lib/form/datetimeselector.php

   1 <?php
   2 global $CFG;
   3 require_once "$CFG->libdir/form/group.php";
   4 require_once "$CFG->libdir/formslib.php";
   5
   6 /**
   7  * Class for a group of elements used to input a date and time.
   8  *
   9  * Emulates moodle print_date_selector function and also allows you to select a time.
  10  *
  11  * @author Jamie Pratt <me@jamiep.org>
  12  * @access public
  13  */
  14 class MoodleQuickForm_date_time_selector extends MoodleQuickForm_group{
  15     /**
  16     * Options for the element
  17     *
  18     * startyear => integer start of range of years that can be selected
  19     * stopyear => integer last year that can be selected
  20     * timezone => float/string timezone
  21     * applydst => apply users daylight savings adjustment?
  22     * step     => step to increment minutes by
  23     */
  24     var $_options = array('startyear'=>1970, 'stopyear'=>2020,
  25                     'timezone'=>99, 'applydst'=>true, 'step'=>5, 'optional'=>false);
  26
  27    /**
  28     * These complement separators, they are appended to the resultant HTML
  29     * @access   private
  30     * @var      array
  31     */
  32     var $_wrap = array('', '');
  33
  34    /**
  35     * Class constructor
  36     *
  37     * @access   public
  38     * @param    string  Element's name
  39     * @param    mixed   Label(s) for an element
  40     * @param    array   Options to control the element's display
  41     * @param    mixed   Either a typical HTML attribute string or an associative array
  42     */
  43     function MoodleQuickForm_date_time_selector($elementName = null, $elementLabel = null, $options = array(), $attributes = null)
  44     {
  45         $this->HTML_QuickForm_element($elementName, $elementLabel, $attributes);
  46         $this->_persistantFreeze = true;
  47         $this->_appendName = true;
  48         $this->_type = 'date_time_selector';
  49         // set the options, do not bother setting bogus ones
  50         if (is_array($options)) {
  51             foreach ($options as $name => $value) {
  52                 if (isset($this->_options[$name])) {
  53                     if (is_array($value) && is_array($this->_options[$name])) {
  54                         $this->_options[$name] = @array_merge($this->_options[$name], $value);
  55                     } else {
  56                         $this->_options[$name] = $value;
  57                     }
  58                 }
  59             }
  60         }
  61     }
  62
  63     // }}}
  64     // {{{ _createElements()
  65
  66     function _createElements()
  67     {
  68         $this->_elements = array();
  69         for ($i=1; $i<=31; $i++) {
  70             $days[$i] = $i;
  71         }
  72         for ($i=1; $i<=12; $i++) {
  73             $months[$i] = userdate(gmmktime(12,0,0,$i,15,2000), "%B");
  74         }
  75         for ($i=$this->_options['startyear']; $i<=$this->_options['stopyear']; $i++) {
  76             $years[$i] = $i;
  77         }
  78         for ($i=0; $i<=23; $i++) {
  79             $hours[$i] = sprintf("%02d",$i);
  80         }
  81         for ($i=0; $i<60; $i+=$this->_options['step']) {
  82             $minutes[$i] = sprintf("%02d",$i);
  83         }
  84         $this->_elements[] =& MoodleQuickForm::createElement('select', 'day', get_string('day', 'form'), $days, $this->getAttributes(), true);
  85         $this->_elements[] =& MoodleQuickForm::createElement('select', 'month', get_string('month', 'form'), $months, $this->getAttributes(), true);
  86         $this->_elements[] =& MoodleQuickForm::createElement('select', 'year', get_string('year', 'form'), $years, $this->getAttributes(), true);
  87         $this->_elements[] =& MoodleQuickForm::createElement('select', 'hour', get_string('hour', 'form'), $hours, $this->getAttributes(), true);
  88         $this->_elements[] =& MoodleQuickForm::createElement('select', 'minute', get_string('minute', 'form'), $minutes, $this->getAttributes(), true);
  89         // If optional we add a checkbox which the user can use to turn if on
  90         if($this->_options['optional']) {
  91             $this->_elements[] =& MoodleQuickForm::createElement('checkbox', 'off', null, get_string('disable'), $this->getAttributes(), true);
  92         }
  93         foreach ($this->_elements as $element){
  94             if (method_exists($element, 'setHiddenLabel')){
  95                 $element->setHiddenLabel(true);
  96             }
  97         }
  98
  99     }
 100
 101     // }}}
 102     // {{{ onQuickFormEvent()
 103
 104     /**
 105      * Called by HTML_QuickForm whenever form event is made on this element
 106      *
 107      * @param     string    $event  Name of event
 108      * @param     mixed     $arg    event arguments
 109      * @param     object    $caller calling object
 110      * @since     1.0
