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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 | /** * SQLite Database Adapter for Coherent.js * * @fileoverview SQLite adapter implementation with connection pooling and transaction support. */ /** * Create a new SQLite adapter instance * * @returns {Object} SQLite adapter instance with database operations */ export function createSQLiteAdapter() { let sqlite3 = null; let db = null; /** * Initialize SQLite module * * @private * @returns {Promise<void>} */ async function initializeSQLite() { if (!sqlite3) { try { // Try to import sqlite3 (peer dependency) const sqlite3Module = await import('sqlite3'); sqlite3 = sqlite3Module.default || sqlite3Module; } catch { throw new Error('Failed to load sqlite3 module. Make sure to install it: npm install sqlite3'); } } } /** * Connect to the database * * @param {Object} config - Database configuration * @param {string} config.database - Path to the SQLite database file * @param {boolean} [config.readonly=false] - Open the database in read-only mode * @returns {Promise<Object>} The database adapter instance */ async function connect(config) { await initializeSQLite(); return new Promise((resolve, reject) => { try { db = new sqlite3.Database( config.database, config.readonly ? sqlite3.OPEN_READONLY : sqlite3.OPEN_READWRITE | sqlite3.OPEN_CREATE, (err) => { if (err) { return reject(new Error(`Failed to connect to SQLite database: ${err.message}`)); } // Enable foreign keys by default db.run('PRAGMA foreign_keys = ON'); // Enable WAL mode for better concurrency db.run('PRAGMA journal_mode = WAL'); // Set busy timeout to handle concurrent write operations db.run('PRAGMA busy_timeout = 5000'); resolve(instance); } ); } catch (error) { reject(new Error(`Failed to connect to SQLite database: ${error.message}`)); } }); } /** * Execute a SQL query * * @param {string} sql - SQL query string * @param {Array} [params=[]] - Query parameters * @returns {Promise<{rows: Array<Object>}>} Query result */ function query(sql, params = []) { return new Promise((resolve, reject) => { if (!db) { return reject(new Error('Database connection not established. Call connect() first.')); } db.all(sql, params, (err, rows) => { if (err) { return reject(new Error(`SQLite query error: ${err.message}`)); } resolve({ rows }); }); }); } /** * Execute a SQL statement * * @param {string} sql - SQL statement * @param {Array} [params=[]] - Statement parameters * @returns {Promise<{affectedRows: number, insertId: number}>} Execution result */ function execute(sql, params = []) { return new Promise((resolve, reject) => { if (!db) { return reject(new Error('Database connection not established. Call connect() first.')); } db.run(sql, params, function(err) { if (err) { return reject(new Error(`SQLite execute error: ${err.message}`)); } resolve({ affectedRows: this.changes, insertId: this.lastID }); }); }); } /** * Begin a transaction * * @returns {Promise<void>} */ function beginTransaction() { return new Promise((resolve, reject) => { if (!db) { return reject(new Error('Database connection not established. Call connect() first.')); } db.run('BEGIN TRANSACTION', (err) => { if (err) { return reject(new Error(`Failed to begin transaction: ${err.message}`)); } resolve(); }); }); } /** * Commit a transaction * * @returns {Promise<void>} */ function commit() { return new Promise((resolve, reject) => { if (!db) { return reject(new Error('Database connection not established. Call connect() first.')); } db.run('COMMIT', (err) => { if (err) { return reject(new Error(`Failed to commit transaction: ${err.message}`)); } resolve(); }); }); } /** * Rollback a transaction * * @returns {Promise<void>} */ function rollback() { return new Promise((resolve, reject) => { if (!db) { return reject(new Error('Database connection not established. Call connect() first.')); } db.run('ROLLBACK', (err) => { if (err) { return reject(new Error(`Failed to rollback transaction: ${err.message}`)); } resolve(); }); }); } /** * Disconnect from the database * * @returns {Promise<void>} */ function disconnect() { return new Promise((resolve, reject) => { if (!db) { return resolve(); } db.close((err) => { if (err) { return reject(new Error(`Failed to close database connection: ${err.message}`)); } db = null; resolve(); }); }); } /** * Get the underlying database connection * * @returns {Object} The database connection */ function getConnection() { if (!db) { throw new Error('Database connection not established. Call connect() first.'); } return db; } /** * Ping the database to check if connection is alive * * @returns {Promise<boolean>} True if connection is alive */ async function ping() { try { await query('SELECT 1'); return true; } catch { return false; } } /** * Escape a value for SQL queries * * @param {*} value - Value to escape * @returns {string} Escaped value */ function escape(value) { if (value === null || value === undefined) { return 'NULL'; } if (typeof value === 'boolean') { return value ? '1' : '0'; } if (typeof value === 'number') { return String(value); } // Escape single quotes by doubling them return `'${String(value).replace(/'/g, "''")}'`; } // Public API const instance = { connect, query, execute, beginTransaction, commit, rollback, disconnect, getConnection, ping, escape, // Alias for backward compatibility run: execute }; return instance; } // For backward compatibility export const SQLiteAdapter = { create: createSQLiteAdapter }; |