80 lines
1.8 KiB
Go
80 lines
1.8 KiB
Go
// Package goemitter
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package goemitter
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import (
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"sync"
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)
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type EventEmitter struct {
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callbacks map[string][]func(args ...interface{})
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onceCallbacks map[string][]func(args ...interface{})
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lock sync.Mutex
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}
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func (e *EventEmitter) On(event string, callback func(args ...interface{})) {
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e.lock.Lock()
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defer e.lock.Unlock()
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if _, ok := e.callbacks[event]; !ok {
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e.callbacks[event] = []func(args ...interface{}){callback}
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} else {
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e.callbacks[event] = append(e.callbacks[event], callback)
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}
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}
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func (e *EventEmitter) Once(event string, callback func(args ...interface{})) {
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e.lock.Lock()
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defer e.lock.Unlock()
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if _, ok := e.onceCallbacks[event]; !ok {
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e.onceCallbacks[event] = []func(args ...interface{}){callback}
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} else {
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e.onceCallbacks[event] = append(e.onceCallbacks[event], callback)
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}
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}
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func (e *EventEmitter) Emit(event string, data ...interface{}) {
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e.lock.Lock()
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defer e.lock.Unlock()
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if callbacks, ok := e.callbacks[event]; ok {
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for _, callback := range callbacks {
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go callback(data...)
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}
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}
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if onceCallbacks, ok := e.onceCallbacks[event]; ok {
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for _, callback := range onceCallbacks {
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go callback(data...)
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}
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e.onceCallbacks[event] = []func(args ...interface{}){}
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}
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}
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func (e *EventEmitter) EmitSync(event string, data ...interface{}) {
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e.lock.Lock()
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defer e.lock.Unlock()
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if callbacks, ok := e.callbacks[event]; ok {
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for _, callback := range callbacks {
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callback(data...)
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}
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}
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if onceCallbacks, ok := e.onceCallbacks[event]; ok {
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for _, callback := range onceCallbacks {
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callback(data...)
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}
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e.onceCallbacks[event] = []func(args ...interface{}){}
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}
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}
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func NewEmitter() *EventEmitter {
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ret := &EventEmitter{}
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ret.callbacks = make(map[string][]func(args ...interface{}))
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ret.onceCallbacks = make(map[string][]func(args ...interface{}))
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return ret
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}
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