class.ilCalendarBlockGUI.php

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<?php

/* Copyright (c) 1998-2017 ILIAS open source, Extended GPL, see docs/LICENSE */

include_once("Services/Block/classes/class.ilBlockGUI.php");
include_once './Services/Calendar/classes/class.ilCalendarCategories.php';

class ilCalendarBlockGUI extends ilBlockGUI
{
    public $ctrl = null;
    protected $mode;
    protected $display_mode;

    public static $block_type = "cal";
    public static $st_data;

    protected $tabs;

    protected $obj_data_cache;

    protected $parent_gui = "ilcolumngui";

    protected $ui;

    protected $force_month_view = false;

    public function __construct()
    {
        global $DIC;

        parent::__construct();

        $this->tabs = $DIC->tabs();
        $this->obj_data_cache = $DIC["ilObjDataCache"];
        $this->ui = $DIC->ui();

        $lng = $this->lng;
        $ilCtrl = $this->ctrl;
        $tpl = $this->main_tpl;
        $ilUser = $this->user;
        $ilHelp = $DIC["ilHelp"];


        $lng->loadLanguageModule("dateplaner");
        $ilHelp->addHelpSection("cal_block");
        
        include_once("./Services/News/classes/class.ilNewsItem.php");

        $ilCtrl->saveParameter($this, 'bkid');

        $this->setBlockId($ilCtrl->getContextObjId());

        $this->setLimit(5);                     // @todo: needed?
        
        // alex: original detail level 1 did not work anymore
        $this->setAvailableDetailLevels(1);
        $this->setEnableNumInfo(false);

        //if(!isset($_GET["bkid"]))
        //{
        $title = $lng->txt("calendar");
        //}
        //else
        //{
        //      $title = $lng->txt("cal_consultation_hours_for")." ".ilObjUser::_lookupFullname($_GET["bkid"]);
        //}
                
        $this->setTitle($title);
        //$this->setData($data);
        $this->allow_moving = false;
        //$this->handleView();
        
        include_once('Services/Calendar/classes/class.ilDate.php');
        include_once('Services/Calendar/classes/class.ilCalendarUserSettings.php');
        
        $seed_str = "";
        if ((!isset($_GET["seed"]) || $_GET["seed"] == "") &&
            isset($_SESSION["il_cal_block_" . $this->getBlockType() . "_" . $this->getBlockId() . "_seed"])) {
            $seed_str = $_SESSION["il_cal_block_" . $this->getBlockType() . "_" . $this->getBlockId() . "_seed"];
        } elseif (isset($_GET["seed"])) {
            $seed_str =  $_GET["seed"];
        }
            
        if (isset($_GET["seed"]) && $_GET["seed"] != "") {
            $_SESSION["il_cal_block_" . $this->getBlockType() . "_" . $this->getBlockId() . "_seed"]
                = $_GET["seed"];
        }

        if ($seed_str == "") {
            $this->seed = new ilDate(time(), IL_CAL_UNIX);      // @todo: check this
        } else {
            $this->seed = new ilDate($seed_str, IL_CAL_DATE);   // @todo: check this
        }

        $this->settings = ilCalendarSettings::_getInstance();
        $this->user_settings = ilCalendarUserSettings::_getInstanceByUserId($ilUser->getId());
        
        $mode = $ilUser->getPref("il_pd_cal_mode");
        $this->display_mode = $mode ? $mode : "mmon";
    }

    public function getShowWeeksColumn()
    {
        return ($this->settings->getShowWeeks() && $this->user_settings->getShowWeeks());
    }


    public static function getBlockType()
    {
        return self::$block_type;
    }

    public static function isRepositoryObject()
    {
        return false;
    }

    public function setParentGUI($a_val)
    {
        $this->parent_gui = $a_val;
    }

    public function getParentGUI()
    {
        return $this->parent_gui;
    }

    public function setForceMonthView($a_val)
    {
        $this->force_month_view = $a_val;
        if ($a_val) {
            $this->display_mode = "mmon";
        }
    }
    
    public function getForceMonthView()
    {
        return $this->force_month_view;
    }

    public static function getScreenMode()
    {
        global $DIC;

        $ilCtrl = $DIC->ctrl();

