Started with list

src/list.rs

@@ -0,0 +1,93 @@
+use std::{io, time::Duration};
+
+use anyhow::Result;
+use crossterm::{
+    event::{self, KeyCode, KeyEventKind},
+    terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
+    ExecutableCommand,
+};
+use ratatui::{
+    backend::CrosstermBackend,
+    layout::Constraint,
+    style::{Modifier, Style, Stylize},
+    text::Span,
+    widgets::{Block, Borders, HighlightSpacing, Row, Table, TableState},
+    Terminal,
+};
+
+use crate::{exercise::Exercise, state::State};
+
+// 40 FPS.
+const UPDATE_INTERVAL: Duration = Duration::from_millis(25);
+
+pub fn list(state: &State, exercises: &[Exercise]) -> Result<()> {
+    let mut stdout = io::stdout().lock();
+
+    stdout.execute(EnterAlternateScreen)?;
+    enable_raw_mode()?;
+
+    let mut terminal = Terminal::new(CrosstermBackend::new(&mut stdout))?;
+    terminal.clear()?;
+
+    let header = Row::new(["State", "Name", "Path"]);
+
+    let max_name_len = exercises
+        .iter()
+        .map(|exercise| exercise.name.len())
+        .max()
+        .unwrap_or(4) as u16;
+
+    let widths = [
+        Constraint::Length(7),
+        Constraint::Length(max_name_len),
+        Constraint::Fill(1),
+    ];
+
+    let rows = exercises
+        .iter()
+        .zip(&state.progress)
+        .map(|(exercise, done)| {
+            let state = if *done {
+                "DONE".green()
+            } else {
+                "PENDING".yellow()
+            };
+            Row::new([
+                state,
+                Span::raw(&exercise.name),
+                Span::raw(exercise.path.to_string_lossy()),
+            ])
+        })
+        .collect::<Vec<_>>();
+
+    let table = Table::new(rows, widths)
+        .header(header)
+        .column_spacing(2)
+        .highlight_spacing(HighlightSpacing::Always)
+        .highlight_style(Style::new().add_modifier(Modifier::REVERSED))
+        .highlight_symbol("🦀");
+
+    let mut table_state = TableState::default().with_selected(Some(0));
+
+    loop {
+        terminal.draw(|frame| {
+            let area = frame.size();
+
+            frame.render_stateful_widget(&table, area, &mut table_state);
+        })?;
+
+        if event::poll(UPDATE_INTERVAL)? {
+            if let event::Event::Key(key) = event::read()? {
+                if key.kind == KeyEventKind::Press && key.code == KeyCode::Char('q') {
+                    break;
+                }
+            }
+        }
+    }
+
+    drop(terminal);
+    stdout.execute(LeaveAlternateScreen)?;
+    disable_raw_mode()?;
+
+    Ok(())
+}