const SPINNER_FRAMES: &[char] = &['◐', '◓', '◑', '◒'];

pub struct Spinner {
    frame: usize,
}

impl Spinner {
    pub fn new() -> Self {
        Self { frame: 0 }
    }

    pub fn tick(&mut self) {
        self.frame = (self.frame + 1) % SPINNER_FRAMES.len();
    }

    pub fn current(&self) -> char {
        SPINNER_FRAMES[self.frame]
    }
}

impl Default for Spinner {
    fn default() -> Self {
        Self::new()
    }
}