chrono-node
Version:
A natural language date parser in Javascript
40 lines • 1.7 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
const TIMEZONE_OFFSET_PATTERN = new RegExp("^\\s*(?:\\(?(?:GMT|UTC)\\s?)?([+-])(\\d{1,2})(?::?(\\d{2}))?\\)?", "i");
const TIMEZONE_OFFSET_SIGN_GROUP = 1;
const TIMEZONE_OFFSET_HOUR_OFFSET_GROUP = 2;
const TIMEZONE_OFFSET_MINUTE_OFFSET_GROUP = 3;
class ExtractTimezoneOffsetRefiner {
refine(context, results) {
results.forEach(function (result) {
if (result.start.isCertain("timezoneOffset")) {
return;
}
const suffix = context.text.substring(result.index + result.text.length);
const match = TIMEZONE_OFFSET_PATTERN.exec(suffix);
if (!match) {
return;
}
context.debug(() => {
console.log(`Extracting timezone: '${match[0]}' into : ${result}`);
});
const hourOffset = parseInt(match[TIMEZONE_OFFSET_HOUR_OFFSET_GROUP]);
const minuteOffset = parseInt(match[TIMEZONE_OFFSET_MINUTE_OFFSET_GROUP] || "0");
let timezoneOffset = hourOffset * 60 + minuteOffset;
if (timezoneOffset > 14 * 60) {
return;
}
if (match[TIMEZONE_OFFSET_SIGN_GROUP] === "-") {
timezoneOffset = -timezoneOffset;
}
if (result.end != null) {
result.end.assign("timezoneOffset", timezoneOffset);
}
result.start.assign("timezoneOffset", timezoneOffset);
result.text += match[0];
});
return results;
}
}
exports.default = ExtractTimezoneOffsetRefiner;
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