<?php
/* For licensing terms, see /license.txt */

/**
 *	@package chamilo.survey
 * 	@author unknown, the initial survey that did not make it in 1.8 because of bad code
 * 	@author Patrick Cool <patrick.cool@UGent.be>, Ghent University: cleanup, refactoring and rewriting large parts of the code
 *	@author Julio Montoya Armas <gugli100@gmail.com>, Chamilo: Personality Test modification and rewriting large parts of the code
 * 	@version $Id: survey_list.php 21933 2009-07-09 06:08:22Z ivantcholakov $
 *
 * 	@todo use quickforms for the forms
 */

// Language file that needs to be included
$language_file = 'survey';

if (!isset($_GET['cidReq'])) {
    $_GET['cidReq'] = 'none'; // Prevent sql errors
    $cidReset = true;
}

// Including the global initialization file
require_once '../inc/global.inc.php';
$this_section = SECTION_COURSES;
$current_course_tool = TOOL_SURVEY;

api_protect_course_script(true);
$action = isset($_GET['action']) ? Security::remove_XSS($_GET['action']) : null;

// Including additional libraries
require_once 'survey.lib.php';

// Tracking
event_access_tool(TOOL_SURVEY);

/** @todo
 * This has to be moved to a more appropriate place (after the display_header
 * of the code)
 */

$courseInfo = api_get_course_info();
$isDrhOfCourse = CourseManager::isUserSubscribedInCourseAsDrh(
    api_get_user_id(),
    $courseInfo
);

if ($isDrhOfCourse) {
    Display::display_header(get_lang('SurveyList'));
    SurveyUtil::displaySurveyListForDrh();
    Display::display_footer();
    exit;
}

if (!api_is_allowed_to_edit(false, true)) {
    // Coach can see this
    Display::display_header(get_lang('SurveyList'));
    SurveyUtil::survey_list_user(api_get_user_id());
    Display::display_footer();
    exit;
}

$extend_rights_for_coachs = api_get_setting('extend_rights_for_coach_on_survey');

// Database table definitions
$table_survey = Database:: get_course_table(TABLE_SURVEY);
$table_survey_question = Database:: get_course_table(TABLE_SURVEY_QUESTION);
$table_course = Database:: get_main_table(TABLE_MAIN_COURSE);
$table_user = Database:: get_main_table(TABLE_MAIN_USER);

// Language variables
if (isset($_GET['search']) && $_GET['search'] == 'advanced') {
    $interbreadcrumb[] = array('url' => api_get_path(WEB_CODE_PATH).'survey/survey_list.php', 'name' => get_lang('SurveyList'));
    $tool_name = get_lang('SearchASurvey');
} else {
    $tool_name = get_lang('SurveyList');
}

if ($action == 'copy_survey') {
    if (api_is_allowed_to_edit()) {
        survey_manager::copy_survey($_GET['survey_id']);
        $message = get_lang('Copied');
        header('Location: ' . api_get_path(WEB_CODE_PATH) . 'survey/survey_list.php?' . api_get_cidreq());
        exit;
    }
}

// Header
Display::display_header($tool_name, 'Survey');

// Tool introduction
Display::display_introduction_section('survey', 'left');

// Action handling: searching
if (isset($_GET['search']) && $_GET['search'] == 'advanced') {
    SurveyUtil::display_survey_search_form();
}
// Action handling: deleting a survey
if ($action == 'delete' && isset($_GET['survey_id'])) {
    // Getting the information of the survey (used for when the survey is shared)
    $survey_data = survey_manager::get_survey($_GET['survey_id']);
    if (api_is_course_coach() && intval($_SESSION['id_session']) != $survey_data['session_id']) {
        // The coach can't delete a survey not belonging to his session
        api_not_allowed();
        exit;
    }
    // If the survey is shared => also delete the shared content
    if (is_numeric($survey_data['survey_share'])) {
        survey_manager::delete_survey($survey_data['survey_share'], true);
    }

