From 2680a86ba8f4200a7df33e34de505afb95239c28 Mon Sep 17 00:00:00 2001
From: ChronosX88 <chronosx88@gmail.com>
Date: Thu, 21 Mar 2019 19:02:34 +0400
Subject: [PATCH] Made creating chat system. Added KeyPairManager

---
 .idea/gradle.xml                              |  3 -
 app/build.gradle                              |  1 +
 .../chatlist/ChatListLogicContract.java       |  1 -
 .../influence/helpers/KeyPairManager.java     | 73 +++++++++++++++++++
 .../influence/helpers/NetworkHandler.java     | 12 +--
 .../influence/logic/ChatListLogic.java        | 29 +-------
 .../chronosx88/influence/logic/MainLogic.java | 41 +----------
 .../influence/logic/StartChatLogic.java       | 35 +++++++--
 .../models/roomEntities/ChatEntity.java       |  8 +-
 .../presenters/ChatListPresenter.java         | 18 ++++-
 .../presenters/StartChatPresenter.java        |  2 +-
 .../views/fragments/ChatListFragment.java     |  2 +
 12 files changed, 139 insertions(+), 86 deletions(-)
 create mode 100644 app/src/main/java/io/github/chronosx88/influence/helpers/KeyPairManager.java

diff --git a/.idea/gradle.xml b/.idea/gradle.xml
index f43d428..7ac24c7 100644
--- a/.idea/gradle.xml
+++ b/.idea/gradle.xml
@@ -3,9 +3,6 @@
   <component name="GradleSettings">
     <option name="linkedExternalProjectsSettings">
       <GradleProjectSettings>
-        <compositeConfiguration>
-          <compositeBuild compositeDefinitionSource="SCRIPT" />
-        </compositeConfiguration>
         <option name="distributionType" value="DEFAULT_WRAPPED" />
         <option name="externalProjectPath" value="$PROJECT_DIR$" />
         <option name="modules">
diff --git a/app/build.gradle b/app/build.gradle
index 46e066b..6fdf2e1 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -44,4 +44,5 @@ dependencies {
     implementation 'com.google.android.material:material:1.1.0-alpha04'
     implementation 'androidx.preference:preference:1.1.0-alpha03'
     implementation 'com.google.code.gson:gson:2.8.5'
+    //implementation group: 'com.github.demidenko05', name: 'a-javabeans', version: '1.0.4'
 }
diff --git a/app/src/main/java/io/github/chronosx88/influence/contracts/chatlist/ChatListLogicContract.java b/app/src/main/java/io/github/chronosx88/influence/contracts/chatlist/ChatListLogicContract.java
index 7a60e99..a618335 100644
--- a/app/src/main/java/io/github/chronosx88/influence/contracts/chatlist/ChatListLogicContract.java
+++ b/app/src/main/java/io/github/chronosx88/influence/contracts/chatlist/ChatListLogicContract.java
@@ -6,5 +6,4 @@ import io.github.chronosx88.influence.models.roomEntities.ChatEntity;
 
