src/game.rs


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use std::cell::RefCell;
use std::rc::Rc;

use crate::canvas::Canvas;
use crate::state::State;

pub struct Game {
    canvas: Canvas,
    state: Rc<RefCell<State>>,
}

impl Game {
    pub fn new(canvas_id: &str, width: u32, height: u32) -> Game {
        let canvas = Canvas::new(canvas_id, width, height);
        let state = Rc::new(RefCell::new(State::new(width, height)));

        Game {
            canvas,
            state,
        }
    }

    pub fn update(&self) {
        let next_state = self.state.borrow().next();
        *self.state.borrow_mut() = next_state;
    }

    pub fn render(&self) {
        self.state.borrow().draw(&self.canvas);
    }
}