        $cmd_class = $ilCtrl->getCmdClass();
        
        if ($cmd_class == "ilcalendarappointmentgui" ||
            $cmd_class == "ilconsultationhoursgui" ||
            $_GET['cmd'] == 'showCalendarSubscription') {
            return IL_SCREEN_CENTER;
        }
        
        switch ($ilCtrl->getCmd()) {
            case "kkk":
            // return IL_SCREEN_CENTER;
            // return IL_SCREEN_FULL;
            
            default:
                //return IL_SCREEN_SIDE;
                break;
        }
    }

    public function executeCommand()
    {
        $ilCtrl = $this->ctrl;
        $ilTabs = $this->tabs;


        $next_class = $ilCtrl->getNextClass();
        $cmd = $ilCtrl->getCmd("getHTML");
        
        $this->setSubTabs();
        
        switch ($next_class) {
            case "ilcalendarappointmentgui":
                include_once('./Services/Calendar/classes/class.ilCalendarAppointmentGUI.php');
                $app_gui = new ilCalendarAppointmentGUI($this->seed, $this->seed);
                $ilCtrl->forwardCommand($app_gui);
                break;
                
            case "ilconsultationhoursgui":
                include_once('./Services/Calendar/classes/ConsultationHours/class.ilConsultationHoursGUI.php');
                $hours = new ilConsultationHoursGUI($this->seed);
                $ilCtrl->forwardCommand($hours);
                break;

            case "ilcalendarappointmentpresentationgui":
                $this->initCategories();
                $presentation = ilCalendarAppointmentPresentationGUI::_getInstance($this->seed, $this->appointment);
                $ilCtrl->forwardCommand($presentation);
                break;

            case "ilcalendarmonthgui":
                $ilTabs->setSubTabActive('app_month');
                include_once('./Services/Calendar/classes/class.ilCalendarMonthGUI.php');
                $month_gui = new ilCalendarMonthGUI($this->seed);
                $ilCtrl->forwardCommand($month_gui);
                break;

            default:
                return $this->$cmd();
        }
    }

    public function setEnableEdit($a_enable_edit = 0)
    {
        $this->enable_edit = $a_enable_edit;
    }

    public function getEnableEdit()
    {
        return $this->enable_edit;
    }
    
    public function fillDataSection()
    {
        // alex: changed from > 1 to > 0 - original detail level 1 did not work anymore
        if ($this->getCurrentDetailLevel() > 0 && $this->display_mode != "mmon") {
            $this->setColSpan(1);
            $this->setRowTemplate("tpl.pd_event_list.html", "Services/Calendar");

            ilBlockGUI::fillDataSection();
        } else {
            // alex: changed from > 1 to > 0 - original detail level 1 did not work anymore
            if ($this->getCurrentDetailLevel() > 0) {
                $tpl = new ilTemplate(
                    "tpl.calendar_block.html",
                    true,
                    true,
                    "Services/Calendar"
                );

                $this->addMiniMonth($tpl);
                $this->setDataSection($tpl->get());
            } else {
                $this->setDataSection($this->getOverview());
            }
        }
    }

    public function getTargetGUIClassPath()
    {
        $target_class = array();
        if (!$this->getRepositoryMode()) {
            $target_class = array("ilpersonaldesktopgui", "ilcalendarpresentationgui");
        } else {
            switch (ilObject::_lookupType((int) $_GET["ref_id"], true)) {
                case "crs":
                    $target_class = array("ilobjcoursegui", "ilcalendarpresentationgui");
                    break;

                case "grp":
                    $target_class = array("ilobjgroupgui", "ilcalendarpresentationgui");
                    break;
            }
        }
        return $target_class;
    }

    public function addMiniMonth($a_tpl)
    {
        $lng = $this->lng;
        $ilCtrl = $this->ctrl;
        $ilUser = $this->user;
        $ui = $this->ui;