 public interface ChatListLogicContract {
     List<ChatEntity> loadAllChats();
-    void createChatBySender(ChatEntity entity);
 }
diff --git a/app/src/main/java/io/github/chronosx88/influence/helpers/KeyPairManager.java b/app/src/main/java/io/github/chronosx88/influence/helpers/KeyPairManager.java
new file mode 100644
index 0000000..1808feb
--- /dev/null
+++ b/app/src/main/java/io/github/chronosx88/influence/helpers/KeyPairManager.java
@@ -0,0 +1,73 @@
+package io.github.chronosx88.influence.helpers;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.security.KeyPair;
+import java.security.KeyPairGenerator;
+import java.security.NoSuchAlgorithmException;
+
+public class KeyPairManager {
+    private File keyPairDir;
+
+    public KeyPairManager() {
+        this.keyPairDir = new File(AppHelper.getContext().getFilesDir().getAbsoluteFile(), "keyPairs");
+    }
+
+    public KeyPair openMainKeyPair() {
+        return getKeyPair("mainKeyPair");
+    }
+
+    public KeyPair getKeyPair(String keyPairName) {
+        KeyPair keyPair = null;
+        keyPairName = keyPairName + ".kp";
+        File keyPairFile = new File(keyPairDir, keyPairName);
+        if (!keyPairFile.exists()) {
+            return createKeyPairFile(keyPairFile);
+        }
+        return openKeyPairFile(keyPairFile);
+    }
+
+    private synchronized KeyPair openKeyPairFile(File keyPairFile) {
+        KeyPair keyPair = null;
+        try {
+            FileInputStream inputStream = new FileInputStream(keyPairFile);
+            byte[] serializedKeyPair = new byte[(int) keyPairFile.length()];
+            inputStream.read(serializedKeyPair);
+            inputStream.close();
+            keyPair = Serializer.deserializeObject(new String(serializedKeyPair, StandardCharsets.UTF_8));
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return keyPair;
+    }
+
+    private synchronized KeyPair createKeyPairFile(File keyPairFile) {
+        KeyPair keyPair = null;
+        try {
+            keyPairFile.createNewFile();
+            keyPair = KeyPairGenerator.getInstance("RSA").generateKeyPair();
+            FileOutputStream outputStream = new FileOutputStream(keyPairFile);
+            outputStream.write(Serializer.serializeObject(keyPair).getBytes(StandardCharsets.UTF_8));
+            outputStream.close();
+        } catch (IOException | NoSuchAlgorithmException e) {
+            e.printStackTrace();
+        }
+        return keyPair;
+    }
+
+    public synchronized void saveKeyPair(String keyPairID, KeyPair keyPair) {
+        File keyPairFile = new File(keyPairDir, keyPairID + ".kp");
+        if(!keyPairFile.exists()) {
+            try {
+                FileOutputStream outputStream = new FileOutputStream(keyPairFile);
+                outputStream.write(Serializer.serializeObject(keyPair).getBytes(StandardCharsets.UTF_8));
+                outputStream.close();
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+        }
+    }
+}
diff --git a/app/src/main/java/io/github/chronosx88/influence/helpers/NetworkHandler.java b/app/src/main/java/io/github/chronosx88/influence/helpers/NetworkHandler.java
index ae117c6..1e063cf 100644
--- a/app/src/main/java/io/github/chronosx88/influence/helpers/NetworkHandler.java
+++ b/app/src/main/java/io/github/chronosx88/influence/helpers/NetworkHandler.java
@@ -9,6 +9,7 @@ import net.tomp2p.peers.PeerAddress;
 import io.github.chronosx88.influence.contracts.observer.Observer;
 import io.github.chronosx88.influence.helpers.actions.NetworkActions;
 import io.github.chronosx88.influence.helpers.actions.UIActions;
+import io.github.chronosx88.influence.models.roomEntities.ChatEntity;
 import io.github.chronosx88.influence.observable.MainObservable;
 
 public class NetworkHandler implements Observer {
@@ -27,7 +28,7 @@ public class NetworkHandler implements Observer {
             switch (object.get("action").getAsInt()) {
                 case NetworkActions.START_CHAT: {
                     String chatStarterPlainAddress = object.get("senderAddress").getAsString();
-                    createChatEntry(object.get("chatID").getAsString(), chatStarterPlainAddress);
+                    createChatEntry(object.get("chatID").getAsString(), object.get("senderID").getAsString(), chatStarterPlainAddress);
                     handleIncomingChat(object.get("chatID").getAsString(), PrepareData.prepareFromStore(chatStarterPlainAddress));
                     JsonObject jsonObject = new JsonObject();
                     jsonObject.addProperty("action", UIActions.NEW_CHAT);
@@ -36,9 +37,9 @@ public class NetworkHandler implements Observer {
                 }
 
                 case NetworkActions.SUCCESSFULL_CREATE_CHAT: {
-                    createChatEntry(object.get("chatID").getAsString(), object.get("senderAddress").getAsString());
+                    createChatEntry(object.get("chatID").getAsString(), object.get("senderID").getAsString(), object.get("senderAddress").getAsString());
                     JsonObject jsonObject = new JsonObject();
-                    jsonObject.addProperty("action", UIActions.SUCCESSFULL_CREATE_CHAT);
+                    jsonObject.addProperty("action", UIActions.NEW_CHAT);
                     AppHelper.getObservable().notifyObservers(jsonObject, MainObservable.UI_ACTIONS_CHANNEL);
                     break;
                 }
@@ -46,14 +47,15 @@ public class NetworkHandler implements Observer {
         }).start();
     }
 
