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Differences Between: [Versions 311 and 401] [Versions 311 and 402] [Versions 311 and 403]

   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   * Book imscp export lib
  19   *
  20   * @package    booktool_exportimscp
  21   * @copyright  2001-3001 Antonio Vicent          {@link http://ludens.es}
  22   * @copyright  2001-3001 Eloy Lafuente (stronk7) {@link http://stronk7.com}
  23   * @copyright  2011 Petr Skoda                   {@link http://skodak.org}
  24   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  25   */
  26  
  27  defined('MOODLE_INTERNAL') || die;
  28  
  29  require_once (__DIR__.'/lib.php');
  30  require_once($CFG->dirroot.'/mod/book/locallib.php');
  31  
  32  /**
  33   * Export one book as IMSCP package
  34   *
  35   * @param stdClass $book book instance
  36   * @param context_module $context
  37   * @return bool|stored_file
  38   */
  39  function booktool_exportimscp_build_package($book, $context) {
  40      global $DB;
  41  
  42      $fs = get_file_storage();
  43  
  44      if ($packagefile = $fs->get_file($context->id, 'booktool_exportimscp', 'package', $book->revision, '/', 'imscp.zip')) {
  45          return $packagefile;
  46      }
  47  
  48      // fix structure and test if chapters present
  49      if (!book_preload_chapters($book)) {
  50          print_error('nochapters', 'booktool_exportimscp');
  51      }
  52  
  53      // prepare temp area with package contents
  54      booktool_exportimscp_prepare_files($book, $context);
  55  
  56      $packer = get_file_packer('application/zip');
  57      $areafiles = $fs->get_area_files($context->id, 'booktool_exportimscp', 'temp', $book->revision, "sortorder, itemid, filepath, filename", false);
  58      $files = array();
  59      foreach ($areafiles as $file) {
  60          $path = $file->get_filepath().$file->get_filename();
  61          $path = ltrim($path, '/');
  62          $files[$path] = $file;
  63      }
  64      unset($areafiles);
  65      $packagefile = $packer->archive_to_storage($files, $context->id, 'booktool_exportimscp', 'package', $book->revision, '/', 'imscp.zip');
  66  
  67      // drop temp area
  68      $fs->delete_area_files($context->id, 'booktool_exportimscp', 'temp', $book->revision);
  69  
  70      // delete older versions
  71      $sql = "SELECT DISTINCT itemid
  72                FROM {files}
  73               WHERE contextid = :contextid AND component = 'booktool_exportimscp' AND itemid < :revision";
  74      $params = array('contextid'=>$context->id, 'revision'=>$book->revision);
  75      $revisions = $DB->get_records_sql($sql, $params);
  76      foreach ($revisions as $rev => $unused) {
  77          $fs->delete_area_files($context->id, 'booktool_exportimscp', 'temp', $rev);
  78          $fs->delete_area_files($context->id, 'booktool_exportimscp', 'package', $rev);
  79      }
  80  
  81      return $packagefile;
  82  }
  83  
  84  /**
  85   * Prepare temp area with the files used by book html contents
  86   *
  87   * @param stdClass $book book instance
  88   * @param context_module $context
  89   */
  90  function booktool_exportimscp_prepare_files($book, $context) {
  91      global $CFG, $DB;
  92  
  93      $fs = get_file_storage();
  94  
  95      $temp_file_record = array('contextid'=>$context->id, 'component'=>'booktool_exportimscp', 'filearea'=>'temp', 'itemid'=>$book->revision);
  96      $chapters = $DB->get_records('book_chapters', array('bookid'=>$book->id), 'pagenum');
  97      $chapterresources = array();
  98      foreach ($chapters as $chapter) {
  99          $chapterresources[$chapter->id] = array();
 100          $files = $fs->get_area_files($context->id, 'mod_book', 'chapter', $chapter->id, "sortorder, itemid, filepath, filename", false);
 101          foreach ($files as $file) {
 102              $temp_file_record['filepath'] = '/'.$chapter->pagenum.$file->get_filepath();
 103              $fs->create_file_from_storedfile($temp_file_record, $file);
 104              $chapterresources[$chapter->id][] = $chapter->pagenum.$file->get_filepath().$file->get_filename();
 105          }
