function transport()

in src/windows/FileProxy.js [407:481]
21 lines of code
6 McCabe index (conditional complexity)

function transport (success, fail, args, ops) { // ["fullPath","parent", "newName"]
    const src = args[0];
    const parent = args[1];
    const name = args[2];

    const srcFS = getFilesystemFromURL(src);
    const dstFS = getFilesystemFromURL(parent);
    const srcPath = pathFromURL(src);
    const dstPath = pathFromURL(parent);
    if (!(srcFS && dstFS && validName(name))) {
        fail(FileError.ENCODING_ERR);
        return;
    }

    const srcWinPath = cordovaPathToNative(sanitize(srcFS.winpath + srcPath));
    const dstWinPath = cordovaPathToNative(sanitize(dstFS.winpath + dstPath));
    const tgtFsPath = sanitize(dstPath + '/' + name);
    const tgtWinPath = cordovaPathToNative(sanitize(dstFS.winpath + dstPath + '/' + name));
    if (srcWinPath === dstWinPath || srcWinPath === tgtWinPath) {
        fail(FileError.INVALID_MODIFICATION_ERR);
        return;
    }

    WinJS.Promise.join({
        src: openPath(srcWinPath),
        dst: openPath(dstWinPath),
        tgt: openPath(tgtWinPath, { getContent: true })
    }).done(
        function (the) {
            if ((!the.dst.folder) || !(the.src.folder || the.src.file)) {
                fail(FileError.NOT_FOUND_ERR);
                return;
            }
            if ((the.src.folder && the.tgt.file) ||
                (the.src.file && the.tgt.folder) ||
                (the.tgt.folder && (the.tgt.files.length || the.tgt.folders.length))) {
                fail(FileError.INVALID_MODIFICATION_ERR);
                return;
            }
            if (the.src.file) {
                ops.fileOp(the.src.file, the.dst.folder, name, Windows.Storage.NameCollisionOption.replaceExisting)
                    .done(
                        function (storageFile) {
                            success(new FileEntry(
                                name,
                                tgtFsPath,
                                dstFS.name,
                                dstFS.makeNativeURL(tgtFsPath)
                            ));
                        },
                        function () {
                            fail(FileError.INVALID_MODIFICATION_ERR);
                        }
                    );
            } else {
                ops.folderOp(the.src.folder, the.dst.folder, name).done(
                    function () {
                        success(new DirectoryEntry(
                            name,
                            tgtFsPath,
                            dstFS.name,
                            dstFS.makeNativeURL(tgtFsPath)
                        ));
                    },
                    function () {
                        fail(FileError.INVALID_MODIFICATION_ERR);
                    }
                );
            }
        },
        function () {
            fail(FileError.INVALID_MODIFICATION_ERR);
        }
    );
}