chrono-node
Version:
A natural language date parser in Javascript
25 lines • 1.18 kB
JavaScript
import { TIME_UNITS_PATTERN, parseTimeUnits } from "../constants.js";
import { ParsingComponents } from "../../../results.js";
import { AbstractParserWithWordBoundaryChecking } from "../../../common/parsers/AbstractParserWithWordBoundary.js";
import { reverseTimeUnits } from "../../../utils/timeunits.js";
const PATTERN = new RegExp(`(dit|deze|vorig|afgelopen|(?:aan)?komend|over|\\+|-)e?\\s*(${TIME_UNITS_PATTERN})(?=\\W|$)`, "i");
const PREFIX_WORD_GROUP = 1;
const TIME_UNIT_WORD_GROUP = 2;
export default class NLTimeUnitCasualRelativeFormatParser extends AbstractParserWithWordBoundaryChecking {
innerPattern() {
return PATTERN;
}
innerExtract(context, match) {
const prefix = match[PREFIX_WORD_GROUP].toLowerCase();
let timeUnits = parseTimeUnits(match[TIME_UNIT_WORD_GROUP]);
switch (prefix) {
case "vorig":
case "afgelopen":
case "-":
timeUnits = reverseTimeUnits(timeUnits);
break;
}
return ParsingComponents.createRelativeFromReference(context.reference, timeUnits);
}
}
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