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