chrono-node
Version:
A natural language date parser in Javascript
32 lines • 1.57 kB
JavaScript
import { TIME_UNITS_PATTERN, parseDuration, TIME_UNITS_NO_ABBR_PATTERN } from "../constants.js";
import { ParsingComponents } from "../../../results.js";
import { AbstractParserWithWordBoundaryChecking } from "../../../common/parsers/AbstractParserWithWordBoundary.js";
import { reverseDuration } from "../../../calculation/duration.js";
const PATTERN = new RegExp(`(?:il\\s*|la\\s*|l'\\s*)?(questo|questa|quest'|scorso|scorsa|prossimo|prossima|dopo|\\+|-)\\s*(${TIME_UNITS_PATTERN})(?=\\W|$)`, "i");
const PATTERN_NO_ABBR = new RegExp(`(?:il\\s*|la\\s*|l'\\s*)?(questo|questa|quest'|scorso|scorsa|prossimo|prossima|dopo|\\+|-)\\s*(${TIME_UNITS_NO_ABBR_PATTERN})(?=\\W|$)`, "i");
export default class ITTimeUnitCasualRelativeFormatParser extends AbstractParserWithWordBoundaryChecking {
allowAbbreviations;
constructor(allowAbbreviations = true) {
super();
this.allowAbbreviations = allowAbbreviations;
}
innerPattern() {
return this.allowAbbreviations ? PATTERN : PATTERN_NO_ABBR;
}
innerExtract(context, match) {
const prefix = match[1].toLowerCase();
let duration = parseDuration(match[2]);
if (!duration) {
return null;
}
switch (prefix) {
case "scorso":
case "scorsa":
case "-":
duration = reverseDuration(duration);
break;
}
return ParsingComponents.createRelativeFromReference(context.reference, duration);
}
}
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