diff --git a/index.js b/index.js index 382b12b..196b113 100644 --- a/index.js +++ b/index.js @@ -1,11 +1,14 @@ const express = require('express') +const weather = require('./src/weatherAPI.js') +const {requestCityFromIP, requestCoordsFromIP} = require('./src/geoipAPI.js') +const anonymizeip = require('./src/anonymizeip.js') var path = require('path'); const PORT = process.env.PORT || 3000 const HOST = '0.0.0.0' // !* Edit here for demos -const RELEASE_NO = 'PROD-134' +const RELEASE_NO = 'DEMO-2' const api = express() @@ -14,10 +17,64 @@ api.set('view engine', 'pug'); api.use(express.static(path.join(__dirname, 'public'))); +// Define the main route for the sample app. When the homepage of the sample app +// is requested, the server will first determine the client's geolocation based +// on the client's IP address. api.get('/', (req, res) => { - res.render('index', { - release_no: RELEASE_NO - }) + + const clientIP = req.ip + const renderValues = { + release_no: RELEASE_NO, + ipAddr: anonymizeip(clientIP), + } + + requestCityFromIP(clientIP).then((coords) => { + console.log('Coords obj:', coords) + + if ("regionName" in coords && "city" in coords && "country" in coords) { + renderValues.locationName = `${coords.city}, ${coords.regionName}, ${coords.country}` + } else if ("country" in coords) { + if ("city" in coords) { + renderValues.locationName = `${coords.city}, ${coords.country}` + } else if ("region" in coords) { + renderValues.locationName = `${coords.regionName}, ${coords.country}` + } else { + renderValues.locationName = coords.country + } + } else if ("city" in coords) { + renderValues.locationName = coords.city + } else { + renderValues.locationName = coords.regionName + } + + // By default, display the weather in Toronto. + return weather("43.7001", "-79.4163", "America/Toronto") + }).then((weatherData) => { + // renderValues.forecast = JSON.stringify(weatherData) + renderValues.forecast = weatherData + res.render('index', renderValues) + }) +}) + +api.get('/geolocate', (req, res) => { + // If the geolocation permission is denied on the client side, the client + // will send a request to `/geolocate` to get the estimated coordinates + // of the client's IP address. This will then return the coordinates to the + // client, which will use them to call the weather API as it normally would. + geoip(req.ip).then((coords) => { + res.json(coords) + }) +}) + +api.get('/weather', (req, res) => { + const queryParams = req.query + if (!queryParams.lat || !queryParams.lon || !queryParams.timezone) { + res.status(400).send('Missing query parameters. All of the following are required: lat, lon, timezone') + } + + weather(queryParams.lat, queryParams.lon, queryParams.timezone).then((weatherData) => { + res.json(weatherData) + }) }) api.listen(PORT, HOST) diff --git a/package-lock.json b/package-lock.json index 3a636d0..15da1bc 100644 --- a/package-lock.json +++ b/package-lock.json @@ -12,6 +12,9 @@ "express": "^4.17.1", "mysql": "^2.18.1", "pug": "^3.0.2" + }, + "devDependencies": { + "nodemon": "^3.1.0" } }, "node_modules/@babel/helper-string-parser": { @@ -54,6 +57,12 @@ "node": ">=6.9.0" } }, + "node_modules/abbrev": { + "version": "1.1.1", + "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.1.1.tgz", + "integrity": "sha512-nne9/IiQ/hzIhY6pdDnbBtz7DjPTKrY00P/zvPSm5pOFkl6xuGrGnXn/VtTNNfNtAfZ9/1RtehkszU9qcTii0Q==", + "dev": true + }, "node_modules/accepts": { "version": "1.3.7", "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.7.tgz", @@ -77,6 +86,19 @@ "node": ">=0.4.0" } }, + "node_modules/anymatch": { + "version": "3.1.3", + "resolved": "https://registry.npmjs.org/anymatch/-/anymatch-3.1.3.tgz", + "integrity": "sha512-KMReFUr0B4t+D+OBkjR3KYqvocp2XaSzO55UcB6mgQMd3KbcE+mWTyvVV7D/zsdEbNnV6acZUutkiHQXvTr1Rw==", + "dev": true, + "dependencies": { + "normalize-path": "^3.0.0", + "picomatch": "^2.0.4" + }, + "engines": { + "node": ">= 