abandon kakao and apply line

+const lineCtrl = require("./line.ctrl");
+
+
+var express = require('express');
+const request = require('request');
+const TARGET_URL = 'https://api.line.me/v2/bot/message/reply'
+const TOKEN = 'tdN03DyXDAcKGZsuiPndaU7UC2GzuEQYUhPCkDnGWXGGdiPmV15QYbFU1U5JP5EpiETIKLqOmci/RxFZTfD7FRMED0OpT+3qgEYBNf8T9/jRzHRm7rblBLtzFBVOeXeYRcluOsz4koE4JaAJaUtMtwdB04t89/1O/w1cDnyilFU='
+const fs = require('fs');
+const path = require('path');
+const HTTPS = require('https');
+const domain = "www.osstest17.ml"
+const sslport = 23023;
+
+const bodyParser = require('body-parser');
+var app = express();
+app.use(bodyParser.json());
+let username; //username 저장
+app.post('/hook', function (req, res) {
+
+    var eventObj = req.body.events[0];
+    //var source = eventObj.source;
+    //var message = eventObj.message;
+
+    // request log
+    console.log('======================', new Date() ,'======================');
+    console.log('[request]', req.body);
+    console.log('[request source] ', eventObj.source);
+    console.log('[request message]', eventObj.message);
+    if((eventObj.message.text == '문제추천')&&(username != undefined)){
+        console.log("문제를 추천합니다.");
+        recommendData = lineCtrl.lineRecommend(username);
+        recommendBJ(eventObj.replyToken, recommendData);
+    } else {
+    let isExist = lineCtrl.findID(eventObj.message.text);
+    if (isExist == true)
+        username = eventObj.message.text;
+    else{
+        request.post(
+            {
+                url: TARGET_URL,
+                headers: {
+                    'Authorization': `Bearer ${TOKEN}`
+                },
+                json: {
+                    "replyToken":replyToken,
+                    "messages":[
+                        {
+                            "type":"text",
+                            "text": "작심삼일 혹은 백준 사이트의 ID값이 올바르지 않습니다. 다시 입력해주세요."
+                        }
+                    ]
+                }
+            },(body) => {
+                console.log(body)
+            });
+        }
+    
+    recommendBJ(eventObj.replyToken, eventObj.message.text);
+    }
+    res.sendStatus(200);
+},
+
+function recommendBJ(replyToken, message) {
+    var recommendProblem = "오늘의 추천문제는 " + message.problem_title + "입니다.";
+    var problemURL = "https://www.boj.kr/" + recommendData.problem_number;
+    request.post(
+        {
+            url: TARGET_URL,
+            headers: {
+                'Authorization': `Bearer ${TOKEN}`
+            },
+            json: {
+                "replyToken":replyToken,
+                "messages":[
+                    {
+                        "type":"text",
+                        "text": recommendProblem
+                    },
+                    {
+                        "type":"text",
+                        "text": problemURL
+                    }
+                ]
+            }
+        },(body) => {
+            console.log(body)
+        });
+    
+
+    res.sendStatus(200);
+});
+
+try {
+    const option = {
+      ca: fs.readFileSync('/etc/letsencrypt/live/' + domain +'/fullchain.pem'),
+      key: fs.readFileSync(path.resolve(process.cwd(), '/etc/letsencrypt/live/' + domain +'/privkey.pem'), 'utf8').toString(),
+      cert: fs.readFileSync(path.resolve(process.cwd(), '/etc/letsencrypt/live/' + domain +'/cert.pem'), 'utf8').toString(),
+    };
+  
+    HTTPS.createServer(option, app).listen(sslport, () => {
+      console.log(`[HTTPS] Server is started on port ${sslport}`);
+    });
+  } catch (error) {
+    console.log('[HTTPS] HTTPS 오류가 발생하였습니다. HTTPS 서버는 실행되지 않습니다.');
+    console.log(error);
+  }
\ No newline at end of file

+const Profile = require("../../models/profile");
+const problem_set = require("../../data/problem_set");
+const compareBJ = require("../../util/compareBJ");
+
+/*
+POST api/notify/slack/recommend
+{
+  username: "username"
+}
+*/
+exports.lineRecommend = (username) => {
+
+    const profile = await Profile.findByUsername(username);
+    if (!profile) {
+      console.log("401");
+      return;
+    }
+    let unsolved_data = compareBJ.compareBJ(
+      profile.getBJdata(),
+      problem_set.problem_set
+    );
+    let recommendData = compareBJ.randomItem(unsolved_data);
+
+    if (!recommendData) {
+      console.log("402");
+      return;
+    } else {
+        return recommendData;
+    }
+};
+
+exports.isExist = (id) =>
+{
+    const profile = await Profile.findByUsername(username);
+    if (!profile) {
+      return false;
+    } else return true;
+}
\ No newline at end of file