        // weekdays
        include_once('Services/Calendar/classes/class.ilCalendarUtil.php');
        if ($this->getShowWeeksColumn()) {
            $a_tpl->setCurrentBlock('month_header_col');
            $a_tpl->setVariable('TXT_WEEKDAY', $lng->txt("cal_week_abbrev"));
            $a_tpl->parseCurrentBlock();
        }
        for ($i = (int) $this->user_settings->getWeekStart();$i < (7 + (int) $this->user_settings->getWeekStart());$i++) {
            $a_tpl->setCurrentBlock('month_header_col');
            $a_tpl->setVariable('TXT_WEEKDAY', ilCalendarUtil::_numericDayToString($i, false));
            $a_tpl->parseCurrentBlock();
        }

        if (isset($_GET["bkid"])) {
            $user_id = $_GET["bkid"];
            $disable_empty = true;
        } else {
            $user_id = $ilUser->getId();
            $disable_empty = false;
        }
        include_once('Services/Calendar/classes/class.ilCalendarSchedule.php');
        $this->scheduler = new ilCalendarSchedule($this->seed, ilCalendarSchedule::TYPE_MONTH, $user_id);
        $this->scheduler->addSubitemCalendars(true);
        $this->scheduler->calculate();
        
        $counter = 0;
        foreach (ilCalendarUtil::_buildMonthDayList(
            $this->seed->get(IL_CAL_FKT_DATE, 'm'),
            $this->seed->get(IL_CAL_FKT_DATE, 'Y'),
            $this->user_settings->getWeekStart()
        )->get() as $date) {
            $counter++;

            $events = $this->scheduler->getByDay($date, $ilUser->getTimeZone());
            $has_events = (bool) count($events);
            if ($has_events || !$disable_empty) {
                $a_tpl->setCurrentBlock('month_col_link');
            } else {
                $a_tpl->setCurrentBlock('month_col_no_link');
            }

            if ($disable_empty) {
                if (!$has_events) {
                    $a_tpl->setVariable('DAY_CLASS', 'calminiinactive');
                } else {
                    $week_has_events = true;
                    include_once 'Services/Booking/classes/class.ilBookingEntry.php';
                    foreach ($events as $event) {
                        $booking = new ilBookingEntry($event['event']->getContextId());
                        if ($booking->hasBooked($event['event']->getEntryId())) {
                            $a_tpl->setVariable('DAY_CLASS', 'calminiapp');
                            break;
                        }
                    }
                }
            } elseif ($has_events) {
                $week_has_events = true;
                $a_tpl->setVariable('DAY_CLASS', 'calminiapp');
            }
            
            
            $day = $date->get(IL_CAL_FKT_DATE, 'j');
            $month = $date->get(IL_CAL_FKT_DATE, 'n');
            
            $month_day = $day;

            $ilCtrl->setParameterByClass(end($this->getTargetGUIClassPath()), 'seed', $date->get(IL_CAL_DATE));
            if ($agenda_view_type = (int) $_GET['cal_agenda_per']) {
                $ilCtrl->setParameterByClass(end($this->getTargetGUIClassPath()), "cal_agenda_per", $agenda_view_type);
            }
            $a_tpl->setVariable('OPEN_DAY_VIEW', $ilCtrl->getLinkTargetByClass($this->getTargetGUIClassPath(), ''));

            $a_tpl->setVariable('MONTH_DAY', $month_day);

            $a_tpl->parseCurrentBlock();


            $a_tpl->setCurrentBlock('month_col');

            include_once('./Services/Calendar/classes/class.ilCalendarUtil.php');
            if (ilCalendarUtil::_isToday($date)) {
                $a_tpl->setVariable('TD_CLASS', 'calminitoday');
            }
            #elseif(ilDateTime::_equals($date,$this->seed,IL_CAL_DAY))
            #{
            #   $a_tpl->setVariable('TD_CLASS','calmininow');
            #}
            elseif (ilDateTime::_equals($date, $this->seed, IL_CAL_MONTH)) {
                $a_tpl->setVariable('TD_CLASS', 'calministd');
            } elseif (ilDateTime::_before($date, $this->seed, IL_CAL_MONTH)) {
                $a_tpl->setVariable('TD_CLASS', 'calminiprev');
            } else {
                $a_tpl->setVariable('TD_CLASS', 'calmininext');
            }
            
            $a_tpl->parseCurrentBlock();

            
            if ($counter and !($counter % 7)) {
                if ($this->getShowWeeksColumn()) {
                    $a_tpl->setCurrentBlock('week');
                    $a_tpl->setVariable(
                        'WEEK',
                        $date->get(IL_CAL_FKT_DATE, 'W')
                    );
                    $a_tpl->parseCurrentBlock();
                }

