make get airCondition API

- make get airCondition API according to latitude, longitude

@@ -2,6 +2,7 @@
 
 # dependencies
 frontend/node_modules/*
+backend/node_modules/*
 /.pnp
 .pnp.js
 
@@ -21,3 +22,4 @@ frontend/node_modules/*
 npm-debug.log*
 yarn-debug.log*
 yarn-error.log*
+secrets.json
\ No newline at end of file

-var createError = require('http-errors');
-var express = require('express');
-var path = require('path');
-var cookieParser = require('cookie-parser');
-var logger = require('morgan');
+var createError = require("http-errors");
+var express = require("express");
+var path = require("path");
+var cookieParser = require("cookie-parser");
+var logger = require("morgan");
 
-var indexRouter = require('./routes/index');
-var usersRouter = require('./routes/users');
+var indexRouter = require("./routes/index");
+var usersRouter = require("./routes/users");
+var airConditionRouter = require("./routes/airCondition");
 
 var app = express();
 
 // view engine setup
-app.set('views', path.join(__dirname, 'views'));
-app.set('view engine', 'pug');
+app.set("views", path.join(__dirname, "views"));
+app.set("view engine", "pug");
 
-app.use(logger('dev'));
+app.use(logger("dev"));
 app.use(express.json());
 app.use(express.urlencoded({ extended: false }));
 app.use(cookieParser());
-app.use(express.static(path.join(__dirname, 'public')));
+app.use(express.static(path.join(__dirname, "public")));
 
-app.use('/', indexRouter);
-app.use('/users', usersRouter);
+app.use("/", indexRouter);
+app.use("/users", usersRouter);
+app.use("/airCondition", airConditionRouter);
 
 // catch 404 and forward to error handler
-app.use(function(req, res, next) {
+app.use(function (req, res, next) {
   next(createError(404));
 });
 
 // error handler
-app.use(function(err, req, res, next) {
+app.use(function (err, req, res, next) {
   // set locals, only providing error in development
   res.locals.message = err.message;
-  res.locals.error = req.app.get('env') === 'development' ? err : {};
+  res.locals.error = req.app.get("env") === "development" ? err : {};
 
   // render the error page
   res.status(err.status || 500);
-  res.render('error');
+  res.render("error");
 });
 
 module.exports = app;

@@ -6,6 +6,7 @@
     "start": "node ./bin/www"
   },
   "dependencies": {
+    "axios": "^0.19.2",
     "cookie-parser": "~1.4.3",
     "debug": "~2.6.9",
     "express": "~4.16.0",

+var express = require("express");
+var router = express.Router();
+var axios = require("axios");
+
+const openAPIKey = require("./secrets.json").openAPIKey;
+const googleMapKey = require("./secrets.json").googleAPIKey;
+
+axios.create({
+  // TODO : 웹을 AWS에 올릴때, 해당 baseURL이 달라져야할 수 있음
+  baseURL: "http://localhost:3000",
+  responseType: "json",
+});
+
+/* GET airCondition listing. */
+router.get("/", async function (req, res, next) {
+  console.log("경도:", req.query.latitude);
+  console.log("경도:", req.query.longitude);
+  let airCondition = "";
+  let response = await getPosition(req.query.latitude, req.query.longitude)
+    .then((encodedStation) => getCondition(encodedStation))
+    .then((result) => {
+      airCondition = result;
+    });
+
+  res.send(airCondition);
+});
+
+const getPosition = (lat, lon) => {
+  return axios
+    .get(
+      "https://maps.googleapis.com/maps/api/geocode/json?latlng=" +
+        lat +
+        "," +
+        lon +
+        "&location_type=ROOFTOP&result_type=street_address&key=" +
+        googleMapKey +
+        "&language=ko"
+    )
+    .then(function (response) {
+      console.log("KEY : ", googleMapKey);
+      let stationName = "";
+      for (
+        let i = 0;
+        i < response["data"].results[0]["address_components"].length;
+        i++
+      ) {
+        let temp =
+          response["data"].results[0]["address_components"][i]["long_name"];
+        if (temp[temp.length - 1] == "구") {
+          stationName = temp;
+          break;
+        }
+      }
+      console.log("STATION : ", stationName);
+      return (encodedStation = encodeURI(stationName));
+    })
+    .catch(function (error) {
+      console.log(error.response);
+    });
+};
+
+const getCondition = (encodedStation) => {
+  return axios
+    .get(
+      "http://openapi.airkorea.or.kr/openapi/services/rest/ArpltnInforInqireSvc/getMsrstnAcctoRltmMesureDnsty?serviceKey=" +
+        openAPIKey +
+        "&numOfRows=10&pageNo=1&stationName=" +
+        encodedStation +
+        "&dataTerm=DAILY&ver=1.3&_returnType=json"
+    )
+    .then(function (response) {
+      // console.log("RES :: ", response);
+      result = response["data"]["list"][0];
+      return result;
+    })
+    .catch(function (error) {
+      console.log(error.response);
+    });
+};
+
+module.exports = router;

-var express = require('express');
+var express = require("express");
 var router = express.Router();
 
 /* GET home page. */
-router.get('/', function(req, res, next) {
-  res.render('index', { title: 'Express' });
+router.get("/", function (req, res, next) {
+  res.render("index", { title: "Express" });
 });
 
 module.exports = router;

@@ -3,3 +3,4 @@ extends layout
 block content
   h1= title
   p Welcome to #{title}
+  p This is HowsTheWeather Backend