chrono-node
Version:
A natural language date parser in Javascript
23 lines • 1.15 kB
JavaScript
import { parseTimeUnits, TIME_UNITS_NO_ABBR_PATTERN, TIME_UNITS_PATTERN } from "../constants.js";
import { ParsingComponents } from "../../../results.js";
import { AbstractParserWithWordBoundaryChecking } from "../../../common/parsers/AbstractParserWithWordBoundary.js";
const PATTERN = new RegExp(`(${TIME_UNITS_PATTERN})\\s{0,5}(?:later|after|from now|henceforth|forward|out)` + "(?=(?:\\W|$))", "i");
const STRICT_PATTERN = new RegExp(`(${TIME_UNITS_NO_ABBR_PATTERN})\\s{0,5}(later|after|from now)(?=\\W|$)`, "i");
const GROUP_NUM_TIMEUNITS = 1;
export default class ENTimeUnitLaterFormatParser extends AbstractParserWithWordBoundaryChecking {
constructor(strictMode) {
super();
this.strictMode = strictMode;
}
innerPattern() {
return this.strictMode ? STRICT_PATTERN : PATTERN;
}
innerExtract(context, match) {
const timeUnits = parseTimeUnits(match[GROUP_NUM_TIMEUNITS]);
if (!timeUnits) {
return null;
}
return ParsingComponents.createRelativeFromReference(context.reference, timeUnits);
}
}
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