                $a_tpl->setCurrentBlock('month_row');
                //$a_tpl->setVariable('TD_CLASS','calminiweek');
                $a_tpl->parseCurrentBlock();

                $week_has_events = false;
            }
        }
        $a_tpl->setCurrentBlock('mini_month');
        $a_tpl->setVariable('TXT_MONTH_OVERVIEW', $lng->txt("cal_month_overview"));

        $myseed = clone($this->seed);

        $myseed->increment(ilDateTime::MONTH, -1);
        $ilCtrl->setParameter($this, 'seed', $myseed->get(IL_CAL_DATE));
        
        $prev_link = $ilCtrl->getLinkTarget($this, "setSeed", "", true);

        $myseed->increment(ilDateTime::MONTH, 2);
        $ilCtrl->setParameter($this, 'seed', $myseed->get(IL_CAL_DATE));
        $next_link = $ilCtrl->getLinkTarget($this, "setSeed", "", true);

        $ilCtrl->setParameter($this, 'seed', "");

        $blockgui = $this;

        // view control
        // ... previous button
        $b1 = $ui->factory()->button()->standard($lng->txt("previous"), "#")->withOnLoadCode(function ($id) use ($prev_link, $blockgui) {
            return
                "$('#" . $id . "').click(function() { ilBlockJSHandler('block_" . $blockgui->getBlockType() .
                "_" . $blockgui->getBlockId() . "','" . $prev_link . "'); return false;});";
        });

        // ... month button
        $ilCtrl->clearParameterByClass("ilcalendarblockgui", 'seed');
        $month_link = $ilCtrl->getLinkTarget($this, "setSeed", "", true, false);
        $seed_parts = explode("-", $this->seed->get(IL_CAL_DATE));
        $b2 = $ui->factory()->button()->month($seed_parts[1] . "-" . $seed_parts[0])->withOnLoadCode(function ($id) use ($month_link, $blockgui) {
            return "$('#" . $id . "').on('il.ui.button.month.changed', function(el, id, month) { var m = month.split('-'); ilBlockJSHandler('block_" . $blockgui->getBlockType() .
                "_" . $blockgui->getBlockId() . "','" . $month_link . "' + '&seed=' + m[1] + '-' + m[0] + '-01'); return false;});";
        });
        // ... next button
        $b3 = $ui->factory()->button()->standard($lng->txt("next"), "#")->withOnLoadCode(function ($id) use ($next_link, $blockgui) {
            return
                "$('#" . $id . "').click(function() { ilBlockJSHandler('block_" . $blockgui->getBlockType() .
                "_" . $blockgui->getBlockId() . "','" . $next_link . "'); return false;});";
        });


        $vc = $ui->factory()->viewControl()->section($b1, $b2, $b3);
        $a_tpl->setVariable("VIEW_CTRL_SECTION", $ui->renderer()->render($vc));

        $a_tpl->parseCurrentBlock();
    }

    public function getHTML()
    {
        $this->initCategories();
        $lng = $this->lng;
        $ilCtrl = $this->ctrl;
        $ilAccess = $this->access;
        $ilObjDataCache = $this->obj_data_cache;
        $user = $this->user;

        if ($this->getCurrentDetailLevel() == 0) {
            return "";
        }
        
        // add edit commands
        #if ($this->getEnableEdit())
        
        //if($this->mode == ilCalendarCategories::MODE_PERSONAL_DESKTOP_ITEMS or
        //      $this->mode == ilCalendarCategories::MODE_PERSONAL_DESKTOP_MEMBERSHIP)
        //{
        /*include_once("./Services/News/classes/class.ilRSSButtonGUI.php");
        $this->addBlockCommand(
            $this->ctrl->getLinkTarget($this,'showCalendarSubscription'),
            $lng->txt('ical_export'),
            "", "", true, false, ilRSSButtonGUI::get(ilRSSButtonGUI::ICON_ICAL)
        );*/

