lib/form/datetimeselector.php

   1 <?php
   2 // This file is part of Moodle - http://moodle.org/
   3 //
   4 // Moodle is free software: you can redistribute it and/or modify
   5 // it under the terms of the GNU General Public License as published by
   6 // the Free Software Foundation, either version 3 of the License, or
   7 // (at your option) any later version.
   8 //
   9 // Moodle is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13 //
  14 // You should have received a copy of the GNU General Public License
  15 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16
  17
  18 /**
  19  * Group of date and time input element
  20  *
  21  * Contains class for a group of elements used to input a date and time.
  22  *
  23  * @package   core_form
  24  * @copyright 2006 Jamie Pratt <me@jamiep.org>
  25  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  26  */
  27
  28 global $CFG;
  29 require_once($CFG->libdir . '/form/group.php');
  30 require_once($CFG->libdir . '/formslib.php');
  31
  32 /**
  33  * Element used to input a date and time.
  34  *
  35  * Class for a group of elements used to input a date and time.
  36  *
  37  * @package   core_form
  38  * @category  form
  39  * @copyright 2006 Jamie Pratt <me@jamiep.org>
  40  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  41  */
  42 class MoodleQuickForm_date_time_selector extends MoodleQuickForm_group {
  43
  44     /**
  45      * Options for the element.
  46      *
  47      * startyear => int start of range of years that can be selected
  48      * stopyear => int last year that can be selected
  49      * defaulttime => default time value if the field is currently not set
  50      * timezone => int|float|string (optional) timezone modifier used for edge case only.
  51      *      If not specified, then date is caclulated based on current user timezone.
  52      *      Note: dst will be calculated for string timezones only
  53      *      {@link http://docs.moodle.org/dev/Time_API#Timezone}
  54      * step => step to increment minutes by
  55      * optional => if true, show a checkbox beside the date to turn it on (or off)
  56      * @var array
  57      */
  58     protected $_options = array();
  59
  60     /**
  61      * @var array These complement separators, they are appended to the resultant HTML.
  62      */
  63     protected $_wrap = array('', '');
  64
  65     /**
  66      * @var null|bool Keeps track of whether the date selector was initialised using createElement
  67      *                or addElement. If true, createElement was used signifying the element has been
  68      *                added to a group - see MDL-39187.
  69      */
  70     protected $_usedcreateelement = true;
  71
  72     /**
  73      * Class constructor
  74      *
  75      * @param string $elementName Element's name
  76      * @param mixed $elementLabel Label(s) for an element
  77      * @param array $options Options to control the element's display
  78      * @param mixed $attributes Either a typical HTML attribute string or an associative array
  79      */
  80     public function __construct($elementName = null, $elementLabel = null, $options = array(), $attributes = null) {
  81         // Get the calendar type used - see MDL-18375.
  82         $calendartype = \core_calendar\type_factory::get_calendar_instance();
  83         $this->_options = array('startyear' => $calendartype->get_min_year(), 'stopyear' => $calendartype->get_max_year(),
  84             'defaulttime' => 0, 'timezone' => 99, 'step' => 5, 'optional' => false);
  85
  86         // TODO MDL-52313 Replace with the call to parent::__construct().
  87         HTML_QuickForm_element::__construct($elementName, $elementLabel, $attributes);
  88         $this->_persistantFreeze = true;
  89         $this->_appendName = true;
  90         $this->_type = 'date_time_selector';
  91         // set the options, do not bother setting bogus ones
  92         if (is_array($options)) {
  93             foreach ($options as $name => $value) {
  94                 if (isset($this->_options[$name])) {
  95                     if (is_array($value) && is_array($this->_options[$name])) {
  96                         $this->_options[$name] = @array_merge($this->_options[$name], $value);
  97                     } else {
  98                         $this->_options[$name] = $value;
  99                     }
 100                 }
 101             }
 102         }
 103
 104         // The YUI2 calendar only supports the gregorian calendar type.
 105         if ($calendartype->get_name() === 'gregorian') {
 106             form_init_date_js();
 107         }
 108     }
 109
 110     /**
 111      * Old syntax of class constructor. Deprecated in PHP7.
 112      *
 113      * @deprecated since Moodle 3.1
 114      */
 115     public function MoodleQuickForm_date_time_selector($elementName = null, $elementLabel = null, $options = array(), $attributes = null) {
 116         debugging('Use of class name as constructor is deprecated', DEBUG_DEVELOPER);
 117         self::__construct($elementName, $elementLabel, $options, $attributes);
 118     }
 119
 120     /**
 121      * This will create date group element constisting of day, month and year.
