#!/usr/bin/env node
/**
* CLI Configuration Tool for LibreLink MCP Server
*
* Usage: npm run configure
*
* Credentials are stored securely using:
* - AES-256-GCM encryption for data at rest
* - Encryption keys stored in OS keychain via Keytar
*/
import * as readline from 'readline';
import { ConfigManager } from './config.js';
import { LibreLinkClient } from './librelink-client.js';
import { LibreLinkRegion, VALID_REGIONS } from './types.js';
const rl = readline.createInterface({
input: process.stdin,
output: process.stdout
});
function question(prompt: string): Promise<string> {
return new Promise((resolve) => {
rl.question(prompt, (answer) => {
resolve(answer.trim());
});
});
}
function questionHidden(prompt: string): Promise<string> {
return new Promise((resolve) => {
process.stdout.write(prompt);
const stdin = process.stdin;
const wasRaw = stdin.isRaw;
if (stdin.isTTY) {
stdin.setRawMode(true);
}
let password = '';
const onData = (char: Buffer) => {
const c = char.toString('utf8');
switch (c) {
case '\n':
case '\r':
case '\u0004':
if (stdin.isTTY) {
stdin.setRawMode(wasRaw);
}
stdin.removeListener('data', onData);
console.log('');
resolve(password);
break;
case '\u0003':
process.exit();
break;
case '\u007F':
case '\b':
password = password.slice(0, -1);
break;
default:
password += c;
process.stdout.write('*');
break;
}
};
stdin.on('data', onData);
stdin.resume();
});
}
async function main() {
console.log('');
console.log('LibreLink MCP Server Configuration');
console.log('===================================');
console.log('');
console.log('This tool will configure your LibreLink credentials.');
console.log('');
console.log('SECURITY: Your credentials are stored securely using:');
console.log(' - AES-256-GCM encryption for data at rest');
console.log(' - Encryption keys stored in your OS keychain');
console.log('');
console.log('IMPORTANT: Use your LibreLinkUp credentials (not LibreLink)');
console.log(' - LibreLinkUp is the follower/sharing app');
console.log(' - Make sure data sharing is enabled in the LibreLink app');
console.log('');
const configManager = new ConfigManager();
// Try to migrate legacy config
const migrated = await configManager.migrateFromLegacy();
if (migrated) {
console.log('Migrated existing credentials to secure storage.');
console.log('');
}
// Load existing credentials
await configManager.loadCredentials();
const existingCredentials = await configManager.getCredentials();
const ranges = configManager.getTargetRanges();
const region = configManager.getRegion();
// Get email
const emailPrompt = existingCredentials?.email
? `Email [${existingCredentials.email}]: `
: 'Email: ';
let email = await question(emailPrompt);
if (!email && existingCredentials?.email) {
email = existingCredentials.email;
}
if (!email) {
console.log('Email is required');
rl.close();
process.exit(1);
}
// Get password
console.log('');
const passwordPrompt = existingCredentials?.password
? 'Password (press Enter to keep existing): '
: 'Password: ';
let password = await questionHidden(passwordPrompt);
if (!password && existingCredentials?.password) {
password = existingCredentials.password;
console.log('(keeping existing password)');
}
if (!password) {
console.log('Password is required');
rl.close();
process.exit(1);
}
// Get region
console.log('');
console.log('Region options:');
console.log(' AE - United Arab Emirates');
console.log(' AP - Asia Pacific');
console.log(' AU - Australia');
console.log(' CA - Canada');
console.log(' CN - China');
console.log(' DE - Germany');
console.log(' EU - Europe (default)');
console.log(' EU2 - Europe 2');
console.log(' FR - France');
console.log(' JP - Japan');
console.log(' LA - Latin America');
console.log(' RU - Russia');
console.log(' US - United States');
console.log('');
const regionPrompt = `Region [${region}]: `;
let newRegion = (await question(regionPrompt)).toUpperCase() as LibreLinkRegion;
if (!newRegion) {
newRegion = region;
}
if (!VALID_REGIONS.includes(newRegion)) {
console.log(`Invalid region. Must be one of: ${VALID_REGIONS.join(', ')}`);
rl.close();
process.exit(1);
}
// Get target ranges
console.log('');
console.log('Target glucose ranges (mg/dL):');
const lowPrompt = `Target Low [${ranges.targetLow}]: `;
const lowInput = await question(lowPrompt);
const targetLow = lowInput ? parseInt(lowInput, 10) : ranges.targetLow;
const highPrompt = `Target High [${ranges.targetHigh}]: `;
const highInput = await question(highPrompt);
const targetHigh = highInput ? parseInt(highInput, 10) : ranges.targetHigh;
if (targetLow >= targetHigh) {
console.log('Target low must be less than target high');
rl.close();
process.exit(1);
}
// Save configuration
console.log('');
console.log('Saving configuration...');
try {
// Save credentials securely
await configManager.updateCredentials(email, password);
// Save other settings
configManager.updateRegion(newRegion);
configManager.updateRanges(targetLow, targetHigh);
const paths = configManager.getSecureStoragePaths();
console.log('Configuration saved!');
console.log('');
console.log('Storage locations:');
console.log(` Encrypted credentials: ${paths.credentialsPath}`);
console.log(` Encryption key: Stored in OS keychain`);
console.log(` Settings: ${configManager.getConfigPath()}`);
} catch (error) {
console.log(`Failed to save configuration: ${error}`);
rl.close();
process.exit(1);
}
// Test connection
console.log('');
console.log('Testing connection to LibreLinkUp...');
try {
const config = await configManager.getConfig();
const client = new LibreLinkClient(config, configManager);
await client.validateConnection();
console.log('Connection successful!');
const glucose = await client.getCurrentGlucose();
const sessionStatus = client.getSessionStatus();
console.log('');
console.log('Current glucose reading:');
console.log(` Value: ${glucose.value} mg/dL`);
console.log(` Trend: ${glucose.trend}`);
console.log(` Status: ${glucose.color === 'green' ? 'In Range' : glucose.color === 'red' ? 'Critical' : 'Out of Range'}`);
console.log('');
console.log('Session info:');
console.log(` Token valid until: ${sessionStatus.expiresAt?.toLocaleString() || 'N/A'}`);
} catch (error) {
console.log(`Connection failed: ${error}`);
console.log('');
console.log('Troubleshooting:');
console.log(' 1. Verify your email and password are correct');
console.log(' 2. Make sure you are using LibreLinkUp credentials');
console.log(' 3. Open the LibreLinkUp app and accept any Terms & Conditions');
console.log(' 4. Ensure someone is sharing data with you (or share your own data)');
console.log(' 5. Check that your region setting is correct');
rl.close();
process.exit(1);
}
console.log('');
console.log('Configuration complete!');
console.log('');
console.log('Next steps:');
console.log(' 1. Add the server to Claude Desktop configuration');
console.log(' 2. Restart Claude Desktop');
console.log(' 3. Ask Claude about your glucose levels!');
rl.close();
}
main().catch((error) => {
console.error('Error:', error);
process.exit(1);
});