        include_once("./Services/News/classes/class.ilRSSButtonGUI.php");
        $gui_path = $this->getTargetGUIClassPath();
        $gui_path[] = "ilcalendarsubscriptiongui";
        $this->addBlockCommand(
                $this->ctrl->getLinkTargetByClass($gui_path),
                $lng->txt('ical_export'),
                "",
                "",
                true,
                false,
                ilRSSButtonGUI::get(ilRSSButtonGUI::ICON_ICAL)
            );
        //}
        
        
        if ($this->mode == ilCalendarCategories::MODE_REPOSITORY) {
            if (!isset($_GET["bkid"])) {
                /*
                if($ilAccess->checkAccess('edit_event','',(int) $_GET['ref_id']))
                {
                    $ilCtrl->setParameter($this, "add_mode", "block");
                    $this->addBlockCommand(
                        $ilCtrl->getLinkTargetByClass("ilCalendarAppointmentGUI",
                            "add"),
                        $lng->txt("add_appointment"));
                    $ilCtrl->setParameter($this, "add_mode", "");
                }*/

                include_once "Modules/Course/classes/class.ilCourseParticipants.php";
                $obj_id = $ilObjDataCache->lookupObjId((int) $_GET['ref_id']);
                $participants = ilCourseParticipants::_getInstanceByObjId($obj_id);
                $users = array_unique(array_merge($participants->getTutors(), $participants->getAdmins()));
                //$users = $participants->getParticipants();
                include_once 'Services/Booking/classes/class.ilBookingEntry.php';
                $users = ilBookingEntry::lookupBookableUsersForObject($obj_id, $users);
                foreach ($users as $user_id) {
                    if (!isset($_GET["bkid"])) {
                        include_once './Services/Calendar/classes/ConsultationHours/class.ilConsultationHourAppointments.php';
                        $now = new ilDateTime(time(), IL_CAL_UNIX);
                        
                        // default to last booking entry
                        $appointments = ilConsultationHourAppointments::getAppointments($user_id);
                        $next_app = end($appointments);
                        reset($appointments);
                        
                        foreach ($appointments as $entry) {
                            // find next entry
                            if (ilDateTime::_before($entry->getStart(), $now, IL_CAL_DAY)) {
                                continue;
                            }
                            include_once 'Services/Booking/classes/class.ilBookingEntry.php';
                            $booking_entry = new ilBookingEntry($entry->getContextId());
                            if (!in_array($obj_id, $booking_entry->getTargetObjIds())) {
                                continue;
                            }
                            
                            if (!$booking_entry->isAppointmentBookableForUser($entry->getEntryId(), $user->getId())) {
                                continue;
                            }
                            $next_app = $entry;
                            break;
                        }

                        /*
                        $ilCtrl->setParameter($this, "bkid", $user_id);
                        if($next_app)
                        {
                            $ilCtrl->setParameter(
                                $this,
                                'seed',
                                (string) $next_app->getStart()->get(IL_CAL_DATE)
                            );
                        }*/

                        //$ilCtrl->setParameterByClass(end($this->getTargetGUIClassPath()), "bkid", $user_id);

                        $ilCtrl->setParameterByClass(end($this->getTargetGUIClassPath()), "ch_user_id", $user_id);

                        if ($next_app) {
                            // this does not work correctly
                            /*$ilCtrl->setParameterByClass(
                                end($this->getTargetGUIClassPath()),
                                'seed',
                                (string) $next_app->getStart()->get(IL_CAL_DATE)
                            );*/
                        }

                        if (!$this->getForceMonthView()) {
                            $this->cal_footer[] = array(
                                'link' => $ilCtrl->getLinkTargetByClass($this->getTargetGUIClassPath(), 'selectCHCalendarOfUser'),
                                'txt' => str_replace("%1", ilObjUser::_lookupFullname($user_id), $lng->txt("cal_consultation_hours_for_user"))
                            );
                        }
                        $ilCtrl->setParameterByClass(end($this->getTargetGUIClassPath()), "ch_user_id", "");
                        $ilCtrl->setParameterByClass(end($this->getTargetGUIClassPath()), "bkid", $_GET["bkid"]);
                        $ilCtrl->setParameterByClass(end($this->getTargetGUIClassPath()), "seed", $_GET["seed"]);
                    }
                }
                $ilCtrl->setParameter($this, "bkid", "");
                $ilCtrl->setParameter($this, 'seed', '');
            } else {
                $ilCtrl->setParameter($this, "bkid", "");
                $this->addBlockCommand(
                    $ilCtrl->getLinkTarget($this),
                    $lng->txt("back")
                );
                $ilCtrl->setParameter($this, "bkid", (int) $_GET["bkid"]);
            }
        }

        if ($this->getProperty("settings") == true) {
            $this->addBlockCommand(
                $ilCtrl->getLinkTarget($this, "editSettings"),
                $lng->txt("settings")
            );
        }