-    private void createChatEntry(String chatID, String peerAddress) {
-        // TODO: make saving chat in db
+    private void createChatEntry(String chatID, String name, String peerAddress) {
+        AppHelper.getChatDB().chatDao().addChat(new ChatEntity(chatID, name, peerAddress, ""));
     }
 
     private void handleIncomingChat(String chatID, PeerAddress chatStarterAddress) {
         JsonObject jsonObject = new JsonObject();
         jsonObject.addProperty("action", NetworkActions.SUCCESSFULL_CREATE_CHAT);
         jsonObject.addProperty("chatID", chatID);
+        jsonObject.addProperty("senderID", AppHelper.getPeerID());
         jsonObject.addProperty("senderAddress", PrepareData.prepareToStore(peerDHT.peerAddress()));
         AppHelper.getPeerDHT().peer().sendDirect(chatStarterAddress).object(gson.toJson(jsonObject)).start().awaitUninterruptibly();
     }
diff --git a/app/src/main/java/io/github/chronosx88/influence/logic/ChatListLogic.java b/app/src/main/java/io/github/chronosx88/influence/logic/ChatListLogic.java
index 3b6c7ea..1834ff3 100644
--- a/app/src/main/java/io/github/chronosx88/influence/logic/ChatListLogic.java
+++ b/app/src/main/java/io/github/chronosx88/influence/logic/ChatListLogic.java
@@ -1,42 +1,15 @@
 package io.github.chronosx88.influence.logic;
 
-import com.google.gson.JsonObject;
-
 import java.util.List;
 
 import io.github.chronosx88.influence.contracts.chatlist.ChatListLogicContract;
-import io.github.chronosx88.influence.contracts.observer.Observer;
 import io.github.chronosx88.influence.helpers.AppHelper;
-import io.github.chronosx88.influence.helpers.actions.NetworkActions;
-import io.github.chronosx88.influence.helpers.actions.UIActions;
 import io.github.chronosx88.influence.models.roomEntities.ChatEntity;
-import io.github.chronosx88.influence.observable.MainObservable;
 
-public class ChatListLogic implements ChatListLogicContract, Observer {
-    public ChatListLogic() {
-        AppHelper.getObservable().register(this, MainObservable.OTHER_ACTIONS_CHANNEL);
-    }
+public class ChatListLogic implements ChatListLogicContract {
 
     @Override
     public List<ChatEntity> loadAllChats() {
         return AppHelper.getChatDB().chatDao().getAllChats();
     }
-
-    @Override
-    public void handleEvent(JsonObject object) {
-        switch (object.get("action").getAsInt()) {
-            case NetworkActions.START_CHAT: {
-                createChatBySender(new ChatEntity(object.get("chatID").getAsString(), object.get("name").getAsString(), ""));
-                JsonObject jsonObject = new JsonObject();
-                jsonObject.addProperty("action", UIActions.NEW_CHAT);
-                AppHelper.getObservable().notifyObservers(jsonObject, MainObservable.UI_ACTIONS_CHANNEL);
-                break;
-            }
-        }
-    }
-
-    @Override
-    public void createChatBySender(ChatEntity entity) {
-        AppHelper.getChatDB().chatDao().addChat(entity);
-    }
 }
diff --git a/app/src/main/java/io/github/chronosx88/influence/logic/MainLogic.java b/app/src/main/java/io/github/chronosx88/influence/logic/MainLogic.java
index 4cc8905..b6ac3a4 100644
--- a/app/src/main/java/io/github/chronosx88/influence/logic/MainLogic.java
+++ b/app/src/main/java/io/github/chronosx88/influence/logic/MainLogic.java
@@ -25,21 +25,16 @@ import net.tomp2p.storage.Data;
 
 import org.json.JSONObject;
 
-import java.io.File;
-import java.io.FileInputStream;
-import java.io.FileOutputStream;
 import java.io.IOException;
 import java.net.Inet4Address;
 import java.net.InetAddress;
 import java.net.UnknownHostException;
 import java.nio.charset.StandardCharsets;
-import java.security.KeyPair;
-import java.security.KeyPairGenerator;
-import java.security.NoSuchAlgorithmException;
 import java.util.UUID;
 
