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shrimp-embankment-server
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# Logs
logs
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yarn-debug.log*
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# tambak server
### this is a node express js server that receive data from esp-01 and send it ti flutter app using socket io
![alt text](image.png)
![alt text](image-1.png)

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const mysql = require('mysql');
const dotenv = require('dotenv');
dotenv.config();
// Connect to the MySQL database
const connection = mysql.createConnection({
host: process.env.DB_HOST,
user: process.env.DB_USER,
password: process.env.DB_PASS,
database: process.env.DB_NAME
});
// connection.connect((err) => {
// if (err) {
// console.error('Error connecting to MySQL database: ' + err.stack);
// return;
// }
// console.log('Connected to MySQL database as id ' + connection.threadId);
// })
module.exports = {connection}

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const express = require('express');
const http = require('http');
const cors = require('cors');
const dotenv = require('dotenv');
const socket = require('./socket');
const app = express();
const server = http.createServer(app);
const io = socket.init(server);
const iosend = socket.getIO();
const conn = require('./conn.js');
const connection = conn.connection;
dotenv.config();
app.use(express.json());
app.use(express.urlencoded({ extended: true }));
// app.use(fileUpload());
app.options('*', cors());
app.use(cors());
async function insert_data(water_height, status) {
const query_insert = 'INSERT INTO tb_data (water_height, status) VALUES (?, ?)';
const result_insert = await new Promise((resolve, reject) => {
connection.query(query_insert, [water_height, status], (err, result) => {
if (err) {
reject(err);
} else {
resolve(result);
}
});
})
}
app.post('/', async (req, res) => {
var data = req.body;
try {
const query_search = 'Select * from tb_data';
const result_search = await new Promise((resolve, reject) => {
connection.query(query_search, (err, result) => {
if (err) {
reject(err);
} else {
resolve(result);
}
});
})
var now = new Date();
const status = data.danger_level == 1 ? 2 : data.warning_level == 1 ? 1 : 0;
if (result_search.length > 0) {
const last_data = result_search[result_search.length - 1];
var converted_time_last = new Date(last_data.created_at);
now = now.getTime();
converted_time_last = converted_time_last.getTime();
var differenceInSeconds = (now - converted_time_last) / 1000;
console.log(differenceInSeconds, "second");
const thresholds = {
2: 30,
1: 60,
default: 120
};
const threshold = thresholds[status] || thresholds.default;
if (differenceInSeconds > threshold) {
insert_data(data.water_height, status);
}
} else {
insert_data(data.water_height, status);
}
console.log(data);
io.emit('data', data);
res.status(200).json({ message: 'success', data: data });
} catch (error) {
console.log("ini error post", error);
res.status(500).json({ message: 'Internal server error' });
}
})
app.get('/', async (req, res) => {
const date = req.query.date;
console.log(date, "ini di get");
const query_search = date == null
? 'SELECT * FROM tb_data ORDER BY created_at DESC LIMIT 20'
: 'SELECT * FROM tb_data WHERE created_at LIKE "%' + date + '%" ORDER BY created_at DESC';
const result_search = await new Promise((resolve, reject) => {
connection.query(query_search, (err, result) => {
if (err) {
reject(err);
} else {
resolve(result);
}
});
})
res.status(200).json({ message: 'success', data: result_search });
})
// app error handler
app.use((err, req, res, next) => {
console.log(err);
res.status(500).send('Something broke!');
});
io.on('connection', (socket) => {
let userID = socket.id;
console.log('A user connected: ' + userID);
socket.on('scan_dia', (data) => {
console.log('Received scan_dia event: ' + data);
});
socket.on('disconnect', () => {
console.log('User disconnected: ' + userID);
});
});
module.exports = {
app,
server,
io
};
const port = process.env.PORT || 3001;
// Start the server
server.listen(port, () => {
console.log(`Server is running on http://localhost:${port}`);
});

