chrono-node
Version:
A natural language date parser in Javascript
64 lines • 2.92 kB
JavaScript
import { AbstractParserWithWordBoundaryChecking } from "../../../common/parsers/AbstractParserWithWordBoundary.js";
import { assignSimilarDate, implySimilarTime } from "../../../utils/dates.js";
import DECasualTimeParser from "./DECasualTimeParser.js";
import * as references from "../../../common/casualReferences.js";
import { addDuration } from "../../../calculation/duration.js";
const PATTERN = new RegExp(`(jetzt|heute|morgen|übermorgen|uebermorgen|gestern|vorgestern|letzte\\s*nacht)` +
`(?:\\s*(morgen|vormittag|mittags?|nachmittag|abend|nacht|mitternacht))?` +
`(?=\\W|$)`, "i");
const DATE_GROUP = 1;
const TIME_GROUP = 2;
export default class DECasualDateParser extends AbstractParserWithWordBoundaryChecking {
innerPattern(context) {
return PATTERN;
}
innerExtract(context, match) {
let targetDate = context.reference.getDateWithAdjustedTimezone();
const dateKeyword = (match[DATE_GROUP] || "").toLowerCase();
const timeKeyword = (match[TIME_GROUP] || "").toLowerCase();
let component = context.createParsingComponents();
switch (dateKeyword) {
case "jetzt":
component = references.now(context.reference);
break;
case "heute":
component = references.today(context.reference);
break;
case "morgen":
targetDate = addDuration(targetDate, { day: 1 });
assignSimilarDate(component, targetDate);
implySimilarTime(component, targetDate);
break;
case "übermorgen":
case "uebermorgen":
targetDate = addDuration(targetDate, { day: 2 });
assignSimilarDate(component, targetDate);
implySimilarTime(component, targetDate);
break;
case "gestern":
targetDate = addDuration(targetDate, { day: -1 });
assignSimilarDate(component, targetDate);
implySimilarTime(component, targetDate);
break;
case "vorgestern":
targetDate = addDuration(targetDate, { day: -2 });
assignSimilarDate(component, targetDate);
implySimilarTime(component, targetDate);
break;
default:
if (dateKeyword.match(/letzte\s*nacht/)) {
if (targetDate.getHours() > 6) {
targetDate = addDuration(targetDate, { day: -1 });
}
assignSimilarDate(component, targetDate);
component.imply("hour", 0);
}
break;
}
if (timeKeyword) {
component = DECasualTimeParser.extractTimeComponents(component, timeKeyword);
}
return component;
}
}
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