/
events.go
43 lines (36 loc) · 1.02 KB
/
events.go
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package loudp2p
// EventType is an event identifier for the enum-like thing.
type EventType int
const (
_ = iota
SayHello EventType = 1
HelloPeerAddr = 2
HelloRPCPort = 3
)
// EventHandler is the event handler base data structure.
type EventHandler struct {
Listeners []*chan (*Event)
}
// Event is a data structure for events.
type Event struct {
Type EventType
Metadata interface{}
}
// NewEventHandler returns a brand new EventHandler{}.
func NewEventHandler() (eventHandler EventHandler) {
return eventHandler
}
// AddListener initializes a listener channel and returns a pointer to it.
func (e *EventHandler) AddListener() *chan (*Event) {
var eventChan = make(chan *Event)
e.Listeners = append(e.Listeners, &eventChan)
return &eventChan
}
// Emit broadcasts the emitted event to available listeners.
func (e *EventHandler) Emit(event Event) {
for _, listener := range e.Listeners {
go func(event *Event, l *chan (*Event)) {
*l <- event
}(&event, listener)
}
}