 106          if ($file = $fs->get_file($context->id, 'booktool_exportimscp', 'temp', $book->revision, "/$chapter->pagenum/", 'index.html')) {
 107              // this should not exist
 108              $file->delete();
 109          }
 110          $content = booktool_exportimscp_chapter_content($chapter, $context);
 111          $index_file_record = array('contextid'=>$context->id, 'component'=>'booktool_exportimscp', 'filearea'=>'temp',
 112                  'itemid'=>$book->revision, 'filepath'=>"/$chapter->pagenum/", 'filename'=>'index.html');
 113          $fs->create_file_from_string($index_file_record, $content);
 114      }
 115  
 116      $css_file_record = array('contextid'=>$context->id, 'component'=>'booktool_exportimscp', 'filearea'=>'temp',
 117              'itemid'=>$book->revision, 'filepath'=>"/css/", 'filename'=>'styles.css');
 118      $fs->create_file_from_pathname($css_file_record, __DIR__.'/imscp.css');
 119  
 120      // Init imsmanifest and others
 121      $imsmanifest = '';
 122      $imsitems = '';
 123      $imsresources = '';
 124  
 125      // Moodle and Book version
 126      $moodle_release = $CFG->release;
 127      $moodle_version = $CFG->version;
 128      $book_version   = get_config('mod_book', 'version');
 129      $bookname       = format_string($book->name, true, array('context'=>$context));
 130  
 131      // Load manifest header
 132          $imsmanifest .= '<?xml version="1.0" encoding="UTF-8"?>
 133  <!-- This package has been created with Moodle ' . $moodle_release . ' (' . $moodle_version . ') http://moodle.org/, Book module version ' . $book_version . ' - https://github.com/skodak/moodle-mod_book -->
 134  <!-- One idea and implementation by Eloy Lafuente (stronk7) and Antonio Vicent (C) 2001-3001 -->
 135  <manifest xmlns="http://www.imsglobal.org/xsd/imscp_v1p1" xmlns:imsmd="http://www.imsglobal.org/xsd/imsmd_v1p2" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" identifier="MANIFEST-' . md5($CFG->wwwroot . '-' . $book->course . '-' . $book->id) . '" xsi:schemaLocation="http://www.imsglobal.org/xsd/imscp_v1p1 imscp_v1p1.xsd http://www.imsglobal.org/xsd/imsmd_v1p2 imsmd_v1p2p2.xsd">
 136    <organizations default="MOODLE-' . $book->course . '-' . $book->id . '">
 137      <organization identifier="MOODLE-' . $book->course . '-' . $book->id . '" structure="hierarchical">
 138        <title>' . htmlspecialchars($bookname) . '</title>';
 139  
 140      // To store the prev level (book only have 0 and 1)
 141      $prevlevel = null;
 142      $currlevel = 0;
 143      foreach ($chapters as $chapter) {
 144          // Calculate current level ((book only have 0 and 1)
 145          $currlevel = empty($chapter->subchapter) ? 0 : 1;
 146          // Based upon prevlevel and current one, decide what to close
 147          if ($prevlevel !== null) {
 148              // Calculate the number of spaces (for visual xml-text formating)
 149              $prevspaces = substr('                ', 0, $currlevel * 2);
 150  
 151              // Same level, simply close the item
 152              if ($prevlevel == $currlevel) {
 153                  $imsitems .= $prevspaces . '        </item>' . "\n";
 154              }
 155              // Bigger currlevel, nothing to close
 156              // Smaller currlevel, close both the current item and the parent one
 157              if ($prevlevel > $currlevel) {
 158                  $imsitems .= '          </item>' . "\n";
 159                  $imsitems .= '        </item>' . "\n";
 160              }
 161          }
 162          // Update prevlevel
 163          $prevlevel = $currlevel;
 164  
 165          // Calculate the number of spaces (for visual xml-text formatting)
 166          $currspaces = substr('                ', 0, $currlevel * 2);
 167  
 168          $chaptertitle = format_string($chapter->title, true, array('context'=>$context));
 169  
 170          // Add the imsitems
 171          $imsitems .= $currspaces .'        <item identifier="ITEM-' . $book->course . '-' . $book->id . '-' . $chapter->pagenum .'" isvisible="true" identifierref="RES-' .
 172                  $book->course . '-' . $book->id . '-' . $chapter->pagenum . "\">\n" .
