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use std::collections::HashMap;
pub type EventData<T> = HashMap<String, T>;
pub type EventCallback<'callback, T> = FnMut(& mut EventData<T>) -> () + 'callback;
pub trait Events<'callback, T> {
fn on(&mut self, event_name: String, callback: &'callback mut EventCallback<'callback, T>);
fn off(&mut self, event_name: String);
fn emit(&mut self, event_name: String, EventData: & mut EventData<T>);
}
pub struct Emitter<'callback, T: 'callback> {
events : HashMap<String, Vec<&'callback mut EventCallback<'callback, T>>>
}
impl<'callback, T> Emitter<'callback, T>{
pub fn new() -> Emitter<'callback, T> {
Emitter {
events: HashMap::new()
}
}
}
impl<'callback, T> Events<'callback, T> for Emitter<'callback, T> {
fn on(&mut self, event_name: String, callback: &'callback mut EventCallback<'callback, T>) {
if self.events.contains_key(&event_name) {
match self.events.get_mut(&event_name) {
Some(callbacks) => callbacks.push(callback),
None => (),
}
} else {
let vec = vec![callback];
self.events.insert(event_name, vec);
}
}
fn off(&mut self, event_name: String) {
self.events.remove(&event_name);
}
fn emit(&mut self, event_name: String, event_data: & mut EventData<T>) {
match self.events.get_mut(&event_name) {
Some(callbacks) => {
for callback in callbacks.iter_mut() {
(*callback)(event_data);
}
}
_ => {;}
}
}
}