 import io.github.chronosx88.influence.contracts.main.MainLogicContract;
 import io.github.chronosx88.influence.helpers.AppHelper;
+import io.github.chronosx88.influence.helpers.KeyPairManager;
 import io.github.chronosx88.influence.helpers.Serializer;
 import io.github.chronosx88.influence.helpers.StorageMVStore;
 import io.github.chronosx88.influence.helpers.actions.NetworkActions;
@@ -57,11 +52,13 @@ public class MainLogic implements MainLogicContract {
     private PeerAddress bootstrapPeerAddress = null;
     private Gson gson;
     private AutoReplication replication;
+    private KeyPairManager keyPairManager;
 
     public MainLogic() {
         this.context = AppHelper.getContext();
         this.preferences = context.getSharedPreferences("io.github.chronosx88.influence_preferences", context.MODE_PRIVATE);
         gson = new Gson();
+        keyPairManager = new KeyPairManager();
     }
 
     @Override
@@ -135,7 +132,7 @@ public class MainLogic implements MainLogicContract {
                 Gson gson = new Gson();
                 JsonObject publicProfile = new JsonObject();
                 publicProfile.addProperty("peerAddress", Base64.encodeToString(Serializer.serializeObject(peerDHT.peerAddress()).getBytes(StandardCharsets.UTF_8), Base64.URL_SAFE));
-                peerDHT.put(Number160.createHash(preferences.getString("peerID", null) + "_profile")).data(new Data(gson.toJson(publicProfile)).protectEntry(createMainKeyPair())).start().awaitUninterruptibly();
+                peerDHT.put(Number160.createHash(preferences.getString("peerID", null) + "_profile")).data(new Data(gson.toJson(publicProfile)).protectEntry(keyPairManager.openMainKeyPair())).start().awaitUninterruptibly();
                 replication = new AutoReplication(peerDHT.peer()).start();
             } catch (IOException e) {
                 e.printStackTrace();
@@ -214,34 +211,4 @@ public class MainLogic implements MainLogicContract {
         }
         return false;
     }
-
-    private KeyPair createMainKeyPair() {
-        KeyPair kp = null;
-        try {
-            File keyPairDir = new File(AppHelper.getContext().getFilesDir().getAbsoluteFile(), "keyPairs");
-            if (!keyPairDir.exists())
-                keyPairDir.mkdir();
-            File mainKeyPairFile = new File(keyPairDir, "mainKeyPair.kp");
-            if (!mainKeyPairFile.exists()) {
-                mainKeyPairFile.createNewFile();
-                try {
-                    kp = KeyPairGenerator.getInstance("RSA").generateKeyPair();
-                } catch (NoSuchAlgorithmException e) {
-                    e.printStackTrace();
-                }
-                FileOutputStream outputStream = new FileOutputStream(mainKeyPairFile);
-                outputStream.write(Serializer.serializeObject(kp).getBytes(StandardCharsets.UTF_8));
-                outputStream.close();
-                return kp;
-            }
-            FileInputStream inputStream = new FileInputStream(mainKeyPairFile);
-            byte[] serializedKeyPair = new byte[(int) mainKeyPairFile.length()];
-            inputStream.read(serializedKeyPair);
-            inputStream.close();
-            kp = Serializer.deserializeObject(new String(serializedKeyPair, StandardCharsets.UTF_8));
-        } catch (IOException e) {
-            e.printStackTrace();
-        }
-        return kp;
-    }
 }
diff --git a/app/src/main/java/io/github/chronosx88/influence/logic/StartChatLogic.java b/app/src/main/java/io/github/chronosx88/influence/logic/StartChatLogic.java
index 9f3b3ba..e0369be 100644
--- a/app/src/main/java/io/github/chronosx88/influence/logic/StartChatLogic.java
+++ b/app/src/main/java/io/github/chronosx88/influence/logic/StartChatLogic.java
@@ -1,16 +1,19 @@
 package io.github.chronosx88.influence.logic;
 
 import android.util.Base64;
+import android.util.Log;
 
 import com.google.gson.Gson;
 import com.google.gson.JsonObject;
 import com.google.gson.JsonParser;
 
 import net.tomp2p.dht.FutureGet;
+import net.tomp2p.dht.FuturePut;
 import net.tomp2p.dht.PeerDHT;
 import net.tomp2p.futures.FuturePing;
 import net.tomp2p.peers.Number160;
 import net.tomp2p.peers.PeerAddress;
+import net.tomp2p.storage.Data;
 
 import java.io.IOException;
 import java.nio.charset.StandardCharsets;
@@ -18,6 +21,7 @@ import java.util.UUID;
 
