lib/form/filepicker.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  * Filepicker form element
  20  *
  21  * Contains HTML class for a single filepicker form element
  22  *
  23  * @package   core_form
  24  * @copyright 2009 Dongsheng Cai <dongsheng@moodle.com>
  25  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  26  */
  27
  28 global $CFG;
  29
  30 require_once("HTML/QuickForm/button.php");
  31 require_once($CFG->dirroot.'/repository/lib.php');
  32 require_once('templatable_form_element.php');
  33
  34 /**
  35  * Filepicker form element
  36  *
  37  * HTML class for a single filepicker element (based on button)
  38  *
  39  * @package   core_form
  40  * @category  form
  41  * @copyright 2009 Dongsheng Cai <dongsheng@moodle.com>
  42  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  43  */
  44 class MoodleQuickForm_filepicker extends HTML_QuickForm_input implements templatable {
  45     use templatable_form_element {
  46         export_for_template as export_for_template_base;
  47     }
  48     /** @var string html for help button, if empty then no help will icon will be dispalyed. */
  49     public $_helpbutton = '';
  50
  51     /** @var array options provided to initalize filemanager */
  52     // PHP doesn't support 'key' => $value1 | $value2 in class definition
  53     // We cannot do $_options = array('return_types'=> FILE_INTERNAL | FILE_REFERENCE);
  54     // So I have to set null here, and do it in constructor
  55     protected $_options    = array('maxbytes'=>0, 'accepted_types'=>'*', 'return_types'=>null);
  56
  57     /**
  58      * Constructor
  59      *
  60      * @param string $elementName (optional) name of the filepicker
  61      * @param string $elementLabel (optional) filepicker label
  62      * @param array $attributes (optional) Either a typical HTML attribute string
  63      *              or an associative array
  64      * @param array $options set of options to initalize filepicker
  65      */
  66     public function __construct($elementName=null, $elementLabel=null, $attributes=null, $options=null) {
  67         global $CFG, $PAGE;
  68
  69         $options = (array)$options;
  70         foreach ($options as $name=>$value) {
  71             if (array_key_exists($name, $this->_options)) {
  72                 $this->_options[$name] = $value;
  73             }
  74         }
  75         if (empty($options['return_types'])) {
  76             $this->_options['return_types'] = FILE_INTERNAL;
  77         }
  78         $fpmaxbytes = 0;
  79         if (!empty($options['maxbytes'])) {
  80             $fpmaxbytes = $options['maxbytes'];
  81         }
  82         $coursemaxbytes = 0;
  83         if (!empty($PAGE->course->maxbytes)) {
  84             $coursemaxbytes = $PAGE->course->maxbytes;
  85         }
  86         $this->_options['maxbytes'] = get_user_max_upload_file_size($PAGE->context, $CFG->maxbytes, $coursemaxbytes, $fpmaxbytes);
  87         $this->_type = 'filepicker';
  88         parent::__construct($elementName, $elementLabel, $attributes);
  89     }
  90
  91     /**
  92      * Old syntax of class constructor. Deprecated in PHP7.
  93      *
  94      * @deprecated since Moodle 3.1
  95      */
  96     public function MoodleQuickForm_filepicker($elementName=null, $elementLabel=null, $attributes=null, $options=null) {
  97         debugging('Use of class name as constructor is deprecated', DEBUG_DEVELOPER);
  98         self::__construct($elementName, $elementLabel, $attributes, $options);
  99     }
 100
 101     /**
 102      * Returns html for help button.
 103      *
 104      * @return string html for help button
 105      */
 106     function getHelpButton() {
 107         return $this->_helpbutton;
 108     }
 109
 110     /**
 111      * Returns type of filepicker element
 112      *
 113      * @return string
 114      */
 115     function getElementTemplateType() {
 116         if ($this->_flagFrozen){
 117             return 'nodisplay';
 118         } else {
 119             return 'default';
 120         }
 121     }
 122
 123     /**
 124      * Returns HTML for filepicker form element.
