systemprompt-mcp-gmail/build/services/google-auth-service.js

A specialized Model Context Protocol (MCP) server that enables you to search, read, delete and send emails from your Gmail account, leveraging an AI Agent to help with each operation.

import { google } from "googleapis";
export class GoogleAuthService {
    static instance;
    oAuth2Client = null;
    constructor() { }
    static getInstance() {
        if (!GoogleAuthService.instance) {
            GoogleAuthService.instance = new GoogleAuthService();
        }
        return GoogleAuthService.instance;
    }
    async initialize() {
        try {
            const credentialsBase64 = process.env.GOOGLE_CREDENTIALS;
            if (!credentialsBase64) {
                throw new Error("GOOGLE_CREDENTIALS environment variable is not set");
            }
            const decodedCredentials = Buffer.from(credentialsBase64, "base64").toString();
            const credentials = JSON.parse(decodedCredentials);
            // Check credentials format first
            if (!credentials.web && !credentials.installed) {
                throw new Error(`Invalid credentials format: credentials must contain either 'web' or 'installed' configuration. Received keys: ${Object.keys(credentials).join(", ")}`);
            }
            const config = credentials.web || credentials.installed;
            if (!config) {
                throw new Error("Neither web nor installed credentials found");
            }
            const { client_secret, client_id, redirect_uris } = config;
            if (!client_secret || !client_id || !redirect_uris?.length) {
                throw new Error("Invalid credentials: missing required fields (client_secret, client_id, or redirect_uris)");
            }
            this.oAuth2Client = new google.auth.OAuth2(client_id, client_secret, redirect_uris[0]);
            const tokenBase64 = process.env.GOOGLE_TOKEN;
            try {
                if (tokenBase64) {
                    const token = JSON.parse(Buffer.from(tokenBase64, "base64").toString());
                    this.oAuth2Client.setCredentials(token);
                }
            }
            catch (error) {
                console.error("Error parsing token:", error);
                throw error;
            }
        }
        catch (error) {
            console.error("Error loading Google credentials:", error);
            throw error;
        }
    }
    getAuth() {
        if (!this.oAuth2Client) {
            throw new Error("OAuth2Client not initialized");
        }
        return this.oAuth2Client;
    }
}
//# sourceMappingURL=google-auth-service.js.map