 import io.github.chronosx88.influence.contracts.startchat.StartChatLogicContract;
 import io.github.chronosx88.influence.helpers.AppHelper;
+import io.github.chronosx88.influence.helpers.KeyPairManager;
 import io.github.chronosx88.influence.helpers.PrepareData;
 import io.github.chronosx88.influence.helpers.Serializer;
 import io.github.chronosx88.influence.helpers.actions.NetworkActions;
@@ -27,10 +31,13 @@ import io.github.chronosx88.influence.observable.MainObservable;
 public class StartChatLogic implements StartChatLogicContract {
     private PeerDHT peerDHT;
     private Gson gson;
+    private KeyPairManager keyPairManager;
+    private final static String LOG_TAG = "StartChatLogic";
 
     public StartChatLogic() {
         peerDHT = AppHelper.getPeerDHT();
         gson = new Gson();
+        keyPairManager = new KeyPairManager();
     }
 
     @Override
@@ -45,16 +52,32 @@ public class StartChatLogic implements StartChatLogicContract {
             }
             String peerAddressString = recipientPublicProfile.get("peerAddress").getAsString();
             PeerAddress peerAddress = Serializer.deserializeObject(new String(Base64.decode(peerAddressString, Base64.URL_SAFE), StandardCharsets.UTF_8));
+            String chatID = UUID.randomUUID().toString();
+
+            JsonObject jsonObject = new JsonObject();
+            jsonObject.addProperty("action", NetworkActions.START_CHAT);
+            jsonObject.addProperty("chatID", chatID);
+            jsonObject.addProperty("senderID", AppHelper.getPeerID());
+            // TODO: Append public key to new chat request (for encryption)
+            jsonObject.addProperty("senderAddress", PrepareData.prepareToStore(peerDHT.peerAddress()));
+
             FuturePing ping = peerDHT.peer().ping().peerAddress(peerAddress).start().awaitUninterruptibly();
             if(ping.isSuccess()) {
-                JsonObject jsonObject = new JsonObject();
-                jsonObject.addProperty("action", NetworkActions.START_CHAT);
-                jsonObject.addProperty("chatID", UUID.randomUUID().toString());
-                // TODO: Append public key to new chat request (for encryption)
-                jsonObject.addProperty("senderAddress", PrepareData.prepareToStore(peerDHT.peerAddress()));
                 peerDHT.peer().sendDirect(peerAddress).object(gson.toJson(jsonObject)).start();
             } else {
-                // TODO: put chat entry to "*peerID*_newChats". That peer later will fetch this new chats
+                try {
+                    FuturePut futurePut = peerDHT
+                            .put(Number160.createHash(peerID))
+                            .data(Number160.createHash(UUID.randomUUID().toString()), new Data(gson.toJson(jsonObject))
+                                    .protectEntry(keyPairManager.openMainKeyPair())).start().awaitUninterruptibly();
+                    if(futurePut.isSuccess()) {
+                        Log.i(LOG_TAG, "# Create new offline chat request is successful! ChatID: " + chatID);
+                    } else {
+                        Log.e(LOG_TAG, "# Failed to create chat: " + futurePut.failedReason());
+                    }
+                } catch (IOException e) {
+                    e.printStackTrace();
+                }
             }
         }).start();
     }
diff --git a/app/src/main/java/io/github/chronosx88/influence/models/roomEntities/ChatEntity.java b/app/src/main/java/io/github/chronosx88/influence/models/roomEntities/ChatEntity.java
index 6476703..785d51e 100644
--- a/app/src/main/java/io/github/chronosx88/influence/models/roomEntities/ChatEntity.java
+++ b/app/src/main/java/io/github/chronosx88/influence/models/roomEntities/ChatEntity.java
@@ -8,9 +8,9 @@ import androidx.room.PrimaryKey;
 @Entity(tableName = "chats")
 public class ChatEntity {
     @NonNull @PrimaryKey String id;
-    @ColumnInfo  String name;
-    @ColumnInfo String peerAddresses;
-    @ColumnInfo String keyPairID;
+    @ColumnInfo public String name;
+    @ColumnInfo public String peerAddresses;
+    @ColumnInfo public String keyPairID;
 
     public ChatEntity(String id, String name, String peerAddresses, String keyPairID) {
         this.id = id;
@@ -27,7 +27,7 @@ public class ChatEntity {
         return keyPairID;
     }
 