        $ilCtrl->setParameterByClass($this->getParentGUI(), "seed", isset($_GET["seed"]) ? $_GET["seed"] : "");
        $ret = parent::getHTML();
        $ilCtrl->setParameterByClass($this->getParentGUI(), "seed", "");

        // workaround to include asynch code from ui only one time, see #20853
        if ($ilCtrl->isAsynch()) {
            global $DIC;
            $f = $DIC->ui()->factory()->legacy("");
            $ret.= $DIC->ui()->renderer()->renderAsync($f);
        }

        return $ret;
    }
    
    public function getOverview()
    {
        $lng = $this->lng;
        $ilCtrl = $this->ctrl;


        include_once('./Services/Calendar/classes/class.ilCalendarSchedule.php');
        $schedule = new ilCalendarSchedule($this->seed, ilCalendarSchedule::TYPE_INBOX);
        $events = $schedule->getChangedEvents(true);

        $ilCtrl->setParameterByClass('ilcalendarinboxgui', 'changed', 1);
        $link = '<a href=' . $ilCtrl->getLinkTargetByClass('ilcalendarinboxgui', '') . '>';
        $ilCtrl->setParameterByClass('ilcalendarinboxgui', 'changed', '');
        $text = '<div class="small">' . ((int) count($events)) . " " . $lng->txt("cal_changed_events_header") . "</div>";
        $end_link = '</a>';
        
        return $link . $text . $end_link;
    }

    public function addCloseCommand($a_content_block)
    {
        $lng = $this->lng;
        $ilCtrl = $this->ctrl;

        $a_content_block->addHeaderCommand(
            $ilCtrl->getParentReturn($this),
            $lng->txt("close"),
            true
        );
    }
    
    protected function initCategories()
    {
        $this->mode = ilCalendarCategories::MODE_REPOSITORY;

        $cats = \ilCalendarCategories::_getInstance();
        if ($this->getForceMonthView()) {
            // @todo: why not
        }
        elseif (!$cats->getMode()) {
            $cats->initialize(
                \ilCalendarCategories::MODE_REPOSITORY_CONTAINER_ONLY,
                (int) $_GET['ref_id'],
                true
            );
        }
    }
    
    protected function setSubTabs()
    {
        $ilTabs = $this->tabs;

        $ilTabs->clearSubTabs();
    }

    public function setSeed()
    {
        $ilCtrl = $this->ctrl;

        //$ilUser->writePref("il_pd_bkm_mode", 'flat');
        $_SESSION["il_cal_block_" . $this->getBlockType() . "_" . $this->getBlockId() . "_seed"] =
            $_GET["seed"];
        if ($ilCtrl->isAsynch()) {
            echo $this->getHTML();
            exit;
        } else {
            $this->returnToUpperContext();
        }
    }
    
    public function returnToUpperContext()
    {
        $ilCtrl = $this->ctrl;

        $ilCtrl->returnToParent($this);
    }


    public function showCalendarSubscription()
    {
        return;
        $lng = $this->lng;
        $ilUser = $this->user;

        $tpl = new ilTemplate('tpl.show_calendar_subscription.html', true, true, 'Services/Calendar');
        
        $tpl->setVariable('TXT_TITLE', $lng->txt('cal_subscription_header'));
        $tpl->setVariable('TXT_INFO', $lng->txt('cal_subscription_info'));
        $tpl->setVariable('TXT_CAL_URL', $lng->txt('cal_subscription_url'));
        
        include_once './Services/Calendar/classes/class.ilCalendarAuthenticationToken.php';
        
        switch ($this->mode) {
            case ilCalendarCategories::MODE_PERSONAL_DESKTOP_ITEMS:
            case ilCalendarCategories::MODE_PERSONAL_DESKTOP_MEMBERSHIP:
                $selection = ilCalendarAuthenticationToken::SELECTION_PD;
                $calendar = 0;
                break;
            
