Rhombus MCP Server

import { parse } from "chrono-node"; import { DateTime } from "luxon"; import { logger } from "../logger.js"; export function nullToUndefined(value: number | null): number | undefined { return value === null ? undefined : value; } function normalizeTimeDescription(description: string): string { const normalized = description.toLowerCase().trim(); if (normalized.includes("current time")) { return "now"; } // Handle plain day references as start of day if (normalized === "today") { return "today at 00:00"; } if (normalized === "yesterday") { return "yesterday at 00:00"; } if (normalized === "tomorrow") { return "tomorrow at 00:00"; } // Handle "this" time periods - always refer to today if (normalized === "this morning") { return "today at 06:00"; } if (normalized === "this afternoon") { return "today at 12:00"; } if (normalized === "this evening") { return "today at 18:00"; } if (normalized === "this night" || normalized === "tonight") { return "today at 20:00"; } if (normalized.includes("start of today") || normalized.includes("beginning of today")) { return "today at 00:00"; } if (normalized.includes("start of yesterday") || normalized.includes("beginning of yesterday")) { return "yesterday at 00:00"; } if (normalized.includes("start of tomorrow") || normalized.includes("beginning of tomorrow")) { return "tomorrow at 00:00"; } if (normalized.includes("end of today")) { return "today at 23:59:59"; } if (normalized.includes("end of yesterday")) { return "yesterday at 23:59:59"; } if (normalized.includes("end of tomorrow")) { return "tomorrow at 23:59:59"; } return description; } export function parseTimeDescription(time_description: string, timezone?: string, extra?: any) { logger.info("EXTRA", extra); const now = new Date(DateTime.now().setZone(timezone || "America/Los_Angeles").toISO({ includeOffset: false })!); const normalizedDescription = normalizeTimeDescription(time_description); logger.info( `TIME TOOL ${timezone}: Normalized "${time_description}" to "${normalizedDescription}"` ); // Use the timezone-adjusted date as the reference date for chrono-node const parsed = parse(normalizedDescription, now); if (!parsed || parsed.length === 0) { throw new Error(`Could not parse time description: ${time_description}`); } logger.info(`TIME TOOLPARSED ${time_description}`, JSON.stringify(parsed)); const dateComponents = parsed[0].start; if (!dateComponents) { throw new Error("Parsed time has no start component"); } const dt = DateTime.fromObject( { year: nullToUndefined(dateComponents.get("year")), month: nullToUndefined(dateComponents.get("month")), day: nullToUndefined(dateComponents.get("day")), hour: nullToUndefined(dateComponents.get("hour")), minute: nullToUndefined(dateComponents.get("minute")), second: nullToUndefined(dateComponents.get("second")), millisecond: 0, }, { zone: timezone || "local", } ); if (!dt.isValid) { throw new Error(`Could not construct valid DateTime: ${dt.invalidReason}`); } const timestamp = dt.toMillis(); return { timestamp, iso: dt.toISO(), timezone: dt.zoneName, }; }