Setup Authentication and Database Dependencies: better-auth and PostgreSQL Integration

.env.example

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+# Database Configuration
+DB_USER=your_database_user
+DB_PASSWORD=your_database_password
+DB_HOST=localhost
+DB_PORT=5432
+DB_NAME=jobit_db
+
+# Better Auth Configuration
+AUTH_SECRET=your_auth_secret_key
+JWT_SECRET=your_jwt_secret_key
+
+# Optional: Additional environment-specific settings
+NODE_ENV=development

__tests__/dependencies.test.ts

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+import { describe, it, expect } from 'vitest';
+import { Pool } from 'pg';
+import { AuthConfig } from 'better-auth';
+
+describe('Dependencies', () => {
+  it('should import PostgreSQL pool', () => {
+    const pool = new Pool();
+    expect(pool).toBeDefined();
+  });
+
+  it('should import better-auth configuration', () => {
+    const authConfig: AuthConfig = {
+      jwtSecret: 'test_secret',
+      tokenExpiration: '1h',
+    };
+    expect(authConfig).toBeDefined();
+    expect(authConfig.jwtSecret).toBe('test_secret');
+  });
+});

config/auth.ts

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+import { AuthConfig } from 'better-auth';
+
+const authConfig: AuthConfig = {
+  jwtSecret: process.env.JWT_SECRET || 'fallback_secret_key',
+  tokenExpiration: '1h', // Token expires in 1 hour
+  refreshTokenExpiration: '7d', // Refresh token expires in 7 days
+
+  // Additional authentication strategies can be configured here
+  strategies: {
+    local: {
+      usernameField: 'email',
+      passwordField: 'password',
+    },
+  },
+
+  // Optional: Password complexity requirements
+  passwordValidation: {
+    minLength: 8,
+    requireUppercase: true,
+    requireLowercase: true,
+    requireNumbers: true,
+    requireSpecialChars: true,
+  },
+};
+
+export default authConfig;

config/postgres.ts

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+import { Pool } from 'pg';
+
+// PostgreSQL connection configuration
+const pool = new Pool({
+  user: process.env.DB_USER || 'defaultuser',
+  host: process.env.DB_HOST || 'localhost',
+  database: process.env.DB_NAME || 'jobit_db',
+  password: process.env.DB_PASSWORD || '',
+  port: parseInt(process.env.DB_PORT || '5432', 10),
+});
+
+// Function to get a database client
+export const getDbClient = async () => {
+  try {
+    const client = await pool.connect();
+    return client;
+  } catch (error) {
+    console.error('Error connecting to the database:', error);
+    throw error;
+  }
+};
+
+// Function to execute a query
+export const executeQuery = async (query: string, params?: any[]) => {
+  const client = await getDbClient();
+  try {
+    const result = await client.query(query, params);
+    client.release();
+    return result;
+  } catch (error) {
+    client.release();
+    console.error('Error executing query:', error);
+    throw error;
+  }
+};