            default:
                $selection = ilCalendarAuthenticationToken::SELECTION_CATEGORY;
                // TODO: calendar id
                $calendar = ilObject::_lookupObjId((int) $_GET['ref_id']);
                break;
        }
        if ($hash = ilCalendarAuthenticationToken::lookupAuthToken($ilUser->getId(), $selection, $calendar)) {
        } else {
            $token = new ilCalendarAuthenticationToken($ilUser->getId());
            $token->setSelectionType($selection);
            $token->setCalendar($calendar);
            $hash = $token->add();
        }
        $url = ILIAS_HTTP_PATH . '/calendar.php?client_id=' . CLIENT_ID . '&token=' . $hash;
        
        $tpl->setVariable('VAL_CAL_URL', $url);
        $tpl->setVariable('VAL_CAL_URL_TXT', $url);
        
        include_once("./Services/PersonalDesktop/classes/class.ilPDContentBlockGUI.php");
        $content_block = new ilPDContentBlockGUI();
        $content_block->setContent($tpl->get());
        $content_block->setTitle($lng->txt("calendar"));
        $content_block->addHeaderCommand(
            $this->ctrl->getParentReturn($this),
            $lng->txt("selected_items_back")
        );

        return $content_block->getHTML();
    }
    
    public function fillFooter()
    {
        // begin-patch ch
        foreach ((array) $this->cal_footer as $link_info) {
            $this->tpl->setCurrentBlock('data_section');
            $this->tpl->setVariable(
                'DATA',
                sprintf('<a href="%s">%s</a>', $link_info['link'], $link_info['txt'])
            );
            $this->tpl->parseCurrentBlock();
        }
        // end-patch ch

        $this->setFooterLinks();
        $this->fillFooterLinks();
        $this->tpl->setVariable("FCOLSPAN", $this->getColSpan());
        if ($this->tpl->blockExists("block_footer")) {
            $this->tpl->setCurrentBlock("block_footer");
            $this->tpl->parseCurrentBlock();
        }
    }
    
    public function setFooterLinks()
    {
        $ilCtrl = $this->ctrl;
        $lng = $this->lng;


        // alex: changed from < 2 to < 1 - original detail level 1 did not work anymore
        if ($this->getCurrentDetailLevel() < 1) {
            return;
        }

        if (!$this->getForceMonthView()) {
            $this->addFooterLink(
                $lng->txt("cal_upcoming_events_header"),
                $ilCtrl->getLinkTarget($this, "setPdModeEvents"),
                $ilCtrl->getLinkTarget($this, "setPdModeEvents", "", true),
                "block_" . $this->getBlockType() . "_" . $this->block_id,
                false,
                false,
                ($this->display_mode != 'mmon')
            );

            $this->addFooterLink(
                $lng->txt("app_month"),
                $ilCtrl->getLinkTarget($this, "setPdModeMonth"),
                $ilCtrl->getLinkTarget($this, "setPdModeMonth", "", true),
                "block_" . $this->getBlockType() . "_" . $this->block_id,
                false,
                false,
                ($this->display_mode == 'mmon')
            );

            if ($this->getRepositoryMode()) {
                #23921
                $ilCtrl->setParameterByClass('ilcalendarpresentationgui', 'seed', '');
                $this->addFooterLink(
                    $lng->txt("cal_open_calendar"),
                    $ilCtrl->getLinkTargetByClass($this->getTargetGUIClassPath(), ""),
                    "",
                    "block_" . $this->getBlockType() . "_" . $this->block_id,
                    false,
                    false
                );

                $ilCtrl->setParameter($this, "add_mode", "");
                $this->addFooterLink(
                    $lng->txt("add_appointment"),
                    $ilCtrl->getLinkTargetByClass("ilCalendarAppointmentGUI", "add"),
                    "",
                    "block_" . $this->getBlockType() . "_" . $this->block_id,
                    false,
                    false
                );
                $ilCtrl->setParameter($this, "add_mode", "");
            }
        }
    }
    
    public function setPdModeEvents()
    {
        $ilCtrl = $this->ctrl;
        $ilUser = $this->user;


