295 lines
11 KiB
JavaScript
295 lines
11 KiB
JavaScript
// server.js
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require('dotenv').config();
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const express = require('express');
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const mysql = require('mysql2/promise');
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const bodyParser = require('body-parser');
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const path = require('path');
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const axios = require('axios');
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const { uploadTrendsCsv } = require('./s3');
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const app = express();
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const PORT = process.env.PORT || 3000;
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// ─── Helpers ────────────────────────────────────────────────────────────────
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// zero-pad
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const pad2 = n => n.toString().padStart(2,'0');
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// Build an SQL‐compatible DATETIME string in America/New_York (with DST)
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function localDatetimeSQL(date) {
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// datePart = "YYYY-MM-DD"
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const datePart = new Intl.DateTimeFormat('en-CA', {
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timeZone: 'America/New_York',
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year: 'numeric',
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month: '2-digit',
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day: '2-digit'
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}).format(date);
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// timePart = "HH:MM:SS"
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const timePart = new Intl.DateTimeFormat('en-GB', {
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timeZone: 'America/New_York',
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hour12: false,
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hour: '2-digit',
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minute: '2-digit',
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second: '2-digit'
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}).format(date);
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return `${datePart} ${timePart}`;
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}
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// Format a Date in EST as “M/D/YY @HH:mm” (24-hour, for Slack)
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function shortEST(date) {
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const dateFmt = new Intl.DateTimeFormat('en-US', {
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timeZone: 'America/New_York',
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month: 'numeric',
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day: 'numeric',
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year: '2-digit'
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});
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const timeFmt = new Intl.DateTimeFormat('en-US', {
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timeZone: 'America/New_York',
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hour12: false,
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hour: '2-digit',
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minute: '2-digit'
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});
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return `${dateFmt.format(date)} @${timeFmt.format(date)}`;
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}
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// NOAA heat-index formula
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function computeHeatIndex(T, R) {
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const [c1,c2,c3,c4,c5,c6,c7,c8,c9] =
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[-42.379,2.04901523,10.14333127,-0.22475541,
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-0.00683783,-0.05481717,0.00122874,0.00085282,-0.00000199];
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const HI = c1 + c2*T + c3*R + c4*T*R
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+ c5*T*T + c6*R*R + c7*T*T*R
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+ c8*T*R*R + c9*T*T*R*R;
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return Math.round(HI * 100) / 100;
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}
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// Determine Day/Night shift and rolling period
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function getShiftInfo(now) {
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const est = new Date(now.toLocaleString('en-US', { timeZone:'America/New_York' }));
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const h = est.getHours(), m = est.getMinutes();
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let shift, start = new Date(est);
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if (h > 7 || (h === 7 && m >= 0)) {
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if (h < 17 || (h === 17 && m < 30)) {
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shift = 'Day'; start.setHours(7,0,0,0);
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} else {
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shift = 'Night'; start.setHours(17,30,0,0);
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}
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} else {
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shift = 'Night';
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start.setDate(start.getDate() - 1);
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start.setHours(17,30,0,0);
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}
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const key = `${shift}-${start.toISOString().slice(0,10)}-${start.getHours()}${start.getMinutes()}`;
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return { shift, key, estNow: est };
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}
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// Fetch current Baltimore forecast
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async function fetchCurrentWeather() {
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const key = process.env.WEATHER_API_KEY;
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const zip = process.env.ZIP_CODE;
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if (!key || !zip) return 'Unavailable';
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try {
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const { data } = await axios.get(
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'https://api.openweathermap.org/data/2.5/weather',
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{ params: { zip:`${zip},us`, appid:key, units:'imperial' } }
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);
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const desc = data.weather[0].description.replace(/^\w/,c=>c.toUpperCase());
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const hi = Math.round(data.main.temp_max);
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const hum = data.main.humidity;
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return `${desc}. Hi of ${hi}, Humidity ${hum}%`;
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} catch (e) {
