//! Extra logging types for log files and such
use super::*;
use generational_arena::Index;
use mopa::*;

use std::marker::{Sync, Send};

/// A logging hook
pub trait Hook: Sync + Send + Any
{
    /// The name of this hook object
    fn name(&self) -> &str {"(unnamed)"}
    /// Fired when hook is added
    fn initialise(&mut self, _idx: &Index) {}
    /// Fired when `println` is called
    fn println(&mut self, level: &dyn AsLevel, what: &dyn Display, trace: &Trace) -> io::Result<()>;
    /// Fired when hook is removed
    fn finalise(&mut self, _idx: Index) {}
}
mopafy!(Hook);

impl std::fmt::Debug for dyn Hook
{
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result
    {
	write!(f, "<opaque type>")
    }
}