 122      *
 123      * @access private
 124      */
 125     function _createElements() {
 126         global $OUTPUT;
 127
 128         // Get the calendar type used - see MDL-18375.
 129         $calendartype = \core_calendar\type_factory::get_calendar_instance();
 130
 131         for ($i = 0; $i <= 23; $i++) {
 132             $hours[$i] = sprintf("%02d", $i);
 133         }
 134         for ($i = 0; $i < 60; $i += $this->_options['step']) {
 135             $minutes[$i] = sprintf("%02d", $i);
 136         }
 137
 138         $this->_elements = array();
 139         $dateformat = $calendartype->get_date_order($this->_options['startyear'], $this->_options['stopyear']);
 140         if (right_to_left()) {   // Display time to the right of date, in RTL mode.
 141             $this->_elements[] = $this->createFormElement('select', 'minute', get_string('minute', 'form'),
 142                 $minutes, $this->getAttributes(), true);
 143             $this->_elements[] = $this->createFormElement('select', 'hour', get_string('hour', 'form'),
 144                 $hours, $this->getAttributes(), true);
 145             // Reverse date element (Should be: Day, Month, Year), in RTL mode.
 146             $dateformat = array_reverse($dateformat);
 147         }
 148         foreach ($dateformat as $key => $date) {
 149             // E_STRICT creating elements without forms is nasty because it internally uses $this
 150             $this->_elements[] = $this->createFormElement('select', $key, get_string($key, 'form'), $date, $this->getAttributes(), true);
 151         }
 152         if (!right_to_left()) {   // Display time to the left of date, in LTR mode.
 153             $this->_elements[] = $this->createFormElement('select', 'hour', get_string('hour', 'form'), $hours,
 154                 $this->getAttributes(), true);
 155             $this->_elements[] = $this->createFormElement('select', 'minute', get_string('minute', 'form'), $minutes,
 156                 $this->getAttributes(), true);
 157         }
 158         // The YUI2 calendar only supports the gregorian calendar type so only display the calendar image if this is being used.
 159         if ($calendartype->get_name() === 'gregorian') {
 160             $image = $OUTPUT->pix_icon('i/calendar', get_string('calendar', 'calendar'), 'moodle');
 161             $this->_elements[] = $this->createFormElement('link', 'calendar',
 162                     null, '#', $image,
 163                     array('class' => 'visibleifjs'));
 164         }
 165         // If optional we add a checkbox which the user can use to turn if on
 166         if ($this->_options['optional']) {
 167             $this->_elements[] = $this->createFormElement('checkbox', 'enabled', null, get_string('enable'), $this->getAttributes(), true);
 168         }
 169         foreach ($this->_elements as $element){
 170             if (method_exists($element, 'setHiddenLabel')){
 171                 $element->setHiddenLabel(true);
 172             }
 173         }
 174
 175     }
 176
 177     /**
 178      * Called by HTML_QuickForm whenever form event is made on this element
 179      *
 180      * @param string $event Name of event
 181      * @param mixed $arg event arguments
 182      * @param object $caller calling object
 183      * @return bool
 184      */
 185     function onQuickFormEvent($event, $arg, &$caller) {
 186         $this->setMoodleForm($caller);
 187         switch ($event) {
 188             case 'updateValue':
 189                 // Constant values override both default and submitted ones
 190                 // default values are overriden by submitted.
 191                 $value = $this->_findValue($caller->_constantValues);
 192                 if (null === $value) {
 193                     // If no boxes were checked, then there is no value in the array
 194                     // yet we don't want to display default value in this case.
 195                     if ($caller->isSubmitted()) {
 196                         $value = $this->_findValue($caller->_submitValues);
 197                     } else {
 198                         $value = $this->_findValue($caller->_defaultValues);
 199                     }
 200                 }
 201                 $requestvalue=$value;
 202                 if ($value == 0) {
 203                     $value = $this->_options['defaulttime'];
 204                     if (!$value) {
 205                         $value = time();
 206                     }
 207                 }
 208                 if (!is_array($value)) {
 209                     $calendartype = \core_calendar\type_factory::get_calendar_instance();
 210                     $currentdate = $calendartype->timestamp_to_date_array($value, $this->_options['timezone']);
 211                     // Round minutes to the previous multiple of step.
 212                     $currentdate['minutes'] -= $currentdate['minutes'] % $this->_options['step'];
 213                     $value = array(
 214                         'minute' => $currentdate['minutes'],
 215                         'hour' => $currentdate['hours'],
 216                         'day' => $currentdate['mday'],
 217                         'month' => $currentdate['mon'],
 218                         'year' => $currentdate['year']);
 219                     // If optional, default to off, unless a date was provided.
