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PlayerServer.go
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PlayerServer.go
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package poker
import (
"encoding/json"
"fmt"
"log"
"net/http"
"strconv"
"text/template"
"time"
"github.com/gorilla/websocket"
)
type PlayerServer struct {
store PlayerStore
template *template.Template
game Game
http.Handler
}
func NewPlayerServer(store PlayerStore, game Game) (*PlayerServer, error) {
server := new(PlayerServer)
templ, err := template.ParseFiles(RelativePath("game.html"))
if err != nil {
return nil, fmt.Errorf("problem loading template %v", err)
}
router := http.NewServeMux()
router.Handle("/league", http.HandlerFunc(server.leagueHandler))
router.Handle("/players/", http.HandlerFunc(server.playerHandler))
router.Handle("/game", http.HandlerFunc(server.gameHandler))
router.Handle("/ws", http.HandlerFunc(server.websocket))
server.store = store
server.template = templ
server.Handler = router
server.game = game
return server, nil
}
func (server *PlayerServer) leagueHandler(w http.ResponseWriter, r *http.Request) {
w.Header().Set("content-type", "application/json")
league := server.store.GetLeague()
if err := json.NewEncoder(w).Encode(league); err != nil {
log.Printf("could not encode players err: %#+v\n", err)
w.WriteHeader(http.StatusBadRequest)
} else {
w.WriteHeader(http.StatusOK)
}
}
func (server *PlayerServer) playerHandler(w http.ResponseWriter, r *http.Request) {
player := r.URL.Path[len("/players/"):]
switch r.Method {
case http.MethodPut:
server.update(w, player)
case http.MethodGet:
server.show(w, player)
}
}
func (server *PlayerServer) gameHandler(w http.ResponseWriter, r *http.Request) {
locals := struct{ Year int }{time.Now().Year()}
if err := server.template.Execute(w, locals); err != nil {
http.Error(w, fmt.Sprintf("problem rendering template %s", err.Error()), http.StatusInternalServerError)
}
}
func (server *PlayerServer) websocket(w http.ResponseWriter, r *http.Request) {
ws := newPlayerServerWS(w, r)
numberOfPlayersMessage := ws.WaitForMsg()
numberOfPlayers, err := strconv.Atoi(numberOfPlayersMessage)
if err != nil {
http.Error(w, fmt.Sprintf("could not convert %q to number %v", numberOfPlayersMessage, err), http.StatusInternalServerError)
return
}
server.game.Start(numberOfPlayers, ws)
winner := ws.WaitForMsg()
server.game.Finish(winner)
}
func (server *PlayerServer) show(w http.ResponseWriter, player string) {
score := server.store.GetPlayerScore(player)
if score == 0 {
w.WriteHeader(http.StatusNotFound)
}
fmt.Fprint(w, score)
}
func (server *PlayerServer) update(w http.ResponseWriter, player string) {
server.store.RecordWin(player)
w.WriteHeader(http.StatusAccepted)
}
type playerServerWS struct {
*websocket.Conn
}
func newPlayerServerWS(w http.ResponseWriter, r *http.Request) *playerServerWS {
upgrader := websocket.Upgrader{ReadBufferSize: 1024, WriteBufferSize: 1024}
ws, err := upgrader.Upgrade(w, r, nil)
if err != nil {
http.Error(w, fmt.Sprintf("semething went wrong %v", err), http.StatusInternalServerError)
return nil
}
return &playerServerWS{ws}
}
func (ws *playerServerWS) WaitForMsg() string {
_, message, err := ws.ReadMessage()
if err != nil {
log.Printf("error reading from websocket %v\n", err)
}
return string(message)
}
func (ws *playerServerWS) Write(bytes []byte) (int, error) {
if err := ws.WriteMessage(1, bytes); err != nil {
return 0, err
}
return len(bytes), nil
}