Display seen status of messages

src/ui/chat/tree/widgets/seen.rs

@@ -0,0 +1,24 @@
+use crossterm::style::{ContentStyle, Stylize};
+
+use crate::ui::widgets::background::Background;
+use crate::ui::widgets::empty::Empty;
+use crate::ui::widgets::text::Text;
+use crate::ui::widgets::BoxedWidget;
+
+const UNSEEN: &str = "*";
+const WIDTH: u16 = 1;
+
+fn seen_style() -> ContentStyle {
+    ContentStyle::default().black().on_green()
+}
+
+pub fn widget(seen: bool) -> BoxedWidget {
+    if seen {
+        Empty::new().width(WIDTH).into()
+    } else {
+        let style = seen_style();
+        Background::new(Text::new((UNSEEN, style)))
+            .style(style)
+            .into()
+    }
+}