@coretext-ai/qa-google-contacts-a58500d5-8331-4ce9-a140-d204a9fae815/dist/oauth/credential-loader.js

MCP server with google-contacts integration

import fs from 'fs-extra';
import path from 'path';
import os from 'os';
export class CredentialLoader {
    /**
     * Load OAuth credentials from file
     */
    async loadCredentials(credentialFilePath) {
        try {
            const resolvedPath = this.resolvePath(credentialFilePath);
            if (!await fs.pathExists(resolvedPath)) {
                throw new Error(`Credential file not found: ${resolvedPath}`);
            }
            const content = await fs.readFile(resolvedPath, 'utf-8');
            const credentialData = JSON.parse(content);
            return this.extractCredentials(credentialData);
        }
        catch (error) {
            const errorMessage = error instanceof Error ? error.message : String(error);
            console.error(`Failed to load credentials: ${errorMessage}`);
            throw new Error(`Credential loading failed: ${errorMessage}`);
        }
    }
    /**
     * Extract credentials from various credential file formats
     */
    extractCredentials(credentialData) {
        if (credentialData.installed) {
            return credentialData.installed;
        }
        else if (credentialData.web) {
            return credentialData.web;
        }
        else {
            throw new Error('Invalid credential file format. Must contain "installed" or "web" configuration.');
        }
    }
    /**
     * Resolve credential file path (handle environment variables and relative paths)
     */
    resolvePath(filePath) {
        // Handle environment variable references
        if (filePath.startsWith('$')) {
            const envVar = filePath.substring(1);
            const envPath = process.env[envVar];
            if (!envPath) {
                throw new Error(`Environment variable ${envVar} not set`);
            }
            return path.resolve(envPath);
        }
        // Handle tilde expansion
        if (filePath.startsWith('~')) {
            return path.resolve(os.homedir(), filePath.substring(2));
        }
        // Handle relative paths
        if (!path.isAbsolute(filePath)) {
            return path.resolve(process.cwd(), filePath);
        }
        return filePath;
    }
}
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