import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
import { z } from "zod";
import { DateTime } from "luxon";
export function register(server: McpServer): void {
server.tool(
"get_current_time",
"Get the current time in a specified timezone. Returns detailed time information including year, month, day, hour, minute, second, weekday, week of year, day of year, and UTC offset.",
{
timezone: z.string().optional().describe("IANA timezone (e.g. Asia/Shanghai, America/New_York). Defaults to UTC."),
format: z.enum(["iso", "human", "relative"]).optional().describe("Output format: iso (default), human (readable), relative (time ago from UTC)"),
},
async ({ timezone, format }) => {
const tz = timezone || "UTC";
const now = DateTime.now().setZone(tz);
if (!now.isValid) {
return {
content: [{ type: "text", text: JSON.stringify({ error: `Invalid timezone: ${tz}` }) }],
};
}
const fmt = format || "iso";
const result: Record<string, unknown> = {
timezone: tz,
timestamp: now.toMillis(),
year: now.year,
month: now.month,
day: now.day,
hour: now.hour,
minute: now.minute,
second: now.second,
weekday: now.weekdayLong,
weekOfYear: now.weekNumber,
dayOfYear: now.ordinal,
utcOffset: now.toFormat("ZZ"),
};
if (fmt === "iso") {
result.datetime = now.toISO();
} else if (fmt === "human") {
result.datetime = now.toLocaleString(DateTime.DATETIME_FULL_WITH_SECONDS);
} else if (fmt === "relative") {
const diff = now.diffNow(["hours", "minutes", "seconds"]);
result.datetime = now.toISO();
result.relativeToUTC = `${diff.hours}h ${diff.minutes}m ${Math.floor(diff.seconds)}s`;
}
return {
content: [{ type: "text", text: JSON.stringify(result, null, 2) }],
};
}
);
}
