/**
 *
 * (c) Copyright Ascensio System SIA 2021
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

var fileUtility = {};

// get file name from the given url
fileUtility.getFileName = function (url, withoutExtension) {
    if (!url) return "";

    var parts = url.split("/");
    var fileName = parts.pop();  // get the file name from the last part of the url
    fileName = fileName.split("?")[0];

    // get file name without extension
    if (withoutExtension) {
        return fileName.substring(0, fileName.lastIndexOf("."));
    }

    return fileName;
};

// get file extension from the given url
fileUtility.getFileExtension = function (url, withoutDot) {
    if (!url) return null;

    var fileName = fileUtility.getFileName(url);  // get file name from the given url

    var parts = fileName.toLowerCase().split(".");

    return withoutDot ? parts.pop() : "." + parts.pop();  // get the extension from the file name with or without dot
};

// get file type from the given url
fileUtility.getFileType = function (url) {
    var ext = fileUtility.getFileExtension(url);  // get the file extension from the given url

    if (fileUtility.documentExts.indexOf(ext) != -1) return fileUtility.fileType.word;  // word type for document extensions
    if (fileUtility.spreadsheetExts.indexOf(ext) != -1) return fileUtility.fileType.cell;  // cell type for spreadsheet extensions
    if (fileUtility.presentationExts.indexOf(ext) != -1) return fileUtility.fileType.slide;  // slide type for presentation extensions

    return fileUtility.fileType.word;  // the default file type is word
}

fileUtility.fileType = {
    word: "word",
    cell: "cell",
    slide: "slide"
}

// the document extension list
fileUtility.documentExts = [".doc", ".docx", ".docm", ".dot", ".dotx", ".dotm", ".odt", ".fodt", ".ott", ".rtf", ".txt", ".html", ".htm", ".mht", ".xml", ".pdf", ".djvu", ".fb2", ".epub", ".xps", ".oxps"];

// the spreadsheet extension list
fileUtility.spreadsheetExts = [".xls", ".xlsx", ".xlsm", ".xlt", ".xltx", ".xltm", ".ods", ".fods", ".ots", ".csv"];

// the presentation extension list
fileUtility.presentationExts = [".pps", ".ppsx", ".ppsm", ".ppt", ".pptx", ".pptm", ".pot", ".potx", ".potm", ".odp", ".fodp", ".otp"];

// get url parameters
function getUrlParams(url) {
    try {
        var query = url.split("?").pop();  // take all the parameters which are placed after ? sign in the file url
        var params = query.split("&");  // parameters are separated by & sign
        var map = {};  // write parameters and their values to the map dictionary
        for (var i = 0; i < params.length; i++) {
            var parts = param.split("=");
            map[parts[0]] = parts[1];
        }
        return map;
    }
    catch (ex) {
        return null;
    }
}

// save all the functions to the fileUtility module to export it later in other files
module.exports = fileUtility;