552 lines
18 KiB
JavaScript
552 lines
18 KiB
JavaScript
require('dotenv').config();
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const express = require('express');
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const { Pool } = require('pg');
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const session = require('express-session');
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const cors = require('cors');
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const path = require('path');
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const app = express();
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// Middleware
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app.use(cors());
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app.use(express.json());
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app.use(express.static('.'));
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// Session configuration
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app.use(session({
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secret: process.env.SESSION_SECRET || 'default-secret-change-this',
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resave: false,
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saveUninitialized: false,
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cookie: { secure: false } // Set to true if using HTTPS
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}));
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// Database connection pool (uses .env configuration)
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const pool = new Pool({
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host: process.env.DB_HOST,
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port: process.env.DB_PORT,
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database: process.env.DB_NAME,
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user: process.env.DB_USER,
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password: process.env.DB_PASSWORD,
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});
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// Test database connection on startup
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pool.connect((err, client, release) => {
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if (err) {
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console.error('❌ Error connecting to PostgreSQL:', err.message);
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console.log('Проверьте настройки в .env файле');
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} else {
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console.log('✅ Connected to PostgreSQL database');
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console.log(` Host: ${process.env.DB_HOST}:${process.env.DB_PORT}`);
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console.log(` Database: ${process.env.DB_NAME}`);
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release();
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}
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});
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// Helper: get primary key column for a table (returns null if none)
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async function getPrimaryKeyColumn(tableName) {
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const result = await pool.query(`
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SELECT kcu.column_name
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FROM information_schema.table_constraints tc
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JOIN information_schema.key_column_usage kcu
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ON tc.constraint_name = kcu.constraint_name
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AND tc.table_schema = kcu.table_schema
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WHERE tc.constraint_type = 'PRIMARY KEY'
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AND tc.table_name = $1
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AND tc.table_schema = 'public'
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LIMIT 1
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`, [tableName]);
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return result.rows[0]?.column_name || null;
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}
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// Middleware to check if user is authenticated
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const requireAuth = (req, res, next) => {
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if (req.session && req.session.authenticated) {
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next();
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} else {
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res.status(401).json({ error: 'Unauthorized' });
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}
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};
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// Login endpoint - checks admin credentials from .env
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app.post('/api/login', async (req, res) => {
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const { username, password } = req.body;
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// Check against .env credentials
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if (username === process.env.ADMIN_USERNAME && password === process.env.ADMIN_PASSWORD) {
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// Test database connection
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try {
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const client = await pool.connect();
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const result = await client.query('SELECT NOW() as time');
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client.release();
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req.session.authenticated = true;
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req.session.username = username;
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res.json({
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success: true,
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message: 'Login successful',
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dbInfo: {
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host: process.env.DB_HOST,
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port: process.env.DB_PORT,
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database: process.env.DB_NAME,
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connected: true,
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serverTime: result.rows[0].time
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}
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});
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} catch (err) {
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res.status(500).json({
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success: false,
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error: 'Database connection failed',
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details: err.message
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});
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}
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} else {
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res.status(401).json({
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success: false,
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error: 'Invalid credentials'
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});
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}
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});
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// Logout
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app.post('/api/logout', (req, res) => {
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req.session.destroy();
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res.json({ success: true });
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});
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// Check session
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app.get('/api/session', (req, res) => {
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if (req.session.authenticated) {
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res.json({
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authenticated: true,
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username: req.session.username,
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dbInfo: {
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host: process.env.DB_HOST,
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port: process.env.DB_PORT,
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database: process.env.DB_NAME
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}
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});
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} else {
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res.json({ authenticated: false });
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}
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});
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// Get all tables
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app.get('/api/tables', requireAuth, async (req, res) => {
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try {
