42 lines
1 KiB
JavaScript
42 lines
1 KiB
JavaScript
import axios from './axios_utils';
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import Cache from './cache';
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class AjaxCache extends Cache {
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constructor() {
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super();
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this.pendingRequests = { };
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}
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override(endpoint, data) {
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this.internalStorage[endpoint] = data;
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}
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retrieve(endpoint, forceRetrieve) {
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if (this.hasData(endpoint) && !forceRetrieve) {
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return Promise.resolve(this.get(endpoint));
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}
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let pendingRequest = this.pendingRequests[endpoint];
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if (!pendingRequest) {
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pendingRequest = axios.get(endpoint)
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.then(({ data }) => {
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this.internalStorage[endpoint] = data;
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delete this.pendingRequests[endpoint];
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})
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.catch((e) => {
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const error = new Error(`${endpoint}: ${e.message}`);
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error.textStatus = e.message;
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delete this.pendingRequests[endpoint];
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throw error;
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});
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this.pendingRequests[endpoint] = pendingRequest;
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}
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return pendingRequest.then(() => this.get(endpoint));
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}
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}
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export default new AjaxCache();
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