    $return = survey_manager::delete_survey($_GET['survey_id']);

    if ($return) {
        Display::display_confirmation_message(get_lang('SurveyDeleted'), false);
    } else {
        Display::display_error_message(get_lang('ErrorOccurred'), false);
    }
}

if ($action == 'empty') {
    $mysession = api_get_session_id();
    if ($mysession != 0) {
        if (!((api_is_course_coach() || api_is_platform_admin()) &&
            api_is_element_in_the_session(TOOL_SURVEY, $_GET['survey_id']))) {
            // The coach can't empty a survey not belonging to his session
            api_not_allowed();
            exit;
        }
    } else {
        if (!(api_is_course_admin() || api_is_platform_admin())) {
            api_not_allowed();
            exit;
        }
    }
    $return = survey_manager::empty_survey(intval($_GET['survey_id']));
    if ($return) {
        Display :: display_confirmation_message(get_lang('SurveyEmptied'), false);
    } else {
        Display :: display_error_message(get_lang('ErrorOccurred'), false);
    }
}

// Action handling: performing the same action on multiple surveys
if (isset($_POST['action']) && $_POST['action']) {
    if (is_array($_POST['id'])) {
        foreach ($_POST['id'] as $key => & $value) {
            // getting the information of the survey (used for when the survey is shared)
            $survey_data = survey_manager::get_survey($value);
            // if the survey is shared => also delete the shared content
            if (is_numeric($survey_data['survey_share'])) {
                survey_manager::delete_survey($survey_data['survey_share'], true);
            }
            // delete the actual survey
            survey_manager::delete_survey($value);
        }
        Display :: display_confirmation_message(get_lang('SurveysDeleted'), false);
    } else {
        Display :: display_error_message(get_lang('NoSurveysSelected'), false);
    }
}

echo '<div class="actions">';
if (!api_is_course_coach() || $extend_rights_for_coachs == 'true') {
    // Action links
    echo '<a href="'.api_get_path(WEB_CODE_PATH).'survey/create_new_survey.php?'.api_get_cidreq().'&amp;action=add">'.
        Display::return_icon('new_survey.png', get_lang('CreateNewSurvey'),'',ICON_SIZE_MEDIUM).'</a> ';
}
echo '<a href="'.api_get_self().'?'.api_get_cidreq().'&amp;search=advanced">'.
    Display::return_icon('search.png', get_lang('Search'),'',ICON_SIZE_MEDIUM).'</a>';
echo '</div>';

// Load main content
if (api_is_course_coach() && $extend_rights_for_coachs == 'false') {
    SurveyUtil::display_survey_list_for_coach();
} else {
    SurveyUtil::display_survey_list();
}

// Footer
Display :: display_footer();

/* Bypass functions to make direct use from SortableTable possible */

function get_number_of_surveys()
{
    return SurveyUtil::get_number_of_surveys();
}

function get_survey_data($from, $number_of_items, $column, $direction)
{
    return SurveyUtil::get_survey_data($from, $number_of_items, $column, $direction);
}

function modify_filter($survey_id)
{
    return SurveyUtil::modify_filter($survey_id);
}

function modify_filter_drh($survey_id)
{
    return SurveyUtil::modify_filter($survey_id, true);
}

function get_number_of_surveys_for_coach()
{
    return SurveyUtil::get_number_of_surveys_for_coach();
}
function get_survey_data_for_coach($from, $number_of_items, $column, $direction)
{
    return SurveyUtil::get_survey_data_for_coach($from, $number_of_items, $column, $direction);
}

function modify_filter_for_coach($survey_id)
{
    return SurveyUtil::modify_filter_for_coach($survey_id);
}

function anonymous_filter($anonymous)
{
    return SurveyUtil::anonymous_filter($anonymous);
}

function get_survey_data_drh($from, $number_of_items, $column, $direction)
{
    return SurveyUtil::get_survey_data($from, $number_of_items, $column, $direction, true);
}