engines moved to separate library

lib/engines/postgres/index.js

@@ -0,0 +1,43 @@
+const PostgreAnalyser = require('./PostgreAnalyser');
+const PostgreDumper = require('./PostgreDumper');
+
+/** @type {import('dbgate').SqlDialect} */
+const dialect = {
+  rangeSelect: true,
+  quoteIdentifier(s) {
+    return '"' + s + '"';
+  },
+};
+
+/** @type {import('dbgate').EngineDriver} */
+const driver = {
+  async connect({pg}, { server, port, user, password, database }) {
+    const client = new pg.Client({ host: server, port, user, password, database: database || 'postgres' });
+    await client.connect();
+    return client;
+  },
+  async query(client, sql) {
+    const res = await client.query(sql);
+    return { rows: res.rows, columns: res.fields };
+  },
+  async getVersion(client) {
+    const { rows } = await this.query(client, 'SELECT version()');
+    const { version } = rows[0];
+    return { version };
+  },
+  async analyseFull(pool) {
+    const analyser = new PostgreAnalyser(pool, this);
+    await analyser.runAnalysis();
+    return analyser.result;
+  },
+  createDumper() {
+    return new PostgreDumper(this);
+  },
+  async listDatabases(client) {
+    const { rows } = await this.query(client, 'SELECT datname AS name FROM pg_database WHERE datistemplate = false');
+    return rows;
+  },
+  dialect,
+};
+
+module.exports = driver;