8" + } + }, "node_modules/array-flatten": { "version": "1.1.1", "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz", @@ -103,6 +125,12 @@ "node": ">= 10.0.0" } }, + "node_modules/balanced-match": { + "version": "1.0.2", + "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.2.tgz", + "integrity": "sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw==", + "dev": true + }, "node_modules/bignumber.js": { "version": "9.0.0", "resolved": "https://registry.npmjs.org/bignumber.js/-/bignumber.js-9.0.0.tgz", @@ -111,6 +139,18 @@ "node": "*" } }, + "node_modules/binary-extensions": { + "version": "2.3.0", + "resolved": "https://registry.npmjs.org/binary-extensions/-/binary-extensions-2.3.0.tgz", + "integrity": "sha512-Ceh+7ox5qe7LJuLHoY0feh3pHuUDHAcRUeyL2VYghZwfpkNIy/+8Ocg0a3UuSoYzavmylwuLWQOf3hl0jjMMIw==", + "dev": true, + "engines": { + "node": ">=8" + }, + "funding": { + "url": "https://github.com/sponsors/sindresorhus" + } + }, "node_modules/body-parser": { "version": "1.19.0", "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.19.0.tgz", @@ -131,6 +171,28 @@ "node": ">= 0.8" } }, + "node_modules/brace-expansion": { + "version": "1.1.11", + "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz", + "integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==", + "dev": true, + "dependencies": { + "balanced-match": "^1.0.0", + "concat-map": "0.0.1" + } + }, + "node_modules/braces": { + "version": "3.0.2", + "resolved": "https://registry.npmjs.org/braces/-/braces-3.0.2.tgz", + "integrity": "sha512-b8um+L1RzM3WDSzvhm6gIz1yfTbBt6YTlcEKAvsmqCZZFw46z626lVj9j1yEPW33H5H+lBQpZMP1k8l+78Ha0A==", + "dev": true, + "dependencies": { + "fill-range": "^7.0.1" + }, + "engines": { + "node": ">=8" + } + }, "node_modules/bytes": { "version": "3.1.0", "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.1.0.tgz", @@ -159,6 +221,36 @@ "is-regex": "^1.0.3" } }, + "node_modules/chokidar": { + "version": "3.6.0", + "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-3.6.0.tgz", + "integrity": "sha512-7VT13fmjotKpGipCW9JEQAusEPE+Ei8nl6/g4FBAmIm0GOOLMua9NDDo/DWp0ZAxCr3cPq5ZpBqmPAQgDda2Pw==", + "dev": true, + "dependencies": { + "anymatch": "~3.1.2", + "braces": "~3.0.2", + "glob-parent": "~5.1.2", + "is-binary-path": "~2.1.0", + "is-glob": "~4.0.1", + "normalize-path": "~3.0.0", + "readdirp": "~3.6.0" + }, + "engines": { + "node": ">= 8.10.0" + }, + "funding": { + "url": "https://paulmillr.com/funding/" + }, + "optionalDependencies": { + "fsevents": "~2.3.2" + } + }, + "node_modules/concat-map": { + "version": "0.0.1", + "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz", + "integrity": "sha512-/Srv4dswyQNBfohGpz9o6Yb3Gz3SrUDqBH5rTuhGR7ahtlbYKnVxw2bCFMRljaA7EXHaXZ8wsHdodFvbkhKmqg==", + "dev": true + }, "node_modules/constantinople": { "version": "4.0.1", "resolved": "https://registry.npmjs.org/constantinople/-/constantinople-4.0.1.tgz", @@ -297,6 +389,18 @@ "node": ">= 0.10.0" } }, + "node_modules/fill-range": { + "version": "7.0.1", + "resolved": "https://registry.npmjs.org/fill-range/-/fill-range-7.0.1.tgz", + "integrity": "sha512-qOo9F+dMUmC2Lcb4BbVvnKJxTPjCm+RRpe4gDuGrzkL7mEVl/djYSu2OdQ2Pa302N4oqkSg9ir6jaLWJ2USVpQ==", + "dev": true, + "dependencies": { + "to-regex-range": "^5.0.1" + }, + "engines": { + "node": ">=8" + } + }, "node_modules/finalhandler": { "version": "1.1.2", "resolved": "https://registry.npmjs.org/finalhandler/-/finalhandler-1.1.2.tgz", @@ -330,6 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{ "version": "4.1.1", "resolved": "https://registry.npmjs.org/object-assign/-/object-assign-4.1.1.tgz", @@ -597,6 +883,18 @@ "resolved": "https://registry.npmjs.org/path-to-regexp/-/path-to-regexp-0.1.7.tgz", "integrity": "sha1-32BBeABfUi8V60SQ5yR6G/qmf4w=" }, + "node_modules/picomatch": { + "version": "2.3.1", + "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-2.3.1.tgz", + "integrity": "sha512-JU3teHTNjmE2VCGFzuY8EXzCDVwEqB2a8fsIvwaStHhAWJEeVd1o1QD80CU6+ZdEXXSLbSsuLwJjkCBWqRQUVA==", + "dev": true, + "engines": { + "node": ">=8.6" + }, + "funding": { + "url": "https://github.com/sponsors/jonschlinkert" + } + }, "node_modules/process-nextick-args": { "version": "2.0.1", "resolved": "https://registry.npmjs.org/process-nextick-args/-/process-nextick-args-2.0.1.tgz", @@ -622,6 +920,12 @@ "node": ">= 0.10" } }, + "node_modules/pstree.remy": { + "version": "1.1.8", + "resolved": "https://registry.npmjs.org/pstree.remy/-/pstree.remy-1.1.8.tgz", + "integrity": 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"https://registry.npmjs.org/undefsafe/-/undefsafe-2.0.5.tgz", + "integrity": "sha512-WxONCrssBM8TSPRqN5EmsjVrsv4A8X12J4ArBiiayv3DyyG3ZlIg6yysuuSYdZsVz3TKcTg2fd//Ujd4CHV1iA==", + "dev": true + }, "unpipe": { "version": "1.0.0", "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz", @@ -1731,6 +2398,12 @@ "assert-never": "^1.2.1", "babel-walk": "3.0.0-canary-5" } + }, + "yallist": { + "version": "4.0.0", + "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz", + "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A==", + "dev": true } } } diff --git a/package.json b/package.json index b740ebe..f99947d 100644 --- a/package.json +++ b/package.json @@ -4,7 +4,8 @@ "description": "", "main": "index.js", "scripts": { - "test": "echo \"Error: no test specified\" && exit 1" + "test": "echo \"Error: no test specified\" && exit 1", + "dev": "nodemon ./index.js localhost 8080" }, "author": "", "license": "ISC", @@ -12,5 +13,8 @@ "express": "^4.17.1", "mysql": "^2.18.1", "pug": "^3.0.2" + }, + "devDependencies": { + "nodemon": "^3.1.0" } } diff --git a/src/anonymizeip.js b/src/anonymizeip.js new file mode 100644 index 0000000..7d7df6d --- /dev/null +++ b/src/anonymizeip.js @@ -0,0 +1,4 @@ +module.exports = function (ipAddr) { + const ipSegments = ipAddr.split('.') + return `***.***.${ipSegments[2]}.${ipSegments[3]}` +} diff --git a/src/geoipAPI.js b/src/geoipAPI.js new file mode 100644 index 0000000..bf69bfd --- /dev/null +++ b/src/geoipAPI.js @@ -0,0 +1,108 @@ +const http = require('http') + +const ipAddrRegex = /[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}/ + +function anonymizeCoordinate(coord) { + + // Randomly add or subtract a small value to the coordinate to anonymize it + // by up to 0.5 degrees in either direction. This keeps the location within + // the same city or region, but not at the exact location. + const addOrSubtract = Math.random() > 0.5 ? 1 : -1 + const randomVariation = Math.random() * 0.5 * addOrSubtract + + // Return the anonymized coordinate as a string with two decimal places, as + // reduced specificity adds to the anonymization effect. + return (parseFloat(coord) + randomVariation).toFixed(2) +} + +function buildAPIRequest(ipAddr, fieldsVal) { + let queryIP = '' + + // If the IP address is a localhost address, we want to add a blank query + // to our returned URL. The API call will geolocate the IP address that + // queried the API endpoint, rather than attempting to geolocate localhost. + if (!ipAddr.startsWith('127.')) { + queryIP = ipAddr + } + + return `http://ip-api.com/json/${queryIP}?fields=${fieldsVal}` + +} + +function apiRequest(url) { + + return new Promise((resolve, reject) => { + + let coordsResponse = {} + + const geoipReq = http.get(url, (res) => { + // console.log(`STATUS: ${res.statusCode}`) + // console.log(`HEADERS: ${JSON.stringify(res.headers)}`) + res.setEncoding('utf8') + + let responseData = ''; + res.on('data', (chunk) => { + // console.log(`BODY: ${JSON.stringify(chunk)}`) + responseData += chunk + }) + + res.on('end', () => { + try { + coordsResponse = JSON.parse(responseData) + + // Because this sample app is used in live demos, we want to + // anonymize the coordinates returned to the client side. + if ("lat" in coordsResponse && "lon" in coordsResponse) { + coordsResponse.lat = anonymizeCoordinate(coordsResponse.lat) + coordsResponse.lon = anonymizeCoordinate(coordsResponse.lon) + } + + if (coordsResponse.status !