just refactor

app/src/main/java/chat/rocket/android/service/observer/PushSettingsObserver.java

@@ -9,6 +9,7 @@ import java.util.List;
 import chat.rocket.android.api.DDPClientWrapper;
 import chat.rocket.android.helper.LogcatIfError;
 import chat.rocket.android.helper.ServerPolicyHelper;
+import chat.rocket.android.helper.TextUtils;
 import chat.rocket.android.model.ServerConfig;
 import chat.rocket.android.model.ddp.PublicSetting;
 import chat.rocket.android.model.ddp.PublicSettingsConstants;
@@ -25,16 +26,16 @@ public class PushSettingsObserver extends AbstractModelObserver<PublicSetting> {
 
   @Override
   public void onUpdateResults(List<PublicSetting> results) {
-    RealmHelper realmHelper = RealmStore.getDefault();
-
-    final ServerConfig serverConfig = realmHelper.executeTransactionForRead(realm ->
+    final ServerConfig serverConfig = RealmStore.getDefault().executeTransactionForRead(realm ->
         realm.where(ServerConfig.class)
             .equalTo(ServerConfig.HOSTNAME, ServerPolicyHelper.enforceHostname(hostname))
             .findFirst());
 
-    serverConfig.setSyncPushToken(isPushEnabled(results));
+    boolean syncPushToken = shouldEnablePush(results);
+    if (serverConfig.shouldSyncPushToken() != syncPushToken) {
+      serverConfig.setSyncPushToken(syncPushToken);
 
-    realmHelper
+      RealmStore.getDefault()
           .executeTransaction(realm -> realm.copyToRealmOrUpdate(serverConfig))
           .continueWith(task -> {
             if (serverConfig.shouldSyncPushToken()) {
@@ -47,6 +48,7 @@ public class PushSettingsObserver extends AbstractModelObserver<PublicSetting> {
           })
           .continueWith(new LogcatIfError());
     }
+  }
 
   @Override
   public RealmResults<PublicSetting> queryItems(Realm realm) {
@@ -57,11 +59,11 @@ public class PushSettingsObserver extends AbstractModelObserver<PublicSetting> {
         .findAll();
   }
 
-  private boolean isPushEnabled(List<PublicSetting> results) {
-    return isPushEnable(results) && isGcmValid(results);
+  private boolean shouldEnablePush(List<PublicSetting> results) {
+    return isPushEnabled(results) && hasValidGcmConfig(results);
   }
 
-  private boolean isPushEnable(List<PublicSetting> results) {
+  private boolean isPushEnabled(List<PublicSetting> results) {
     for (PublicSetting setting : results) {
       if (PublicSettingsConstants.Push.ENABLE.equals(setting.getId())) {
         return "true".equals(setting.getValue());
@@ -70,10 +72,10 @@ public class PushSettingsObserver extends AbstractModelObserver<PublicSetting> {
     return false;
   }
 
-  private boolean isGcmValid(List<PublicSetting> results) {
+  private boolean hasValidGcmConfig(List<PublicSetting> results) {
     for (PublicSetting setting : results) {
       if (PublicSettingsConstants.Push.GCM_PROJECT_NUMBER.equals(setting.getId())) {
-        return setting.getValue() != null && !"".equals(setting.getValue());
+        return !TextUtils.isEmpty(setting.getValue());
       }
     }
     return false;