WebApp: Add ability to get prev. chat history

TugasBesar2_2017/WebApp/src/main/webapp/js/converse.js

@@ -41,8 +41,8 @@ let converse = function ($http) {
           'token': await messaging.getToken()
         })
 
-        console.log(data)
-        await $http.post(`${apiUrl}/driver/${this.id}/chat/init`, data)
+        let response = await $http.post(`${apiUrl}/driver/${this.id}/chat/init`, data)
+        return response.chats
       } catch (e) {
         console.log(e)
         alert('Unable to initialize chat service.')