42 lines
768 B
Go
42 lines
768 B
Go
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package naive
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import "fmt"
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type Effect[T any] struct {
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value T
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listeners []func(newValue T)
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}
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var effects []interface{ clearListeners() }
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func clearAllEffectListeners() {
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for _, eff := range effects {
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eff.clearListeners()
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}
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}
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func UseEffect[T any](value T) *Effect[T] {
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eff := &Effect[T]{value, nil}
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effects = append(effects, eff)
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return eff
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}
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func (eff *Effect[T]) Value() string {
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return fmt.Sprintf("%v", eff.value)
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}
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func (eff *Effect[T]) SetValue(newValue T) {
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eff.value = newValue
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for _, listener := range eff.listeners {
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listener(newValue)
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}
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}
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func (eff *Effect[T]) OnChange(listener func(newValue T)) {
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eff.listeners = append(eff.listeners, listener)
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}
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func (eff *Effect[T]) clearListeners() {
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eff.listeners = eff.listeners[:0]
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}
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