add server and websocket comms

3 files changed, 135 insertions, 2 deletions

diff --git a/server/api/game.go b/server/api/game.go
new file mode 100644
index 0000000..bccf12a
--- /dev/null
+++ b/server/api/game.go
@@ -0,0 +1,79 @@
+package api
+
+import (
+	"github.com/gorilla/websocket"
+	"net/http"
+	"sakura/engine"
+	"slices"
+	"uuid"
+)
+
+type Conn struct {
+	Socket *websocket.Conn
+}
+
+var upgrader = websocket.Upgrader{}
+
+var games = make(map[uuid.UUID]*engine.Game)
+var connections = make(map[uuid.UUID][]*Conn)
+
+func GameCreate(w http.ResponseWriter, r *http.Request) {
+	id := uuid.NewV7()
+	games[id] = engine.NewGame()
+	w.Write([]byte(id.String()))
+}
+
+func GameConnect(w http.ResponseWriter, r *http.Request) {
+	id := r.PathValue("id")
+	uid, err := uuid.Parse(id)
+	if err != nil {
+		http.Error(w, "unable to parse game uuid "+err.Error(), http.StatusBadRequest)
+		return
+	}
+	game := games[uid]
+	if game == nil {
+		http.Error(w, "game not found", http.StatusNotFound)
+		return
+	}
+	wsConn, err := upgrader.Upgrade(w, r, nil)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+	if wsConn == nil {
+		http.Error(w, "unable to initialize websocket", http.StatusInternalServerError)
+		return
+	}
+	conn := &Conn{wsConn}
+	connections[uid] = append(connections[uid], conn)
+	wsConn.SetCloseHandler(func(code int, text string) error {
+		connections[uid] = slices.DeleteFunc(connections[uid], func(potential *Conn) bool {
+			return potential == conn
+		})
+		return nil
+	})
+	err = wsConn.WriteJSON(game)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+	go PumpRead(uid, game, wsConn)
+}
+
+func Update(id uuid.UUID, g *engine.Game) {
+	for _, c := range connections[id] {
+		_ = c.Socket.WriteJSON(g)
+	}
+}
+
+func PumpRead(id uuid.UUID, g *engine.Game, conn *websocket.Conn) {
+	var interaction engine.InteractionID
+	for {
+		err := conn.ReadJSON(&interaction)
+		if err != nil {
+			break
+		}
+		g.Actions[interaction].Then(g)
+		Update(id, g)
+	}
+}
diff --git a/server/server.go b/server/server.go
index 8230f87..798bab6 100644
--- a/server/server.go
+++ b/server/server.go
@@ -1,11 +1,41 @@
 package server
 
 import (
+	"embed"
 	"fmt"
-	"sakura/data"
+	"github.com/spf13/pflag"
+	"html/template"
+	"net"
+	"net/http"
+	"sakura/cfg"
+	"sakura/server/api"
+	"strconv"
 )
 
+//go:embed web
+var web embed.FS
+
+var tmpl *template.Template
+
 func Start() {
+	pflag.Parse()
 	fmt.Println("Server started")
-	fmt.Printf("Characters: %v\n", data.Characters)
+	addr := net.JoinHostPort(*cfg.Host, strconv.Itoa(*cfg.Port))
+	fmt.Printf("Listening on %s\n", addr)
+	var err error
+	tmpl, err = template.ParseFS(web, "web/**.gohtml")
+	http.HandleFunc("/{$}", serveHome)
+	http.HandleFunc(cfg.CreateMethod+" "+cfg.CreatePath, api.GameCreate)
+	http.HandleFunc(cfg.ConnectMethod+" "+cfg.ConnectPath, api.GameConnect)
+	err = http.ListenAndServe(addr, nil)
+	if err != nil {
+		panic(err)
+	}
+}
+
+func serveHome(w http.ResponseWriter, r *http.Request) {
+	err := tmpl.ExecuteTemplate(w, "index.gohtml", nil)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+	}
 }
diff --git a/server/web/index.gohtml b/server/web/index.gohtml
new file mode 100644
index 0000000..bf60372
--- /dev/null
+++ b/server/web/index.gohtml
@@ -0,0 +1,24 @@
+<!doctype html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport"
+          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
+    <meta http-equiv="X-UA-Compatible" content="ie=edge">
+    <title>Document</title>
+</head>
+<body>
+
+<script>
+    const start = async () => {
+        const game = await fetch("/api/game/create")
+        const gameId = await game.text()
+        const connection = new WebSocket(`/api/game/${gameId}/connect`)
+        connection.addEventListener("message", (ev) => {
+            console.debug(JSON.parse(ev.data))
+        })
+    }
+    start()
+</script>
+</body>
+</html>
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