55 lines
1.2 KiB
JavaScript
55 lines
1.2 KiB
JavaScript
// We can insert data into the PreloadStore when the document is loaded.
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// The data can be accessed once by a key, after which it is removed
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import { Promise } from "rsvp";
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export default {
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data: {},
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store(key, value) {
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this.data[key] = value;
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},
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/**
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To retrieve a key, you provide the key you want, plus a finder to load
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it if the key cannot be found. Once the key is used once, it is removed
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from the store.
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So, for example, you can't load a preloaded topic more than once.
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**/
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getAndRemove(key, finder) {
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if (this.data[key]) {
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let promise = Promise.resolve(this.data[key]);
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delete this.data[key];
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return promise;
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}
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if (finder) {
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return new Promise(function(resolve, reject) {
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let result = finder();
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// If the finder returns a promise, we support that too
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if (result && result.then) {
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result
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.then(toResolve => resolve(toResolve))
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.catch(toReject => reject(toReject));
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} else {
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resolve(result);
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}
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});
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}
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return Promise.resolve(null);
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},
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get(key) {
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return this.data[key];
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},
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remove(key) {
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if (this.data[key]) delete this.data[key];
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},
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reset() {
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this.data = {};
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}
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};
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