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const express = require('express');
const http = require('http');
const cors = require('cors');
const dotenv = require('dotenv');
const socket = require('./socket');
const app = express();
const server = http.createServer(app);
const io = socket.init(server);
const iosend = socket.getIO();
const conn = require('./conn.js');
const connection = conn.connection;
dotenv.config();
app.use(express.json());
app.use(express.urlencoded({ extended: true }));
// app.use(fileUpload());
app.options('*', cors());
app.use(cors());
// Helper function to format date
const formatDate = (date) => {
const year = date.getFullYear();
const month = String(date.getMonth() + 1).padStart(2, '0');
const day = String(date.getDate()).padStart(2, '0');
const hours = String(date.getHours()).padStart(2, '0');
const minutes = String(date.getMinutes()).padStart(2, '0');
const seconds = String(date.getSeconds()).padStart(2, '0');
return `${year}-${month}-${day} ${hours}:${minutes}:${seconds}`;
};
async function insert_data(data) {
const parts = data.split(',');
const query_insert = 'INSERT INTO tb_data (ultrasonic1, ultrasonic2,ph1,ph2,ph3,tds1, tds2,tds3)values(?, ?,?,?,?,?,?,?)';
const result_insert = await new Promise((resolve, reject) => {
connection.query(query_insert, [parts[1], parts[2], parts[3], parts[4], parts[5], parts[6], parts[6], parts[6]], (err, result) => {
if (err) {
reject(err);
} else {
resolve(result);
}
});
})
}
app.post('/', async (req, res) => {
var { value } = req.body;
const query_search = 'Select * from tb_data';
try {
const result_search = await new Promise((resolve, reject) => {
connection.query(query_search, (err, result) => {
if (err) {
reject(err);
} else {
resolve(result);
}
});
})
var now = new Date();
if (result_search.length > 0) {
const last_data = result_search[result_search.length - 1];
var converted_time_last = new Date(last_data.waktu);
now = now.getTime();
converted_time_last = converted_time_last.getTime();
var differenceInSeconds = (now - converted_time_last) / 1000;
console.log(differenceInSeconds, "second");
if (differenceInSeconds > 10) {
insert_data(value);
}
} else {
insert_data(value);
}
} catch (error) {
console.log("error post", error);
res.status(500).send(error);
}
const query_status = 'Select * from tb_gerbang';
const result_status = await new Promise((resolve, reject) => {
connection.query(query_status, (err, result) => {
if (err) {
reject(err);
} else {
resolve(result);
}
});
})
const status = result_status[0].status;
io.emit('data', { value, status });
res.status(200).send(status);
// res.status(200).send('idle');
})
app.get('/', async (req, res) => {
const date = req.query.date;
const query_search = 'Select * from tb_data order by waktu desc limit 10';
const result_search = await new Promise((resolve, reject) => {
connection.query(query_search, (err, result) => {
if (err) {
reject(err);
} else {
resolve(result);
}
});
})
res.status(200).send(result_search);
})
app.post('/gerbang', async (req, res) => {
const query = 'Select * from tb_gerbang';
const result = await new Promise((resolve, reject) => {
connection.query(query, (err, result) => {
if (err) {
reject(err);
} else {
resolve(result);
}
});
})
const status_gerbang = result[0].status;
const status_update = status_gerbang == "buka" ? "tutup" : "buka";
const query_update = 'UPDATE tb_gerbang SET status = ?';
const result_update = await new Promise((resolve, reject) => {
connection.query(query_update, [status_update], (err, result) => {
if (err) {
reject(err);
} else {
resolve(result);
}
});
})
res.status(200).send(result);
})
// Helper function to get random number in range
const getRandomInRange = (min, max) => {
return (Math.random() * (max - min) + min).toFixed(2);
};
app.post('/dummy_data', async (req, res) => {
// Date range
const startDate = new Date(2024, 5, 20); // July 15, 2024
const endDate = new Date(2024, 6, 31); // July 31, 2024
// Value ranges
const ultrasonicRange = [150, 200];
const phRange = [6.26, 7.10];
const tdsRange = [1370, 1410];
// Loop to generate and insert data
let currentDate = startDate;
while (currentDate <= endDate) {
for (let hour = 0; hour < 24; hour++) {
currentDate.setHours(hour);
// Generate random seconds
const randomSeconds = Math.floor(Math.random() * 60);
currentDate.setSeconds(randomSeconds);
const waktu = formatDate(currentDate);
const ultrasonic1 = getRandomInRange(...ultrasonicRange);
const ultrasonic2 = getRandomInRange(...ultrasonicRange);
const ph1 = getRandomInRange(...phRange);
const ph2 = getRandomInRange(...phRange);
const ph3 = getRandomInRange(...phRange);
const tds1 = getRandomInRange(...tdsRange);
const tds2 = getRandomInRange(...tdsRange);
const tds3 = getRandomInRange(...tdsRange);
const query = `INSERT INTO tb_data (waktu, ultrasonic1, ultrasonic2, ph1, ph2, ph3, tds1, tds2, tds3)
VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)`;
connection.query(query, [waktu, ultrasonic1, ultrasonic2, ph1, ph2, ph3, tds1, tds2, tds3], (error) => {
if (error) {
console.error('Error inserting data:', error);
return res.status(500).send('Error inserting data');
}
});
}
currentDate.setDate(currentDate.getDate() + 1);
}
res.send('Dummy data inserted successfully');
});
// GET endpoint to fetch and format data
app.get('/dummy_data', async (req, res) => {
const query = 'SELECT * FROM tb_data';
connection.query(query, (error, results) => {
if (error) {
console.error('Error fetching data:', error);
return res.status(500).send('Error fetching data');
}
// Format the 'waktu' field for each result
const formattedResults = results.map(row => ({
...row,
waktu: formatDate(new Date(row.waktu))
}));
res.send(formattedResults);
});
});
// app error handler
app.use((err, req, res, next) => {
console.log(err);
res.status(500).send('Something broke!');
});
io.on('connection', (socket) => {
let userID = socket.id;
console.log('A user connected: ' + userID);
socket.on('scan_dia', (data) => {
console.log('Received scan_dia event: ' + data);
});
socket.on('disconnect', () => {
console.log('User disconnected: ' + userID);
});
});
module.exports = {
app,
server,
io
};
const port = process.env.PORT || 3001;
// Start the server
server.listen(port, () => {
console.log(`Server is running on http://localhost:${port}`);
});

