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   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   * Question bank columns for the preview action icon.
  19   *
  20   * @package   core_question
  21   * @copyright 2009 Tim Hunt
  22   * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23   */
  24  
  25  namespace core_question\bank;
  26  defined('MOODLE_INTERNAL') || die();
  27  
  28  
  29  /**
  30   * Question bank columns for the preview action icon.
  31   *
  32   * @copyright 2009 Tim Hunt
  33   * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  34   */
  35  class preview_action_column extends action_column_base implements menuable_action {
  36      /**
  37       * @var string store this lang string for performance.
  38       */
  39      protected $strpreview;
  40  
  41      public function init() {
  42          parent::init();
  43          $this->strpreview = get_string('preview');
  44      }
  45  
  46      public function get_name() {
  47          return 'previewaction';
  48      }
  49  
  50      protected function display_content($question, $rowclasses) {
  51          global $PAGE;
  52  
  53          if (!\question_bank::is_qtype_installed($question->qtype)) {
  54              // It sometimes happens that people end up with junk questions
  55              // in their question bank of a type that is no longer installed.
  56              // We cannot do most actions on them, because that leads to errors.
  57              return;
  58          }
  59  
  60          if (question_has_capability_on($question, 'use')) {
  61              echo $PAGE->get_renderer('core_question')->question_preview_link(
  62                      $question->id, $this->qbank->get_most_specific_context(), false);
  63          }
  64      }
  65  
  66      public function get_action_menu_link(\stdClass $question): ?\action_menu_link {
  67          if (!\question_bank::is_qtype_installed($question->qtype)) {
  68              // It sometimes happens that people end up with junk questions
  69              // in their question bank of a type that is no longer installed.
  70              // We cannot do most actions on them, because that leads to errors.
  71              return null;
  72          }
  73  
  74          if (!question_has_capability_on($question, 'use')) {
  75              return null;
  76          }
  77  
  78          $context = $this->qbank->get_most_specific_context();
  79          $url = question_preview_url($question->id, null, null, null, null, $context);
  80          return new \action_menu_link_secondary($url, new \pix_icon('t/preview', ''),
  81                  $this->strpreview, ['target' => 'questionpreview']);
  82      }
  83  }