이벤트가 이미지일때 텍스트일때

 var express = require('express');
 var app = express();
 const line = require('@line/bot-sdk');
+
 const config = require('./config');
 
 //papago api
@@ -12,149 +13,100 @@ var translate_api_url = 'https://openapi.naver.com/v1/papago/n2mt';
 //언어감지 api_url
 var languagedetect_api_url = 'https://openapi.naver.com/v1/papago/detectLangs';
 
-//eng grammar check
-
-var EnGrammarCheck_api_url = 'https://api.textgears.com/check.php';
-
-import textgears from 'textgears';
-
-textgears({
-  key: '9WUGcY6ZayYMphG7',
-  text: prompt('Text'),
-}).then(res => {
-  for (const error of res.errors) {
-    console.log('Bad: %s. Better: %s', error.bad, error.better.join(', '));
-  }
-});
 
 // create LINE SDK client
-const client = new line.Client(config.line_config);
+const client = new line.Client(config);
 
 // create Express app
 // about Express itself: https://expressjs.com/
-
 // register a webhook handler with middleware
 // about the middleware, please refer to doc
-app.post('/webhook', line.middleware(config), (req, res) => {
-  Promise
-    .all(req.body.events.map(handleEvent))
-    .then((result) => res.json(result))
-    .catch((err) => {
-      console.error(err);      res.status(200).end();
-    });
-});
-
-// Imports the Google Cloud client library
-const vision = require('@google-cloud/vision');
-
-// Creates a client
-const client = new vision.ImageAnnotatorClient();
-
-/**
- * TODO(developer): Uncomment the following line before running the sample.
- */
-// const fileName = 'Local image file, e.g. /path/to/image.png';
-
-// Read a local image as a text document
-const [result] = await client.documentTextDetection(fileName);
-const fullTextAnnotation = result.fullTextAnnotation;
-//console.log(`Full text: ${fullTextAnnotation.text}`);
-fullTextAnnotation.pages.forEach(page => {
-      paragraph.words.forEach(word => {
-        const wordText = word.symbols.map(s => s.text).join('');
-      //  console.log(`Word text: ${wordText}`);
-
-        word.symbols.forEach(symbol => {
-        //  console.log(`Symbol text: ${symbol.text}`);
-
-        });
-      });
+app.post("/webhook", line.middleware(config.line_config), (req, res) => {
+  // res.status(200).end();
+  Promise.all(req.body.events.map(handleEvent)).then(result =>
+      res.json(result)
+  );
 });
 
-const vision = require('@google-cloud/vision');
-
-// Creates a client
-const client = new vision.ImageAnnotatorClient();
-
-/**
- * TODO(developer): Uncomment the following line before running the sample.
- */
-// const fileName = 'Local image file, e.g. /path/to/image.png';
-
-// Performs text detection on the local file
-const [result] = await client.textDetection(fileName);
-const detections = result.textAnnotations;
-//console.log('Text:');
-detections.forEach(text => console.log(text));
-
-
-// event handler
-function handleEvent(event) {
-  if (event.type !== 'message' || event.message.type !== 'text') {
-    // ignore non-text-message event
-    return Promise.resolve(null);
-  }
-  return new Promise(function(resolve, reject) {
-    //언어 감지 option
-    var detect_options = {
-      url : languagedetect_api_url,
-      form : {'query': event.message.text},
-      headers: config.naver_header
-    };
-
-    //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,
+function handleImgEvent(event) {
+
+  switch (event) {
+    case event.type = 'image':
+    async function detectText(fileName) {
+      // [START vision_text_detection]
+      const vision = require('@google-cloud/vision');
+
+      // Creates a client
+      const client = new vision.ImageAnnotatorClient();
+
+      /**
+       * TODO(developer): Uncomment the following line before running the sample.
+       */
+          // const fileName = 'Local image file, e.g. /path/to/image.png';
+
+          // Performs text detection on the local file
+      const [result] = await client.textDetection(fileName);
+      const detections = result.textAnnotations;
+      console.log('Text:');
+      detections.forEach(text => console.log(text));
+      // [END vision_text_detection]
+    }
+      break;
+    case event.type = 'message':
+      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}
+      }
+      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: config.naver_header
-          };
+              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){
+            // 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);
+              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);
-        }
-
-      }
+            });
+          }
+          // 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);
+          }
+          break;
 
-    });
 
-    });
+        }
+      })
   }
-
+}
 app.listen(3000, function () {
   console.log('Linebot listening on port 3000!');
-});
+})