이미지 인식 추가. 번역은 미완성

+var express = require('express');
+var app = express();
 const line = require('@line/bot-sdk');
 const line = require('@line/bot-sdk');
-const express = require('express');
+
+
 //papago api
 //papago api
 var request = require('request');
 var request = require('request');
 
 
@@ -14,18 +17,17 @@ var languagedetect_api_url = 'https://openapi.naver.com/v1/papago/detectLangs'
 var client_id = 'xZMx34y7uru1v8lywZ2d';
 var client_id = 'xZMx34y7uru1v8lywZ2d';
 var client_secret = 'p6L7M7WsH9';
 var client_secret = 'p6L7M7WsH9';
 
 
-// create LINE SDK config from env variables
 const config = {
 const config = {
   channelAccessToken: 'mnny0MJSezgBXzR9C3Ddcc1Csdb7Y9jkvy2nqV5saOmvR2YOJ1/kj/2M0CNsLA+57B2qDpdUQ7WbCTtIKx/LAJ6Kwfop4tX3up7EM8H9EZK1td6GMbhhCb6wvUFVdb1PcTO4joCv8mspd3ubo8a+gAdB04t89/1O/w1cDnyilFU=',
   channelAccessToken: 'mnny0MJSezgBXzR9C3Ddcc1Csdb7Y9jkvy2nqV5saOmvR2YOJ1/kj/2M0CNsLA+57B2qDpdUQ7WbCTtIKx/LAJ6Kwfop4tX3up7EM8H9EZK1td6GMbhhCb6wvUFVdb1PcTO4joCv8mspd3ubo8a+gAdB04t89/1O/w1cDnyilFU=',
   channelSecret: 'bde77633a16fc5bfbd532d5990c6170e',
   channelSecret: 'bde77633a16fc5bfbd532d5990c6170e',
 };
 };
 
 
+
 // create LINE SDK client
 // create LINE SDK client
 const client = new line.Client(config);
 const client = new line.Client(config);
 
 
 // create Express app
 // create Express app
 // about Express itself: https://expressjs.com/
 // about Express itself: https://expressjs.com/
-const app = express();
 
 
 // register a webhook handler with middleware
 // register a webhook handler with middleware
 // about the middleware, please refer to doc
 // about the middleware, please refer to doc
@@ -35,7 +37,7 @@ app.post('/webhook', line.middleware(config), (req, res) => {
     .then((result) => res.json(result))
     .then((result) => res.json(result))
     .catch((err) => {
     .catch((err) => {
       console.error(err);
       console.error(err);
-      res.status(500).end();
+      res.status(200).end();
     });
     });
 });
 });
 
 
@@ -46,33 +48,65 @@ function handleEvent(event) {
     return Promise.resolve(null);
     return Promise.resolve(null);
   }
   }
   return new Promise(function(resolve, reject) {
   return new Promise(function(resolve, reject) {
-        // Naver Papago Translate
-        var options = {
-            url:  translate_api_url,
-            // 한국어(source : ko), 영어(target: en), 카톡에서 받는 메시지(text)
-            form: {'source':'ko', 'target':'en', 'text':event.message.text},
-            headers: {'X-Naver-Client-Id': client_id, 'X-Naver-Client-Secret': client_secret}
-        };
-
-        // Naver Post API
-        request.post(options, function(error, response, body){
-            // Translate API Sucess
-            if(!error && response.statusCode == 200){
-                // JSON
-                var objBody = JSON.parse(response.body);
-                // Message 잘 찍히는지 확인
-
-                const result = { type: 'text', text: objBody.message.result.translatedText};
-                console.log(result.text);
-                client.replyMessage(event.replyToken,result).then(resolve).catch(reject);
-            }
-        });
-    });
-    // use reply API
-    //return client.replyMessage(event.replyToken,objBody.message.result.translatedText);
-  }
+    //언어 감지 option
+    var detect_options = {
+      url : languagedetect_api_url,
+      form : {'query': event.message.text},
+      headers: {'X-Naver-Client-Id': client_id, 'X-Naver-Client-Secret': client_secret}
+    };
+
+    //papago 언어 감지
+    request.post(detect_options,function(error,response,body){
+      console.log(response.statusCode);
+      if(!error && response.statusCode == 200){
+        var detect_body = JSON.parse(response.body);
+        var source = '';
+        var target = '';
+        var result = { type: 'text', text:''};
+
+        //언어 감지가 제대로 됐는지 확인
+        console.log(detect_body.langCode);
+
 
 
+        //번역은 한국어->영어 / 영어->한국어만 지원
+        if(detect_body.langCode == 'ko'||detect_body.langCode == 'en'){
+          source = detect_body.langCode == 'ko' ? 'ko':'en';
+          target = source == 'ko' ? 'en':'ko';
+          //papago 번역 option
+          var options = {
+              url:  translate_api_url,
+              // 한국어(source : ko), 영어(target: en), 카톡에서 받는 메시지(text)
+              form: {'source':source, 'target':target, 'text':event.message.text},
+              headers: {'X-Naver-Client-Id': client_id, 'X-Naver-Client-Secret': client_secret}
+          };
 
 
+          // Naver Post API
+          request.post(options, function(error, response, body){
+              // Translate API Sucess
+              if(!error && response.statusCode == 200){
+                  // JSON
+                  var objBody = JSON.parse(response.body);
+                  // Message 잘 찍히는지 확인
+
+                  result.text = objBody.message.result.translatedText;
+                  console.log(result.text);
+                  //번역된 문장 보내기
+                  client.replyMessage(event.replyToken,result).then(resolve).catch(reject);
+              }
+          });
+        }
+        // 메시지의 언어가 영어 또는 한국어가 아닐 경우
+        else{
+          result.text = '언어를 감지할 수 없습니다. \n 번역 언어는 한글 또는 영어만 가능합니다.';
+          client.replyMessage(event.replyToken,result).then(resolve).catch(reject);
+        }
+
+      }
+
+    });
+
+    });
+  }
 
 
 app.listen(3000, function () {
 app.listen(3000, function () {
   console.log('Linebot listening on port 3000!');
   console.log('Linebot listening on port 3000!');