M365 Copilot MCP Server

import { APIError } from './errors.js'; import { info, error as logError, debug } from './logger.js'; /** * Call Microsoft Graph REST API * @param endpoint - API endpoint path (e.g., '/beta/copilot/retrieval') * @param method - HTTP method * @param body - Request body (will be JSON stringified) * @param accessToken - Azure AD access token * @returns Parsed JSON response */ export async function callGraphApi( endpoint: string, method: 'GET' | 'POST' | 'PUT' | 'DELETE', body: any | null, accessToken: string ): Promise<any> { const url = `https://graph.microsoft.com${endpoint}`; debug(`Making ${method} request to ${url}`, { endpoint, hasBody: !!body, bodyKeys: body ? Object.keys(body) : [] }); try { const response = await fetch(url, { method, headers: { 'Authorization': `Bearer ${accessToken}`, 'Content-Type': 'application/json', 'Accept': 'application/json', }, body: body ? JSON.stringify(body) : undefined, }); // Log response status debug(`Response status: ${response.status} ${response.statusText}`); // Handle error responses if (!response.ok) { const errorBody = await response.text(); let errorMessage = `Graph API error: ${response.status} ${response.statusText}`; let errorDetails: any = { status: response.status, statusText: response.statusText }; // Try to parse error body as JSON try { const errorJson = JSON.parse(errorBody); if (errorJson.error) { errorMessage = errorJson.error.message || errorMessage; errorDetails = { ...errorDetails, code: errorJson.error.code, message: errorJson.error.message, details: errorJson.error.details, }; } } catch { // Error body is not JSON, use as-is errorDetails.body = errorBody; } logError(`Graph API call failed: ${errorMessage}`, errorDetails); throw new APIError( errorMessage, response.status, errorDetails ); } // Parse successful response const responseData = await response.json(); info(`Graph API call succeeded: ${method} ${endpoint}`); return responseData; } catch (error) { // If it's already an APIError, rethrow if (error instanceof APIError) { throw error; } // Handle network errors or other failures logError(`Network or fetch error calling Graph API: ${method} ${endpoint}`, error); throw new APIError( `Failed to call Graph API: ${error instanceof Error ? error.message : 'Unknown error'}`, undefined, // No status code for network errors { endpoint, method, originalError: error } ); } }