Feat: save/load state

handlers/actions.go

@@ -3,6 +3,7 @@ package handlers
 import (
 	"context"
 	"encoding/json"
+	"errors"
 	"golias/models"
 )
 
@@ -28,7 +29,44 @@ func getRoomIDFromCtx(ctx context.Context) string {
 	return id
 }
 
+func getStateByCtx(ctx context.Context) (*models.UserState, error) {
+	username, ok := ctx.Value(models.CtxUsernameKey).(string)
+	if !ok {
+		log.Debug("no username in ctx")
+		return &models.UserState{}, errors.New("no username in ctx")
+	}
+	us, err := loadState(username)
+	if err != nil {
+		return &models.UserState{}, err
+	}
+	return us, nil
+}
+
 // cache
+
+func saveState(username string, state *models.UserState) error {
+	key := models.CacheStatePrefix + username
+	data, err := json.Marshal(state)
+	if err != nil {
+		return err
+	}
+	memcache.Set(key, data)
+	return nil
+}
+
+func loadState(username string) (*models.UserState, error) {
+	key := models.CacheStatePrefix + username
+	data, err := memcache.Get(key)
+	if err != nil {
+		return nil, err
+	}
+	resp := &models.UserState{}
+	if err := json.Unmarshal(data, &resp); err != nil {
+		return nil, err
+	}
+	return resp, nil
+}
+
 func getAllNames() []string {
 	names := []string{}
 	// will not scale

handlers/auth.go

@@ -80,6 +80,8 @@ func HandleFrontLogin(w http.ResponseWriter, r *http.Request) {
 	// }
 	// state := models.InitState(cleanName)
 	state := models.MakeTestState()
+	// save state to cache
+	saveState(cleanName, state)
 	tmpl.ExecuteTemplate(w, "base", state)
 }
 

handlers/handlers.go

@@ -2,7 +2,6 @@ package handlers
 
 import (
 	"golias/config"
-	"golias/models"
 	"golias/pkg/cache"
 	"html/template"
 	"log/slog"
@@ -57,6 +56,7 @@ func HandleHome(w http.ResponseWriter, r *http.Request) {
 	// 	tmpl.ExecuteTemplate(w, "room", userState)
 	// 	return
 	// }
-	userState := models.MakeTestState()
+	// userState := models.MakeTestState()
+	userState, _ := getStateByCtx(r.Context())
 	tmpl.ExecuteTemplate(w, "base", userState)
 }

models/keys.go

@@ -5,5 +5,6 @@ var (
 	CtxUsernameKey = "username"
 	CtxSessionKey  = "session"
 	// cache
-	CacheRoomPrefix = "room#"
+	CacheRoomPrefix  = "room#"
+	CacheStatePrefix = "state-"
 )