chrono-node
Version:
A natural language date parser in Javascript
35 lines • 1.39 kB
JavaScript
import { MONTH_DICTIONARY } from "../constants.js";
import { findYearClosestToRef } from "../../../calculation/years.js";
import { matchAnyPattern } from "../../../utils/pattern.js";
import { YEAR_PATTERN, parseYear } from "../constants.js";
import { AbstractParserWithWordBoundaryChecking } from "../../../common/parsers/AbstractParserWithWordBoundary.js";
const PATTERN = new RegExp(`(${matchAnyPattern(MONTH_DICTIONARY)})` +
`\\s*` +
`(?:` +
`[,-]?\\s*(${YEAR_PATTERN})?` +
")?" +
"(?=[^\\s\\w]|\\s+[^0-9]|\\s+$|$)", "i");
const MONTH_NAME_GROUP = 1;
const YEAR_GROUP = 2;
export default class NLMonthNameParser extends AbstractParserWithWordBoundaryChecking {
innerPattern() {
return PATTERN;
}
innerExtract(context, match) {
const components = context.createParsingComponents();
components.imply("day", 1);
const monthName = match[MONTH_NAME_GROUP];
const month = MONTH_DICTIONARY[monthName.toLowerCase()];
components.assign("month", month);
if (match[YEAR_GROUP]) {
const year = parseYear(match[YEAR_GROUP]);
components.assign("year", year);
}
else {
const year = findYearClosestToRef(context.refDate, 1, month);
components.imply("year", year);
}
return components;
}
}
//# sourceMappingURL=NLMonthNameParser.js.map