Missing files

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

+package chat.rocket.android.model;
+
+public interface JsonConstants {
+  String DATE = "$date";
+}

app/src/main/java/chat/rocket/android/model/params/PushUpdate.java

+package chat.rocket.android.model.params;
+
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+public class PushUpdate {
+
+  private String pushId;
+  private String gcmToken;
+  private String userId;
+
+  public PushUpdate(@NonNull String pushId, @NonNull String gcmToken, @Nullable String userId) {
+    this.pushId = pushId;
+    this.gcmToken = gcmToken;
+    this.userId = userId;
+  }
+
+  public JSONObject toJson() throws JSONException {
+    JSONObject param = new JSONObject();
+    param.put("id", pushId);
+    param.put("appName", "main");
+    param.put("userId", userId);
+    param.put("metadata", new JSONObject());
+
+    JSONObject tokenParam = new JSONObject();
+    tokenParam.put("gcm", gcmToken);
+
+    param.put("token", tokenParam);
+
+    return param;
+  }
+}