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const result = await pool.query(`
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SELECT
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table_name as name,
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(SELECT COUNT(*) FROM information_schema.columns WHERE table_name = t.table_name) as column_count
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FROM information_schema.tables t
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WHERE table_schema = 'public'
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ORDER BY table_name
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`);
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// Get row counts for each table
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const tablesWithCounts = await Promise.all(
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result.rows.map(async (table) => {
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try {
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const countResult = await pool.query(`SELECT COUNT(*) as count FROM "${table.name}"`);
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return {
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...table,
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rows: parseInt(countResult.rows[0].count),
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size: 'calculating...' // Would need pg_size_pretty for real size
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};
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} catch (e) {
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return { ...table, rows: 0, size: '0 KB' };
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}
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})
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);
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res.json(tablesWithCounts);
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} catch (err) {
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res.status(500).json({ error: err.message });
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}
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});
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// Get table data with pagination, search, filters and sort
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app.get('/api/tables/:tableName/data', requireAuth, async (req, res) => {
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const { tableName } = req.params;
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const page = parseInt(req.query.page) || 1;
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const limit = parseInt(req.query.limit) || 10;
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const search = req.query.search || '';
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const filters = req.query.filters ? JSON.parse(req.query.filters) : [];
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const sortColumn = req.query.sortColumn || '';
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const sortDirection = req.query.sortDirection || 'ASC';
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const offset = (page - 1) * limit;
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try {
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let whereClause = '';
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let params = [limit, offset];
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let paramIndex = 3; // $1=limit, $2=offset, $3+ for conditions
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// Search
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if (search) {
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const columnsResult = await pool.query(`
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SELECT column_name
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FROM information_schema.columns
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WHERE table_name = $1 AND table_schema = 'public'
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ORDER BY ordinal_position
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`, [tableName]);
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const columns = columnsResult.rows.map(row => row.column_name);
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const searchConditions = columns.map(col => `CAST("${col}" AS TEXT) ILIKE $${paramIndex}`).join(' OR ');
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whereClause = `WHERE ${searchConditions}`;
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params.push(`%${search}%`);
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paramIndex++;
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}
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// Filters
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if (filters.length > 0) {
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const filterConditions = filters.map(filter => {
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const { column, operator, value } = filter;
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let condition = '';
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switch (operator) {
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case '=':
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condition = `"${column}" = $${paramIndex}`;
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params.push(value);
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paramIndex++;
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break;
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case '!=':
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condition = `"${column}" != $${paramIndex}`;
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params.push(value);
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paramIndex++;
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break;
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case '>':
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condition = `"${column}" > $${paramIndex}`;
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params.push(value);
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paramIndex++;
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break;
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case '<':
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condition = `"${column}" < $${paramIndex}`;
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params.push(value);
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paramIndex++;
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break;
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case '>=':
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condition = `"${column}" >= $${paramIndex}`;
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params.push(value);
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paramIndex++;
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break;
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case '<=':
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condition = `"${column}" <= $${paramIndex}`;
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params.push(value);
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paramIndex++;
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break;
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case 'LIKE':
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condition = `"${column}" LIKE $${paramIndex}`;
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params.push(`%${value}%`);
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paramIndex++;
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break;
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case 'ILIKE':
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condition = `"${column}" ILIKE $${paramIndex}`;
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params.push(`%${value}%`);
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paramIndex++;
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break;
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case 'IS NULL':
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condition = `"${column}" IS NULL`;
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break;
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case 'IS NOT NULL':
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condition = `"${column}" IS NOT NULL`;
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break;
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}
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return condition;
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}).filter(c => c).join(' AND ');
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whereClause = whereClause ? `${whereClause} AND ${filterConditions}` : `WHERE ${filterConditions}`;
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}
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// Get total count
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const countResult = await pool.query(`SELECT COUNT(*) as total FROM "${tableName}" ${whereClause}`, params.slice(2));
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const total = parseInt(countResult.rows[0].total);
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// Build ORDER BY
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let orderBy = 'ORDER BY (SELECT NULL)'; // Default no order
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if (sortColumn) {
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orderBy = `ORDER BY "${sortColumn}" ${sortDirection}`;
