<?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
 *
 * @todo The question has to be more clearly indicated (same style as when filling the survey)
 */
require_once __DIR__.'/../inc/global.inc.php';

$this_section = SECTION_COURSES;
$survey_id = isset($_GET['survey_id']) ? (int) $_GET['survey_id'] : 0;
$userId = isset($_GET['user_id']) ? $_GET['user_id'] : 0;
$action = isset($_GET['action']) ? $_GET['action'] : 'overview';
$survey_data = SurveyManager::get_survey($survey_id);

if (empty($survey_data)) {
    api_not_allowed(true);
}

if ($survey_data['anonymous'] == 0) {
    $people_filled_full_data = true;
} else {
    $people_filled_full_data = false;
}
$people_filled = SurveyManager::get_people_who_filled_survey(
    $survey_id,
    $people_filled_full_data
);

// Checking the parameters
SurveyUtil::check_parameters($people_filled);

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

/** @todo this has to be moved to a more appropriate place (after the display_header of the code)*/
if (!api_is_allowed_to_edit(false, true) || $isDrhOfCourse) {
    // Show error message if the survey can be seen only by tutors
    if ($survey_data['visible_results'] == SURVEY_VISIBLE_TUTOR) {
        api_not_allowed(true);
    }

    Display::display_header(get_lang('Surveys'));
    SurveyUtil::handle_reporting_actions($survey_data, $people_filled);
    Display::display_footer();
    exit;
}

/**
 * @todo use Export::arrayToCsv($data, $filename = 'export')
 */
$exportReport = isset($_REQUEST['export_report']) ? $_REQUEST['export_report'] : '';
$format = isset($_REQUEST['export_format']) ? $_REQUEST['export_format'] : '';
if (!empty($exportReport) && !empty($format)) {
    switch ($format) {
        case 'xls':
            $filename = 'survey_results_'.$survey_id.'.xlsx';
            SurveyUtil::export_complete_report_xls($survey_data, $filename, $userId);
            exit;
            break;
        case 'csv':
        default:
            $data = SurveyUtil::export_complete_report($survey_data, $userId);
            $filename = 'survey_results_'.$survey_id.'.csv';
            header('Content-type: application/octet-stream');
            header('Content-Type: application/force-download');

            if (preg_match("/MSIE 5.5/", $_SERVER['HTTP_USER_AGENT'])) {
                header('Content-Disposition: filename= '.$filename);
            } else {
                header('Content-Disposition: attachment; filename= '.$filename);
            }
            if (strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE')) {
                header('Pragma: ');
                header('Cache-Control: ');
                header('Cache-Control: public'); // IE cannot download from sessions without a cache
            }
            header('Content-Description: '.$filename);
            header('Content-transfer-encoding: binary');
            echo $data;
            exit;
            break;
    }
}

$urlname = strip_tags(
    api_substr(api_html_entity_decode($survey_data['title'], ENT_QUOTES), 0, 40)
);
if (api_strlen(strip_tags($survey_data['title'])) > 40) {
    $urlname .= '...';
}

// Breadcrumbs
$interbreadcrumb[] = [
    'url' => api_get_path(WEB_CODE_PATH).'survey/survey_list.php?'.api_get_cidreq(),
    'name' => get_lang('Survey list'),
];
$interbreadcrumb[] = [
    'url' => api_get_path(WEB_CODE_PATH).'survey/survey.php?survey_id='.$survey_id.'&'.api_get_cidreq(),
    'name' => $urlname,
];

if ($action == 'overview') {
    $tool_name = get_lang('Reporting');
} else {
    $interbreadcrumb[] = [
        'url' => api_get_path(WEB_CODE_PATH).'survey/reporting.php?survey_id='.$survey_id,
        'name' => get_lang('Reporting'),
    ];
    switch ($action) {
        case 'questionreport':
            $singlePage = isset($_GET['single_page']) ? (int) $_GET['single_page'] : 0;
            $tool_name = $singlePage ? get_lang('Questions\' overall report') : get_lang('Detailed report by question');
            break;
        case 'userreport':
            $tool_name = get_lang('Detailed report by user');
            break;
        case 'comparativereport':
            $tool_name = get_lang('Comparative report');
            break;
        case 'completereport':
            $tool_name = get_lang('Complete report');
            break;
    }
}

// Displaying the header
Display::display_header($tool_name, 'Survey');

// Action handling
SurveyUtil::handle_reporting_actions($survey_data, $people_filled);

// Content
if ($action == 'overview') {
    $html = null;
    $url = api_get_path(WEB_CODE_PATH).'survey/reporting.php?'.api_get_cidreq().'&';

    $html .= '<div class="survey-reports">';
    $html .= '<div class="list-group">';
    $html .= Display::url(
        Display::return_icon(
            'survey_reporting_overall.png',
            get_lang('Questions\' overall report'),
            null,
            ICON_SIZE_MEDIUM
        ).'<h4>'.get_lang('Questions\' overall report').'</h4><p>'.get_lang('Questions\' overall reportDetail').'</p>',
        $url.'action=questionreport&survey_id='.$survey_id.'&single_page=1',
        ['class' => 'list-group-item']
    );

    $html .= Display::url(
        Display::return_icon(
            'survey_reporting_question.png',
            get_lang('Detailed report by question'),
            null,
            ICON_SIZE_MEDIUM
        ).'<h4>'.get_lang('Detailed report by question').'</h4><p>'.get_lang('Detailed report by questionDetail').'</p>',
        $url.'action=questionreport&survey_id='.$survey_id,
        ['class' => 'list-group-item']
    );

    $html .= Display::url(
        Display::return_icon(
            'survey_reporting_user.png',
            get_lang('Detailed report by user'),
            null,
            ICON_SIZE_MEDIUM
        ).'<h4>'.get_lang('Detailed report by user').'</h4><p>'.get_lang('Detailed report by userDetail').'</p>',
        $url.'action=userreport&survey_id='.$survey_id,
        ['class' => 'list-group-item']
    );

    $html .= Display::url(
        Display::return_icon(
            'survey_reporting_comparative.png',
            get_lang('Comparative report'),
            null,
            ICON_SIZE_MEDIUM
        ).'<h4>'.get_lang('Comparative report').'</h4><p>'.get_lang('Comparative reportDetail').'</p>',
        $url.'action=comparativereport&survey_id='.$survey_id,
        ['class' => 'list-group-item']
    );

    $html .= Display::url(
        Display::return_icon(
            'survey_reporting_complete.png',
            get_lang('Complete report'),
            null,
            ICON_SIZE_MEDIUM
        ).'<h4>'.get_lang('Complete report').'</h4><p>'.get_lang('Complete reportDetail').'</p>',
        $url.'action=completereport&survey_id='.$survey_id,
        ['class' => 'list-group-item']
    );

    $html .= '</div>';
    $html .= '</div>';

    echo $html;
}

Display::display_footer();