snengame/cmd/server/server.go
2021-09-23 13:04:34 -04:00

63 lines
1.4 KiB
Go

package main
import (
"log"
"net/http"
"time"
"git.saintnet.tech/stryan/snengame/internal/coordinator"
"github.com/gorilla/websocket"
)
var upgrader = websocket.Upgrader{} // use default options
func Serve(c *coordinator.Coordinator) {
http.HandleFunc("/ws", func(w http.ResponseWriter, r *http.Request) {
serveWs(c, w, r)
})
log.Println("starting websocket")
err := http.ListenAndServe(":7636", nil)
if err != nil {
log.Fatal("ListenAndServe: ", err)
}
}
func serveWs(c *coordinator.Coordinator, w http.ResponseWriter, r *http.Request) {
// Upgrade our raw HTTP connection to a websocket based one
conn, err := upgrader.Upgrade(w, r, nil)
if err != nil {
log.Print("Error during connection upgradation:", err)
return
}
defer conn.Close()
// The event loop
for {
var cmd coordinator.SessionCommand
err := conn.ReadJSON(&cmd)
if err != nil {
log.Println("Error during message reading:", err)
break
}
if cmd.Command != coordinator.SessionCmdPoll {
log.Printf("Received: %s", cmd)
}
resp := c.Coordinate(&cmd)
if err != nil {
panic(err)
}
if cmd.Command != coordinator.SessionCmdPoll {
log.Printf("sending: %v", resp)
}
err = conn.WriteJSON(resp)
if err != nil {
log.Println("Error during message writing:", err)
break
}
if resp.Result == coordinator.SessionRespLeft {
time.Sleep(1 * time.Second) //give clients a second to respond
break
}
}
}