Use AppCompat for Activity and Fragments

app/src/main/java/chat/rocket/android/app/ChatRoomActivity.kt

 package chat.rocket.android.app
 
 import android.os.Bundle
-import chat.rocket.android.BaseActivity
+import android.support.v7.app.AppCompatActivity
 import chat.rocket.android.R
 import chat.rocket.android.app.chatroom.MessageFragment
+import chat.rocket.android.util.addFragment
 
-class ChatRoomActivity : BaseActivity() {
+class ChatRoomActivity : AppCompatActivity() {
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_chat_room)
 
-        addFragment(MessageFragment(), "MessageFragment", R.id.fragment_container)
+        addFragment("MessageFragment", R.id.fragment_container) {
+            MessageFragment()
+        }
     }
 }
\ No newline at end of file

app/src/main/java/chat/rocket/android/app/chatroom/MessageFragment.kt

 package chat.rocket.android.app.chatroom
 
-import android.app.Fragment
 import android.os.Bundle
+import android.support.v4.app.Fragment
 import android.support.v7.widget.LinearLayoutManager
 import android.view.LayoutInflater
 import android.view.View
@@ -13,9 +13,9 @@ import org.threeten.bp.LocalDateTime
 
 class MessageFragment : Fragment() {
 
-    override fun onCreateView(inflater: LayoutInflater?, container: ViewGroup?, savedInstanceState: Bundle?): View? = inflater?.inflate(R.layout.fragment_message, container, false)
+    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? = inflater.inflate(R.layout.fragment_message, container, false)
 
-    override fun onViewCreated(view: View?, savedInstanceState: Bundle?) {
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
         showMessageList(createDumpData())
     }
@@ -32,7 +32,9 @@ class MessageFragment : Fragment() {
 
     // REMARK: The presenter should call this method.
     private fun showMessageList(dataSet: List<Message>) {
-        recycler_view.layoutManager = LinearLayoutManager(activity.applicationContext, LinearLayoutManager.VERTICAL, false)
-        recycler_view.adapter = MessageListAdapter(dataSet.toMutableList())
+        activity?.apply {
+            recycler_view.layoutManager = LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false)
+            recycler_view.adapter = MessageListAdapter(dataSet.toMutableList())
+        }
     }
 }
\ No newline at end of file

app/src/main/java/chat/rocket/android/server/infraestructure/ServerEntityMapper.kt

@@ -4,7 +4,7 @@ import chat.rocket.android.server.domain.model.Server
 import chat.rocket.android.util.DataToDomain
 
 class ServerEntityMapper : DataToDomain<ServerEntity, Server> {
-    override fun translate(serverEntity: ServerEntity): Server {
-        return Server(serverEntity.id, serverEntity.name, serverEntity.host, serverEntity.avatar)
+    override fun translate(data: ServerEntity): Server {
+        return Server(data.id, data.name, data.host, data.avatar)
     }
 }