<?php // $Id: login.php 68 2009-07-31 18:23:01Z dlandau $

    require_once("../../config.php");
    require_once($CFG->dirroot."/auth/shibboleth/auth.php");
    
    //initialize variables
    $errormsg = '';

/// Check for timed out sessions
    if (!empty($SESSION->has_timed_out)) {
        $session_has_timed_out = true;
        $SESSION->has_timed_out = false;
    } else {
        $session_has_timed_out = false;
    }


//HTTPS is potentially required in this page
httpsrequired();

/// Define variables used in page
    if (!$site = get_site()) {
        error("No site found!");
    }

    if (empty($CFG->langmenu)) {
        $langmenu = "";
    } else {
        $currlang = current_language();
        $langs    = get_list_of_languages();
        $langlabel = get_accesshide(get_string('language'));
        $langmenu = popup_form ("$CFG->httpswwwroot/login/index.php?lang=", $langs, "chooselang", $currlang, "", "", "", true, 'self', $langlabel);
    }

    $loginsite = get_string("loginsite");

    $loginurl = (!empty($CFG->alternateloginurl)) ? $CFG->alternateloginurl : '';


    if (get_moodle_cookie() == '') {   
        set_moodle_cookie('nobody');   // To help search for cookies
    }

    if (!empty($CFG->registerauth) or is_enabled_auth('none') or !empty($CFG->auth_instructions)) {
        $show_instructions = true;
    } else {
        $show_instructions = false;
    }

    // Set SAML domain cookie
    $config = get_config('auth/shibboleth');
    

    $IdPs = get_idp_list($config->organization_selection);
    if (isset($_POST['idp']) && isset($IdPs[$_POST['idp']])){
        $selectedIdP = $_POST['idp'];
        set_saml_cookie($selectedIdP);
        
        // Redirect to SessionInitiator with providerId as argument
        if (isset($IdPs[$selectedIdP][1]) && !empty($IdPs[$selectedIdP][1])){
            header('Location: '.$IdPs[$selectedIdP][1].'?providerId='. urlencode($selectedIdP) .'&target='. urlencode($CFG->wwwroot.'/auth/shibboleth/index.php'));
        } else {
            // TODO: This has to be changed to /Shibboleth.sso/DS?entityId= for 
            // Shibbolet 2.x sometime...
            header('Location: /Shibboleth.sso?providerId='. urlencode($selectedIdP) .'&target='. urlencode($CFG->wwwroot.'/auth/shibboleth/index.php'));
        }
    } elseif (isset($_POST['idp']) && !isset($IdPs[$_POST['idp']]))  {
        $errormsg = get_string('auth_shibboleth_errormsg', 'auth');
    }

    $loginsite = get_string("loginsite");
    $navlinks = array(array('name' => $loginsite, 'link' => null, 'type' => 'misc'));
    $navigation = build_navigation($navlinks);
    $focus = 'idp';
    print_header("$site->fullname: $loginsite", $site->fullname, $navigation, $focus,
                 '', true, '<div class="langmenu">'.$langmenu.'</div>');

    include("index_form.html");
    print_footer();

?>
