[Redis] Node.js Redis, GeoRedis Module

const redis = require('redis')
require('dotenv').config();

const client = redis.createClient({
    url: `redis://${process.env.REDIS_HOST}:${process.env.REDIS_PORT}`,
    // EX) 'redis://localhost:6379'
})
const geo = require('georedis').initialize(client)


// String
client.set('name', 'MyName')
client.get('name', (error, reply) => {
    console.log(reply);
})

// Object
client.hmset('friends', 'name', 'zero', 'age', 24);
client.hgetall('friends', (error, obj) => {
    console.log(obj);
})

// List
client.rpush('fruits', 'apple', 'orange', 'apple') // Array.push
client.lpush('fruits', 'banana', 'pear'); // Array.unshift
client.lrange('fruits', 0, -1, (error, arr) => { // Start, End Index
    console.log(arr);
})

// Set
client.sadd('animals', 'dog', 'cat', 'bear', 'cat', 'lion');
client.smembers('animals', (error, set) => {
    console.log(set);
})

// Delete
client.del('fruits')

// is Exists
const isExists = client.exists('name');
console.log('Hello isExists :', isExists);

// 6379> lrange fruits 0 -1
client.lrange('fruits', 0, -1, (error, arr) => {
    console.log(arr);
})


// DOC : https://www.npmjs.com/package/georedis
// 단일 등록
// 6379> GEOADD geo:locations -79.4167 43.6667 'Toronto'
geo.addLocation(
    'Toronto', {latitude: 43.6667, longitude: -79.4167},
    (error, reply) => {
        if (error) console.error(error);
        else console.log('added location: ', reply);
    })

const locationSet = {
    'Toronto': {latitude: 43.6667, longitude: -79.4167},
    'Philadelphia': {latitude: 39.9523, longitude: -75.1638},
    'Palo Alto': {latitude: 37.4688, longitude: -122.1411},
    'San Francisco': {latitude: 37.7691, longitude: -122.4449},
    'St. John\'s': {latitude: 47.5500, longitude: -52.6667},
    'New York': {latitude: 40.7143, longitude: -74.0060},
    'Twillingate': {latitude: 49.6500, longitude: -54.7500},
    'Ottawa': {latitude: 45.4167, longitude: -75.7000},
    'Calgary': {latitude: 51.0833, longitude: -114.0833},
    'Mumbai': {latitude: 18.9750, longitude: 72.8258}
}

// Object 형식으로 등록
// GEOADD
// 6379> GEOADD geo:locations -79.4167 43.6667 'Toronto' -75.1638 39.9523 'Philadelphia' ...
geo.addLocations(locationSet, function (err, reply) {
    if (err) console.error(err)
    else console.log('added locations:', reply)
})


// GEOPOS
// 6379> GEOPOS geo:locations Toronto
geo.location('Toronto', function (err, location) {
    if (err) console.error(err)
    else console.log('Location for Toronto is: ', location.latitude, location.longitude)
})

// GEOPOS multiple locations
// 6379> GEOPOS geo:locations 'Toronto' 'Philadelphia' 'Palo Alto' 'San Francisco' 'Ottawa'
geo.locations(['Toronto', 'Philadelphia', 'Palo Alto', 'San Francisco', 'Ottawa'], function (err, locations) {
    if (err) console.error(err)
    else {
        for (var locationName in locations) {
            console.log(locationName + "'s location is:", locations[locationName].latitude, locations[locationName].longitude)
        }
    }
})

// GEORADIUS
// 6379> GEORADIUS geo:locations -79.403723 43.646838 5000 m
geo.nearby({latitude: 43.646838, longitude: -79.403723}, 5000, function (err, locations) {
    if (err) console.error(err)
    else console.log('nearby locations:', locations)
})


var options = {
    withCoordinates: true, // 일치하는 항목의 경도, 위도 좌표를 반환, default false
    withHashes: true, // Geohash 인코딩으로 반환, default false
    withDistances: true, // 지정된 중심에서 항목의 거리를 반환, default false
    order: 'ASC', // 가장 가까운 것 부터 정렬, 'DESC' or true (same as 'ASC'), default false
    units: 'm', // m (Meters), km (Kilometers), mi (Miles), ft (Feet), default 'm'
    count: 100, // N개의 일치하는 항목으로 결과를 제한, default undefined (All)
    accurate: true // Useful if in emulated mode and accuracy is important, default false
}

// look for all points within ~5000m of Toronto with the options.
// GEORADIUS
// GEORADIUS geo:locations -79.403723 43.646838 5000 m WITHCOORD WITHDIST WITHHASH COUNT 100 ASC
/*
1) 1) "Toronto"
   2) "2443.4497"
   3) (integer) 1973332721058153
   4) 1) "-79.4166979193687439"
      2) "43.66669965801614239" */
geo.nearby({latitude: 43.646838, longitude: -79.403723}, 5000, options, function (err, locations) {
    if (err) console.error(err)
    else console.log('nearby locations:', locations)
})

// GEORADIUSBYMEMBER
// GEORADIUSBYMEMBER geo:locations 'Toronto' 5000 m WITHCOORD WITHDIST WITHHASH COUNT 100 ASC
/*
1) 1) "Toronto"
   2) "0.0000"
   3) (integer) 1973332721058153
   4) 1) "-79.4166979193687439"
      2) "43.66669965801614239" */
geo.nearby('Toronto', 5000, options, function (err, locations) {
    if (err) console.error(err)
    else console.log('nearby locations:', locations)
})


// ZREM
// ZREM geo:locations 'New York'
geo.removeLocation('New York', function (err, reply) {
    if (err) console.error(err)
    else console.log('removed location:', reply)
})

// OR Quicker for Bulk Removals
// ZREM multiple locations
// ZREM geo:locations 'New York' 'St. John\'s' 'San Francisco'
geo.removeLocations(['New York', 'St. John\'s', 'San Francisco'], function (err, reply) {
    if (err) console.error(err)
    else console.log('removed locations', reply)
})