Implemented ability to clear chat

app/src/main/java/io/github/chronosx88/influence/contracts/CoreContracts.kt

@@ -18,6 +18,7 @@ package io.github.chronosx88.influence.contracts
 
 import android.content.Context
 import android.content.Intent
+import android.view.MenuItem
 import com.stfalcon.chatkit.dialogs.DialogsListAdapter
 import com.stfalcon.chatkit.messages.MessagesListAdapter
 
@@ -86,6 +87,7 @@ interface CoreContracts {
         fun sendMessage(text: String): Boolean
         fun loadLocalMessages()
         fun onDestroy()
+        fun onOptionsItemSelected(item: MenuItem)
     }
 
     interface IChatViewContract {

app/src/main/java/io/github/chronosx88/influence/helpers/LocalDBWrapper.java

@@ -88,4 +88,8 @@ public class LocalDBWrapper {
     public static void updateChatUnreadMessagesCount(String chatID, int unreadMessagesCount) {
         dbInstance.chatDao().updateUnreadMessagesCount(chatID, unreadMessagesCount);
     }
+
+    public static void clearChat(String chatID) {
+        dbInstance.messageDao().clearMessagesByChatID(chatID);
+    }
 }

app/src/main/java/io/github/chronosx88/influence/models/daos/MessageDao.java

@@ -48,6 +48,9 @@ public interface MessageDao {
     @Query("DELETE FROM messages")
     void clearMessages();
 
+    @Query("DELETE FROM messages WHERE jid = :chatID")
+    void clearMessagesByChatID(String chatID);
+
     @Query("SELECT messageID FROM messages WHERE jid = :chatID GROUP BY :chatID HAVING MAX(messageID)")
     long getLastMessageByChatID(String chatID);
 }

app/src/main/java/io/github/chronosx88/influence/presenters/ChatPresenter.kt

@@ -16,6 +16,7 @@
 
 package io.github.chronosx88.influence.presenters
 
+import android.view.MenuItem
 import com.google.gson.Gson
 import com.stfalcon.chatkit.messages.MessageHolders
 import com.stfalcon.chatkit.messages.MessagesListAdapter
@@ -112,4 +113,14 @@ class ChatPresenter(private val view: CoreContracts.IChatViewContract, private v
             })
         }
     }
+
+    override fun onOptionsItemSelected(item: MenuItem) {
+        when (item.itemId) {
+            R.id.menu_clear_chat -> {
+                LocalDBWrapper.clearChat(chatID)
+                chatAdapter.clear()
+                EventBus.getDefault().post(LastMessageEvent(chatID, null))
+            }
+        }
+    }
 }

app/src/main/java/io/github/chronosx88/influence/views/ChatActivity.kt

@@ -19,6 +19,7 @@ package io.github.chronosx88.influence.views
 import android.content.Intent
 import android.graphics.BitmapFactory
 import android.os.Bundle
+import android.view.Menu
 import android.view.MenuItem
 import android.widget.ImageView
 import android.widget.TextView
@@ -34,6 +35,7 @@ import com.stfalcon.chatkit.messages.MessagesListAdapter
 import io.github.chronosx88.influence.R
 import io.github.chronosx88.influence.contracts.CoreContracts
 import io.github.chronosx88.influence.helpers.AppHelper
+import io.github.chronosx88.influence.helpers.LocalDBWrapper
 import io.github.chronosx88.influence.models.GenericMessage
 import io.github.chronosx88.influence.models.roomEntities.MessageEntity
 import io.github.chronosx88.influence.presenters.ChatPresenter
@@ -59,12 +61,12 @@ class ChatActivity : AppCompatActivity(), CoreContracts.IChatViewContract {
         supportActionBar!!.setTitle("")
         supportActionBar!!.setDisplayHomeAsUpEnabled(true)
         supportActionBar!!.setHomeButtonEnabled(true)
-        messageList = findViewById(R.id.messages_list)
+        messageList = find(R.id.messages_list)
         messageList!!.layoutManager = LinearLayoutManager(this)
         chatNameTextView = find(R.id.appbar_username)
         userStatus = find(R.id.user_status_text)
-        chatAvatar = findViewById(R.id.profile_image_chat_activity)
+        chatAvatar = find(R.id.profile_image_chat_activity)
-        messageInput = findViewById(R.id.message_input)
+        messageInput = find(R.id.message_input)
         messageInput!!.setInputListener {
             presenter!!.sendMessage(it.toString())
         }
@@ -81,6 +83,7 @@ class ChatActivity : AppCompatActivity(), CoreContracts.IChatViewContract {
                 return true
             }
         }
+        presenter!!.onOptionsItemSelected(item)
         return super.onOptionsItemSelected(item)
     }
 
@@ -114,4 +117,11 @@ class ChatActivity : AppCompatActivity(), CoreContracts.IChatViewContract {
     override fun setUserStatus(status: String) {
         userStatus!!.text = status
     }
+
+    override fun onCreateOptionsMenu(menu: Menu): Boolean {
+        menuInflater.inflate(R.menu.chat_activity_menu, menu)
+        return true
+    }
+
+
 }

app/src/main/res/menu/chat_activity_menu.xml

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~    Copyright 2019 ChronosX88
+  ~
+  ~    Licensed under the Apache License, Version 2.0 (the "License");
+  ~    you may not use this file except in compliance with the License.
+  ~    You may obtain a copy of the License at
+  ~
+  ~        http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~    Unless required by applicable law or agreed to in writing, software
+  ~    distributed under the License is distributed on an "AS IS" BASIS,
+  ~    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~    See the License for the specific language governing permissions and
+  ~    limitations under the License.
+  -->
+
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+    <item
+        android:id="@+id/menu_clear_chat"
+        app:showAsAction="never"
+        android:title="@string/clear_chat">
+    </item>
+</menu>

app/src/main/res/values-ru-rRU/strings.xml

@@ -26,4 +26,5 @@
     <string name="invalid_jid_error">Неверный JabberID!</string>
     <string name="offline">Не в сети</string>
     <string name="online">В сети</string>
+    <string name="clear_chat">Очистить чат</string>
 </resources>

app/src/main/res/values/strings.xml

@@ -25,4 +25,5 @@
     <string name="invalid_jid_error">Invalid JabberID!</string>
     <string name="offline">Offline</string>
     <string name="online">Online</string>
+    <string name="clear_chat">Clear chat</string>
 </resources>