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}
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// Get data
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const result = await pool.query(`
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SELECT * FROM "${tableName}"
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${whereClause}
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${orderBy}
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LIMIT $1 OFFSET $2
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`, params);
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res.json({
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data: result.rows,
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total,
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page,
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limit,
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totalPages: Math.ceil(total / limit)
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});
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} catch (err) {
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res.status(500).json({ error: err.message });
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}
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});
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// Get table structure
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app.get('/api/tables/:tableName/structure', requireAuth, async (req, res) => {
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const { tableName } = req.params;
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try {
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const result = await pool.query(`
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SELECT
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c.column_name as name,
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c.data_type as type,
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c.is_nullable as nullable,
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c.column_default as default_value,
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CASE WHEN kcu.column_name IS NOT NULL THEN true ELSE false END as is_primary
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FROM information_schema.columns c
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LEFT JOIN information_schema.table_constraints tc
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ON tc.table_name = c.table_name
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AND tc.table_schema = c.table_schema
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AND tc.constraint_type = 'PRIMARY KEY'
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LEFT JOIN information_schema.key_column_usage kcu
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ON kcu.constraint_name = tc.constraint_name
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AND kcu.table_schema = tc.table_schema
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AND kcu.column_name = c.column_name
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WHERE c.table_name = $1 AND c.table_schema = 'public'
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ORDER BY c.ordinal_position
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`, [tableName]);
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res.json(result.rows);
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} catch (err) {
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res.status(500).json({ error: err.message });
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}
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});
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// Create table
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app.post('/api/tables', requireAuth, async (req, res) => {
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const { name, columns } = req.body;
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try {
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let columnsSQL = columns.map(col => {
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let def = `"${col.name}" ${col.type}`;
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if (col.pk) def += ' PRIMARY KEY';
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if (!col.nullable && !col.pk) def += ' NOT NULL';
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return def;
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}).join(', ');
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const sql = `CREATE TABLE "${name}" (${columnsSQL})`;
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await pool.query(sql);
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res.json({ success: true, message: 'Table created' });
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} catch (err) {
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res.status(500).json({ error: err.message });
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}
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});
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// Delete table
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app.delete('/api/tables/:tableName', requireAuth, async (req, res) => {
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const { tableName } = req.params;
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try {
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await pool.query(`DROP TABLE IF EXISTS "${tableName}"`);
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res.json({ success: true, message: 'Table deleted' });
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} catch (err) {
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res.status(500).json({ error: err.message });
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}
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});
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// Insert record
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app.post('/api/tables/:tableName/records', requireAuth, async (req, res) => {
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const { tableName } = req.params;
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const data = req.body;
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const columns = Object.keys(data);
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const values = Object.values(data);
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const placeholders = values.map((_, i) => `$${i + 1}`).join(', ');
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try {
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const sql = `INSERT INTO "${tableName}" (${columns.map(c => `"${c}"`).join(', ')}) VALUES (${placeholders}) RETURNING *`;
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const result = await pool.query(sql, values);
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res.json({ success: true, data: result.rows[0] });
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} catch (err) {
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res.status(500).json({ error: err.message });
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}
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});
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// Update record
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app.put('/api/tables/:tableName/records/:pk', requireAuth, async (req, res) => {
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const { tableName, pk } = req.params;
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const data = req.body;
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const columns = Object.keys(data);
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const values = Object.values(data);
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const setClause = columns.map((col, i) => `"${col}" = $${i + 1}`).join(', ');
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try {
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const primaryKey = await getPrimaryKeyColumn(tableName) || 'id';
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const sql = `UPDATE "${tableName}" SET ${setClause} WHERE "${primaryKey}" = $${values.length + 1} RETURNING *`;
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const result = await pool.query(sql, [...values, pk]);
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res.json({ success: true, data: result.rows[0] });
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} catch (err) {
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res.status(500).json({ error: err.message });
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}
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});
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// Delete record
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app.delete('/api/tables/:tableName/records/:pk', requireAuth, async (req, res) => {
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const { tableName, pk } = req.params;
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try {
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const primaryKey = await getPrimaryKeyColumn(tableName) || 'id';
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await pool.query(`DELETE FROM "${tableName}" WHERE "${primaryKey}" = $1`, [pk]);
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res.json({ success: true });
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} catch (err) {
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res.status(500).json({ error: err.message });
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}
