fix code style.

app/src/main/java/chat/rocket/android/activity/MainActivity.java

@@ -75,7 +75,8 @@ public class MainActivity extends AbstractAuthedActivity {
         .subscribe(RxView.visibility(findViewById(R.id.user_action_container)));
   }
 
-  private RealmListObserver<RoomSubscription> roomsObserver = new RealmListObserver<RoomSubscription>() {
+  private RealmListObserver<RoomSubscription> roomsObserver =
+      new RealmListObserver<RoomSubscription>() {
         @Override protected RealmResults<RoomSubscription> queryItems(Realm realm) {
           return realm.where(RoomSubscription.class).findAll();
         }

app/src/main/java/chat/rocket/android/fragment/chatroom/RoomFragment.java

@@ -44,7 +44,8 @@ public class RoomFragment extends AbstractChatRoomFragment {
 
   }
 
-  private RealmObjectObserver<RoomSubscription> roomObserver = new RealmObjectObserver<RoomSubscription>() {
+  private RealmObjectObserver<RoomSubscription> roomObserver =
+      new RealmObjectObserver<RoomSubscription>() {
         @Override protected RealmQuery<RoomSubscription> query(Realm realm) {
           return realm.where(RoomSubscription.class).equalTo("rid", roomId);
         }

app/src/main/java/chat/rocket/android/helper/MethodCallHelper.java

@@ -154,41 +154,31 @@ public class MethodCallHelper {
   }
 
   private Task<Long> getRoomSubscriptionRecursive(long timestamp) {
-    return call("subscriptions/get", param -> param.put("$date", timestamp), task -> {
-      JSONObject result = task.getResult();
-
-      long nextTimestamp = 0;
-      try {
-        nextTimestamp = result.getJSONArray("remove")
-            .getJSONObject(0).getJSONObject("_deletedAt").getLong("$date");
-      } catch (JSONException exception) {
-      }
-
-      try {
-        JSONArray updatedRooms = result.getJSONArray("update");
+    return getObjectRecursive("subscriptions", updatedRooms -> {
       for (int i = 0; i < updatedRooms.length(); i++) {
         updatedRooms.getJSONObject(i).put("serverConfigId", serverConfigId);
       }
+    }, timestamp);
+  }
 
-        Task<Void> saveToDB =  RealmHelperBolts.executeTransaction(realm -> {
-          realm.createOrUpdateAllFromJson(RoomSubscription.class, result.getJSONArray("update"));
-          return null;
-        });
-
-        if (nextTimestamp > 0 && (timestamp == 0 || nextTimestamp < timestamp)) {
-          final long _next = nextTimestamp;
-          return saveToDB.onSuccessTask(_task -> getRoomSubscriptionRecursive(_next));
-        } else {
-          return saveToDB.onSuccessTask(_task -> Task.forResult(0L));
+  private Task<Long> getRoomRecursive(long timestamp) {
+    return getObjectRecursive("rooms", updatedRooms -> {
+      for (int i = 0; i < updatedRooms.length(); i++) {
+        JSONObject roomJson = updatedRooms.getJSONObject(i);
+        String rid = roomJson.getString("_id");
+        roomJson.put("rid", rid)
+            .put("serverConfigId", serverConfigId)
+            .remove("_id");
       }
-      } catch (JSONException exception) {
-        return Task.forError(exception);
+    }, timestamp);
   }
-    });
+
+  private interface Customizer {
+    void customizeResult(JSONArray updatedRooms) throws JSONException;
   }
 
-  private Task<Long> getRoomRecursive(long timestamp) {
-    return call("rooms/get", param -> param.put("$date", timestamp), task -> {
+  private Task<Long> getObjectRecursive(String objName, Customizer customizer, long timestamp) {
+    return call(objName + "/get", param -> param.put("$date", timestamp), task -> {
       JSONObject result = task.getResult();
 
       long nextTimestamp = 0;
@@ -196,17 +186,12 @@ public class MethodCallHelper {
         nextTimestamp = result.getJSONArray("remove")
             .getJSONObject(0).getJSONObject("_deletedAt").getLong("$date");
       } catch (JSONException exception) {
+        // keep nextTimestamp = 0
       }
 
       try {
         JSONArray updatedRooms = result.getJSONArray("update");
-        for (int i = 0; i < updatedRooms.length(); i++) {
-          JSONObject roomJson = updatedRooms.getJSONObject(i);
-          String rid = roomJson.getString("_id");
-          roomJson.put("rid", rid)
-              .put("serverConfigId", serverConfigId)
-              .remove("_id");
-        }
+        customizer.customizeResult(updatedRooms);
 
         Task<Void> saveToDB =  RealmHelperBolts.executeTransaction(realm -> {
           realm.createOrUpdateAllFromJson(RoomSubscription.class, result.getJSONArray("update"));
@@ -215,7 +200,7 @@ public class MethodCallHelper {
 
         if (nextTimestamp > 0 && (timestamp == 0 || nextTimestamp < timestamp)) {
           final long _next = nextTimestamp;
-          return saveToDB.onSuccessTask(_task -> getRoomRecursive(_next));
+          return saveToDB.onSuccessTask(_task -> getObjectRecursive(objName, customizer, _next));
         } else {
           return saveToDB.onSuccessTask(_task -> Task.forResult(0L));
         }

app/src/main/java/chat/rocket/android/layouthelper/chatroom/RoomListManager.java

@@ -43,7 +43,8 @@ public class RoomListManager {
 
       String type = roomSubscription.getT();
 
-      if (RoomSubscription.TYPE_CHANNEL.equals(type) || RoomSubscription.TYPE_PRIVATE.equals(type)) {
+      if (RoomSubscription.TYPE_CHANNEL.equals(type)
+          || RoomSubscription.TYPE_PRIVATE.equals(type)) {
         insertOrUpdateItem(channelsContainer, roomSubscription);
         removeItemIfExists(dmContainer, name);
       } else if (RoomSubscription.TYPE_DIRECT_MESSAGE.equals(type)) {
@@ -85,7 +86,8 @@ public class RoomListManager {
     }
   }
 
-  private void updateRoomItemView(RoomListItemView roomListItemView, RoomSubscription roomSubscription) {
+  private void updateRoomItemView(RoomListItemView roomListItemView,
+      RoomSubscription roomSubscription) {
     roomListItemView
         .setRoomId(roomSubscription.getRid())
         .setRoomName(roomSubscription.getName())

app/src/main/java/chat/rocket/android/model/Email.java

@@ -4,6 +4,7 @@ import io.realm.RealmObject;
 import io.realm.annotations.PrimaryKey;
 
 /**
+ * Login-User's email
  */
 public class Email extends RealmObject {
   @PrimaryKey private String address;