Edit Template 4 - payload.substr

 let request = require('request'),
     template = require('./template');
 
-// Views - handle Message, handle Postback
-
 // Handles message events
 exports.handleMessage = (sender_psid, received_message) => {
-  let payload = recieved_message.payload;
-
-  if(payload === 'CHOICE_BY_PROF'){
-	  handlePostback_choiceByProf(sender_psid, received_message);
-  }else if(payload === 'CHOICE_BY_LECT'){
-	  handlePostback_choiceByLect(sender_psid, recieved_message);
-  }else if(payload === 'HELP'){
-	  handlePostback_help(sender_psid, recieved_message);
-  }
 }
 
 exports.handlePostback = (sender_psid, received_postback) => {
@@ -26,14 +15,11 @@ exports.handlePostback = (sender_psid, received_postback) => {
   if(payload === 'Greeting'){
 	  response = template.greetingTemplate();
 	  callSendAPI(sender_psid, response);
-  }
-	
-  let first_choice = payload.first_choice;
-  if(first_choice=== 'CHOICE_BY_PROF'){
+  }else if(payload.substr(0,14)=== 'CHOICE_BY_PROF'){
 	  handlePostback_choiceByProf(sender_psid, received_postback);
-  }else if(first_choice=== 'CHOICE_BY_LECT'){
+  }else if(payload.substr(0,14)=== 'CHOICE_BY_LECT'){
 	  handlePostback_choiceByLect(sender_psid, recieved_postback);
-  }else if(first_choice=== 'HELP'){
+  }else if(payload.substr(0,14) ==='CHOICE_BY_HELP'){
 	  handlePostback_help(sender_psid, recieved_postback);
   }
 }
@@ -41,7 +27,7 @@ exports.handlePostback = (sender_psid, received_postback) => {
 const handlePostback_choiceByProf = (sender_psid, received) => {
   let response;
 
-  let stat = received.payload.stat;
+  let stat = received.payload.substr(14);
 
   if(stat === 'stat_0'){
 	  response = template.getProfNameTemplate(received);
@@ -56,7 +42,7 @@ const handlePostback_choiceByProf = (sender_psid, received) => {
 const handlePostback_choiceByLect = (sender_psid, recieved) => {
   let response;
 
-  let stat = recieved.stat;
+  let stat = recieved.payload.substr(14);
 
   if(stat === 'stat_0'){
 	  response = template.getLectNameTemplate(received);
@@ -75,7 +61,7 @@ const handlePostback_choiceByLect = (sender_psid, recieved) => {
 const handlePostback_help = (sender_psid, received) => {
   let response;
 
-  let stat = received.stat;
+  let stat = received.payload.substr(14);
 
   if(stat === 'stat_0'){
 	  response = template.howToTemplate(received);

@@ -13,26 +13,17 @@ exports.greetingTemplate = () => {
           {
             "type":"postback",
             "title":greetingTitle[0],
-            "payload":{
-		    first_choice:"CHOICE_BY_PROF",
-		    stat:"stat_0"
-	    }
+            "payload":"CHOICE_BY_PROFstat_0"
           },
           {
             "type":"postback",
             "title":greetingTitle[1],
-            "payload":{
-		    first_choice:"CHOICE_BY_LECT",
-		    stat: "stat_0"
-	    }
+            "payload":"CHOICE_BY_LECTstat_0"
           },
           {
             "type":"postback",
             "title":greetingTitle[2],
-            "payload":{
-		    first_choice:"HELP",
-		    stat: "stat_0"
-	    }
+            "payload":"CHOICE_BY_HELPstat_0"
           }
         ]
       }
@@ -52,11 +43,12 @@ exports.getProfNameTemplate = (received) => {
           {
 	    "type":"postback",
 	    "title":"처음으로",
-	    "payload":{
-		    first_choice:'Greeting',
-		    stat:'stat_0',
-		    rate:{}
-	    }
+	    "payload":'Greeting'
+	  },
+	  {
+	    "type":"postback",
+	    "title":"stat_1로",
+	    "payload":"CHOICE_BY_PROFstat_1"
 	  }
 	]
       }