query - basic print workflow - messages on client

packages/api/src/controllers/sessions.js

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+const _ = require('lodash');
+const uuidv1 = require('uuid/v1');
+const connections = require('./connections');
+const socket = require('../utility/socket');
+const { fork } = require('child_process');
+const DatabaseAnalyser = require('@dbgate/engines/default/DatabaseAnalyser');
+
+module.exports = {
+  /** @type {import('@dbgate/types').OpenedSession[]} */
+  opened: [],
+
+  handle_error(sesid, props) {
+    const { error } = props;
+    console.log(`Error in database session ${sesid}: ${error}`);
+  },
+
+  // handle_row(sesid, props) {
+  //   const { row } = props;
+  //   socket.emit('sessionRow', row);
+  // },
+
+  handle_info(sesid, props) {
+    const { info } = props;
+    socket.emit(`session-info-${sesid}`, info);
+  },
+
+  create_meta: 'post',
+  async create({ conid, database }) {
+    const sesid = uuidv1();
+    const connection = await connections.get({ conid });
+    const subprocess = fork(process.argv[1], ['sessionProcess']);
+    const newOpened = {
+      conid,
+      database,
+      subprocess,
+      connection,
+      sesid,
+    };
+    this.opened.push(newOpened);
+    // @ts-ignore
+    subprocess.on('message', ({ msgtype, ...message }) => {
+      this[`handle_${msgtype}`](sesid, message);
+    });
+    subprocess.send({ msgtype: 'connect', ...connection, database });
+    return newOpened;
+  },
+
+  executeQuery_meta: 'post',
+  async executeQuery({ sesid, sql }) {
+    const session = this.opened.find((x) => x.sesid == sesid);
+    if (!session) {
+      throw new Error('Invalid session');
+    }
+
+    console.log(`Processing query, sesid=${sesid}, sql=${sql}`);
+    session.subprocess.send({ msgtype: 'executeQuery', sql });
+
+    return { state: 'ok' };
+  },
+
+  // runCommand_meta: 'post',
+  // async runCommand({ conid, database, sql }) {
+  //   console.log(`Running SQL command , conid=${conid}, database=${database}, sql=${sql}`);
+  //   const opened = await this.ensureOpened(conid, database);
+  //   const res = await this.sendRequest(opened, { msgtype: 'queryData', sql });
+  //   return res;
+  // },
+};