mirror of
https://github.com/crazybber/go-pattern-examples.git
synced 2024-11-22 20:06:02 +03:00
49 lines
1.2 KiB
Go
49 lines
1.2 KiB
Go
// Package state is an example of the State Pattern.
|
||
package state
|
||
|
||
////////////////////////////////
|
||
//闹装有两种状态,震铃状态,非震铃状态
|
||
|
||
// AlertStater provides a common interface for various states.
|
||
type AlertStater interface {
|
||
Alert() string
|
||
}
|
||
|
||
// Alert implements an alert depending on its state.
|
||
type Alert struct {
|
||
state AlertStater
|
||
}
|
||
|
||
// Alert returns a alert string 代表振铃
|
||
func (a *Alert) Alert() string {
|
||
return a.state.Alert()
|
||
}
|
||
|
||
// SetState changes state
|
||
func (a *Alert) SetState(state AlertStater) {
|
||
a.state = state
|
||
}
|
||
|
||
// NewAlert is the Alert constructor,默认振铃是震动
|
||
func NewAlert() *Alert {
|
||
return &Alert{state: &AlertVibration{}}
|
||
}
|
||
|
||
// AlertVibration implements vibration alert
|
||
type AlertVibration struct {
|
||
}
|
||
|
||
// Alert returns a alert string ,默认振铃
|
||
func (a *AlertVibration) Alert() string {
|
||
return "vibrating humming ... vibrating humming...vibrating humming..."
|
||
}
|
||
|
||
// AlertSong implements beep alert
|
||
type AlertSong struct {
|
||
}
|
||
|
||
// Alert returns a new alert string 歌曲振铃,设置这个状态模式,闹钟只会唱歌
|
||
func (a *AlertSong) Alert() string {
|
||
return "sun rise ,get up ,get up get up..."
|
||
}
|