DocumentManager::writeContentIntoDocument()

Complexity

Conditions	22
Paths	160

Size

Total Lines	145
Code Lines	83

Duplication

Lines	0
Ratio	0 %

Importance

Changes	4
Bugs	0	Features	0

<?php
    public static function writeContentIntoDocument(
        $_course,
        $path = null,
        $base_work_dir = null,
        $sessionId = null,
        $documentId = null,
        $groupId = 0,
        $file
    ) {
        $TABLE_DOCUMENT = Database::get_course_table(TABLE_DOCUMENT);

        $documentId = (int) $documentId;
        $groupId = (int) $groupId;
        if (empty($groupId)) {
            $groupId = api_get_group_id();
        }

        $sessionId = (int) $sessionId;
        if (empty($sessionId)) {
            $sessionId = api_get_session_id();
        }

        $course_id = $_course['real_id'];

        if (empty($course_id)) {
            return false;
        }

        if (empty($base_work_dir)) {
            return false;
        }

        if (isset($file) && $file['error'] == 4) {
            //no file
            return false;
        }

        if (empty($documentId)) {
            $documentId = self::get_document_id($_course, $path, $sessionId);
            $docInfo = self::get_document_data_by_id(
                $documentId,
                $_course['code'],
                false,
                $sessionId
            );
            $path = $docInfo['path'];
        } else {
            $docInfo = self::get_document_data_by_id(
                $documentId,
                $_course['code'],
                false,
                $sessionId
            );
            if (empty($docInfo)) {
                return false;
            }
            $path = $docInfo['path'];
        }

        if (empty($path) || empty($docInfo) || empty($documentId)) {
            return false;
        }

        $itemInfo = api_get_item_property_info(
            $_course['real_id'],
            TOOL_DOCUMENT,
            $documentId,
            $sessionId,
            $groupId
        );

        if (empty($itemInfo)) {
            return false;
        }

        // Filtering by group.
        if ($itemInfo['to_group_id'] != $groupId) {
            return false;
        }
        $now = new DateTime();
        $now = $now->format('Y_m_d__H_i_s_');

        $document_exists_in_disk = file_exists($base_work_dir.$path);
        $new_path = $path.'_REPLACED_DATE_'.$now.'_ID_'.$documentId;

        $fileMoved = false;
        $file_renamed_from_disk = false;

        $originalMime = self::file_get_mime_type($base_work_dir.$path);
        $newMime = finfo_file(finfo_open(FILEINFO_MIME_TYPE), $file['tmp_name']);
        if ($originalMime != $newMime) {
            Display::addFlash(Display::return_message(get_lang('FileError'), 'warning'));

            return false;
        }

        if ($document_exists_in_disk) {
            // Move old file to xxx_REPLACED_DATE_#date_ID_#id (soft delete)
            if (is_file($base_work_dir.$path) || is_dir($base_work_dir.$path)) {
                if (rename($base_work_dir.$path, $base_work_dir.$new_path)) {
                    $file_renamed_from_disk = true;
                } else {
                    // Couldn't rename - file permissions problem?
                    error_log(
                        __FILE__.' '.__LINE__.': Error renaming '.$base_work_dir.$path.' to '
                        .$base_work_dir.$new_path.'. This is probably due to file permissions',
                        0
                    );
                }
            }

            if (move_uploaded_file($file['tmp_name'], $base_work_dir.$path)) {
                //update file size into db
                $size = filesize($base_work_dir.$path);
                $sql = "UPDATE $TABLE_DOCUMENT
                                SET size = '".$size."'
                                WHERE
                                    c_id = $course_id AND
                                    session_id = $sessionId AND
                                    id = ".$documentId;
                Database::query($sql);
                $fileMoved = true;
            }
        }
        // Checking inconsistency
        if ($fileMoved &&
            $file_renamed_from_disk
        ) {
            return true;
        } else {
            //Something went wrong
            //The file or directory isn't there anymore (on the filesystem)
            // This means it has been removed externally. To prevent a
            // blocking error from happening, we drop the related items from the
            // item_property and the document table.
            error_log(
                __FILE__.' '.__LINE__.': System inconsistency detected. '.
                'The file or directory '.$base_work_dir.$path.
                ' seems to have been removed from the filesystem independently from '.
                'the web platform. To restore consistency, the elements using the same '.
                'path will be removed from the database',
                0
            );

            return false;
        }