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* Database Scaffolding Generator
* Generates database configuration and setup files
*/
import { getCLIVersion } from '../utils/version.js';
// Get current CLI version automatically
const cliVersion = getCLIVersion();
/**
* Generate database configuration file
*/
export function generateDatabaseConfig(dbType) {
const configs = {
postgres: `
export const dbConfig = {
host: process.env.DB_HOST || 'localhost',
port: parseInt(process.env.DB_PORT || '5432'),
database: process.env.DB_NAME || 'coherent_db',
user: process.env.DB_USER || 'postgres',
password: process.env.DB_PASSWORD || 'postgres',
// Connection pool settings
pool: {
min: 2,
max: 20,
idleTimeoutMillis: 30000,
connectionTimeoutMillis: 2000,
}
};
`,
mysql: `
export const dbConfig = {
host: process.env.DB_HOST || 'localhost',
port: parseInt(process.env.DB_PORT || '3306'),
database: process.env.DB_NAME || 'coherent_db',
user: process.env.DB_USER || 'root',
password: process.env.DB_PASSWORD || 'password',
// Connection pool settings
pool: {
max: 10,
min: 0,
waitForConnections: true,
queueLimit: 0
}
};
`,
sqlite: `
export const dbConfig = {
filename: process.env.DB_PATH || './data/database.sqlite',
// SQLite options
verbose: process.env.NODE_ENV === 'development'
};
`,
mongodb: `
export const dbConfig = {
uri: process.env.MONGODB_URI || 'mongodb://localhost:27017/coherent_db',
options: {
useNewUrlParser: true,
useUnifiedTopology: true,
serverSelectionTimeoutMS: 5000,
socketTimeoutMS: 45000,
}
};
`
};
return configs[dbType] || '';
}
/**
* Generate database initialization file
*/
export function generateDatabaseInit(dbType, language = 'javascript') {
const isTypeScript = language === 'typescript';
const typeAnnotation = isTypeScript ? ': any' : '';
const returnType = isTypeScript ? ': Promise<any>' : '';
const inits = {
postgres: `
import { setupDatabase } from '@coherent.js/database';
import { dbConfig } from './config.js';
let db${typeAnnotation};
export async function initDatabase()${returnType} {
try {
// Setup database with Coherent.js
db = setupDatabase({
type: 'postgresql',
host: dbConfig.host,
port: dbConfig.port,
database: dbConfig.database,
username: dbConfig.user,
password: dbConfig.password,
pool: dbConfig.pool
});
// Wait for connection
await db.connect();
console.log('✓ Connected to PostgreSQL database');
return db;
} catch (error) {
console.error('Failed to connect to PostgreSQL:', error);
throw error;
}
}
export function getDatabase()${typeAnnotation} {
if (!db) {
throw new Error('Database not initialized. Call initDatabase() first.');
}
return db;
}
// Graceful shutdown
process.on('SIGINT', async () => {
if (db) {
await db.disconnect();
console.log('Database connection closed');
}
process.exit(0);
});
`,
mysql: `
import { setupDatabase } from '@coherent.js/database';
import { dbConfig } from './config.js';
let db${typeAnnotation};
export async function initDatabase()${returnType} {
try {
// Setup database with Coherent.js
db = setupDatabase({
type: 'mysql',
host: dbConfig.host,
port: dbConfig.port,
database: dbConfig.database,
username: dbConfig.user,
password: dbConfig.password,
pool: dbConfig.pool
});
// Wait for connection
await db.connect();
console.log('✓ Connected to MySQL database');
return db;
} catch (error) {
console.error('Failed to connect to MySQL:', error);
throw error;
}
}
export function getDatabase()${typeAnnotation} {
if (!db) {
throw new Error('Database not initialized. Call initDatabase() first.');
}
return db;
}
// Graceful shutdown
process.on('SIGINT', async () => {
if (db) {
await db.disconnect();
console.log('Database connection closed');
}
process.exit(0);
});
`,
sqlite: `
import { setupDatabase } from '@coherent.js/database';
import { dbConfig } from './config.js';
import { mkdirSync } from 'fs';
import { dirname } from 'path';
let db${typeAnnotation};
export async function initDatabase()${returnType} {
try {
// Ensure directory exists for SQLite file
if (dbConfig.filename && dbConfig.filename !== ':memory:') {
mkdirSync(dirname(dbConfig.filename), { recursive: true });
}
// Setup database with Coherent.js
db = setupDatabase({
type: 'sqlite',
database: dbConfig.filename || ':memory:'
