29 lines
907 B
TypeScript
29 lines
907 B
TypeScript
import { SmartDataDbDoc } from './smartdata.classes.doc.js';
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import * as plugins from './smartdata.plugins.js';
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/**
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* a wrapper for the native mongodb cursor. Exposes better
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*/
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export class SmartdataDbWatcher<T = any> {
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// STATIC
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public readyDeferred = plugins.smartpromise.defer();
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// INSTANCE
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private changeStream: plugins.mongodb.ChangeStream<T>;
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public changeSubject = new plugins.smartrx.rxjs.Subject<T>();
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constructor(changeStreamArg: plugins.mongodb.ChangeStream<T>, smartdataDbDocArg: typeof SmartDataDbDoc) {
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this.changeStream = changeStreamArg;
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this.changeStream.on('change', async (item: T) => {
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this.changeSubject.next(smartdataDbDocArg.createInstanceFromMongoDbNativeDoc(item) as any as T);
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})
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plugins.smartdelay.delayFor(0).then(() => {
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this.readyDeferred.resolve();
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});
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}
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public async close() {
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await this.changeStream.close();
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}
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}
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