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