75 lines
1.0 KiB
JavaScript
75 lines
1.0 KiB
JavaScript
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/*
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Copyright (c) 2020, 2023, The Unified Company.
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This code is part of Unify.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE,
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as published by the Free Software Foundation.
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See the GNU AFFERO GENERAL PUBLIC LICENSE, for more details.
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https://unifyjs.org
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*/
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export default class fileLoader{
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files = new Array();
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filesExists = new Array();
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async get( url ) {
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return await this.getFile( url );
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}
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exists( url )
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{
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if( this.filesExists[ url ] ) {
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return this.filesExists[ url ];
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}
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var http = new XMLHttpRequest();
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http.open('HEAD', url, false);
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http.send();
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this.filesExists[ url ] = http.status != 404;
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return http.status != 404;
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}
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async getFile( url ) {
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if( this.files[ url ] ) {
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return this.files[ url ];
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} else {
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var response = await fetch( url );
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var json = await response.json();
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this.addFile( url, json );
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return json;
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}
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}
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addFile( url, json ) {
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this.files[ url ] = json;
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}
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}
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