chrono-node
Version:
A natural language date parser in Javascript
57 lines • 2.35 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
const years_1 = require("../../../calculation/years");
const constants_1 = require("../constants");
const constants_2 = require("../constants");
const constants_3 = require("../constants");
const pattern_1 = require("../../../utils/pattern");
const AbstractParserWithWordBoundary_1 = require("../../../common/parsers/AbstractParserWithWordBoundary");
const PATTERN = new RegExp(`(?:on\\s{0,3})?` +
`(${constants_3.ORDINAL_NUMBER_PATTERN})` +
`(?:` +
`\\s{0,3}(?:to|\\-|\\–|until|through|till)?\\s{0,3}` +
`(${constants_3.ORDINAL_NUMBER_PATTERN})` +
")?" +
`(?:-|/|\\s{0,3}(?:of)?\\s{0,3})` +
`(${(0, pattern_1.matchAnyPattern)(constants_1.MONTH_DICTIONARY)})` +
"(?:" +
`(?:-|/|,?\\s{0,3})` +
`(${constants_2.YEAR_PATTERN}(?!\\w))` +
")?" +
"(?=\\W|$)", "i");
const DATE_GROUP = 1;
const DATE_TO_GROUP = 2;
const MONTH_NAME_GROUP = 3;
const YEAR_GROUP = 4;
class ENMonthNameLittleEndianParser extends AbstractParserWithWordBoundary_1.AbstractParserWithWordBoundaryChecking {
innerPattern() {
return PATTERN;
}
innerExtract(context, match) {
const result = context.createParsingResult(match.index, match[0]);
const month = constants_1.MONTH_DICTIONARY[match[MONTH_NAME_GROUP].toLowerCase()];
const day = (0, constants_3.parseOrdinalNumberPattern)(match[DATE_GROUP]);
if (day > 31) {
match.index = match.index + match[DATE_GROUP].length;
return null;
}
result.start.assign("month", month);
result.start.assign("day", day);
if (match[YEAR_GROUP]) {
const yearNumber = (0, constants_2.parseYear)(match[YEAR_GROUP]);
result.start.assign("year", yearNumber);
}
else {
const year = (0, years_1.findYearClosestToRef)(context.refDate, day, month);
result.start.imply("year", year);
}
if (match[DATE_TO_GROUP]) {
const endDate = (0, constants_3.parseOrdinalNumberPattern)(match[DATE_TO_GROUP]);
result.end = result.start.clone();
result.end.assign("day", endDate);
}
return result;
}
}
exports.default = ENMonthNameLittleEndianParser;
//# sourceMappingURL=ENMonthNameLittleEndianParser.js.map