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

/**
 * Responses to AJAX calls for the document upload.
 */
require_once __DIR__.'/../global.inc.php';
require_once api_get_path(SYS_CODE_PATH).'dropbox/dropbox_functions.inc.php';

$action = $_REQUEST['a'];
switch ($action) {
    case 'upload_file':
        api_protect_course_script(true);

        if (isset($_REQUEST['chunkAction']) && 'send' === $_REQUEST['chunkAction']) {
            // It uploads the files in chunks
            if (!empty($_FILES)) {
                $tempDirectory = api_get_path(SYS_ARCHIVE_PATH);
                $files = $_FILES['files'];
                $fileList = [];
                foreach ($files as $name => $array) {
                    $counter = 0;
                    foreach ($array as $data) {
                        $fileList[$counter][$name] = $data;
                        $counter++;
                    }
                }
                if (!empty($fileList)) {
                    foreach ($fileList as $n => $file) {
                        $tmpFile = $tempDirectory.$file['name'];
                        file_put_contents(
                            $tmpFile,
                            fopen($file['tmp_name'], 'r'),
                            FILE_APPEND
                        );
                    }
                }
            }
            echo json_encode([
                'files' => $_FILES,
                'errorStatus' => 0,
            ]);
            exit;
        } else {

            // User access same as upload.php
            $is_allowed_to_edit = api_is_allowed_to_edit(null, true);

            $recipients = isset($_POST['recipients']) ? $_POST['recipients'] : '';
            $id = isset($_GET['id']) ? (int) $_GET['id'] : 0;

            if (empty($recipients) && empty($id)) {
                $resultList[] = ['error' => get_lang('YouMustSelectAtLeastOneDestinee')];
                echo json_encode(['files' => $resultList]);
                exit;
            }
            $work = null;
            if (!empty($id)) {
                $work = new Dropbox_SentWork($id);
                if (empty($work)) {
                    $resultList[] = ['error' => get_lang('Error')];
                    echo json_encode(['files' => $resultList]);
                    exit;
                }
            }

            if (!empty($_FILES)) {
                $files = $_FILES['files'];
                $fileList = [];
                foreach ($files as $name => $array) {
                    $counter = 0;
                    foreach ($array as $data) {
                        $fileList[$counter][$name] = $data;
                        $counter++;
                    }
                }

                $resultList = [];
                foreach ($fileList as $file) {
                    if (isset($_REQUEST['chunkAction']) && 'done' === $_REQUEST['chunkAction']) {
                        // to rename and move the finished file
                        $chunkedFile = api_get_path(SYS_ARCHIVE_PATH).$file['name'];
                        $file['tmp_name'] = $chunkedFile;
                        $file['size'] = filesize($chunkedFile);
                        $file['copy_file'] = true;
                    }

                    $globalFile = [];
                    $globalFile['files'] = $file;
                    /** @var Dropbox_SentWork $result */
                    $result = store_add_dropbox($file, $work);

                    $json = [];
                    if (!empty($result)) {
                        $json['name'] = Display::url(
                            api_htmlentities($result->title),
                            api_htmlentities(api_get_path(WEB_CODE_PATH).'dropbox/index.php?'.api_get_cidreq()),
                            ['target' => '_blank']
                        );

                        $json['url'] = api_get_path(WEB_CODE_PATH).'dropbox/index.php?'.api_get_cidreq();
                        $json['size'] = format_file_size($result->filesize);
                        $json['type'] = api_htmlentities($file['type']);
                        $json['result'] = Display::return_icon(
                            'accept.png',
                            get_lang('Uploaded')
                        );
                    } else {
                        $json['result'] = Display::return_icon(
                            'exclamation.png',
                            get_lang('Error')
                        );
                    }
                    $resultList[] = $json;
                }

                echo json_encode(['files' => $resultList]);
                exit;
            }
        }
        break;
}
exit;