});
// Wait for connection
await db.connect();
console.log('✓ Connected to SQLite database');
return db;
} catch (error) {
console.error('Failed to initialize SQLite:', error);
throw error;
}
}
export function getDatabase()${typeAnnotation} {
if (!db) {
throw new Error('Database not initialized. Call initDatabase() first.');
}
return db;
}
// Graceful shutdown
process.on('SIGINT', async () => {
if (db) {
await db.disconnect();
console.log('Database closed');
}
process.exit(0);
});
`,
mongodb: `
import { setupDatabase } from '@coherent.js/database';
import { dbConfig } from './config.js';
let db${typeAnnotation};
export async function initDatabase()${returnType} {
try {
// Setup database with Coherent.js
db = setupDatabase({
type: 'mongodb',
database: dbConfig.uri,
...dbConfig.options
});
// Wait for connection
await db.connect();
console.log('✓ Connected to MongoDB database');
return db;
} catch (error) {
console.error('Failed to connect to MongoDB:', error);
throw error;
}
}
export function getDatabase()${typeAnnotation} {
if (!db) {
throw new Error('Database not initialized. Call initDatabase() first.');
}
return db;
}
// Graceful shutdown
process.on('SIGINT', async () => {
if (db) {
await db.disconnect();
console.log('Database connection closed');
}
process.exit(0);
});
`
};
return inits[dbType] || '';
}
/**
* Generate example model file
*/
export function generateExampleModel(dbType, language = 'javascript') {
const isTypeScript = language === 'typescript';
const typeAnnotation = isTypeScript ? ': Promise<any>' : '';
const interfaceDef = isTypeScript ? `
interface UserData {
email: string;
name: string;
}` : '';
const models = {
postgres: `
import { getDatabase } from '../index.js';
${interfaceDef}
export class UserModel {
static async createTable()${typeAnnotation} {
const db = getDatabase();
await db.query(\`
CREATE TABLE IF NOT EXISTS users (
id SERIAL PRIMARY KEY,
email VARCHAR(255) UNIQUE NOT NULL,
name VARCHAR(255) NOT NULL,
password_hash VARCHAR(255),
created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
)
\`);
}
static async create(userData)${typeAnnotation} {
const db = getDatabase();
const result = await db.query(
'INSERT INTO users (email, name) VALUES ($1, $2) RETURNING *',
[userData.email, userData.name]
);
return result.rows[0];
}
static async findById(id)${typeAnnotation} {
const db = getDatabase();
const result = await db.query('SELECT * FROM users WHERE id = $1', [id]);
return result.rows[0];
}
static async findByEmail(email)${typeAnnotation} {
const db = getDatabase();
const result = await db.query('SELECT * FROM users WHERE email = $1', [email]);
return result.rows[0];
}
static async update(id, data)${typeAnnotation} {
const db = getDatabase();
const result = await db.query(
'UPDATE users SET email = $1, name = $2, updated_at = CURRENT_TIMESTAMP WHERE id = $3 RETURNING *',
[data.email, data.name, id]
);
return result.rows[0];
}
static async delete(id)${typeAnnotation} {
const db = getDatabase();
await db.query('DELETE FROM users WHERE id = $1', [id]);
}
}
`,
mysql: `
import { getDatabase } from '../index.js';
${interfaceDef}
export class UserModel {
static async createTable()${typeAnnotation} {
const db = getDatabase();
await db.query(\`
CREATE TABLE IF NOT EXISTS users (
id INT AUTO_INCREMENT PRIMARY KEY,
email VARCHAR(255) UNIQUE NOT NULL,
name VARCHAR(255) NOT NULL,
password_hash VARCHAR(255),
created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
)
\`);
}
static async create(userData)${typeAnnotation} {
const db = getDatabase();
const result = await db.query(
'INSERT INTO users (email, name) VALUES (?, ?)',
[userData.email, userData.name]
);
return result[0];
}
static async findById(id)${typeAnnotation} {
const db = getDatabase();
const result = await db.query('SELECT * FROM users WHERE id = ?', [id]);
return result[0];
}
static async findByEmail(email)${typeAnnotation} {
const db = getDatabase();
const result = await db.query('SELECT * FROM users WHERE email = ?', [email]);
return result[0];
}
static async update(id, data)${typeAnnotation} {
const db = getDatabase();
const result = await db.query(
'UPDATE users SET email = ?, name = ?, updated_at = CURRENT_TIMESTAMP WHERE id = ?',