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console.error('Weather API error:', e.message);
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return 'Unavailable';
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}
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}
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// ─── MariaDB Pool ─────────────────────────────────────────────────────────────
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const pool = mysql.createPool({
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host: process.env.DB_HOST,
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port: parseInt(process.env.DB_PORT,10)||3306,
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user: process.env.DB_USER,
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password: process.env.DB_PASSWORD,
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database: process.env.DB_NAME,
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waitForConnections: true,
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connectionLimit: 10,
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queueLimit: 0,
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connectTimeout: 10000,
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dateStrings: ['DATETIME'] // ensure we get raw strings back
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});
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// Ensure table exists
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(async () => {
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const sql = `
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CREATE TABLE IF NOT EXISTS readings (
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id INT AUTO_INCREMENT PRIMARY KEY,
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location VARCHAR(20) NOT NULL,
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stationDockDoor VARCHAR(10) NOT NULL,
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timestamp DATETIME NOT NULL,
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temperature DOUBLE,
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humidity DOUBLE,
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heatIndex DOUBLE
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);
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`;
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await pool.execute(sql);
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})();
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// ─── Middleware & Static ─────────────────────────────────────────────────────
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app.use(bodyParser.json());
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app.use(express.static(path.join(__dirname,'public'), { index: 'heatmap.html' }));
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// ─── SSE Setup ────────────────────────────────────────────────────────────────
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let clients = [];
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app.get('/api/stream',(req,res)=>{
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res.set({
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'Content-Type':'text/event-stream',
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'Cache-Control':'no-cache',
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Connection:'keep-alive'
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});
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res.flushHeaders();
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clients.push(res);
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req.on('close',()=>{ clients = clients.filter(c=>c!==res); });
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});
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function broadcast(evt,data){
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const msg = `event: ${evt}\ndata: ${JSON.stringify(data)}\n\n`;
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clients.forEach(c=>c.write(msg));
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}
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// ─── Dual Dock-Door Endpoint ──────────────────────────────────────────────────
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app.post('/api/readings', async (req,res) => {
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try {
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const { inbound={}, outbound={} } = req.body;
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const { dockDoor: inD, temperature: inT, humidity: inH } = inbound;
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const { dockDoor: outD, temperature: outT, humidity: outH } = outbound;
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if ([inD,inT,inH,outD,outT,outH].some(v=>v==null))
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return res.status(400).json({ error:'Missing fields' });
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// compute
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const hiIn = computeHeatIndex(inT,inH);
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const hiOut = computeHeatIndex(outT,outH);
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const now = new Date();
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const { shift, key, estNow } = getShiftInfo(now);
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shiftCounters[key] = (shiftCounters[key]||0)+1;
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const period = shiftCounters[key];
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// timestamps
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const sqlTs = localDatetimeSQL(estNow);
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const shortTs = shortEST(estNow);
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// insert
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const ins = `
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INSERT INTO readings
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(location,stationDockDoor,timestamp,temperature,humidity,heatIndex)
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VALUES(?,?,?,?,?,?)`;
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await pool.execute(ins, ['Inbound', String(inD), sqlTs, inT, inH, hiIn]);
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await pool.execute(ins, ['Outbound', String(outD), sqlTs, outT, outH, hiOut]);
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// SSE
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broadcast('new-reading', { location:'Inbound', stationDockDoor:String(inD), timestamp:shortTs, temperature:inT, humidity:inH, heatIndex:hiIn });
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broadcast('new-reading', { location:'Outbound', stationDockDoor:String(outD), timestamp:shortTs, temperature:outT, humidity:outH, heatIndex:hiOut });
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// upload CSV
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const y=estNow.getFullYear(), m=pad2(estNow.getMonth()+1), d=pad2(estNow.getDate());
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const dateKey = `${y}${m}${d}`;
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const [rows] = await pool.execute(`SELECT * FROM readings WHERE DATE(timestamp)=CURDATE() ORDER BY timestamp`);
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let csvUrl=null;
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try{ csvUrl=await uploadTrendsCsv(dateKey,rows) }catch(e){console.error(e)}
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// weather + Slack
