chrono-node
Version:
A natural language date parser in Javascript
56 lines • 2.83 kB
JavaScript
import { TIME_UNIT_DICTIONARY } from "../constants.js";
import { ParsingComponents } from "../../../results.js";
import { matchAnyPattern } from "../../../utils/pattern.js";
import { AbstractParserWithLeftRightBoundaryChecking } from "./AbstractParserWithWordBoundaryChecking.js";
const MODIFIER_WORD_GROUP = 1;
const RELATIVE_WORD_GROUP = 2;
export default class UKRelativeDateFormatParser extends AbstractParserWithLeftRightBoundaryChecking {
innerPatternString(context) {
return (`(в минулому|у минулому|на минулому|минулого|на наступному|в наступному|у наступному|наступного|на цьому|в цьому|у цьому|цього)\\s*` +
`(${matchAnyPattern(TIME_UNIT_DICTIONARY)})(?=\\s*)`);
}
innerExtract(context, match) {
const modifier = match[MODIFIER_WORD_GROUP].toLowerCase();
const unitWord = match[RELATIVE_WORD_GROUP].toLowerCase();
const timeunit = TIME_UNIT_DICTIONARY[unitWord];
if (modifier == "на наступному" ||
modifier == "в наступному" ||
modifier == "у наступному" ||
modifier == "наступного") {
const timeUnits = {};
timeUnits[timeunit] = 1;
return ParsingComponents.createRelativeFromReference(context.reference, timeUnits);
}
if (modifier == "на минулому" ||
modifier == "в минулому" ||
modifier == "у минулому" ||
modifier == "минулого") {
const timeUnits = {};
timeUnits[timeunit] = -1;
return ParsingComponents.createRelativeFromReference(context.reference, timeUnits);
}
const components = context.createParsingComponents();
let date = new Date(context.reference.instant.getTime());
if (timeunit.match(/week/i)) {
date.setDate(date.getDate() - date.getDay());
components.imply("day", date.getDate());
components.imply("month", date.getMonth() + 1);
components.imply("year", date.getFullYear());
}
else if (timeunit.match(/month/i)) {
date.setDate(1);
components.imply("day", date.getDate());
components.assign("year", date.getFullYear());
components.assign("month", date.getMonth() + 1);
}
else if (timeunit.match(/year/i)) {
date.setDate(1);
date.setMonth(0);
components.imply("day", date.getDate());
components.imply("month", date.getMonth() + 1);
components.assign("year", date.getFullYear());
}
return components;
}
}
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