== 'success') { + throw new Error('API request to `ip-api.com` failed.') + } else { + resolve(coordsResponse) + } + } catch (e) { + console.error(e.message) + reject(e) + } + }) + }) + + geoipReq.on('error', (e) => { + console.error(`problem with request: ${e.message}`) + reject(e) + }) + + geoipReq.end() + }) +} + +function requestCoordsFromIP(ipAddr) { + + // Validate input and throw an error if the input string isn't a valid IP address. + if (!ipAddrRegex.test(ipAddr)) { + throw new Error('Invalid IP address format') + } + + const url = buildAPIRequest(ipAddr, 'status,country,regionName,city,lat,lon,timezone') + return apiRequest(url) +} + +function requestCityFromIP(ipAddr) { + + // Validate input and throw an error if the input string isn't a valid IP address. + if (!ipAddrRegex.test(ipAddr)) { + throw new Error('Invalid IP address format') + } + + const url = buildAPIRequest(ipAddr, 'status,country,regionName,city') + return apiRequest(url) +} + + + +module.exports = { + requestCityFromIP, + requestCoordsFromIP, +} diff --git a/src/weatherAPI.js b/src/weatherAPI.js new file mode 100644 index 0000000..24b321b --- /dev/null +++ b/src/weatherAPI.js @@ -0,0 +1,238 @@ +const http = require('node:http') +const { parse } = require('node:path') +// https://api.open-meteo.com/v1/forecast? +// latitude=49.2497& +// longitude=-123.1193& +// current=temperature_2m,relative_humidity_2m,apparent_temperature,precipitation,weather_code,wind_speed_10m,wind_direction_10m& +// daily=weather_code,temperature_2m_max,temperature_2m_min,precipitation_sum,precipitation_probability_max& +// timezone=America%2FLos_Angeles& +// forecast_days=3 + +const weatherCodes = { + 0: 'Clear', + 1: 'Mostly Clear', + 2: 'Partly Cloudy', + 3: 'Overcast', + 45: 'Fog', + 48: 'Fog', + 51: 'Light Drizzle', + 53: 'Moderate Drizzle', + 55: 'Heavy Drizzle', + 56: 'Freezing Drizzle', + 57: 'Freezing Drizzle', + 61: 'Light Rain', + 63: 'Rain', + 65: 'Heavy Rain', + 66: 'Freezing Rain', + 67: 'Freezing Rain', + 71: 'Light Snow', + 73: 'Snow', + 75: 'Heavy Snow', + 77: 'Snow Grains', + 80: 'Light Showers', + 81: 'Showers', + 82: 'Violent Showers', + 85: 'Light Snow Showers', + 86: 'Snow Showers', + 95: 'Thunderstorm', + 96: 'Thunderstorm', + 99: 'Thunderstorm', +} + +// A 32-point compass rose +const compassPoints = [ + ['North', 'N'], + ['North by East', 'NbE'], + ['North-Northeast', 'NNE'], + ['Northeast by North', 'NEbN'], + ['Northeast', 'NE'], + ['Northeast by East', 'NEbE'], + ['East-Northeast', 'ENE'], + ['East by North', 'EbN'], + ['East', 'E'], + ['East by South', 'EbS'], + ['East-Southeast', 'ESE'], + ['Southeast by East', 'SEbE'], + ['Southeast', 'SE'], + ['Southeast by South', 'SEbS'], + ['South-Southeast', 'SSE'], + ['South by East', 'SbE'], + ['South', 'S'], + ['South by West', 'SbW'], + ['South-Southwest', 'SSW'], + ['Southwest by South', 'SWbS'], + ['Southwest', 'SW'], + ['Southwest by West', 'SWbW'], + ['West-Southwest', 'WSW'], + ['West by South', 'WbS'], + ['West', 'W'], + ['West by North', 'WbN'], + ['West-Northwest', 'WNW'], + ['Northwest by West', 'NWbW'], + ['Northwest', 'NW'], + ['Northwest by North', 'NWbN'], + ['North-Northwest', 'NNW'], + ['North by West', 'NbW'] +] + +const defaultQueryParams = { + latitude: 49.24, + longitude: -123.11, + timezone: 'America/Los_Angeles', + current: 'temperature_2m,relative_humidity_2m,apparent_temperature,precipitation,weather_code,wind_speed_10m,wind_direction_10m', + daily: 'weather_code,temperature_2m_max,temperature_2m_min,precipitation_sum,precipitation_probability_max', + forecast_days: 3 +} + +// function requestCityFromCoords(lat, lon) { +// const baseApiQuery = "http://api.geonames.org/findNearbyPlaceName?username=ctoai_n3a7&cities=cities15000" +// const requestURL = `${baseApiQuery}&lat=${lat}&lng=${lon}` + +// return new Promise((resolve, reject) => { + +// const geocodeReq = http.get(requestURL, (res) => { +// // console.log(`STATUS: ${res.statusCode}`) +// // console.log(`HEADERS: ${JSON.stringify(res.headers)}`) +// res.setEncoding('utf8') + +// let responseData = ''; +// res.on('data', (chunk) => { +// // console.log(`BODY: ${JSON.stringify(chunk)}`) +// responseData += chunk +// }) + +// res.on('end', () => { +// try { +// const cityResponse = JSON.parse(responseData) +// const city = { +// city: cityResponse.geonames[0].name, +// regionName: cityResponse.geonames[0].adminName1, +// country: cityResponse.geonames[0].countryName +// } + +// resolve(city) +// } catch (e) { +// console.error(e.message) +// reject(e) +// } +// }) +// }) + +// geocodeReq.on('error', (e) => { +// console.error(`problem with request: ${e.message}`) +// }) + +// geocodeReq.end() +// }) +// } + +function generateForecast(weatherData) { + const dailyForecasts = {} + + const forecastElements = Object.entries(weatherData.daily) + weatherData.daily.time.forEach((day, index) => { + const singleDayForecast = { + time: day, + weather: weatherData.daily.weather[index] + } + + forecastElements.forEach(([key, value]) => { + if (!['time', 'weather_code', 'weather'].includes(key)) { + singleDayForecast[key] = [value[index], weatherData.daily_units[key]] + } + }) + + dailyForecasts[day] = singleDayForecast + }) + + console.log(dailyForecasts) + return dailyForecasts +} + +function generateCurrentConditions(weatherData) { + const rawConditions = weatherData.current + const rawUnits = weatherData.current_units + + const currentConditions = {} + + Object.entries(rawConditions).forEach(([key, value]) => { + if (key === 'weather') { + currentConditions['description'] = value + } else if (key === 'apparent_temperature') { + currentConditions['feels_like'] = [value, rawUnits[key]] + } else if (['time', 'interval', 'weather_code'].includes(key)) { + // Do nothing + } else { + currentConditions[key] = [value, rawUnits[key]] + } + }) + + const windCompass = compassPoints[Math.round(rawConditions.wind_direction_10m / 11.25)] + currentConditions['wind_compass'] = windCompass[0] + currentConditions['wind_compass_short'] = windCompass[1] + + return currentConditions +} + +function getWeather(lat, lon, timezone) { + + const queryParams = Object.assign({}, defaultQueryParams, { + latitude: parseFloat(lat).toFixed(2), + longitude: parseFloat(lon).toFixed(2), + timezone: timezone + }) + + console.log('------------------------------\nQuery parameters:') + console.log(queryParams) + + const queryString = Object.keys(queryParams).map(key => key + '=' + queryParams[key]).join('&') + + const url = `http://api.open-meteo.com/v1/forecast?${queryString}` + + return new Promise((resolve, reject) => { + let weatherResponse = {} + const weatherReq = http.get(url, (res) => { + // console.log(`STATUS: ${res.statusCode}`) + // console.log(`HEADERS: ${JSON.stringify(res.headers)}`) + res.setEncoding('utf8') + + let responseData = '' + res.on('data', (chunk) => { + // console.log(`BODY: ${JSON.stringify(chunk)}`) + responseData += chunk + }) + + res.on('end', () => { + try { + weatherResponse = JSON.parse(responseData) + weatherResponse.current.weather = weatherCodes[weatherResponse.current['weather_code']] + weatherResponse.daily.weather = [] + weatherResponse.daily.weather_code.forEach(day => { + weatherResponse.daily.weather.push(weatherCodes[day]) + }) + // console.log('------------------------------\nWeather response:') + // console.log(weatherResponse) + // console.log('------------------------------') + + const parsedWeatherData = { + current: generateCurrentConditions(weatherResponse), + daily_forecast: generateForecast(weatherResponse) + } + + resolve(parsedWeatherData) + } catch (e) { + console.error(e.message) + reject(e) + } + }) + }) + + weatherReq.on('error', (e) => { + console.error(`problem with request: ${e.message}`) + }) + + weatherReq.end() + }) +} + +module.exports = getWeather;