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const weather = await fetchCurrentWeather();
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const text =
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`*_${shift} shift Period ${period} dock/ trailer temperature checks for ${shortTs}_*\n`+
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`*_Current Weather Forecast for Baltimore: ${weather}_*\n\n`+
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`*_⬇️ Inbound Dock Door 🚛 :_* ${inD}\n`+
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`*_Temp:_* ${inT} °F 🌡️\n`+
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`*_Humidity:_* ${inH} % 💦\n`+
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`*_Heat Index:_* ${hiIn} °F 🥵\n\n`+
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`*_⬆️ Outbound Dock Door 🚛 :_* ${outD}\n`+
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`*_Temp:_* ${outT} °F 🌡️\n`+
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`*_Humidity:_* ${outH} % 💦\n`+
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`*_Heat Index:_* ${hiOut} °F 🥵`;
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await axios.post(
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process.env.SLACK_WEBHOOK_URL,
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{ text },
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{ headers:{ 'Content-Type':'application/json' } }
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);
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res.json({ success:true, shift, period, csvUrl });
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} catch(err) {
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console.error(err);
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res.status(500).json({ error: err.message });
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}
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});
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// ─── Area/Mod Endpoint ───────────────────────────────────────────────────────
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app.post('/api/area-readings', async (req,res) => {
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try {
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const { area, stationCode, temperature:T, humidity:H } = req.body;
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if (!area||!stationCode||T==null||H==null)
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return res.status(400).json({ error:'Missing fields' });
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const hi = computeHeatIndex(T,H);
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const now = new Date();
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const { shift, estNow } = getShiftInfo(now);
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const sqlTs = localDatetimeSQL(estNow);
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const shortTs = shortEST(estNow);
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await pool.execute(
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`INSERT INTO readings(location,stationDockDoor,timestamp,temperature,humidity,heatIndex)
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VALUES(?,?,?,?,?,?)`,
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[area, stationCode, sqlTs, T, H, hi]
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);
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broadcast('new-area-reading', { location:area, stationDockDoor:stationCode, timestamp:shortTs, temperature:T, humidity:H, heatIndex:hi });
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const y=estNow.getFullYear(), m=pad2(estNow.getMonth()+1), d=pad2(estNow.getDate());
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const dateKey = `${y}${m}${d}`;
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const [rows] = await pool.execute(`SELECT * FROM readings WHERE DATE(timestamp)=CURDATE() ORDER BY timestamp`);
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let csvUrl=null;
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try{ csvUrl=await uploadTrendsCsv(dateKey,rows) }catch(e){console.error(e)}
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const weather = await fetchCurrentWeather();
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const text =
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`*_${shift} shift ${area} temp check for ${shortTs}_*\n`+
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`*_Current Weather Forecast for Baltimore: ${weather}_*\n\n`+
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`*_${area.toUpperCase()} station:_* ${stationCode}\n`+
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`*_Temp:_* ${T} °F 🌡️\n`+
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`*_Humidity:_* ${H} % 💦\n`+
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`*_Heat Index:_* ${hi} °F 🥵`;
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await axios.post(
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process.env.SLACK_WEBHOOK_URL,
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{ text },
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{ headers:{ 'Content-Type':'application/json' } }
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);
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res.json({ success:true, csvUrl });
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} catch(err) {
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console.error(err);
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res.status(500).json({ error: err.message });
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}
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});
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// ─── Export & Fetch ──────────────────────────────────────────────────────────
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app.get('/api/readings', async (req,res)=>{
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const [rows] = await pool.execute(`SELECT * FROM readings ORDER BY timestamp`);
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res.json(rows);
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});
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app.get('/api/export', async (req,res)=>{
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const [rows] = await pool.execute(`SELECT * FROM readings ORDER BY timestamp`);
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res.setHeader('Content-disposition','attachment; filename=readings.csv');
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res.set('Content-Type','text/csv');
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res.write('id,location,stationDockDoor,timestamp,temperature,humidity,heatIndex\n');
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rows.forEach(r=>{
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// r.timestamp is already "YYYY-MM-DD HH:mm:ss" in EST/EDT
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res.write(`${r.id},${r.location},${r.stationDockDoor},${r.timestamp},${r.temperature},${r.humidity},${r.heatIndex}\n`);
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});
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res.end();
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});
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// ─── Start ───────────────────────────────────────────────────────────────────
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app.listen(PORT, ()=>{
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console.log(`Server running on http://localhost:${PORT}`);
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});
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