<?php //$Id$
    //This script is used to configure and execute the backup proccess.

    //Define some globals for all the script

    require_once ("../config.php");
    require_once ("lib.php");
    require_once ("backuplib.php");
    require_once ("$CFG->libdir/blocklib.php");
    require_once ("$CFG->libdir/adminlib.php");

    $id = optional_param( 'id' );       // course id
    $to = optional_param( 'to' ); // id of course to import into afterwards.
    $cancel = optional_param( 'cancel' );
    $launch = optional_param( 'launch' );


    if (!empty($id)) {
        require_login($id);
        if (!has_capability('moodle/site:backup', get_context_instance(CONTEXT_COURSE, $id))) {
            error("You need to be a teacher or admin user to use this page.", "$CFG->wwwroot/login/index.php");
        }
    } else {
        require_login();
        if (!has_capability('moodle/site:backup', get_context_instance(CONTEXT_SYSTEM))) {
            error("You need to be an admin user to use this page.", "$CFG->wwwroot/login/index.php");
        }
    }

    if (!empty($to)) {
        if (!has_capability('moodle/site:backup', get_context_instance(CONTEXT_COURSE, $to))) {
            error("You need to be a teacher or admin user to use this page.", "$CFG->wwwroot/login/index.php");
        }
    }

    //Check site
    if (!$site = get_site()) {
        error("Site not found!");
    }

    //Check necessary functions exists. Thanks to gregb@crowncollege.edu
    backup_required_functions();

    //Check backup_version
    if ($id) {
        $linkto = "backup.php?id=".$id.((!empty($to)) ? '&to='.$to : '');
    } else {
        $linkto = "backup.php";
    }
    upgrade_backup_db($linkto);

    //Get strings
    if (empty($to)) {
        $strcoursebackup = get_string("coursebackup");
    }
    else {
        $strcoursebackup = get_string('importdata');
    }
    $stradministration = get_string("administration");

    //If cancel has been selected, go back to course main page (bug 2817)
    if ($cancel) {
        if ($id) {
            $redirecto = $CFG->wwwroot . '/course/view.php?id=' . $id; //Course page
        } else {
            $redirecto = $CFG->wwwroot.'/';
        }
        redirect ($redirecto, get_string('backupcancelled')); //Site page
        exit;
    }

    //If no course has been selected, show a list of available courses

    $navlinks = array();
    if (!$id) {
        $navlinks[] = array('name' => $stradministration, 'link' => "$CFG->wwwroot/$CFG->admin/index.php", 'type' => 'misc');
        $navlinks[] = array('name' => $strcoursebackup, 'link' => null, 'type' => 'misc');
        $navigation = build_navigation($navlinks);

        print_header("$site->shortname: $strcoursebackup", $site->fullname, $navigation);

        if ($courses = get_courses('all','c.shortname','c.id,c.shortname,c.fullname')) {
            print_heading(get_string("choosecourse"));
            print_simple_box_start("center");
            foreach ($courses as $course) {
                echo '<a href="backup.php?id='.$course->id.'">'.format_string($course->fullname).' ('.format_string($course->shortname).')</a><br />'."\n";
            }
            print_simple_box_end();
        } else {
            print_heading(get_string("nocoursesyet"));
            print_continue("$CFG->wwwroot/$CFG->admin/index.php");
        }
        print_footer();
        exit;
    }

    //Get and check course
    if (! $course = get_record("course", "id", $id)) {
        error("Course ID was incorrect (can't find it)");
    }

    //Print header
    if (has_capability('moodle/site:backup', get_context_instance(CONTEXT_SYSTEM))) {
        $navlinks[] = array('name' => $stradministration, 'link' => "$CFG->wwwroot/$CFG->admin/index.php", 'type' => 'misc');
        $navlinks[] = array('name' => $strcoursebackup, 'link' => 'backup.php', 'type' => 'misc');
        $navlinks[] = array('name' => "$course->fullname ($course->shortname)", 'link' => null, 'type' => 'misc');
        $navigation = build_navigation($navlinks);

        print_header("$site->shortname: $strcoursebackup", $site->fullname, $navigation);
    } else {
        $navlinks[] = array('name' => $course->fullname, 'link' => "$CFG->wwwroot/course/view.php?id=$course->id", 'type' => 'misc');
        $navlinks[] = array('name' => $strcoursebackup, 'link' => null, 'type' => 'misc');
        $navigation = build_navigation($navlinks);
        print_header("$course->shortname: $strcoursebackup", $course->fullname, $navigation);
    }

    //Print form
    print_heading(format_string("$strcoursebackup: $course->fullname ($course->shortname)"));
    print_simple_box_start("center");

    //Adjust some php variables to the execution of this script
    @ini_set("max_execution_time","3000");
    raise_memory_limit("192M");

    //Call the form, depending the step we are
    if (!$launch or !data_submitted() or !confirm_sesskey()) {
        // if we're at the start, clear the cache of prefs
        if (isset($SESSION->backupprefs[$course->id])) {
            unset($SESSION->backupprefs[$course->id]);
        }
        include_once("backup_form.html");
    } else if ($launch == "check") {
        include_once("backup_check.html");
    } else if ($launch == "execute") {
        include_once("backup_execute.html");
    }
    print_simple_box_end();

    //Print footer
// (Debug029): フッターのコースへのリンクが有効活用されていない箇所のバグを片っ端から潰す (2009/09/19)(2009/09/20)
// (Debug029): ここから修正
//  print_footer();
    print_footer($course);
// (Debug029): ここまで修正
?>
