MCP Time Server Node

/** * MCP SDK Adapter - Public API * * This is what our tools import instead of the raw MCP SDK. * It provides a clean, testable interface that shields our code * from SDK bugs and changes. * * Tools should NEVER import directly from @modelcontextprotocol/sdk! */ // Import mapper for internal use import { mapToMcpError } from './mapper'; // Export our error classes (what tools throw) export { BaseError, ValidationError, TimezoneError, DateParsingError, BusinessHoursError, HolidayDataError, TimeCalculationError, } from './errors'; // Re-export the mapper (for index.ts to use) export { mapToMcpError }; // Re-export MCP types we need (with our fixes applied) export { McpError, ErrorCode, CallToolResult } from '@modelcontextprotocol/sdk/types.js'; // Export helper types for tools export type ToolResult = { content: Array<{ type: 'text'; text: string }>; }; export type ToolHandler<T = unknown> = (params: T) => ToolResult | Promise<ToolResult>; /** * Helper function for tools to throw MCP-compatible errors * * @param error - The error to throw * @param toolName - Name of the tool throwing the error * @throws McpError - Always throws, properly formatted for MCP */ export function throwMcpError(error: unknown, toolName: string): never { // Import the mapper function from the same module const mcpError = mapToMcpError(error, toolName); throw mcpError; } /** * Wraps a tool handler with automatic error mapping * * @param toolName - Name of the tool for error context * @param handler - The tool handler function * @returns Wrapped handler that catches and maps errors */ export function wrapToolHandler<T = unknown>( toolName: string, handler: ToolHandler<T> ): ToolHandler<T> { return async (params: T): Promise<ToolResult> => { try { return await handler(params); } catch (error) { throwMcpError(error, toolName); } }; }