mirror of
https://github.com/crazybber/go-pattern-examples.git
synced 2024-11-25 21:26:03 +03:00
97 lines
1.3 KiB
Go
97 lines
1.3 KiB
Go
|
package state
|
||
|
|
|
||
|
|
import "fmt"
|
||
|
|
|
||
|
|
type Week interface {
|
||
|
|
Today()
|
||
|
|
Next(*DayContext)
|
||
|
|
}
|
||
|
|
|
||
|
|
type DayContext struct {
|
||
|
|
today Week
|
||
|
|
}
|
||
|
|
|
||
|
|
func NewDayContext() *DayContext {
|
||
|
|
return &DayContext{
|
||
|
|
today: &Sunday{},
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func (d *DayContext) Today() {
|
||
|
|
d.today.Today()
|
||
|
|
}
|
||
|
|
|
||
|
|
func (d *DayContext) Next() {
|
||
|
|
d.today.Next(d)
|
||
|
|
}
|
||
|
|
|
||
|
|
type Sunday struct{}
|
||
|
|
|
||
|
|
func (*Sunday) Today() {
|
||
|
|
fmt.Printf("Sunday\n")
|
||
|
|
}
|
||
|
|
|
||
|
|
func (*Sunday) Next(ctx *DayContext) {
|
||
|
|
ctx.today = &Monday{}
|
||
|
|
}
|
||
|
|
|
||
|
|
type Monday struct{}
|
||
|
|
|
||
|
|
func (*Monday) Today() {
|
||
|
|
fmt.Printf("Monday\n")
|
||
|
|
}
|
||
|
|
|
||
|
|
func (*Monday) Next(ctx *DayContext) {
|
||
|
|
ctx.today = &Tuesday{}
|
||
|
|
}
|
||
|
|
|
||
|
|
type Tuesday struct{}
|
||
|
|
|
||
|
|
func (*Tuesday) Today() {
|
||
|
|
fmt.Printf("Tuesday\n")
|
||
|
|
}
|
||
|
|
|
||
|
|
func (*Tuesday) Next(ctx *DayContext) {
|
||
|
|
ctx.today = &Wednesday{}
|
||
|
|
}
|
||
|
|
|
||
|
|
type Wednesday struct{}
|
||
|
|
|
||
|
|
func (*Wednesday) Today() {
|
||
|
|
fmt.Printf("Wednesday\n")
|
||
|
|
}
|
||
|
|
|
||
|
|
func (*Wednesday) Next(ctx *DayContext) {
|
||
|
|
ctx.today = &Thursday{}
|
||
|
|
}
|
||
|
|
|
||
|
|
type Thursday struct{}
|
||
|
|
|
||
|
|
func (*Thursday) Today() {
|
||
|
|
fmt.Printf("Thursday\n")
|
||
|
|
}
|
||
|
|
|
||
|
|
func (*Thursday) Next(ctx *DayContext) {
|
||
|
|
ctx.today = &Friday{}
|
||
|
|
}
|
||
|
|
|
||
|
|
type Friday struct{}
|
||
|
|
|
||
|
|
func (*Friday) Today() {
|
||
|
|
fmt.Printf("Friday\n")
|
||
|
|
}
|
||
|
|
|
||
|
|
func (*Friday) Next(ctx *DayContext) {
|
||
|
|
ctx.today = &Saturday{}
|
||
|
|
}
|
||
|
|
|
||
|
|
type Saturday struct{}
|
||
|
|
|
||
|
|
func (*Saturday) Today() {
|
||
|
|
fmt.Printf("Saturday\n")
|
||
|
|
}
|
||
|
|
|
||
|
|
func (*Saturday) Next(ctx *DayContext) {
|
||
|
|
ctx.today = &Sunday{}
|
||
|
|
}
|