mod/wiki/diff.php

   1 <?php
   2
   3 // This file is part of Moodle - http://moodle.org/
   4 //
   5 // Moodle is free software: you can redistribute it and/or modify
   6 // it under the terms of the GNU General Public License as published by
   7 // the Free Software Foundation, either version 3 of the License, or
   8 // (at your option) any later version.
   9 //
  10 // Moodle is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13 // GNU General Public License for more details.
  14 //
  15 // You should have received a copy of the GNU General Public License
  16 // along with Moodle. If not, see <http://www.gnu.org/licenses/>.
  17
  18 /**
  19  * This file contains all necessary code to view a diff page
  20  *
  21  * @package mod_wiki
  22  * @copyright 2009 Marc Alier, Jordi Piguillem marc.alier@upc.edu
  23  * @copyright 2009 Universitat Politecnica de Catalunya http://www.upc.edu
  24  *
  25  * @author Jordi Piguillem
  26  * @author Marc Alier
  27  * @author David Jimenez
  28  * @author Josep Arus
  29  * @author Kenneth Riba
  30  *
  31  * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  32  */
  33
  34 require_once('../../config.php');
  35
  36 require_once($CFG->dirroot . '/mod/wiki/lib.php');
  37 require_once($CFG->dirroot . '/mod/wiki/locallib.php');
  38 require_once($CFG->dirroot . '/mod/wiki/pagelib.php');
  39
  40 require_once($CFG->dirroot . '/mod/wiki/diff/difflib.php');
  41 require_once($CFG->dirroot . '/mod/wiki/diff/diff_nwiki.php');
  42
  43 $pageid = required_param('pageid', PARAM_TEXT);
  44 $compare = required_param('compare', PARAM_INT);
  45 $comparewith = required_param('comparewith', PARAM_INT);
  46
  47 if (!$page = wiki_get_page($pageid)) {
  48     print_error('incorrectpageid', 'wiki');
  49 }
  50
  51 if (!$subwiki = wiki_get_subwiki($page->subwikiid)) {
  52     print_error('incorrectsubwikiid', 'wiki');
  53 }
  54
  55 if (!$wiki = wiki_get_wiki($subwiki->wikiid)) {
  56     print_error('incorrectwikiid', 'wiki');
  57 }
  58
  59 if (!$cm = get_coursemodule_from_instance('wiki', $wiki->id)) {
  60     print_error('invalidcoursemodule');
  61 }
  62
  63 $course = $DB->get_record('course', array('id' => $cm->course), '*', MUST_EXIST);
  64
  65 if ($compare >= $comparewith) {
  66     print_error("A page version can only be compared with an older version.");
  67 }
  68
  69 require_login($course, true, $cm);
  70
  71 if (!wiki_user_can_view($subwiki, $wiki)) {
  72     print_error('cannotviewpage', 'wiki');
  73 }
  74
  75 $wikipage = new page_wiki_diff($wiki, $subwiki, $cm);
  76
  77 $wikipage->set_page($page);
  78 $wikipage->set_comparison($compare, $comparewith);
  79
  80 $event = \mod_wiki\event\page_diff_viewed::create(
  81         array(
  82             'context' => context_module::instance($cm->id),
  83             'objectid' => $pageid,
  84             'other' => array(
  85                 'comparewith' => $comparewith,
  86                 'compare' => $compare
  87                 )
  88             ));
  89 $event->add_record_snapshot('wiki_pages', $page);
  90 $event->add_record_snapshot('wiki', $wiki);
  91 $event->add_record_snapshot('wiki_subwikis', $subwiki);
  92 $event->trigger();
  93
  94 $wikipage->print_header();
  95
  96 $wikipage->print_content();
  97
  98 $wikipage->print_footer();