chrono-node
Version:
A natural language date parser in Javascript
33 lines • 1.66 kB
JavaScript
import { MergingRefiner } from "../../../common/abstractRefiners.js";
import { ParsingComponents, ParsingResult, ReferenceWithTimezone } from "../../../results.js";
import { parseTimeUnits } from "../constants.js";
import { reverseTimeUnits } from "../../../utils/timeunits.js";
function hasImpliedEarlierReferenceDate(result) {
return result.text.match(/\s+(before|from)$/i) != null;
}
function hasImpliedLaterReferenceDate(result) {
return result.text.match(/\s+(after|since)$/i) != null;
}
export default class ENMergeRelativeFollowByDateRefiner extends MergingRefiner {
patternBetween() {
return /^\s*$/i;
}
shouldMergeResults(textBetween, currentResult, nextResult) {
if (!textBetween.match(this.patternBetween())) {
return false;
}
if (!hasImpliedEarlierReferenceDate(currentResult) && !hasImpliedLaterReferenceDate(currentResult)) {
return false;
}
return !!nextResult.start.get("day") && !!nextResult.start.get("month") && !!nextResult.start.get("year");
}
mergeResults(textBetween, currentResult, nextResult) {
let timeUnits = parseTimeUnits(currentResult.text);
if (hasImpliedEarlierReferenceDate(currentResult)) {
timeUnits = reverseTimeUnits(timeUnits);
}
const components = ParsingComponents.createRelativeFromReference(new ReferenceWithTimezone(nextResult.start.date()), timeUnits);
return new ParsingResult(nextResult.reference, currentResult.index, `${currentResult.text}${textBetween}${nextResult.text}`, components);
}
}
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