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});
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// Add a new column
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app.post('/api/tables/:tableName/columns', requireAuth, async (req, res) => {
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const { tableName } = req.params;
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const { name, type, nullable = true, defaultValue, primaryKey } = req.body;
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if (!name || !type) {
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return res.status(400).json({ error: 'Column name and type are required' });
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}
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const parts = [`"${name}" ${type}`];
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if (primaryKey) parts.push('PRIMARY KEY');
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if (!nullable) parts.push('NOT NULL');
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if (defaultValue !== undefined && defaultValue !== null && defaultValue !== '') {
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parts.push(`DEFAULT ${defaultValue}`);
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}
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try {
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await pool.query(`ALTER TABLE "${tableName}" ADD COLUMN ${parts.join(' ')}`);
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res.json({ success: true });
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} catch (err) {
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res.status(500).json({ error: err.message });
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}
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});
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// Modify an existing column
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app.put('/api/tables/:tableName/columns/:columnName', requireAuth, async (req, res) => {
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const { tableName, columnName } = req.params;
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const { type, nullable, defaultValue } = req.body;
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try {
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if (type) {
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await pool.query(`ALTER TABLE "${tableName}" ALTER COLUMN "${columnName}" TYPE ${type}`);
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}
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if (typeof nullable === 'boolean') {
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const nullSql = nullable ? 'DROP NOT NULL' : 'SET NOT NULL';
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await pool.query(`ALTER TABLE "${tableName}" ALTER COLUMN "${columnName}" ${nullSql}`);
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}
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if (defaultValue !== undefined) {
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if (defaultValue === null || defaultValue === '') {
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await pool.query(`ALTER TABLE "${tableName}" ALTER COLUMN "${columnName}" DROP DEFAULT`);
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} else {
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await pool.query(`ALTER TABLE "${tableName}" ALTER COLUMN "${columnName}" SET DEFAULT ${defaultValue}`);
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}
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}
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res.json({ success: true });
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} catch (err) {
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res.status(500).json({ error: err.message });
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}
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});
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// Drop a column
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app.delete('/api/tables/:tableName/columns/:columnName', requireAuth, async (req, res) => {
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const { tableName, columnName } = req.params;
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try {
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await pool.query(`ALTER TABLE "${tableName}" DROP COLUMN IF EXISTS "${columnName}"`);
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res.json({ success: true });
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} catch (err) {
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res.status(500).json({ error: err.message });
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}
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});
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// Execute SQL
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app.post('/api/query', requireAuth, async (req, res) => {
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const { sql } = req.body;
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try {
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const result = await pool.query(sql);
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res.json({
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success: true,
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rows: result.rows,
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rowCount: result.rowCount,
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command: result.command
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});
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} catch (err) {
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res.status(500).json({ error: err.message });
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}
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});
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// Get indexes
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app.get('/api/tables/:tableName/indexes', requireAuth, async (req, res) => {
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const { tableName } = req.params;
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try {
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const result = await pool.query(`
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SELECT
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indexname as name,
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indexdef as definition
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FROM pg_indexes
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WHERE tablename = $1
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`, [tableName]);
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const indexes = result.rows.map(row => ({
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name: row.name,
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columns: row.definition.match(/\((.*?)\)/)?.[1] || 'unknown',
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unique: row.definition.includes('UNIQUE'),
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type: 'btree'
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}));
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res.json(indexes);
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} catch (err) {
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res.status(500).json({ error: err.message });
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}
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});
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// Create index
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app.post('/api/tables/:tableName/indexes', requireAuth, async (req, res) => {
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const { tableName } = req.params;
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const { name, columns, unique } = req.body;
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try {
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const uniqueStr = unique ? 'UNIQUE' : '';
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const sql = `CREATE ${uniqueStr} INDEX "${name}" ON "${tableName}" (${columns})`;
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await pool.query(sql);
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res.json({ success: true });
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} catch (err) {
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res.status(500).json({ error: err.message });
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}
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});
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// Drop index
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app.delete('/api/indexes/:indexName', requireAuth, async (req, res) => {
|
|
const { indexName } = req.params;
|
|
|
|
try {
|
|
await pool.query(`DROP INDEX IF EXISTS "${indexName}"`);
|
|
res.json({ success: true });
|
|
} catch (err) {
|
|
res.status(500).json({ error: err.message });
|
|
}
|
|
});
|
|
|
|
// Start server
|
|
const PORT = process.env.PORT || 3000;
|
|
app.listen(PORT, () => {
|
|
console.log(`🚀 Server running on http://localhost:${PORT}`);
|
|
console.log('');
|
|
console.log('🔑 Default login credentials:');
|
|
console.log(` Username: ${process.env.ADMIN_USERNAME || 'admin'}`);
|
|
console.log(` Password: ${process.env.ADMIN_PASSWORD || 'admin'}`);
|
|
console.log('');
|
|
console.log('📝 Make sure to configure your database in .env file');
|
|
});
|