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