                                   $this->_options['applydst']);

            return $value;
        } else {

            return null;
        }
    }

    // }}}
}
?>
