/// A app-unique version number for content.
/// This is used for tracking and comparing versions of content across the application.
/// The Rich Text Buffer and the LocalFileModel use this for comparing versions of content.
use std::sync::atomic::{AtomicUsize, Ordering};

#[derive(Clone, PartialEq, Debug, Copy, Eq, PartialOrd, Ord, Hash)]
pub struct ContentVersion(usize);

impl ContentVersion {
    /// Constructs a new app-unique content version.
    #[allow(clippy::new_without_default)]
    pub fn new() -> Self {
        static NEXT_ID: AtomicUsize = AtomicUsize::new(0);
        let raw = NEXT_ID.fetch_add(1, Ordering::Relaxed);
        ContentVersion(raw)
    }

    pub fn as_i32(&self) -> i32 {
        self.0 as i32
    }
}

#[cfg(test)]
#[path = "content_version_test.rs"]
mod tests;