backup/backup.php

   1 <?php //$Id$
   2     //This script is used to configure and execute the backup proccess.
   3
   4     //Define some globals for all the script
   5
   6     require_once ("../config.php");
   7     require_once ("lib.php");
   8     require_once ("backuplib.php");
   9     require_once ("$CFG->libdir/blocklib.php");
  10     require_once ("$CFG->libdir/adminlib.php");
  11
  12     $id = optional_param( 'id' );       // course id
  13     $to = optional_param( 'to' ); // id of course to import into afterwards.
  14     $cancel = optional_param( 'cancel' );
  15     $launch = optional_param( 'launch' );
  16
  17     require_login();
  18
  19     if (!empty($id)) {
  20         if (!has_capability('moodle/site:backup', get_context_instance(CONTEXT_COURSE, $id))) {
  21             error("You need to be a teacher or admin user to use this page.", "$CFG->wwwroot/login/index.php");
  22         }
  23     } else {
  24         if (!has_capability('moodle/site:backup', get_context_instance(CONTEXT_SYSTEM, SITEID))) {
  25             error("You need to be an admin user to use this page.", "$CFG->wwwroot/login/index.php");
  26         }
  27     }
  28
  29     if (!empty($to)) {
  30         if (!has_capability('moodle/site:backup', get_context_instance(CONTEXT_COURSE, $to))) {
  31             error("You need to be a teacher or admin user to use this page.", "$CFG->wwwroot/login/index.php");
  32         }
  33     }
  34
  35     //Check site
  36     if (!$site = get_site()) {
  37         error("Site not found!");
  38     }
  39
  40     //Check necessary functions exists. Thanks to gregb@crowncollege.edu
  41     backup_required_functions();
  42
  43     //Check backup_version
  44     if ($id) {
  45         $linkto = "backup.php?id=".$id.((!empty($to)) ? '&to='.$to : '');
  46     } else {
  47         $linkto = "backup.php";
  48     }
  49     upgrade_backup_db($linkto);
  50
  51     //Get strings
  52     if (empty($to)) {
  53         $strcoursebackup = get_string("coursebackup");
  54     }
  55     else {
  56         $strcoursebackup = get_string('importdata');
  57     }
  58     $stradministration = get_string("administration");
  59
  60     //If cancel has been selected, go back to course main page (bug 2817)
  61     if ($cancel) {
  62         if ($id) {
  63             $redirecto = $CFG->wwwroot . '/course/view.php?id=' . $id; //Course page
  64         } else {
  65             $redirecto = $CFG->wwwroot.'/';
  66         }
  67         redirect ($redirecto, get_string('backupcancelled')); //Site page
  68         exit;
  69     }
  70
  71     //If no course has been selected, show a list of available courses
  72
  73     if (!$id) {
  74         print_header("$site->shortname: $strcoursebackup", $site->fullname,
  75                      "<a href=\"$CFG->wwwroot/$CFG->admin/index.php\">$stradministration</a> -> $strcoursebackup");
  76
  77         if ($courses = get_courses('all','c.shortname','c.id,c.shortname,c.fullname')) {
  78             print_heading(get_string("choosecourse"));
  79             print_simple_box_start("center");
  80             foreach ($courses as $course) {
  81                 echo '<a href="backup.php?id='.$course->id.'">'.s($course->fullname).' ('.s($course->shortname).')</a><br />'."\n";
  82             }
  83             print_simple_box_end();
  84         } else {
  85             print_heading(get_string("nocoursesyet"));
  86             print_continue("$CFG->wwwroot/$CFG->admin/index.php");
  87         }
  88         print_footer();
  89         exit;
  90     }
  91
  92     //Get and check course
  93     if (! $course = get_record("course", "id", $id)) {
  94         error("Course ID was incorrect (can't find it)");
  95     }
  96
  97     //Print header
  98     if (has_capability('moodle/site:backup', get_context_instance(CONTEXT_SYSTEM, SITEID))) {
  99         print_header("$site->shortname: $strcoursebackup", $site->fullname,
 100                      "<a href=\"$CFG->wwwroot/$CFG->admin/index.php\">$stradministration</a> ->
 101                       <a href=\"backup.php\">$strcoursebackup</a> -> $course->fullname ($course->shortname)");
 102     } else {
 103         print_header("$course->shortname: $strcoursebackup", $course->fullname,
 104                      "<a href=\"$CFG->wwwroot/course/view.php?id=$course->id\">$course->shortname</a> ->
 105                      $strcoursebackup");
 106     }
 107
 108     //Print form
 109     print_heading("$strcoursebackup: $course->fullname ($course->shortname)");
 110     print_simple_box_start("center");
 111
 112     //Adjust some php variables to the execution of this script
 113     @ini_set("max_execution_time","3000");
 114     raise_memory_limit("192M");
 115
 116     //Call the form, depending the step we are
 117     if (!$launch) {
 118         // if we're at the start, clear the cache of prefs
 119         if (isset($SESSION->backupprefs[$course->id])) {
 120             unset($SESSION->backupprefs[$course->id]);
 121         }
 122         include_once("backup_form.html");
 123     } else if ($launch == "check") {
 124         include_once("backup_check.html");
 125     } else if ($launch == "execute") {
 126         include_once("backup_execute.html");
 127     }
 128     print_simple_box_end();
 129
 130     //Print footer
 131     print_footer();
 132
 133 ?>