-    public String getPeerAddress() { return  peerAddresses; }
+    public String getPeerAddress() { return peerAddresses; }
 
     public String getName() {
         return name;
diff --git a/app/src/main/java/io/github/chronosx88/influence/presenters/ChatListPresenter.java b/app/src/main/java/io/github/chronosx88/influence/presenters/ChatListPresenter.java
index 94fd534..aaf2985 100644
--- a/app/src/main/java/io/github/chronosx88/influence/presenters/ChatListPresenter.java
+++ b/app/src/main/java/io/github/chronosx88/influence/presenters/ChatListPresenter.java
@@ -1,12 +1,18 @@
 package io.github.chronosx88.influence.presenters;
 
+import com.google.gson.JsonObject;
+
 import io.github.chronosx88.influence.contracts.chatlist.ChatListLogicContract;
 import io.github.chronosx88.influence.contracts.chatlist.ChatListPresenterContract;
 import io.github.chronosx88.influence.contracts.chatlist.ChatListViewContract;
+import io.github.chronosx88.influence.contracts.observer.Observer;
+import io.github.chronosx88.influence.helpers.AppHelper;
 import io.github.chronosx88.influence.helpers.ChatListAdapter;
+import io.github.chronosx88.influence.helpers.actions.UIActions;
 import io.github.chronosx88.influence.logic.ChatListLogic;
+import io.github.chronosx88.influence.observable.MainObservable;
 
-public class ChatListPresenter implements ChatListPresenterContract {
+public class ChatListPresenter implements ChatListPresenterContract, Observer {
     private ChatListViewContract view;
     private ChatListLogicContract logic;
     private ChatListAdapter chatListAdapter;
@@ -16,6 +22,7 @@ public class ChatListPresenter implements ChatListPresenterContract {
         chatListAdapter = new ChatListAdapter();
         this.logic = new ChatListLogic();
         this.view.setRecycleAdapter(chatListAdapter);
+        AppHelper.getObservable().register(this, MainObservable.UI_ACTIONS_CHANNEL);
     }
 
     @Override
@@ -28,4 +35,13 @@ public class ChatListPresenter implements ChatListPresenterContract {
     public void openChat(String chatID) {
         // TODO
     }
+
+    @Override
+    public void handleEvent(JsonObject object) {
+        switch (object.get("action").getAsInt()) {
+            case UIActions.NEW_CHAT: {
+                updateChatList();
+            }
+        }
+    }
 }
diff --git a/app/src/main/java/io/github/chronosx88/influence/presenters/StartChatPresenter.java b/app/src/main/java/io/github/chronosx88/influence/presenters/StartChatPresenter.java
index f527732..d7e9c15 100644
--- a/app/src/main/java/io/github/chronosx88/influence/presenters/StartChatPresenter.java
+++ b/app/src/main/java/io/github/chronosx88/influence/presenters/StartChatPresenter.java
@@ -23,7 +23,7 @@ public class StartChatPresenter implements StartChatPresenterContract, Observer
 
     @Override
     public void startChatWithPeer(String peerID) {
-        // TODO
+        logic.sendStartChatMessage(peerID);
     }
 
     @Override
diff --git a/app/src/main/java/io/github/chronosx88/influence/views/fragments/ChatListFragment.java b/app/src/main/java/io/github/chronosx88/influence/views/fragments/ChatListFragment.java
index 36da478..522e581 100644
--- a/app/src/main/java/io/github/chronosx88/influence/views/fragments/ChatListFragment.java
+++ b/app/src/main/java/io/github/chronosx88/influence/views/fragments/ChatListFragment.java
@@ -10,6 +10,7 @@ import com.google.gson.JsonObject;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.fragment.app.Fragment;
+import androidx.recyclerview.widget.LinearLayoutManager;
 import androidx.recyclerview.widget.RecyclerView;
 import io.github.chronosx88.influence.R;
 import io.github.chronosx88.influence.contracts.chatlist.ChatListPresenterContract;
@@ -41,6 +42,7 @@ public class ChatListFragment extends Fragment implements ChatListViewContract,
     public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
         super.onViewCreated(view, savedInstanceState);
         chatList = view.findViewById(R.id.chatlist_container);
+        chatList.setLayoutManager(new LinearLayoutManager(getContext()));
         presenter = new ChatListPresenter(this);
         presenter.updateChatList();
     }