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{
"compilerOptions": {
// Enable latest features
"lib": ["ESNext", "DOM"],
"target": "ESNext",
"module": "ESNext",
"moduleDetection": "force",
"jsx": "react-jsx",
"allowJs": true,
// Bundler mode
"moduleResolution": "bundler",
"allowImportingTsExtensions": true,
"verbatimModuleSyntax": true,
"noEmit": true,
// Best practices
"strict": true,
"skipLibCheck": true,
"noFallthroughCasesInSwitch": true,
// Some stricter flags (disabled by default)
"noUnusedLocals": false,
"noUnusedParameters": false,
"noPropertyAccessFromIndexSignature": false
}
}

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{
"name": "tambak",
"version": "1.0.0",
"description": "tambak backend",
"main": "index.js",
"author": "kicap",
"license": "ISC",
"dependencies": {
"dotenv": "^16.4.5",
"express": "^4.19.2",
"express-form-data": "^2.0.23",
"mysql": "^2.18.1",
"socket.io": "^4.7.5"
}
}

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const socketio = require('socket.io');
// const socketio_client = require('socket.io-client');
const dotenv = require('dotenv');
dotenv.config();
// const socket_client = socketio_client("http://localhost:"+process.env.PORT);
let io;
function init(server) {
io = socketio(server);
return io;
}
function getIO() {
if (!io) {
throw new Error('Socket.io not initialized');
}
return io;
}
module.exports = {
init,
getIO,
// socket_client
};