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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   * Delete book chapter
  19   *
  20   * @package    mod_book
  21   * @copyright  2004-2011 Petr Skoda {@link http://skodak.org}
  22   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23   */
  24  
  25  require(__DIR__.'/../../config.php');
  26  require_once (__DIR__.'/locallib.php');
  27  
  28  $id        = required_param('id', PARAM_INT);        // Course Module ID
  29  $chapterid = required_param('chapterid', PARAM_INT); // Chapter ID
  30  $confirm   = optional_param('confirm', 0, PARAM_BOOL);
  31  
  32  $cm = get_coursemodule_from_id('book', $id, 0, false, MUST_EXIST);
  33  $course = $DB->get_record('course', array('id'=>$cm->course), '*', MUST_EXIST);
  34  $book = $DB->get_record('book', array('id'=>$cm->instance), '*', MUST_EXIST);
  35  
  36  require_login($course, false, $cm);
  37  require_sesskey();
  38  
  39  $context = context_module::instance($cm->id);
  40  require_capability('mod/book:edit', $context);
  41  
  42  $PAGE->set_url('/mod/book/delete.php', array('id'=>$id, 'chapterid'=>$chapterid));
  43  
  44  $chapter = $DB->get_record('book_chapters', array('id'=>$chapterid, 'bookid'=>$book->id), '*', MUST_EXIST);
  45  
  46  
  47  // Header and strings.
  48  $PAGE->set_title($book->name);
  49  $PAGE->set_heading($course->fullname);
  50  
  51  // Form processing.
  52  if ($confirm) {  // the operation was confirmed.
  53      $fs = get_file_storage();
  54      if (!$chapter->subchapter) { // Delete all its sub-chapters if any
  55          $chapters = $DB->get_recordset('book_chapters', array('bookid'=>$book->id), 'pagenum');
  56          $found = false;
  57          foreach ($chapters as $ch) {
  58              if ($ch->id == $chapter->id) {
  59                  $found = true;
  60              } else if ($found and $ch->subchapter) {
  61                  $fs->delete_area_files($context->id, 'mod_book', 'chapter', $ch->id);
  62                  $DB->delete_records('book_chapters', array('id'=>$ch->id));
  63                  \mod_book\event\chapter_deleted::create_from_chapter($book, $context, $ch)->trigger();
  64              } else if ($found) {
  65                  break;
  66              }
  67          }
  68          $chapters->close();
  69      }
  70      $fs->delete_area_files($context->id, 'mod_book', 'chapter', $chapter->id);
  71      $DB->delete_records('book_chapters', array('id'=>$chapter->id));
  72  
  73      \mod_book\event\chapter_deleted::create_from_chapter($book, $context, $chapter)->trigger();
  74  
  75      book_preload_chapters($book); // Fix structure.
  76      $DB->set_field('book', 'revision', $book->revision+1, array('id'=>$book->id));
  77  
  78      redirect('view.php?id='.$cm->id);
  79  }
  80  
  81  echo $OUTPUT->header();
  82  echo $OUTPUT->heading($book->name);
  83  
  84  // The operation has not been confirmed yet so ask the user to do so.
  85  if ($chapter->subchapter) {
  86      $strconfirm = get_string('confchapterdelete', 'mod_book');
  87  } else {
  88      $strconfirm = get_string('confchapterdeleteall', 'mod_book');
  89  }
  90  echo '<br />';
  91  $continue = new moodle_url('/mod/book/delete.php', array('id'=>$cm->id, 'chapterid'=>$chapter->id, 'confirm'=>1));
  92  $cancel = new moodle_url('/mod/book/view.php', array('id'=>$cm->id, 'chapterid'=>$chapter->id));
  93  $title = format_string($chapter->title);
  94  echo $OUTPUT->confirm("<strong>$title</strong><p>$strconfirm</p>", $continue, $cancel);
  95  
  96  echo $OUTPUT->footer();