fix #2

src/app/error_msg.rs

@@ -0,0 +1,39 @@
+use std::time::Instant;
+
+use ratatui::{layout::Rect, prelude, style::{Color, Style}, widgets::{Paragraph, Widget}};
+
+pub struct ErrorMessage {
+    start: Instant,
+    error_msg: Option<String>,
+}
+
+impl ErrorMessage {
+    pub fn new(msg: impl Into<String>) -> Self {
+        Self {
+            error_msg: Some(msg.into()),
+            start: Instant::now(),
+        }
+    }
+
+    pub fn none() -> Self {
+        Self {
+            start: Instant::now(),
+            error_msg: None,
+        }
+    }
+}
+
+impl Widget for &ErrorMessage {
+    fn render(self, area: Rect, buf: &mut prelude::Buffer) {
+        // The screen doesn't refresh at a fixed fps like a normal GUI,
+        // so if the user isn't moving around the timeout will *happen* but
+        // won't be visualized until they move
+        let msg = if self.start.elapsed().as_secs() > 3 {
+            String::new()
+        } else {
+            self.error_msg.clone().unwrap_or(String::new())
+        };
+
+        Paragraph::new(msg).style(Style::new().fg(Color::Red)).render(area, buf);
+    }
+}