<?php
/* For licensing terms, see /license.txt */
/**
 * @package chamilo.calendar
 */

/**
 * INIT SECTION
 */
use \ChamiloSession as Session;

// name of the language file that needs to be included
$language_file = array('agenda', 'group');

// use anonymous mode when accessing this course tool
$use_anonymous = true;
require_once '../inc/global.inc.php';
$current_course_tool = TOOL_CALENDAR_EVENT;

$course_info = api_get_course_info();

if (!empty($course_info)) {
    api_protect_course_script(true);
}

//session
if (isset($_GET['id_session'])) {
    $_SESSION['id_session'] = intval($_GET['id_session']);
}

$action = isset($_GET['action']) ? $_GET['action'] : null;
$origin = isset($_GET['origin']) ? $_GET['origin'] : null;

$this_section = SECTION_COURSES;

if (empty($action)) {
    $url = api_get_path(WEB_CODE_PATH).'calendar/agenda_js.php?type=course';
    header("Location: $url");
    exit;
}

/* 	Resource linker */
$_SESSION['source_type'] = 'Agenda';
require_once api_get_path(SYS_CODE_PATH).'resourcelinker/resourcelinker.inc.php';

if (!empty($addresources)) {
    // When the "Add Resource" button is clicked we store all the form data into a session
    $form_elements = array(
        'day' => Security::remove_XSS($_POST['fday']),
        'month' => Security::remove_XSS($_POST['fmonth']),
        'year' => Security::remove_XSS($_POST['fyear']),
        'hour' => Security::remove_XSS($_POST['fhour']),
        'minutes' => Security::remove_XSS($_POST['fminute']),
        'end_day' => Security::remove_XSS($_POST['end_fday']),
        'end_month' => Security::remove_XSS($_POST['end_fmonth']),
        'end_year' => Security::remove_XSS($_POST['end_fyear']),
        'end_hours' => Security::remove_XSS($_POST['end_fhour']),
        'end_minutes' => Security::remove_XSS($_POST['end_fminute']),
        'title' => Security::remove_XSS(stripslashes($_POST['title'])),
        'content' => Security::remove_XSS(stripslashes($_POST['content'])),
        'id' => Security::remove_XSS($_POST['id']),
        'action' => Security::remove_XSS($_POST['action']),
        'to' => Security::remove_XSS($_POST['selectedform'])
    );
    $_SESSION['formelements'] = $form_elements;
    // this is to correctly handle edits
    if ($id) {
        $action = "edit";
    }
    //print_r($form_elements);
    header(
        'Location: '.api_get_path(
            WEB_CODE_PATH
        )."resourcelinker/resourcelinker.php?source_id=1&action=$action&id=$id&originalresource=no"
    );
    exit;
}

if (!empty($_GET['view'])) {
    $_SESSION['view'] = Security::remove_XSS($_GET['view']);
}

// Functions for the agenda tool
require_once 'agenda.inc.php';
/*
  TREATING THE PARAMETERS
  1. viewing month only or everything
  2. sort ascending or descending
  3. showing or hiding the send-to-specific-groups-or-users form
  4. filter user or group
 */


// 3. showing or hiding the send-to-specific-groups-or-users form
$setting_allow_individual_calendar = true;
if (empty($_POST['To']) and empty($_SESSION['allow_individual_calendar'])) {
    $_SESSION['allow_individual_calendar'] = "hide";
}
$allow_individual_calendar_status = $_SESSION['allow_individual_calendar'];
if (!empty($_POST['To']) and ($allow_individual_calendar_status == "hide")) {
    $_SESSION['allow_individual_calendar'] = "show";
}
if (!empty($_GET['sort']) and ($allow_individual_calendar_status == "show")) {
    $_SESSION['allow_individual_calendar'] = "hide";
}

// 4. filter user or group
if (!empty($_GET['user']) or !empty($_GET['group'])) {
    $_SESSION['user'] = (int)$_GET['user'];
    $_SESSION['group'] = (int)$_GET['group'];
}
if ((!empty($_GET['user']) and $_GET['user'] == "none") or (!empty($_GET['group']) and $_GET['group'] == "none")) {
    Session::erase("user");
    Session::erase("group");
}

$group_id = api_get_group_id();

//It comes from the group tools. If it's define it overwrites $_SESSION['group']

$htmlHeadXtra[] = to_javascript();
$htmlHeadXtra[] = user_group_filter_javascript();

// this loads the javascript that is needed for the date popup selection
$htmlHeadXtra[] = '<script src="'.api_get_path(WEB_LIBRARY_PATH).'javascript/calendar/tbl_change.js" type="text/javascript" ></script>';

