feat: add help menu

src/main.rs

@@ -6,18 +6,12 @@ use std::{
 };
 
 use crossterm::{
-  ExecutableCommand,
-  event::{self, Event, KeyCode, KeyModifiers},
-  terminal::{EnterAlternateScreen, LeaveAlternateScreen, disable_raw_mode, enable_raw_mode},
+  ExecutableCommand, event::{self, Event, KeyCode, KeyModifiers}, terminal::{EnterAlternateScreen, LeaveAlternateScreen, disable_raw_mode, enable_raw_mode},
 };
 
 use figlet_rs::Toilet;
 use ratatui::{
-  Terminal,
-  backend::CrosstermBackend,
-  layout::{Alignment, Constraint, Direction, Layout},
-  style::{Color, Style},
-  widgets::Paragraph,
+  Terminal, backend::CrosstermBackend, layout::{Alignment, Constraint, Direction, Layout}, style::{Color, Style}, widgets::{Block, Borders, Clear, Paragraph},
 };
 
 const SECONDS_PER_MIN: i64 = 60;
@@ -37,6 +31,7 @@ struct Termato {
   is_running: bool,
   duration_in_secs: i64,
   time_remaining_in_sec: i64,
+  show_help: bool,
 }
 
 impl Termato {
@@ -49,6 +44,7 @@ impl Termato {
       is_running: false,
       duration_in_secs: work_mins * SECONDS_PER_MIN,
       time_remaining_in_sec: break_mins * SECONDS_PER_MIN,
+      show_help: false,
     }
   }
 
@@ -97,8 +93,14 @@ impl Termato {
     self.duration_in_secs = self.work_mins * SECONDS_PER_MIN;
     self.time_remaining_in_sec = self.duration_in_secs;
   }
+
+  fn toggle_help(&mut self) {
+    self.show_help = !self.show_help;
+  }
 }
 
+// TODO: I think we can refactor this to be more like iced.rs
+// basically implement an elem like approach.
 fn main() -> Result<(), io::Error> {
   enable_raw_mode()?;
   stdout().execute(EnterAlternateScreen)?;
@@ -122,11 +124,11 @@ fn main() -> Result<(), io::Error> {
   loop {
     terminal.draw(|f| {
       let size = f.area();
-      
+
       let minutes = termato.time_remaining_in_sec / SECONDS_PER_MIN;
       let seconds = termato.time_remaining_in_sec % SECONDS_PER_MIN;
       let time_str = format!("{:02}:{:02}", minutes, seconds);
-      
+
       let time_color = match termato.state {
         TimerState::Work => Color::Red,
         TimerState::Break => Color::Green,
@@ -155,6 +157,52 @@ fn main() -> Result<(), io::Error> {
         .alignment(Alignment::Center);
 
       f.render_widget(timer_paragraph, vertical_layout[1]);
+
+      if termato.show_help {
+        let popup_width = 44;
+        let popup_height = 7;
+
+        if size.width >= popup_width && size.height >= popup_height {
+          let popup_vertical = Layout::default()
+            .direction(Direction::Vertical)
+            .constraints([
+              Constraint::Length((size.height.saturating_sub(popup_height)) / 2),
+              Constraint::Length(popup_height),
+              Constraint::Min(1),
+            ])
+            .split(size);
+
+          let popup_horizontal = Layout::default()
+            .direction(Direction::Horizontal)
+            .constraints([
+              Constraint::Length((size.width.saturating_sub(popup_width)) / 2),
+              Constraint::Length(popup_width),
+              Constraint::Min(1),
+            ])
+            .split(popup_vertical[1]);
+
+          let popup_area = popup_horizontal[1];
+
+          let help_block = Block::default()
+            .title(" Controls ")
+            .borders(Borders::ALL)
+            .border_style(Style::default().fg(Color::DarkGray));
+
+          let help_content = Paragraph::new(
+            "[Space] Pause / Resume\n\
+             [S]     Switch Mode\n\
+             [R]     Reset Timer\n\
+             [?]     Toggle Help\n\
+             [Q]     Quit",
+          )
+          .block(help_block)
+          .style(Style::default().fg(Color::DarkGray))
+          .alignment(Alignment::Left);
+
+          f.render_widget(Clear, popup_area);
+          f.render_widget(help_content, popup_area);
+        }
+      }
     })?;
 
     if event::poll(Duration::from_millis(100))?
@@ -167,6 +215,7 @@ fn main() -> Result<(), io::Error> {
         KeyCode::Char(' ') => termato.toggle_running(),
         KeyCode::Char('s') | KeyCode::Char('S') => termato.toggle_mode(),
         KeyCode::Char('r') | KeyCode::Char('R') => termato.reset(),
+        KeyCode::Char('?') => termato.toggle_help(),
         _ => {}
       }
     }
@@ -311,4 +360,17 @@ mod tests {
     assert_eq!(termato.duration_in_secs, 60);
     assert_eq!(termato.time_remaining_in_sec, 60);
   }
+
+  #[test]
+  fn termato_toggle_help_when_called_it_should_toggle_help() {
+    let mut termato = Termato::new(1, 1);
+
+    termato.toggle_help();
+
+    assert!(termato.show_help);
+
+    termato.toggle_help();
+
+    assert!(!termato.show_help);
+  }
 }