 220                     if ($this->_options['optional']) {
 221                         $value['enabled'] = $requestvalue != 0;
 222                     }
 223                 } else {
 224                     $value['enabled'] = isset($value['enabled']);
 225                 }
 226                 if (null !== $value) {
 227                     $this->setValue($value);
 228                 }
 229                 break;
 230             case 'createElement':
 231                 if ($arg[2]['optional']) {
 232                     // When using the function addElement, rather than createElement, we still
 233                     // enter this case, making this check necessary.
 234                     if ($this->_usedcreateelement) {
 235                         $caller->disabledIf($arg[0] . '[day]', $arg[0] . '[enabled]');
 236                         $caller->disabledIf($arg[0] . '[month]', $arg[0] . '[enabled]');
 237                         $caller->disabledIf($arg[0] . '[year]', $arg[0] . '[enabled]');
 238                         $caller->disabledIf($arg[0] . '[hour]', $arg[0] . '[enabled]');
 239                         $caller->disabledIf($arg[0] . '[minute]', $arg[0] . '[enabled]');
 240                     } else {
 241                         $caller->disabledIf($arg[0], $arg[0] . '[enabled]');
 242                     }
 243                 }
 244                 return parent::onQuickFormEvent($event, $arg, $caller);
 245                 break;
 246             case 'addElement':
 247                 $this->_usedcreateelement = false;
 248                 return parent::onQuickFormEvent($event, $arg, $caller);
 249                 break;
 250             default:
 251                 return parent::onQuickFormEvent($event, $arg, $caller);
 252         }
 253     }
 254
 255     /**
 256      * Returns HTML for advchecbox form element.
 257      *
 258      * @return string
 259      */
 260     function toHtml() {
 261         include_once('HTML/QuickForm/Renderer/Default.php');
 262         $renderer = new HTML_QuickForm_Renderer_Default();
 263         $renderer->setElementTemplate('{element}');
 264         parent::accept($renderer);
 265
 266         $html = $this->_wrap[0];
 267         if ($this->_usedcreateelement) {
 268             $html .= html_writer::tag('span', $renderer->toHtml(), array('class' => 'fdate_time_selector'));
 269         } else {
 270             $html .= $renderer->toHtml();
 271         }
 272         $html .= $this->_wrap[1];
 273
 274         return $html;
 275     }
 276
 277     /**
 278      * Accepts a renderer
 279      *
 280      * @param HTML_QuickForm_Renderer $renderer An HTML_QuickForm_Renderer object
 281      * @param bool $required Whether a group is required
 282      * @param string $error An error message associated with a group
 283      */
 284     function accept(&$renderer, $required = false, $error = null) {
 285         $renderer->renderElement($this, $required, $error);
 286     }
 287
 288     /**
 289      * Output a timestamp. Give it the name of the group.
 290      *
 291      * @param array $submitValues values submitted.
 292      * @param bool $assoc specifies if returned array is associative
 293      * @return array
 294      */
 295     function exportValue(&$submitValues, $assoc = false) {
 296         $valuearray = array();
 297         foreach ($this->_elements as $element){
 298             $thisexport = $element->exportValue($submitValues[$this->getName()], true);
 299             if ($thisexport!=null){
 300                 $valuearray += $thisexport;
 301             }
 302         }
 303         if (count($valuearray)){
 304             if($this->_options['optional']) {
 305                 // If checkbox is on, the value is zero, so go no further
 306                 if(empty($valuearray['enabled'])) {
 307                     return $this->_prepareValue(0, $assoc);
 308                 }
 309             }
 310             // Get the calendar type used - see MDL-18375.
 311             $calendartype = \core_calendar\type_factory::get_calendar_instance();
 312             $gregoriandate = $calendartype->convert_to_gregorian($valuearray['year'],
 313                                                                  $valuearray['month'],
 314                                                                  $valuearray['day'],
 315                                                                  $valuearray['hour'],
 316                                                                  $valuearray['minute']);
 317             $value = make_timestamp($gregoriandate['year'],
 318                                                       $gregoriandate['month'],
 319                                                       $gregoriandate['day'],
 320                                                       $gregoriandate['hour'],
 321                                                       $gregoriandate['minute'],
 322                                                       0,
 323                                                       $this->_options['timezone'],
 324                                                       true);
 325
 326             return $this->_prepareValue($value, $assoc);
 327         } else {
 328             return null;
 329         }
 330     }
 331 }