[data.email, data.name, id]
);
return result[0];
}
static async delete(id)${typeAnnotation} {
const db = getDatabase();
await db.query('DELETE FROM users WHERE id = ?', [id]);
}
}
`,
sqlite: `
import { getDatabase } from '../index.js';
${interfaceDef}
export class UserModel {
static createTable()${typeAnnotation} {
const db = getDatabase();
db.exec(\`
CREATE TABLE IF NOT EXISTS users (
id INTEGER PRIMARY KEY AUTOINCREMENT,
email TEXT UNIQUE NOT NULL,
name TEXT NOT NULL,
created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
updated_at DATETIME DEFAULT CURRENT_TIMESTAMP
)
\`);
}
static create(data)${typeAnnotation} {
const db = getDatabase();
const stmt = db.prepare('INSERT INTO users (email, name) VALUES (?, ?)');
const result = stmt.run(data.email, data.name);
return { id: result.lastInsertRowid, ...data };
}
static findById(id)${typeAnnotation} {
const db = getDatabase();
const stmt = db.prepare('SELECT * FROM users WHERE id = ?');
return stmt.get(id);
}
static findByEmail(email)${typeAnnotation} {
const db = getDatabase();
const stmt = db.prepare('SELECT * FROM users WHERE email = ?');
return stmt.get(email);
}
static update(id, data)${typeAnnotation} {
const db = getDatabase();
const stmt = db.prepare('UPDATE users SET email = ?, name = ?, updated_at = CURRENT_TIMESTAMP WHERE id = ?');
stmt.run(data.email, data.name, id);
return this.findById(id);
}
static delete(id)${typeAnnotation} {
const db = getDatabase();
const stmt = db.prepare('DELETE FROM users WHERE id = ?');
return stmt.run(id);
}
}
`,
mongodb: `
import { getDatabase } from '../index.js';
${interfaceDef}
export class UserModel {
static async createCollection()${typeAnnotation} {
const db = getDatabase();
await db.createCollection('users');
// Create index for email uniqueness
await db.collection('users').createIndex({ email: 1 }, { unique: true });
}
static async create(userData)${typeAnnotation} {
const db = getDatabase();
const result = await db.collection('users').insertOne(userData);
return { _id: result.insertedId, ...userData };
}
static async findById(id)${typeAnnotation} {
const db = getDatabase();
return await db.collection('users').findOne({ _id: id });
}
static async findByEmail(email)${typeAnnotation} {
const db = getDatabase();
return await db.collection('users').findOne({ email });
}
static async update(id, data)${typeAnnotation} {
const db = getDatabase();
const result = await db.collection('users').updateOne(
{ _id: id },
{ $set: { ...data, updatedAt: new Date() } }
);
return result.modifiedCount > 0 ? this.findById(id) : null;
}
static async delete(id)${typeAnnotation} {
const db = getDatabase();
const result = await db.collection('users').deleteOne({ _id: id });
return result.deletedCount > 0;
}
}
`
};
return models[dbType] || '';
}
/**
* Generate .env.example file for database
*/
export function generateEnvExample(dbType) {
const envs = {
postgres: `# PostgreSQL Database Configuration
DB_HOST=localhost
DB_PORT=5432
DB_NAME=coherent_db
DB_USER=postgres
DB_PASSWORD=postgres
`,
mysql: `# MySQL Database Configuration
DB_HOST=localhost
DB_PORT=3306
DB_NAME=coherent_db
DB_USER=root
DB_PASSWORD=password
`,
sqlite: `# SQLite Database Configuration
DB_PATH=./data/database.sqlite
`,
mongodb: `# MongoDB Configuration
MONGODB_URI=mongodb://localhost:27017/coherent_db
`
};
return envs[dbType] || '';
}
/**
* Get database-specific dependencies
*/
export function getDatabaseDependencies(dbType) {
const deps = {
postgres: {
pg: '^8.12.0',
'@coherent.js/database': `^${cliVersion}`
},
mysql: {
'mysql2': '^3.11.0',
'@coherent.js/database': `^${cliVersion}`
},
sqlite: {
'better-sqlite3': '^11.3.0',
'@coherent.js/database': `^${cliVersion}`
},
mongodb: {
mongodb: '^6.9.0',
'@coherent.js/database': `^${cliVersion}`
}
};
return deps[dbType] || {};
}
/**
* Generate complete database scaffolding
*/
export function generateDatabaseScaffolding(dbType, language = 'javascript') {
return {
config: generateDatabaseConfig(dbType),
init: generateDatabaseInit(dbType, language),
model: generateExampleModel(dbType, language),
env: generateEnvExample(dbType),
dependencies: getDatabaseDependencies(dbType)
};
}
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