mod-events 0.9.0

//! Priority system for event listeners

/// Priority levels for event listeners
///
/// Listeners with higher priority are executed first.
/// This allows for controlling the execution order of event handlers.
///
/// # Example
///
/// ```rust
/// use mod_events::{EventDispatcher, Priority, Event};
///
/// #[derive(Debug, Clone)]
/// struct MyEvent {
///     message: String,
/// }
///
/// impl Event for MyEvent {
///     fn as_any(&self) -> &dyn std::any::Any {
///         self
///     }
/// }
///
/// let dispatcher = EventDispatcher::new();
///
/// // This will execute first
/// dispatcher.subscribe_with_priority(|event: &MyEvent| {
///     println!("High priority handler");
///     Ok(())
/// }, Priority::High);
///
/// // This will execute second
/// dispatcher.subscribe_with_priority(|event: &MyEvent| {
///     println!("Normal priority handler");
///     Ok(())
/// }, Priority::Normal);
/// ```
#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Default)]
pub enum Priority {
    /// Lowest priority (0)
    Lowest = 0,
    /// Low priority (25)
    Low = 25,
    /// Normal priority (50) - default
    #[default]
    Normal = 50,
    /// High priority (75)
    High = 75,
    /// Highest priority (100)
    Highest = 100,
    /// Critical priority (125) - use sparingly
    Critical = 125,
}

impl Priority {
    /// Get all priority levels in order
    pub fn all() -> &'static [Priority] {
        &[
            Priority::Critical,
            Priority::Highest,
            Priority::High,
            Priority::Normal,
            Priority::Low,
            Priority::Lowest,
        ]
    }
}