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|
use anyhow::Result;
use crossterm::{
style::{Attribute, ContentStyle, Stylize},
terminal::{Clear, ClearType},
ExecutableCommand,
};
use notify_debouncer_mini::{DebounceEventResult, DebouncedEventKind};
use std::{
fmt::Write as _,
io::{self, StdoutLock, Write as _},
sync::mpsc::Receiver,
time::Duration,
};
use crate::{
exercise::{Exercise, State},
state_file::StateFile,
};
pub struct WatchState<'a> {
writer: StdoutLock<'a>,
rx: Receiver<DebounceEventResult>,
exercises: &'a [Exercise],
exercise: &'a Exercise,
current_exercise_ind: usize,
stdout: Option<Vec<u8>>,
stderr: Option<Vec<u8>>,
message: Option<String>,
prompt: Vec<u8>,
}
impl<'a> WatchState<'a> {
pub fn new(
state_file: &StateFile,
exercises: &'a [Exercise],
rx: Receiver<DebounceEventResult>,
) -> Self {
let current_exercise_ind = state_file.next_exercise_ind();
let exercise = &exercises[current_exercise_ind];
let writer = io::stdout().lock();
let prompt = format!(
"\n\n{}int/{}lear/{}uit? ",
"h".bold(),
"c".bold(),
"q".bold()
)
.into_bytes();
Self {
writer,
rx,
exercises,
exercise,
current_exercise_ind,
stdout: None,
stderr: None,
message: None,
prompt,
}
}
#[inline]
pub fn into_writer(self) -> StdoutLock<'a> {
self.writer
}
pub fn run_exercise(&mut self) -> Result<bool> {
let output = self.exercise.run()?;
if !output.status.success() {
self.stdout = Some(output.stdout);
self.stderr = Some(output.stderr);
return Ok(false);
}
if let State::Pending(context) = self.exercise.state()? {
let mut message = format!(
"
You can keep working on this exercise or jump into the next one by removing the {} comment:
",
"`I AM NOT DONE`".bold(),
);
for context_line in context {
let formatted_line = if context_line.important {
context_line.line.bold()
} else {
context_line.line.stylize()
};
writeln!(
message,
"{:>2} {} {}",
ContentStyle {
foreground_color: Some(crossterm::style::Color::Blue),
background_color: None,
underline_color: None,
attributes: Attribute::Bold.into()
}
.apply(context_line.number),
"|".blue(),
formatted_line,
)?;
}
self.stdout = Some(output.stdout);
self.message = Some(message);
return Ok(false);
}
Ok(true)
}
pub fn try_recv_event(&mut self) -> Result<()> {
let Ok(events) = self.rx.recv_timeout(Duration::from_millis(100)) else {
return Ok(());
};
if let Some(current_exercise_ind) = events?
.iter()
.filter_map(|event| {
if event.kind != DebouncedEventKind::Any
|| !event.path.extension().is_some_and(|ext| ext == "rs")
{
return None;
}
self.exercises
.iter()
.position(|exercise| event.path.ends_with(&exercise.path))
})
.min()
{
self.current_exercise_ind = current_exercise_ind;
} else {
return Ok(());
};
while self.current_exercise_ind < self.exercises.len() {
self.exercise = &self.exercises[self.current_exercise_ind];
if !self.run_exercise()? {
break;
}
self.current_exercise_ind += 1;
}
Ok(())
}
pub fn show_prompt(&mut self) -> io::Result<()> {
self.writer.write_all(&self.prompt)?;
self.writer.flush()
}
pub fn render(&mut self) -> io::Result<()> {
self.writer.execute(Clear(ClearType::All))?;
if let Some(stdout) = &self.stdout {
self.writer.write_all(stdout)?;
}
if let Some(stderr) = &self.stderr {
self.writer.write_all(stderr)?;
}
if let Some(message) = &self.message {
self.writer.write_all(message.as_bytes())?;
}
self.show_prompt()
}
pub fn show_hint(&mut self) -> io::Result<()> {
self.writer.write_all(self.exercise.hint.as_bytes())?;
self.show_prompt()
}
pub fn handle_invalid_cmd(&mut self) -> io::Result<()> {
self.writer.write_all(b"Invalid command")?;
self.show_prompt()
}
}
|