// setting the name of the tool
$nameTools = get_lang('Agenda'); // language variable in trad4all.inc.php
// showing the header if we are not in the learning path, if we are in
// the learning path, we do not include the banner so we have to explicitly
// include the stylesheet, which is normally done in the header
if (!empty($group_id)) {
    $group_properties = GroupManager :: get_group_properties($group_id);
    $interbreadcrumb[] = array("url" => "../group/group.php", "name" => get_lang('Groups'));
    $interbreadcrumb[] = array(
        "url" => "../group/group_space.php?gidReq=".$group_id,
        "name" => get_lang('GroupSpace').' '.$group_properties['name']
    );
    Display::display_header($nameTools, 'Agenda');
} elseif (empty($origin) or $origin != 'learnpath') {
    Display::display_header($nameTools, 'Agenda');
} else {
    echo "<link rel=\"stylesheet\" type=\"text/css\" href=\"".api_get_path(WEB_CODE_PATH)."css/default.css\"/>";
}

/*
  TRACKING
 */
event_access_tool(TOOL_CALENDAR_EVENT);

/*   			SETTING SOME VARIABLES
 */
// Variable definitions
// Defining the shorts for the days. We use camelcase because these are arrays of language variables
$DaysShort = api_get_week_days_short();
// Defining the days of the week to allow translation of the days. We use camelcase because these are arrays of language variables
$DaysLong = api_get_week_days_long();
// Defining the months of the year to allow translation of the months. We use camelcase because these are arrays of language variables
$MonthsLong = api_get_months_long();

// Database table definitions
$TABLEAGENDA = Database::get_course_table(TABLE_AGENDA);
$TABLE_ITEM_PROPERTY = Database::get_course_table(TABLE_ITEM_PROPERTY);
$tbl_user = Database::get_main_table(TABLE_MAIN_USER);
$tbl_courseUser = Database::get_main_table(TABLE_MAIN_COURSE_USER);
$tbl_group = Database::get_course_table(TABLE_GROUP);
$tbl_groupUser = Database::get_course_table(TABLE_GROUP_USER);

/*   			ACCESS RIGHTS */
// permission stuff - also used by loading from global in agenda.inc.php
$is_allowed_to_edit = api_is_allowed_to_edit(false, true) OR (api_get_course_setting(
    'allow_user_edit_agenda'
) && !api_is_anonymous());

// Tool introduction
Display::display_introduction_section(TOOL_CALENDAR_EVENT);

/* 		MAIN SECTION	 */

//setting the default year and month
$select_year = '';
$select_month = '';
$select_day = '';

if (!empty($_GET['year'])) {
    $select_year = (int)$_GET['year'];
}
if (!empty($_GET['month'])) {
    $select_month = (int)$_GET['month'];
}
if (!empty($_GET['day'])) {
    $select_day = (int)$_GET['day'];
}

$today = getdate();

if (empty($select_year)) {
    $select_year = $today['year'];
}
if (empty($select_month)) {
    $select_month = $today['mon'];
}

echo '<div class="actions">';

if (api_is_allowed_to_edit(false, true) OR
    (api_get_course_setting('allow_user_edit_agenda') && !api_is_anonymous()) && api_is_allowed_to_session_edit(
        false,
        true
    ) OR
    GroupManager::user_has_access(
        api_get_user_id(),
        $group_id,
        GroupManager::GROUP_TOOL_CALENDAR
    ) && GroupManager::is_tutor_of_group(api_get_user_id(), $group_id)
) {
    echo display_courseadmin_links();
}

echo '</div>';

$event_id = isset($_REQUEST['id']) ? $_REQUEST['id'] : null;
$type = $event_type = isset($_GET['type']) ? $_GET['type'] : null;

if ($type == 'fromjs') {
    $id_list = explode('_', $event_id);
    $event_id = $id_list[1];
    $event_type = $id_list[0];
}

if (!api_is_allowed_to_edit(null, true) && $event_type == 'course') {
    api_not_allowed();
}

