engines moved to separate library

lib/engines/mysql/index.js

@@ -0,0 +1,56 @@
+const MySqlAnalyser = require("./MySqlAnalyser");
+const MySqlDumper = require("./MySqlDumper");
+
+/** @type {import('dbgate').SqlDialect} */
+const dialect = {
+  rangeSelect: true,
+  quoteIdentifier(s) {
+    return "`" + s + "`";
+  }
+};
+
+/** @type {import('dbgate').EngineDriver} */
+const driver = {
+  async connect({ mysql }, { server, port, user, password, database }) {
+    const connection = mysql.createConnection({
+      host: server,
+      port,
+      user,
+      password,
+      database
+    });
+    connection._database_name = database;
+    return connection;
+  },
+  async query(connection, sql) {
+    return new Promise((resolve, reject) => {
+      connection.query(sql, function(error, results, fields) {
+        if (error) reject(error);
+        resolve({ rows: results, columns: fields });
+      });
+    });
+  },
+  async getVersion(connection) {
+    const { rows } = await this.query(
+      connection,
+      "show variables like 'version'"
+    );
+    const version = rows[0].Value;
+    return { version };
+  },
+  async analyseFull(pool) {
+    const analyser = new MySqlAnalyser(pool, this);
+    await analyser.runAnalysis();
+    return analyser.result;
+  },
+  async listDatabases(connection) {
+    const { rows } = await this.query(connection, "show databases");
+    return rows.map(x => ({ name: x.Database }));
+  },
+  createDumper() {
+    return new MySqlDumper(this);
+  },
+  dialect
+};
+
+module.exports = driver;