 111      * @access    public
 112      * @return    void
 113      */
 114     function onQuickFormEvent($event, $arg, &$caller)
 115     {
 116         switch ($event) {
 117             case 'updateValue':
 118                 // constant values override both default and submitted ones
 119                 // default values are overriden by submitted
 120                 $value = $this->_findValue($caller->_constantValues);
 121                 if (null === $value) {
 122                     // if no boxes were checked, then there is no value in the array
 123                     // yet we don't want to display default value in this case
 124                     if ($caller->isSubmitted()) {
 125                         $value = $this->_findValue($caller->_submitValues);
 126                     } else {
 127                         $value = $this->_findValue($caller->_defaultValues);
 128                     }
 129                 }
 130                 $requestvalue=$value;
 131                 if ($value == 0) {
 132                     $value = time();
 133                 }
 134                 if (!is_array($value)) {
 135                     $currentdate = usergetdate($value);
 136                     $value = array(
 137                         'minute' => $currentdate['minutes'],
 138                         'hour' => $currentdate['hours'],
 139                         'day' => $currentdate['mday'],
 140                         'month' => $currentdate['mon'],
 141                         'year' => $currentdate['year']);
 142                     // If optional, default to off, unless a date was provided
 143                      if($this->_options['optional']) {
 144                         $value['off'] = ($requestvalue == 0) ? true : false;
 145                     }
 146                } else {
 147                    $value['off'] = (isset($value['off'])) ? true : false;
 148                }
 149                 if (null !== $value){
 150                     $this->setValue($value);
 151                 }
 152                 break;
 153             case 'createElement':
 154                 if($arg[2]['optional']) {
 155                     $caller->disabledIf($arg[0], $arg[0].'[off]', 'checked');
 156                 }
 157                 return parent::onQuickFormEvent($event, $arg, $caller);
 158                 break;
 159             default:
 160                 return parent::onQuickFormEvent($event, $arg, $caller);
 161         }
 162     }
 163
 164     // }}}
 165     // {{{ toHtml()
 166
 167     function toHtml()
 168     {
 169         include_once('HTML/QuickForm/Renderer/Default.php');
 170         $renderer =& new HTML_QuickForm_Renderer_Default();
 171         $renderer->setElementTemplate('{element}');
 172         parent::accept($renderer);
 173         return $this->_wrap[0] . $renderer->toHtml() . $this->_wrap[1];
 174     }
 175
 176     // }}}
 177     // {{{ accept()
 178
 179     function accept(&$renderer, $required = false, $error = null)
 180     {
 181         $renderer->renderElement($this, $required, $error);
 182     }
 183
 184     // }}}
 185
 186     /**
 187      * Output a timestamp. Give it the name of the group.
 188      *
 189      * @param array $submitValues
 190      * @param bool $assoc
 191      * @return array
 192      */
 193     function exportValue(&$submitValues, $assoc = false)
 194     {
 195         $value = null;
 196         $valuearray = array();
 197         foreach ($this->_elements as $element){
 198             $thisexport = $element->exportValue($submitValues[$this->getName()], true);
 199             if ($thisexport!=null){
 200                 $valuearray += $thisexport;
 201             }
 202         }
 203         if (count($valuearray)){
 204             if($this->_options['optional']) {
 205                 // If checkbox is on, the value is zero, so go no further
 206                 if(!empty($valuearray['off'])) {
 207                     $value[$this->getName()]=0;
 208                     return $value;
 209                 }
 210             }
 211             $valuearray=$valuearray + array('year'=>1970, 'month'=>1, 'day'=>1, 'hour'=>0, 'minute'=>0);
 212             $value[$this->getName()]=make_timestamp(
 213                                    $valuearray['year'],
 214                                    $valuearray['month'],
 215                                    $valuearray['day'],
 216                                    $valuearray['hour'],
 217                                    $valuearray['minute'],
 218                                    0,
 219                                    $this->_options['timezone'],
 220                                    $this->_options['applydst']);
 221
 222             return $value;
 223         } else {
 224
 225             return null;
 226         }
 227     }
 228
 229     // }}}
 230 }
 231 ?>