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|
use anyhow::Result;
use ratatui::crossterm::{
style::{style, Stylize},
terminal,
};
use std::io::{self, StdoutLock, Write};
use crate::{
app_state::{AppState, ExercisesProgress},
clear_terminal,
exercise::{RunnableExercise, OUTPUT_CAPACITY},
progress_bar::progress_bar,
terminal_link::TerminalFileLink,
};
#[derive(PartialEq, Eq)]
enum DoneStatus {
DoneWithSolution(String),
DoneWithoutSolution,
Pending,
}
pub struct WatchState<'a> {
writer: StdoutLock<'a>,
app_state: &'a mut AppState,
output: Vec<u8>,
show_hint: bool,
done_status: DoneStatus,
manual_run: bool,
}
impl<'a> WatchState<'a> {
pub fn new(app_state: &'a mut AppState, manual_run: bool) -> Self {
let writer = io::stdout().lock();
Self {
writer,
app_state,
output: Vec::with_capacity(OUTPUT_CAPACITY),
show_hint: false,
done_status: DoneStatus::Pending,
manual_run,
}
}
#[inline]
pub fn into_writer(self) -> StdoutLock<'a> {
self.writer
}
pub fn run_current_exercise(&mut self) -> Result<()> {
self.show_hint = false;
writeln!(
self.writer,
"\nChecking the exercise `{}`. Please wait…",
self.app_state.current_exercise().name,
)?;
let success = self
.app_state
.current_exercise()
.run_exercise(Some(&mut self.output), self.app_state.cmd_runner())?;
if success {
self.done_status =
if let Some(solution_path) = self.app_state.current_solution_path()? {
DoneStatus::DoneWithSolution(solution_path)
} else {
DoneStatus::DoneWithoutSolution
};
} else {
self.app_state
.set_pending(self.app_state.current_exercise_ind())?;
self.done_status = DoneStatus::Pending;
}
self.render()
}
pub fn handle_file_change(&mut self, exercise_ind: usize) -> Result<()> {
// Don't skip exercises on file changes to avoid confusion from missing exercises.
// Skipping exercises must be explicit in the interactive list.
// But going back to an earlier exercise on file change is fine.
if self.app_state.current_exercise_ind() < exercise_ind {
return Ok(());
}
self.app_state.set_current_exercise_ind(exercise_ind)?;
self.run_current_exercise()
}
/// Move on to the next exercise if the current one is done.
pub fn next_exercise(&mut self) -> Result<ExercisesProgress> {
if self.done_status == DoneStatus::Pending {
return Ok(ExercisesProgress::CurrentPending);
}
self.app_state.done_current_exercise(&mut self.writer)
}
fn show_prompt(&mut self) -> io::Result<()> {
self.writer.write_all(b"\n")?;
if self.manual_run {
write!(self.writer, "{}:run / ", 'r'.bold())?;
}
if self.done_status != DoneStatus::Pending {
write!(self.writer, "{}:{} / ", 'n'.bold(), "next".underlined())?;
}
if !self.show_hint {
write!(self.writer, "{}:hint / ", 'h'.bold())?;
}
write!(self.writer, "{}:list / {}:quit ? ", 'l'.bold(), 'q'.bold())?;
self.writer.flush()
}
pub fn render(&mut self) -> Result<()> {
// Prevent having the first line shifted if clearing wasn't successful.
self.writer.write_all(b"\n")?;
clear_terminal(&mut self.writer)?;
self.writer.write_all(&self.output)?;
self.writer.write_all(b"\n")?;
if self.show_hint {
writeln!(
self.writer,
"{}\n{}\n",
"Hint".bold().cyan().underlined(),
self.app_state.current_exercise().hint,
)?;
}
if self.done_status != DoneStatus::Pending {
writeln!(self.writer, "{}", "Exercise done ✓".bold().green())?;
if let DoneStatus::DoneWithSolution(solution_path) = &self.done_status {
writeln!(
self.writer,
"{} for comparison: {}",
"Solution".bold(),
style(TerminalFileLink(solution_path)).underlined().cyan(),
)?;
}
writeln!(
self.writer,
"When done experimenting, enter `n` to move on to the next exercise 🦀\n",
)?;
}
let line_width = terminal::size()?.0;
let progress_bar = progress_bar(
self.app_state.n_done(),
self.app_state.exercises().len() as u16,
line_width,
)?;
writeln!(
self.writer,
"{progress_bar}Current exercise: {}",
self.app_state.current_exercise().terminal_link(),
)?;
self.show_prompt()?;
Ok(())
}
pub fn show_hint(&mut self) -> Result<()> {
self.show_hint = true;
self.render()
}
}
|
