53 lines
1000 B
JavaScript
53 lines
1000 B
JavaScript
function Cache(loader) {
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this.loader = loader;
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this.loaded = {};
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this.loading = {};
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}
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Cache.prototype.get = function(key) {
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return function(f) {
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if(this.loaded[key] != undefined) {
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f(this.loaded[key]);
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} else {
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this.startLoading(key);
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this.loading[key].push(f);
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this.loader(key)(this.store(key));
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}
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}.bind(this);
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};
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Cache.prototype.warmUp = function(key) {
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if(this.loaded[key] == undefined) {
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this.startLoading(key);
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this.loader(key)(this.store(key));
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}
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};
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Cache.prototype.startLoading = function(key) {
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if(this.loading[key] == undefined) {
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this.loading[key] = [];
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}
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};
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Cache.prototype.store = function(key) {
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return function(value) {
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this.loaded[key] = value;
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for(var i = 0; i < this.loading[key].length; i++) {
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this.loading[key][i](value);
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}
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this.loading[key] = null;
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}.bind(this);
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};
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return {
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make: make
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};
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function make(loader) {
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var cache = new Cache(loader);
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return {
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get: cache.get.bind(cache),
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warmUp: cache.warmUp.bind(cache)
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};
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}
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