$course_info = api_get_course_info();

if (api_is_allowed_to_edit(false, true) OR
    (api_get_course_setting('allow_user_edit_agenda') && !api_is_anonymous() && api_is_allowed_to_session_edit(
        false,
        true
    )) OR
    GroupManager::user_has_access(
        api_get_user_id(),
        $group_id,
        GroupManager::GROUP_TOOL_CALENDAR
    ) && GroupManager::is_tutor_of_group(api_get_user_id(), $group_id)
) {
    switch ($action) {
        case 'add':
            if (isset($_POST['submit_event']) && $_POST['submit_event']) {
                $event_start = (int)$_POST['fyear'].'-'.(int)$_POST['fmonth'].'-'.(int)$_POST['fday'].' '.(int)$_POST['fhour'].':'.(int)$_POST['fminute'].':00';
                $event_stop = (int)$_POST['end_fyear'].'-'.(int)$_POST['end_fmonth'].'-'.(int)$_POST['end_fday'].' '.(int)$_POST['end_fhour'].':'.(int)$_POST['end_fminute'].':00';
                $safe_title = Security::remove_XSS($_POST['title']);
                $safe_file_comment = Security::remove_XSS($_POST['file_comment']);

                if ($_POST['empty_end_date'] == 'on') {
                    $event_stop = '0000-00-00 00:00:00';
                }
                $id = agenda_add_item(
                    $course_info,
                    $safe_title,
                    $_POST['content'],
                    $event_start,
                    $event_stop,
                    $_POST['selected_form'],
                    false,
                    $safe_file_comment
                );
                if (!empty($_POST['repeat'])) {
                    $end_y = intval($_POST['repeat_end_year']);
                    $end_m = intval($_POST['repeat_end_month']);
                    $end_d = intval($_POST['repeat_end_day']);
                    $end = mktime(23, 59, 59, $end_m, $end_d, $end_y);
                    $res = agenda_add_repeat_item(
                        $course_info,
                        $id,
                        $_POST['repeat_type'],
                        $end,
                        $_POST['selected_form'],
                        $safe_file_comment
                    );
                }
                Display::display_confirmation_message(get_lang('AddSuccess'));
            } else {
                show_add_form();
            }
            break;
        case "announce":
            //copying the agenda item into an announcement
            if (!(api_is_course_coach() && !api_is_element_in_the_session(TOOL_AGENDA, $event_id))) {
                // a coach can only delete an element belonging to his session
                $ann_id = store_agenda_item_as_announcement($event_id);
                $tool_group_link = (isset($_SESSION['toolgroup']) ? '&toolgroup='.$_SESSION['toolgroup'] : '');
                Display::display_normal_message(
                    get_lang(
                        'CopiedAsAnnouncement'
                    ).'&nbsp;<a href="../announcements/announcements.php?id='.$ann_id.$tool_group_link.'">'.get_lang(
                        'NewAnnouncement'
                    ).'</a>',
                    false
                );
            }
            break;
        case 'importical':
            if (isset($_POST['ical_submit'])) {
                $ical_name = $_FILES['ical_import']['name'];
                $ical_type = $_FILES['ical_import']['type'];

                $ext = substr($ical_name, (strrpos($ical_name, ".") + 1));

                //$ical_type === 'text/calendar'
                if ($ext === 'ics' || $ext === 'ical' || $ext === 'icalendar' || $ext === 'ifb') {
                    $agenda_result = agenda_import_ical($course_info, $_FILES['ical_import']);
                    $is_ical = true;
                } else {
                    $is_ical = false;
                }

                if (!$is_ical) {
                    Display::display_error_message(get_lang('IsNotiCalFormatFile'));
                    display_ical_import_form();
                    break;
                } else {
                    Display::display_confirmation_message(get_lang('AddSuccess'));
                    echo $agenda_result;
                }
            } else {
                display_ical_import_form();
            }
            break;
        case 'edit':
            // a coach can only delete an element belonging to his session
            if ($_POST['submit_event']) {
                store_edited_agenda_item($event_id, $_REQUEST['id_attach'], $_REQUEST['file_comment']);
                $action = 'view';
            } else {
                show_add_form($event_id, $event_type);
            }
            break;
        case "delete":
            if (!(api_is_course_coach() && !api_is_element_in_the_session(TOOL_AGENDA, $event_id))) {
                // a coach can only delete an element belonging to his session
                delete_agenda_item($event_id);
                $action = 'view';
            }
            break;
        case "showhide":
            if (!(api_is_course_coach() && !api_is_element_in_the_session(TOOL_AGENDA, $event_id))) {
                // a coach can only delete an element belonging to his session
                showhide_agenda_item($event_id);
                $action = 'view';
            }
            if (!empty($_GET['agenda_id'])) {
                display_one_agenda_item($_GET['agenda_id']);
            }
            break;
        case "delete_attach": //delete attachment file
            $id_attach = $_GET['id_attach'];
            if (!empty($id_attach)) {
                delete_attachment_file($id_attach);
                $action = 'view';
            }
            break;
    }
}

// The footer is displayed only if we are not in the learnpath
if ($origin != 'learnpath') {
    Display::display_footer();
}