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21 lines
592 B
TypeScript
21 lines
592 B
TypeScript
// Loaded from https://deno.land/x/dndb@0.2.4/src/methods/findOne.js
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import { matches, project } from '../../deps.ts';
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import { ReadFileStream } from '../storage.ts';
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export default async (filename, query, projection) => {
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let stream = new ReadFileStream(filename);
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query = query || {};
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return new Promise((resolve, reject) => {
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stream.on('document', obj => {
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if (matches(query, obj)) {
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obj = Object.keys(projection).length ? project(obj, projection) : obj;
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resolve(obj)
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}
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})
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stream.on('end', () => {
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return resolve(null);
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})
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})
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} |