chrono-node
Version:
A natural language date parser in Javascript
69 lines • 2.98 kB
JavaScript
import dayjs from "dayjs";
import { Meridiem } from "../../../types.js";
import { AbstractParserWithWordBoundaryChecking } from "../../../common/parsers/AbstractParserWithWordBoundary.js";
import { implySimilarTime } from "../../../utils/dayjs.js";
import { addImpliedTimeUnits } from "../../../utils/timeunits.js";
export default class DECasualTimeParser extends AbstractParserWithWordBoundaryChecking {
innerPattern(context) {
return /(diesen)?\s*(morgen|vormittag|mittags?|nachmittag|abend|nacht|mitternacht)(?=\W|$)/i;
}
innerExtract(context, match) {
const targetDate = dayjs(context.refDate);
const timeKeywordPattern = match[2].toLowerCase();
const component = context.createParsingComponents();
implySimilarTime(component, targetDate);
return DECasualTimeParser.extractTimeComponents(component, timeKeywordPattern);
}
static extractTimeComponents(component, timeKeywordPattern) {
switch (timeKeywordPattern) {
case "morgen":
component.imply("hour", 6);
component.imply("minute", 0);
component.imply("second", 0);
component.imply("meridiem", Meridiem.AM);
break;
case "vormittag":
component.imply("hour", 9);
component.imply("minute", 0);
component.imply("second", 0);
component.imply("meridiem", Meridiem.AM);
break;
case "mittag":
case "mittags":
component.imply("hour", 12);
component.imply("minute", 0);
component.imply("second", 0);
component.imply("meridiem", Meridiem.AM);
break;
case "nachmittag":
component.imply("hour", 15);
component.imply("minute", 0);
component.imply("second", 0);
component.imply("meridiem", Meridiem.PM);
break;
case "abend":
component.imply("hour", 18);
component.imply("minute", 0);
component.imply("second", 0);
component.imply("meridiem", Meridiem.PM);
break;
case "nacht":
component.imply("hour", 22);
component.imply("minute", 0);
component.imply("second", 0);
component.imply("meridiem", Meridiem.PM);
break;
case "mitternacht":
if (component.get("hour") > 1) {
component = addImpliedTimeUnits(component, { "day": 1 });
}
component.imply("hour", 0);
component.imply("minute", 0);
component.imply("second", 0);
component.imply("meridiem", Meridiem.AM);
break;
}
return component;
}
}
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