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
  42 $pageid = required_param('pageid', PARAM_TEXT);
  43 $compare = required_param('compare', PARAM_INT);
  44 $comparewith = required_param('comparewith', PARAM_INT);
  45
  46 if (!$page = wiki_get_page($pageid)) {
  47     throw new \moodle_exception('incorrectpageid', 'wiki');
  48 }
  49
  50 if (!$subwiki = wiki_get_subwiki($page->subwikiid)) {
  51     throw new \moodle_exception('incorrectsubwikiid', 'wiki');
  52 }
  53
  54 if (!$wiki = wiki_get_wiki($subwiki->wikiid)) {
  55     throw new \moodle_exception('incorrectwikiid', 'wiki');
  56 }
  57
  58 if (!$cm = get_coursemodule_from_instance('wiki', $wiki->id)) {
  59     throw new \moodle_exception('invalidcoursemodule');
  60 }
  61
  62 $course = $DB->get_record('course', array('id' => $cm->course), '*', MUST_EXIST);
  63
  64 if ($compare >= $comparewith) {
  65     throw new \moodle_exception('cannotcomparenewerversion', 'wiki');
  66 }
  67
  68 require_course_login($course, true, $cm);
  69
  70 if (!wiki_user_can_view($subwiki, $wiki)) {
  71     throw new \moodle_exception('cannotviewpage', 'wiki');
  72 }
  73
  74 $wikipage = new page_wiki_diff($wiki, $subwiki, $cm, 'modulepage');
  75
  76 $wikipage->set_page($page);
  77 $wikipage->set_comparison($compare, $comparewith);
  78
  79 $event = \mod_wiki\event\page_diff_viewed::create(
  80         array(
  81             'context' => context_module::instance($cm->id),
  82             'objectid' => $pageid,
  83             'other' => array(
  84                 'comparewith' => $comparewith,
  85                 'compare' => $compare
  86                 )
  87             ));
  88 $event->add_record_snapshot('wiki_pages', $page);
  89 $event->add_record_snapshot('wiki', $wiki);
  90 $event->add_record_snapshot('wiki_subwikis', $subwiki);
  91 $event->trigger();
  92
  93 $wikipage->print_header();
  94
  95 $wikipage->print_content();
  96
  97 $wikipage->print_footer();