 173                  $currspaces . '         <title>' . htmlspecialchars($chaptertitle) . '</title>' . "\n";
 174  
 175          // Add the imsresources
 176          // First, check if we have localfiles
 177          $localfiles = array();
 178          foreach ($chapterresources[$chapter->id] as $localfile) {
 179              $localfiles[] = "\n" . '      <file href="' . $localfile . '" />';
 180          }
 181          // Now add the dependency to css
 182          $cssdependency = "\n" . '      <dependency identifierref="RES-' . $book->course . '-'  . $book->id . '-css" />';
 183          // Now build the resources section
 184          $imsresources .= '    <resource identifier="RES-' . $book->course . '-'  . $book->id . '-' . $chapter->pagenum . '" type="webcontent" xml:base="' .
 185                  $chapter->pagenum . '/" href="index.html">' . "\n" .
 186                  '      <file href="' . $chapter->pagenum . '/index.html" />' . implode($localfiles) . $cssdependency . "\n".
 187                  '    </resource>' . "\n";
 188      }
 189  
 190      // Close items (the latest chapter)
 191      // Level 1, close 1
 192      if ($currlevel == 0) {
 193          $imsitems .= '        </item>' . "\n";
 194      }
 195      // Level 2, close 2
 196      if ($currlevel == 1) {
 197          $imsitems .= '          </item>' . "\n";
 198          $imsitems .= '        </item>' . "\n";
 199      }
 200  
 201      // Define the css common resource
 202      $cssresource = '    <resource identifier="RES-' . $book->course . '-'  . $book->id . '-css" type="webcontent" xml:base="css/" href="styles.css">
 203        <file href="css/styles.css" />
 204      </resource>' . "\n";
 205  
 206      // Add imsitems to manifest
 207      $imsmanifest .= "\n" . $imsitems;
 208      // Close the organization
 209      $imsmanifest .= "    </organization>
 210    </organizations>";
 211      // Add resources to manifest
 212      $imsmanifest .= "\n  <resources>\n" . $imsresources . $cssresource . "  </resources>";
 213      // Close manifest
 214      $imsmanifest .= "\n</manifest>\n";
 215  
 216      $manifest_file_record = array('contextid'=>$context->id, 'component'=>'booktool_exportimscp', 'filearea'=>'temp',
 217              'itemid'=>$book->revision, 'filepath'=>"/", 'filename'=>'imsmanifest.xml');
 218      $fs->create_file_from_string($manifest_file_record, $imsmanifest);
 219  }
 220  
 221  /**
 222   * Returns the html contents of one book's chapter to be exported as IMSCP
 223   *
 224   * @param stdClass $chapter the chapter to be exported
 225   * @param context_module $context context the chapter belongs to
 226   * @return string the contents of the chapter
 227   */
 228  function booktool_exportimscp_chapter_content($chapter, $context) {
 229  
 230      $options = new stdClass();
 231      $options->noclean = true;
 232      $options->context = $context;
 233  
 234      // We need to rewrite the pluginfile URLs so the media filters can work.
 235      $chaptercontent = file_rewrite_pluginfile_urls($chapter->content, 'pluginfile.php', $context->id, 'mod_book', 'chapter',
 236                                                      $chapter->id);
 237      $chaptercontent = format_text($chaptercontent, $chapter->contentformat, $options);
 238  
 239      // Now remove again the full pluginfile URLs.
 240      $options = array('reverse' => true);
 241      $chaptercontent = file_rewrite_pluginfile_urls($chaptercontent, 'pluginfile.php', $context->id, 'mod_book', 'chapter',
 242                                                      $chapter->id, $options);
 243      $chaptercontent = str_replace('@@PLUGINFILE@@/', '', $chaptercontent);
 244  
 245      $chaptertitle = format_string($chapter->title, true, array('context'=>$context));
 246  
 247      $content = '';
 248      $content .= '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">' . "\n";
 249      $content .= '<html>' . "\n";
 250      $content .= '<head>' . "\n";
 251      $content .= '<meta http-equiv="content-type" content="text/html; charset=utf-8" />' . "\n";
 252      $content .= '<link rel="stylesheet" type="text/css" href="../css/styles.css" />' . "\n";
 253      $content .= '<title>' . $chaptertitle . '</title>' . "\n";
 254      $content .= '</head>' . "\n";
 255      $content .= '<body>' . "\n";
 256      $content .= '<h1 id="header">' . $chaptertitle . '</h1>' ."\n";
 257      $content .= $chaptercontent . "\n";
 258      $content .= '</body>' . "\n";
 259      $content .= '</html>' . "\n";
 260  
 261      return $content;
 262  }