        $ilUser->writePref("il_pd_cal_mode", "evt");
        $this->display_mode = "evt";
        if ($ilCtrl->isAsynch()) {
            echo $this->getHTML();
            exit;
        } else {
            $ilCtrl->redirectByClass("ilpersonaldesktopgui", "show");
        }
    }
    
    public function setPdModeMonth()
    {
        $ilCtrl = $this->ctrl;
        $ilUser = $this->user;

        $ilUser->writePref("il_pd_cal_mode", "mmon");
        $this->display_mode = "mmon";
        if ($ilCtrl->isAsynch()) {
            echo $this->getHTML();
            exit;
        } else {
            $ilCtrl->redirectByClass("ilpersonaldesktopgui", "show");
        }
    }

    public function getEvents()
    {
        $seed = new ilDate(date('Y-m-d', time()), IL_CAL_DATE);

        include_once('./Services/Calendar/classes/class.ilCalendarSchedule.php');
        $schedule = new ilCalendarSchedule($seed, ilCalendarSchedule::TYPE_PD_UPCOMING);
        $schedule->addSubitemCalendars(true); // #12007
        $schedule->setEventsLimit(20);
        $schedule->calculate();
        $ev = $schedule->getScheduledEvents(); // #13809
        return ($ev);
    }

    public function getData()
    {
        $lng = $this->lng;
        $ui = $this->ui;

        $f = $ui->factory();
                            
        $events = $this->getEvents();
        
        $data = array();
        if (sizeof($events)) {
            foreach ($events as $item) {
                $this->ctrl->setParameter($this, "app_id", $item["event"]->getEntryId());
                $this->ctrl->setParameter($this, 'dt', $item['dstart']);
                $url = $this->ctrl->getLinkTarget($this, "getModalForApp", "", true, false);
                $this->ctrl->setParameter($this, "app_id", $_GET["app_id"]);
                $this->ctrl->setParameter($this, "dt", $_GET["dt"]);
                $modal = $f->modal()->roundtrip('', [])->withAsyncRenderUrl($url);

                $dates = $this->getDatesForItem($item);

                $comps = [$f->button()->shy($item["event"]->getPresentationTitle(), "")->withOnClick($modal->getShowSignal()), $modal];
                $renderer = $ui->renderer();
                $shy = $renderer->render($comps);

                $data[] = array(
                    "date" =>  ilDatePresentation::formatPeriod($dates["start"], $dates["end"]),
                    "title" => $item["event"]->getPresentationTitle(),
                    "url" => "#",
                    "shy_button" => $shy
                    );
            }
            $this->setEnableNumInfo(true);
        } else {
            $data[] = array(
                    "date" => $lng->txt("msg_no_search_result"),
                    "title" => "",
                    "url" => ""
                    );
            
            $this->setEnableNumInfo(false);
        }
        
        return $data;
    }

    public function getDatesForItem($item)
    {
        $start = $item["dstart"];
        $end = $item["dend"];
        if ($item["fullday"]) {
            $start = new ilDate($start, IL_CAL_UNIX);
            $end = new ilDate($end, IL_CAL_UNIX);
        } else {
            $start = new ilDateTime($start, IL_CAL_UNIX);
            $end = new ilDateTime($end, IL_CAL_UNIX);
        }
        return array("start" => $start, "end" => $end);
    }


    public function getModalForApp()
    {
        $this->initCategories();
        $ui = $this->ui;
        $ilCtrl = $this->ctrl;

        $f = $ui->factory();
        $r = $ui->renderer();

        // @todo: this needs optimization
        $events = $this->getEvents();
        foreach ($events as $item) {
            if ($item["event"]->getEntryId() == (int) $_GET["app_id"] && $item['dstart'] == (int) $_GET['dt']) {
                $dates = $this->getDatesForItem($item);

                // content of modal
                include_once("./Services/Calendar/classes/class.ilCalendarAppointmentPresentationGUI.php");
                $next_gui = ilCalendarAppointmentPresentationGUI::_getInstance($this->seed, $item);
                $content = $ilCtrl->getHTML($next_gui);

                $modal = $f->modal()->roundtrip(ilDatePresentation::formatPeriod($dates["start"], $dates["end"]), $f->legacy($content));
                echo $r->renderAsync($modal);
            }
        }
        exit();
    }
}