forked from zhurui/management
129 lines
3.0 KiB
JavaScript
129 lines
3.0 KiB
JavaScript
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/*!
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* fragment-cache <https://github.com/jonschlinkert/fragment-cache>
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*
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* Copyright (c) 2016-2017, Jon Schlinkert.
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* Released under the MIT License.
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*/
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'use strict';
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var MapCache = require('map-cache');
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/**
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* Create a new `FragmentCache` with an optional object to use for `caches`.
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*
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* ```js
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* var fragment = new FragmentCache();
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* ```
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* @name FragmentCache
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* @param {String} `cacheName`
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* @return {Object} Returns the [map-cache][] instance.
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* @api public
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*/
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function FragmentCache(caches) {
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this.caches = caches || {};
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}
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/**
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* Prototype
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*/
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FragmentCache.prototype = {
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/**
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* Get cache `name` from the `fragment.caches` object. Creates a new
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* `MapCache` if it doesn't already exist.
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*
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* ```js
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* var cache = fragment.cache('files');
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* console.log(fragment.caches.hasOwnProperty('files'));
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* //=> true
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* ```
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* @name .cache
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* @param {String} `cacheName`
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* @return {Object} Returns the [map-cache][] instance.
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* @api public
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*/
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cache: function(cacheName) {
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return this.caches[cacheName] || (this.caches[cacheName] = new MapCache());
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},
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/**
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* Set a value for property `key` on cache `name`
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*
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* ```js
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* fragment.set('files', 'somefile.js', new File({path: 'somefile.js'}));
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* ```
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* @name .set
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* @param {String} `name`
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* @param {String} `key` Property name to set
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* @param {any} `val` The value of `key`
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* @return {Object} The cache instance for chaining
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* @api public
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*/
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set: function(cacheName, key, val) {
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var cache = this.cache(cacheName);
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cache.set(key, val);
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return cache;
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},
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/**
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* Returns true if a non-undefined value is set for `key` on fragment cache `name`.
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*
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* ```js
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* var cache = fragment.cache('files');
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* cache.set('somefile.js');
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*
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* console.log(cache.has('somefile.js'));
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* //=> true
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*
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* console.log(cache.has('some-other-file.js'));
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* //=> false
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* ```
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* @name .has
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* @param {String} `name` Cache name
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* @param {String} `key` Optionally specify a property to check for on cache `name`
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* @return {Boolean}
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* @api public
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*/
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has: function(cacheName, key) {
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return typeof this.get(cacheName, key) !== 'undefined';
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},
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/**
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* Get `name`, or if specified, the value of `key`. Invokes the [cache]() method,
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* so that cache `name` will be created it doesn't already exist. If `key` is not passed,
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* the entire cache (`name`) is returned.
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*
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* ```js
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* var Vinyl = require('vinyl');
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* var cache = fragment.cache('files');
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* cache.set('somefile.js', new Vinyl({path: 'somefile.js'}));
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* console.log(cache.get('somefile.js'));
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* //=> <File "somefile.js">
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* ```
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* @name .get
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* @param {String} `name`
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* @return {Object} Returns cache `name`, or the value of `key` if specified
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* @api public
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*/
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get: function(name, key) {
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var cache = this.cache(name);
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if (typeof key === 'string') {
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return cache.get(key);
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}
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return cache;
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}
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};
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/**
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* Expose `FragmentCache`
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*/
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exports = module.exports = FragmentCache;
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