chrono-node
Version:
A natural language date parser in Javascript
63 lines • 2.4 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*?)?" +
`(${constants_2.ORDINAL_NUMBER_PATTERN})` +
"(?:\\s*" +
"(?:tot|\\-|\\–|until|through|till|\\s)\\s*" +
`(${constants_2.ORDINAL_NUMBER_PATTERN})` +
")?" +
"(?:-|/|\\s*(?:of)?\\s*)" +
"(" +
pattern_1.matchAnyPattern(constants_1.MONTH_DICTIONARY) +
")" +
"(?:" +
"(?:-|/|,?\\s*)" +
`(${constants_3.YEAR_PATTERN}(?![^\\s]\\d))` +
")?" +
"(?=\\W|$)", "i");
const MONTH_NAME_GROUP = 3;
const DATE_GROUP = 1;
const DATE_TO_GROUP = 2;
const YEAR_GROUP = 4;
class NLMonthNameMiddleEndianParser extends AbstractParserWithWordBoundary_1.AbstractParserWithWordBoundaryChecking {
innerPattern() {
return PATTERN;
}
innerExtract(context, match) {
const month = constants_1.MONTH_DICTIONARY[match[MONTH_NAME_GROUP].toLowerCase()];
const day = constants_2.parseOrdinalNumberPattern(match[DATE_GROUP]);
if (day > 31) {
match.index = match.index + match[DATE_GROUP].length;
return null;
}
const components = context.createParsingComponents({
day: day,
month: month,
});
if (match[YEAR_GROUP]) {
const year = constants_3.parseYear(match[YEAR_GROUP]);
components.assign("year", year);
}
else {
const year = years_1.findYearClosestToRef(context.refDate, day, month);
components.imply("year", year);
}
if (!match[DATE_TO_GROUP]) {
return components;
}
const endDate = constants_2.parseOrdinalNumberPattern(match[DATE_TO_GROUP]);
const result = context.createParsingResult(match.index, match[0]);
result.start = components;
result.end = components.clone();
result.end.assign("day", endDate);
return result;
}
}
exports.default = NLMonthNameMiddleEndianParser;
//# sourceMappingURL=NLMonthNameMiddleEndianParser.js.map