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use anyhow::{Context, Result};
use ratatui::{
backend::CrosstermBackend,
crossterm::{
event::{self, DisableMouseCapture, EnableMouseCapture, Event, KeyCode, KeyEventKind},
terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
QueueableCommand,
},
Terminal,
};
use std::io::{self, StdoutLock, Write};
use crate::app_state::AppState;
use self::state::{Filter, UiState};
mod state;
fn handle_list(app_state: &mut AppState, stdout: &mut StdoutLock) -> Result<()> {
let mut terminal = Terminal::new(CrosstermBackend::new(stdout))?;
terminal.clear()?;
let mut ui_state = UiState::new(app_state);
'outer: loop {
terminal.try_draw(|frame| ui_state.draw(frame).map_err(io::Error::other))?;
let key = loop {
match event::read().context("Failed to read terminal event")? {
Event::Key(key) => match key.kind {
KeyEventKind::Press | KeyEventKind::Repeat => break key,
KeyEventKind::Release => (),
},
// Redraw
Event::Resize(_, _) => continue 'outer,
// Ignore
Event::FocusGained | Event::FocusLost | Event::Mouse(_) | Event::Paste(_) => (),
}
};
ui_state.message.clear();
match key.code {
KeyCode::Char('q') => break,
KeyCode::Down | KeyCode::Char('j') => ui_state.select_next(),
KeyCode::Up | KeyCode::Char('k') => ui_state.select_previous(),
KeyCode::Home | KeyCode::Char('g') => ui_state.select_first(),
KeyCode::End | KeyCode::Char('G') => ui_state.select_last(),
KeyCode::Char('d') => {
let message = if ui_state.filter == Filter::Done {
ui_state.filter = Filter::None;
"Disabled filter DONE"
} else {
ui_state.filter = Filter::Done;
"Enabled filter DONE │ Press d again to disable the filter"
};
ui_state = ui_state.with_updated_rows();
ui_state.message.push_str(message);
}
KeyCode::Char('p') => {
let message = if ui_state.filter == Filter::Pending {
ui_state.filter = Filter::None;
"Disabled filter PENDING"
} else {
ui_state.filter = Filter::Pending;
"Enabled filter PENDING │ Press p again to disable the filter"
};
ui_state = ui_state.with_updated_rows();
ui_state.message.push_str(message);
}
KeyCode::Char('r') => {
ui_state = ui_state.with_reset_selected()?;
}
KeyCode::Char('c') => {
ui_state.selected_to_current_exercise()?;
break;
}
_ => (),
}
}
Ok(())
}
pub fn list(app_state: &mut AppState) -> Result<()> {
let mut stdout = io::stdout().lock();
stdout
.queue(EnterAlternateScreen)?
.queue(EnableMouseCapture)?
.flush()?;
enable_raw_mode()?;
let res = handle_list(app_state, &mut stdout);
// Restore the terminal even if we got an error.
stdout
.queue(LeaveAlternateScreen)?
.queue(DisableMouseCapture)?
.flush()?;
disable_raw_mode()?;
res
}
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