Update UserRenderer class

app/src/main/java/chat/rocket/android/renderer/UserRenderer.java

-package chat.rocket.android.renderer;
-
-import android.content.Context;
-import android.widget.ImageView;
-import android.widget.TextView;
-import chat.rocket.android.helper.Avatar;
-import chat.rocket.android.helper.TextUtils;
-import chat.rocket.android.widget.AbsoluteUrl;
-import chat.rocket.android.widget.RocketChatAvatar;
-import chat.rocket.core.models.User;
-
-/**
- * Renderer for RealmUser model.
- */
-public class UserRenderer extends AbstractRenderer<User> {
-
-  public UserRenderer(Context context, User user) {
-    super(context, user);
-  }
-
-  /**
-   * show Avatar image
-   */
-  public UserRenderer avatarInto(RocketChatAvatar rocketChatAvatar, AbsoluteUrl absoluteUrl) {
-    if (!shouldHandle(rocketChatAvatar)) {
-      return this;
-    }
-
-    if (!TextUtils.isEmpty(object.getUsername())) {
-      new Avatar(absoluteUrl, object.getUsername())
-          .into(rocketChatAvatar);
-    }
-    return this;
-  }
-
-  /**
-   * show Username in textView
-   */
-  public UserRenderer usernameInto(TextView textView) {
-    if (!shouldHandle(textView)) {
-      return this;
-    }
-
-    textView.setText(object.getUsername());
-
-    return this;
-  }
-
-  /**
-   * show user's status color into imageView.
-   */
-  public UserRenderer statusColorInto(ImageView imageView) {
-    if (!shouldHandle(imageView)) {
-      return this;
-    }
-
-    String status = object.getStatus();
-    imageView.setImageResource(RocketChatUserStatusProvider.getInstance().getStatusResId(status));
-
-    return this;
-  }
-}

app/src/main/java/chat/rocket/android/renderer/UserRenderer.kt

+package chat.rocket.android.renderer
+
+import android.view.View
+import android.widget.ImageView
+import android.widget.TextView
+import chat.rocket.android.R
+import chat.rocket.android.helper.RocketChatUserAvatar
+import chat.rocket.android.widget.RocketChatAvatar
+import chat.rocket.core.models.User
+
+class UserRenderer(val user: User) {
+
+    /**
+     * Show user's avatar image in RocketChatAvatar widget.
+     */
+    fun showAvatar(rocketChatAvatarWidget: RocketChatAvatar, hostname: String) {
+        val username: String? = user.username
+        if (username != null) {
+            rocketChatAvatarWidget.loadImage(RocketChatUserAvatar(hostname, username).imageUri)
+        }
+        /**
+         * TODO Load default image for nullable username.
+         */
+    }
+
+    /**
+     * Show username in textView.
+     */
+    fun showUsername(textView: TextView) {
+        textView.text = user.username ?: textView.context.getText(R.string.user_not_found)
+    }
+
+    /**
+     * Show user's status color in imageView.
+     */
+    fun showStatusColor(imageView: ImageView) {
+        val userStatus: String? = user.status
+        if (userStatus != null) {
+            imageView.setImageResource(RocketChatUserStatusProvider.getStatusResId(userStatus))
+        } else {
+            imageView.visibility = View.GONE
+        }
+    }
+}
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