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go get -u github.com/plimble/godux
package main
import (
"fmt"
"time"
"github.com/plimble/godux"
)
const (
GET_USER = "GET_USER"
INCREASE_COUNTER = "INCREASE_COUNTER"
)
type UserState struct {
Username string
}
type AppState struct {
Count int
User UserState
}
func GetUser(username string) godux.ActionCreator {
return func(dispatch godux.Dispatch, getState godux.GetState) {
dispatch(godux.Action{
Type: GET_USER,
Payload: username,
})
}
}
func IncreaseCounter() godux.ActionCreator {
return func(dispatch godux.Dispatch, getState godux.GetState) {
dispatch(godux.Action{
Type: INCREASE_COUNTER,
})
}
}
func UserReducer(state interface{}, action godux.Action) interface{} {
appState := state.(AppState)
switch action.Type {
case GET_USER:
appState.User.Username = action.Payload.(string)
return appState
default:
return state
}
}
func CounterReducer(state interface{}, action godux.Action) interface{} {
appState := state.(AppState)
switch action.Type {
case INCREASE_COUNTER:
appState.Count += 1
return appState
default:
return state
}
}
func Logger(dispatch godux.Dispatch, action godux.Action, next godux.Next) {
fmt.Println("Before")
next(action)
fmt.Println("After")
}
func main() {
store := godux.NewStore(AppState{}, []godux.ReducerHandler{
UserReducer,
CounterReducer,
})
defer store.Close()
store.ApplyMiddleware(Logger)
store.Subscribe(func(state interface{}, action godux.Action) {
s := state.(AppState)
fmt.Println("Action", action.Type, "Count", s.Count, "Username", s.User.Username)
})
store.Dispatch(GetUser("userABC"))
store.Dispatch(IncreaseCounter())
store.Dispatch(IncreaseCounter())
store.Dispatch(IncreaseCounter())
store.Dispatch(GetUser("userXYZ"))
time.Sleep(1 * time.Second)
}