50 lines
840 B
Go
50 lines
840 B
Go
package gobot
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type callback struct {
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f func(interface{})
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once bool
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}
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type Event struct {
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Chan chan interface{}
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Callbacks []callback
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}
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// NewEvent generates a new event by making a channel
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// and start reading from it
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func NewEvent() *Event {
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e := &Event{
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Chan: make(chan interface{}, 1),
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Callbacks: []callback{},
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}
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go func() {
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for {
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e.Read()
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}
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}()
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return e
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}
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// Writes sends event data to channel
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func (e *Event) Write(data interface{}) {
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select {
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case e.Chan <- data:
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default:
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}
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}
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// Read waits data from channel and execute callbacks
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// for each event when received
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func (e *Event) Read() {
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for s := range e.Chan {
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tmp := []callback{}
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for i := range e.Callbacks {
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go e.Callbacks[i].f(s)
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if !e.Callbacks[i].once {
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tmp = append(tmp, e.Callbacks[i])
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}
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}
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e.Callbacks = tmp
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}
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}
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