chrono-node
Version:
A natural language date parser in Javascript
48 lines • 1.87 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
const constants_1 = require("../constants");
const years_1 = require("../../../calculation/years");
const PATTERN = /(?:(?:([同今本])|((昭和|平成|令和)?([0-9０-９]{1,4}|元)))年\s*)?([0-9０-９]{1,2})月\s*([0-9０-９]{1,2})日/i;
const SPECIAL_YEAR_GROUP = 1;
const TYPICAL_YEAR_GROUP = 2;
const ERA_GROUP = 3;
const YEAR_NUMBER_GROUP = 4;
const MONTH_GROUP = 5;
const DAY_GROUP = 6;
class JPStandardParser {
pattern() {
return PATTERN;
}
extract(context, match) {
const month = parseInt((0, constants_1.toHankaku)(match[MONTH_GROUP]));
const day = parseInt((0, constants_1.toHankaku)(match[DAY_GROUP]));
const components = context.createParsingComponents({
day: day,
month: month,
});
if (match[SPECIAL_YEAR_GROUP] && match[SPECIAL_YEAR_GROUP].match("同|今|本")) {
components.assign("year", context.reference.getDateWithAdjustedTimezone().getFullYear());
}
if (match[TYPICAL_YEAR_GROUP]) {
const yearNumText = match[YEAR_NUMBER_GROUP];
let year = yearNumText == "元" ? 1 : parseInt((0, constants_1.toHankaku)(yearNumText));
if (match[ERA_GROUP] == "令和") {
year += 2018;
}
else if (match[ERA_GROUP] == "平成") {
year += 1988;
}
else if (match[ERA_GROUP] == "昭和") {
year += 1925;
}
components.assign("year", year);
}
else {
const year = (0, years_1.findYearClosestToRef)(context.refDate, day, month);
components.imply("year", year);
}
return components;
}
}
exports.default = JPStandardParser;
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