mirror of
https://github.com/zhigang1992/react-native-firebase.git
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61 lines
1.4 KiB
JavaScript
61 lines
1.4 KiB
JavaScript
/*
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* Copyright (c) 2016-present Invertase Limited & Contributors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this library except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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/**
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* Returns the next parent of the path e.g. /foo/bar/car -> /foo/bar
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*/
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export function pathParent(path) {
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if (path.length === 0) {
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return null;
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}
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const index = path.lastIndexOf('/');
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if (index <= 0) {
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return null;
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}
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return path.slice(0, index);
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}
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/**
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* Joins a parent and a child path
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*/
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export function pathChild(path, childPath) {
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const canonicalChildPath = childPath
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.split('/')
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.filter($ => $.length > 0)
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.join('/');
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if (path.length === 0) {
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return canonicalChildPath;
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}
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return `${path}/${canonicalChildPath}`;
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}
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/**
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* Returns the last component of a path, e.g /foo/bar.jpeg -> bar.jpeg
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*/
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export function pathLastComponent(path) {
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const index = path.lastIndexOf('/', path.length - 2);
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if (index === -1) {
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return path;
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}
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return path.slice(index + 1);
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}
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