Initial Backend Structure

path-finder-backend/app.js

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+const express = require("express");
+const cors = require("cors");
+const app = express();
+
+app.use(cors());
+app.use(express.json()); // for parsing application/json
+
+// Routes
+// const indexRouter = require("./routes/index");
+const botRouter = require("./routes/botRoutes");
+
+// app.use("/", indexRouter);
+app.use("/bot", botRouter);
+
+// Error handler
+app.use((err, req, res, next) => {
+  console.error(err.stack);
+  res.status(500).json({ error: "Something broke!" });
+});
+
+module.exports = app;

path-finder-backend/bin/www

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+#!/usr/bin/env node
+
+/**
+ * Module dependencies.
+ */
+
+var app = require('../app');
+var debug = require('debug')('path-finder-backend:server');
+var http = require('http');
+
+/**
+ * Get port from environment and store in Express.
+ */
+
+var port = normalizePort(process.env.PORT || '3000');
+app.set('port', port);
+
+/**
+ * Create HTTP server.
+ */
+
+var server = http.createServer(app);
+
+/**
+ * Listen on provided port, on all network interfaces.
+ */
+
+server.listen(port);
+server.on('error', onError);
+server.on('listening', onListening);
+
+/**
+ * Normalize a port into a number, string, or false.
+ */
+
+function normalizePort(val) {
+  var port = parseInt(val, 10);
+
+  if (isNaN(port)) {
+    // named pipe
+    return val;
+  }
+
+  if (port >= 0) {
+    // port number
+    return port;
+  }
+
+  return false;
+}
+
+/**
+ * Event listener for HTTP server "error" event.
+ */
+
+function onError(error) {
+  if (error.syscall !== 'listen') {
+    throw error;
+  }
+
+  var bind = typeof port === 'string'
+    ? 'Pipe ' + port
+    : 'Port ' + port;
+
+  // handle specific listen errors with friendly messages
+  switch (error.code) {
+    case 'EACCES':
+      console.error(bind + ' requires elevated privileges');
+      process.exit(1);
+      break;
+    case 'EADDRINUSE':
+      console.error(bind + ' is already in use');
+      process.exit(1);
+      break;
+    default:
+      throw error;
+  }
+}
+
+/**
+ * Event listener for HTTP server "listening" event.
+ */
+
+function onListening() {
+  var addr = server.address();
+  var bind = typeof addr === 'string'
+    ? 'pipe ' + addr
+    : 'port ' + addr.port;
+  debug('Listening on ' + bind);
+}

path-finder-backend/controllers/bot.controller.js

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+const { json } = require("express");
+
+exports.testApiEndpoint = (req, res) => {
+  res.json("Hello<3");
+};
+
+exports.getCoordinatesList = (req, res) => {
+  List = [
+    { x: 0, y: 0 },
+    { x: 0, y: 1 },
+    { x: 0, y: 2 },
+    { x: 1, y: 0 },
+    { x: 1, y: 1 },
+    { x: 1, y: 2 },
+    { x: 2, y: 0 },
+    { x: 2, y: 1 },
+    { x: 2, y: 2 },
+  ];
+
+  jsonResponse = { List: List };
+  res.json(jsonResponse);
+};
+
+exports.recordCoordinate = (req, res) => {};