65 lines
3.0 KiB
TypeScript
65 lines
3.0 KiB
TypeScript
// *****************************************************************************
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// Copyright (C) 2018 Ericsson and others.
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//
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// This program and the accompanying materials are made available under the
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// terms of the Eclipse Public License v. 2.0 which is available at
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// http://www.eclipse.org/legal/epl-2.0.
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//
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// This Source Code may also be made available under the following Secondary
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// Licenses when the conditions for such availability set forth in the Eclipse
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// Public License v. 2.0 are satisfied: GNU General Public License, version 2
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// with the GNU Classpath Exception which is available at
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// https://www.gnu.org/software/classpath/license.html.
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//
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// SPDX-License-Identifier: EPL-2.0 OR GPL-2.0-only WITH Classpath-exception-2.0
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// *****************************************************************************
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import { FileStat } from '../common/files';
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import URI from '@theia/core/lib/common/uri';
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export namespace FileSystemUtils {
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export const FILE_NAME_SEPARATOR = ' ';
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/**
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* Generate unique URI for a given parent which does not collide
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*
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* @param parent the `FileStat` of the parent
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* @param targetUri the initial URI
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* @param isDirectory indicates whether the given targetUri represents a directory
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* @param suffix an optional string to append to the file name, in case of collision (e.g. `copy`)
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*/
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export function generateUniqueResourceURI(parent: FileStat, targetUri: URI, isDirectory: boolean, suffix?: string): URI {
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const children = !parent.children ? [] : parent.children!.map(child => child.resource);
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let name = targetUri.path.name;
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let extension = targetUri.path.ext;
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if (!name) {
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// special case for dotfiles (e.g. '.foobar'): use the extension as the name
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name = targetUri.path.ext;
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extension = '';
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}
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// we want the path base for directories with the source path `foo.bar` to be generated as `foo.bar copy` and not `foo copy.bar` as we do for files
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if (isDirectory) {
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name = name + extension;
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extension = '';
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}
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let base = name + extension;
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// test if the name already contains the suffix or the suffix + index, so we don't add it again
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const nameRegex = RegExp(`.*${FileSystemUtils.FILE_NAME_SEPARATOR}${suffix}(${FileSystemUtils.FILE_NAME_SEPARATOR}[0-9]*)?$`);
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if (suffix && !nameRegex.test(name) && children.some(child => child.path.base === base)) {
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name = name + FILE_NAME_SEPARATOR + suffix;
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base = name + extension;
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}
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if (suffix && nameRegex.test(name)) {
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// remove the existing index from the name, so we can generate a new one
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name = name.replace(RegExp(`${FILE_NAME_SEPARATOR}[0-9]*$`), '');
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}
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let index = 0;
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while (children.some(child => child.path.base === base)) {
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index = index + 1;
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base = name + FILE_NAME_SEPARATOR + index + extension;
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}
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return parent.resource.resolve(base);
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}
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}
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