chrono-node
Version:
A natural language date parser in Javascript
33 lines • 1.64 kB
JavaScript
import { NUMBER_PATTERN, parseNumberPattern, TIME_UNIT_DICTIONARY } from "../constants.js";
import { ParsingComponents } from "../../../results.js";
import { AbstractParserWithWordBoundaryChecking } from "../../../common/parsers/AbstractParserWithWordBoundary.js";
import { reverseTimeUnits } from "../../../utils/timeunits.js";
import { matchAnyPattern } from "../../../utils/pattern.js";
export default class FRTimeUnitAgoFormatParser extends AbstractParserWithWordBoundaryChecking {
constructor() {
super();
}
innerPattern() {
return new RegExp(`(?:les?|la|l'|du|des?)\\s*` +
`(${NUMBER_PATTERN})?` +
`(?:\\s*(prochaine?s?|derni[eè]re?s?|pass[ée]e?s?|pr[ée]c[ée]dents?|suivante?s?))?` +
`\\s*(${matchAnyPattern(TIME_UNIT_DICTIONARY)})` +
`(?:\\s*(prochaine?s?|derni[eè]re?s?|pass[ée]e?s?|pr[ée]c[ée]dents?|suivante?s?))?`, "i");
}
innerExtract(context, match) {
const num = match[1] ? parseNumberPattern(match[1]) : 1;
const unit = TIME_UNIT_DICTIONARY[match[3].toLowerCase()];
let timeUnits = {};
timeUnits[unit] = num;
let modifier = match[2] || match[4] || "";
modifier = modifier.toLowerCase();
if (!modifier) {
return;
}
if (/derni[eè]re?s?/.test(modifier) || /pass[ée]e?s?/.test(modifier) || /pr[ée]c[ée]dents?/.test(modifier)) {
timeUnits = reverseTimeUnits(timeUnits);
}
return ParsingComponents.createRelativeFromReference(context.reference, timeUnits);
}
}
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