 125      *
 126      * @return string
 127      */
 128     function toHtml() {
 129         global $CFG, $COURSE, $USER, $PAGE, $OUTPUT;
 130         $id     = $this->_attributes['id'];
 131         $elname = $this->_attributes['name'];
 132
 133         if ($this->_flagFrozen) {
 134             return $this->getFrozenHtml();
 135         }
 136         if (!$draftitemid = (int)$this->getValue()) {
 137             // no existing area info provided - let's use fresh new draft area
 138             $draftitemid = file_get_unused_draft_itemid();
 139             $this->setValue($draftitemid);
 140         }
 141
 142         if ($COURSE->id == SITEID) {
 143             $context = context_system::instance();
 144         } else {
 145             $context = context_course::instance($COURSE->id);
 146         }
 147
 148         $client_id = uniqid();
 149
 150         $args = new stdClass();
 151         // need these three to filter repositories list
 152         $args->accepted_types = $this->_options['accepted_types']?$this->_options['accepted_types']:'*';
 153         $args->return_types = $this->_options['return_types'];
 154         $args->itemid = $draftitemid;
 155         $args->maxbytes = $this->_options['maxbytes'];
 156         $args->context = $PAGE->context;
 157         $args->buttonname = $elname.'choose';
 158         $args->elementname = $elname;
 159
 160         $html = $this->_getTabs();
 161         $fp = new file_picker($args);
 162         $options = $fp->options;
 163         $options->context = $PAGE->context;
 164         $html .= $OUTPUT->render($fp);
 165         $html .= '<input type="hidden" name="'.$elname.'" id="'.$id.'" value="'.$draftitemid.'" class="filepickerhidden"/>';
 166
 167         $module = array('name'=>'form_filepicker', 'fullpath'=>'/lib/form/filepicker.js', 'requires'=>array('core_filepicker', 'node', 'node-event-simulate', 'core_dndupload'));
 168         $PAGE->requires->js_init_call('M.form_filepicker.init', array($fp->options), true, $module);
 169
 170         $nonjsfilepicker = new moodle_url('/repository/draftfiles_manager.php', array(
 171             'env'=>'filepicker',
 172             'action'=>'browse',
 173             'itemid'=>$draftitemid,
 174             'subdirs'=>0,
 175             'maxbytes'=>$options->maxbytes,
 176             'maxfiles'=>1,
 177             'ctx_id'=>$PAGE->context->id,
 178             'course'=>$PAGE->course->id,
 179             'sesskey'=>sesskey(),
 180             ));
 181
 182         // non js file picker
 183         $html .= '<noscript>';
 184         $html .= "<div><object type='text/html' data='$nonjsfilepicker' height='160' width='600' style='border:1px solid #000'></object></div>";
 185         $html .= '</noscript>';
 186
 187         if (!empty($options->accepted_types) && $options->accepted_types != '*') {
 188             $html .= html_writer::tag('p', get_string('filesofthesetypes', 'form'));
 189             $util = new \core_form\filetypes_util();
 190             $filetypes = $options->accepted_types;
 191             $filetypedescriptions = $util->describe_file_types($filetypes);
 192             $html .= $OUTPUT->render_from_template('core_form/filetypes-descriptions', $filetypedescriptions);
 193         }
 194
 195         return $html;
 196     }
 197
 198     /**
 199      * export uploaded file
 200      *
 201      * @param array $submitValues values submitted.
 202      * @param bool $assoc specifies if returned array is associative
 203      * @return array
 204      */
 205     function exportValue(&$submitValues, $assoc = false) {
 206         global $USER;
 207
 208         $draftitemid = $this->_findValue($submitValues);
 209         if (null === $draftitemid) {
 210             $draftitemid = $this->getValue();
 211         }
 212
 213         // make sure max one file is present and it is not too big
 214         if (!is_null($draftitemid)) {
 215             $fs = get_file_storage();
 216             $usercontext = context_user::instance($USER->id);
 217             if ($files = $fs->get_area_files($usercontext->id, 'user', 'draft', $draftitemid, 'id DESC', false)) {
 218                 $file = array_shift($files);
 219                 if ($this->_options['maxbytes']
 220                     and $this->_options['maxbytes'] !== USER_CAN_IGNORE_FILE_SIZE_LIMITS
 221                     and $file->get_filesize() > $this->_options['maxbytes']) {
 222
 223                     // bad luck, somebody tries to sneak in oversized file
 224                     $file->delete();
 225                 }
 226                 foreach ($files as $file) {
 227                     // only one file expected
 228                     $file->delete();
 229                 }
 230             }
 231         }
 232
 233         return $this->_prepareValue($draftitemid, true);
 234     }
 235
 236     public function export_for_template(renderer_base $output) {
 237         $context = $this->export_for_template_base($output);
 238         $context['html'] = $this->toHtml();
 239         return $context;
 240     }
 241
 242     /**
 243      * Check that the file has the allowed type.
 244      *
 245      * @param array $value Draft item id with the uploaded files.
 246      * @return string|null Validation error message or null.
 247      */
 248     public function validateSubmitValue($value) {
 249
 250         $filetypesutil = new \core_form\filetypes_util();
 251         $whitelist = $filetypesutil->normalize_file_types($this->_options['accepted_types']);
 252
 253         if (empty($whitelist) || $whitelist === ['*']) {
 254             // Any file type is allowed, nothing to check here.
 255             return;
 256         }
 257
 258         $draftfiles = file_get_drafarea_files($value);
 259         $wrongfiles = array();
 260
 261         if (empty($draftfiles)) {
 262             // No file uploaded, nothing to check here.
 263             return;
 264         }
 265
 266         foreach ($draftfiles->list as $file) {
 267             if (!$filetypesutil->is_allowed_file_type($file->filename, $whitelist)) {
 268                 $wrongfiles[] = $file->filename;
 269             }
 270         }
 271
 272         if ($wrongfiles) {
 273             $a = array(
 274                 'whitelist' => implode(', ', $whitelist),
 275                 'wrongfiles' => implode(', ', $wrongfiles),
 276             );
 277             return get_string('err_wrongfileextension', 'core_form', $a);
 278         }
 279
 280         return;
 281     }
 282 }