45 lines
2.0 KiB
TypeScript
45 lines
2.0 KiB
TypeScript
// import crypto from 'crypto';
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export class CertificateDownloader{
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static instance: CertificateDownloader;
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// private readonly baseUrl = 'https://get.dgc.gov.it';
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private readonly keyStorage = 'cerificate_collection';
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private readonly timeSpan = 86400000;
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// private readonly timeSpan = 1000;
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private cerficateCollection = {}
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// eslint-disable-next-line @typescript-eslint/no-empty-function
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private constructor(){}
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public getCertificates(): unknown {
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const savedData = JSON.parse(localStorage.getItem(this.keyStorage) || '{}');
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if(savedData.lastupdateDate == null || Date.now() - savedData?.lastupdateDate > this.timeSpan){
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this.getAllCertificate()
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.then(() => { console.log('could not read the certificates from the local file'); return this.cerficateCollection })
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.catch(console.error);
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}
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console.log('cerficates collection is valid loading from local source');
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// console.log(dataRead.certificates);
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this.cerficateCollection = savedData.certificates;
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return this.cerficateCollection;
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}
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public static getCertificateDownloader():CertificateDownloader{
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if(CertificateDownloader.instance == undefined){
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CertificateDownloader.instance = new CertificateDownloader();
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}
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return CertificateDownloader.instance;
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}
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async getAllCertificate(): Promise<void> {
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this.cerficateCollection = {};
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const response = (await fetch('https://raw.githubusercontent.com/lovasoa/sanipasse/master/src/assets/Digital_Green_Certificate_Signing_Keys.json'));
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if(response.ok){
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this.cerficateCollection = await response.json();
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console.log(response);
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const lastupdateDate = Date.now();
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localStorage.setItem(this.keyStorage, JSON.stringify({'certificates':this.cerficateCollection, lastupdateDate}))
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// fs.writeFile('./cerificate_collection.json', JSON.stringify({'certificates':this.cerficateCollection, lastupdateDate}),'utf8',console.error);
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}else{
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throw new Error(response.statusText);
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}
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}
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} |