1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147

use std::{
    cell::RefCell,
    io::{self, Stdout},
    sync::{mpsc::channel, Arc, Mutex, RwLock},
    thread::spawn,
    time::{Duration, Instant},
};

use crate::{
    components::Tabs, pages::route, Check, Interval, Logger, Result, Servo, TicksCounter, TuiOpt,
    TuiStates,
};
// use clap::Parser;
use clashctl_interactive::Flags;
use crossterm::execute;
use crossterm::terminal::{
    disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen,
};
use log::info;
use tui::backend::CrosstermBackend;
use tui::layout::{Constraint, Layout};
use tui::{Frame, Terminal};

thread_local!(pub(crate) static TICK_COUNTER: RefCell<TicksCounter> = RefCell::new(TicksCounter::new_with_time(Instant::now())));

pub type Backend = CrosstermBackend<Stdout>;

fn setup() -> Result<Terminal<Backend>> {
    let mut stdout = io::stdout();

    execute!(stdout, EnterAlternateScreen)?;
    enable_raw_mode()?;

    let backend = CrosstermBackend::new(stdout);
    let mut terminal = Terminal::new(backend)?;
    terminal.clear()?;

    Ok(terminal)
}

fn wrap_up(mut terminal: Terminal<Backend>) -> Result<()> {
    execute!(terminal.backend_mut(), LeaveAlternateScreen,)?;

    disable_raw_mode()?;

    Ok(())
}

pub fn main_loop(opt: TuiOpt, flag: Flags) -> Result<()> {
    if flag.get_config()?.using_server().is_none() {
        eprintln!("No server configured yet. Use `clashctl server add` first.");
        return Ok(());
    };

    let state = Arc::new(RwLock::new(TuiStates::default()));
    let error = Arc::new(Mutex::new(None));

    let (event_tx, event_rx) = channel();
    let (action_tx, action_rx) = channel();

    Logger::new(event_tx.clone()).apply()?;
    info!("Logger set");
    let opt = Arc::new(opt);
    let flag = Arc::new(flag);

    let mut servo = Servo::run(event_tx, action_rx, opt, flag)?;

    let event_handler_state = state.clone();
    let event_handler_error = error.clone();

    let handle = spawn(move || {
        let mut should_quit;
        while let Ok(event) = event_rx.recv() {
            should_quit = event.is_quit();
            let mut state = event_handler_state.write().unwrap();
            match state.handle(event) {
                Ok(Some(action)) => {
                    if let Err(e) = action_tx.send(action) {
                        event_handler_error.lock().unwrap().replace(e.into());
                        should_quit = true;
                    }
                }
                // No action needed
                Ok(None) => {}
                Err(e) => {
                    event_handler_error.lock().unwrap().replace(e);
                    should_quit = true;
                }
            }
            if should_quit {
                break;
            }
        }
        event_handler_state
            .write()
            .map(|mut x| x.should_quit = true)
            .unwrap();
    });

    let mut terminal = setup()?;

    let mut interval = Interval::every(Duration::from_millis(33));
    while let Ok(state) = state.read() {
        if !handle.is_running() {
            break;
        }

        if !servo.ok("servo") {
            break;
        }

        if state.should_quit {
            break;
        }

        TICK_COUNTER.with(|t| t.borrow_mut().new_tick());
        if let Err(e) = terminal.draw(|f| render(&state, f)) {
            error.lock().unwrap().replace(e.into());
            break;
        }
        drop(state);
        interval.tick();
    }
    drop(servo);
    drop(handle);

    wrap_up(terminal)?;

    if let Some(error) = error.lock().unwrap().take() {
        return Err(error);
    }

    Ok(())
}

fn render(state: &TuiStates, f: &mut Frame<Backend>) {
    let layout = Layout::default()
        .constraints([Constraint::Length(3), Constraint::Min(0)])
        .split(f.size());

    let tabs = Tabs::new(state);
    f.render_widget(tabs, layout[0]);

    let main = layout[1];

    route(state, main, f);
}