Mirror of github.com/gissleh/irc
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package irc
import (
"sync"
)
// A Handler is a function that is part of the irc event loop. It will receive all
// events that haven't been killed up to that point.
type Handler func(event *Event, client *Client)
var eventHandler struct {
mutex sync.RWMutex
handlers []Handler
}
func emit(event *Event, client *Client) {
eventHandler.mutex.RLock()
for _, handler := range eventHandler.handlers {
handler(event, client)
}
eventHandler.mutex.RUnlock()
}
// Handle adds a new handler to the irc handling. It returns a pointer that can be passed to RemoveHandler
// later on to unsubscribe.
func Handle(handler Handler) *Handler {
eventHandler.mutex.Lock()
defer eventHandler.mutex.Unlock()
eventHandler.handlers = append(eventHandler.handlers, handler)
return &eventHandler.handlers[len(eventHandler.handlers)-1]
}
// RemoveHandler unregisters a handler.
func RemoveHandler(handlerPtr *Handler) (ok bool) {
eventHandler.mutex.Lock()
defer eventHandler.mutex.Unlock()
for i := range eventHandler.handlers {
if &eventHandler.handlers[i] == handlerPtr {
eventHandler.handlers = append(eventHandler.handlers[:i], eventHandler.handlers[i+1:]...)
return true
}
}
return false
}
func init() {
eventHandler.handlers = make([]Handler, 0, 8)
}