feat: add characters

internal/economy/handler.go

@@ -180,6 +180,73 @@ func (h *Handler) Frames(w http.ResponseWriter, r *http.Request) {
 }
 
 // BuyFrame — POST /api/shop/buy-frame
+// Avatars — GET /api/avatars: کاتالوگِ شخصیت‌ها + انتخابیِ کاربر.
+func (h *Handler) Avatars(w http.ResponseWriter, r *http.Request) {
+	id, ok := uid(r)
+	if !ok {
+		httpx.Error(w, http.StatusUnauthorized, "unauthorized")
+		return
+	}
+	avatars, err := h.svc.Avatars(r.Context(), id)
+	if err != nil {
+		httpx.Error(w, http.StatusInternalServerError, "server error")
+		return
+	}
+	selected := ""
+	if p, _ := h.svc.GetProfile(r.Context(), id); p != nil {
+		selected = p.SelectedAvatar
+	}
+	httpx.JSON(w, http.StatusOK, map[string]any{
+		"avatars":  avatars,
+		"selected": selected,
+	})
+}
+
+// BuyAvatar — POST /api/shop/buy-avatar
+func (h *Handler) BuyAvatar(w http.ResponseWriter, r *http.Request) {
+	h.avatarAction(w, r, false)
+}
+
+// SelectAvatar — POST /api/shop/select-avatar (avatar_id خالی ⇒ آواتارِ پیش‌فرض)
+func (h *Handler) SelectAvatar(w http.ResponseWriter, r *http.Request) {
+	h.avatarAction(w, r, true)
+}
+
+func (h *Handler) avatarAction(w http.ResponseWriter, r *http.Request, sel bool) {
+	id, ok := uid(r)
+	if !ok {
+		httpx.Error(w, http.StatusUnauthorized, "unauthorized")
+		return
+	}
+	var req struct {
+		AvatarID string `json:"avatar_id"`
+	}
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		httpx.Error(w, http.StatusBadRequest, "invalid body")
+		return
+	}
+	var err error
+	if sel {
+		err = h.svc.SelectAvatar(r.Context(), id, req.AvatarID)
+	} else {
+		err = h.svc.BuyAvatar(r.Context(), id, req.AvatarID)
+	}
+	switch {
+	case err == nil:
+		httpx.JSON(w, http.StatusOK, map[string]string{"message": "ok"})
+	case errors.Is(err, ErrNotFound):
+		httpx.Error(w, http.StatusNotFound, "avatar not found")
+	case errors.Is(err, ErrAlreadyOwned):
+		httpx.Error(w, http.StatusConflict, "already owned")
+	case errors.Is(err, ErrNotOwned):
+		httpx.Error(w, http.StatusForbidden, "avatar not owned")
+	case errors.Is(err, ErrInsufficient):
+		httpx.Error(w, http.StatusPaymentRequired, "insufficient coins")
+	default:
+		httpx.Error(w, http.StatusInternalServerError, "server error")
+	}
+}
+
 func (h *Handler) BuyFrame(w http.ResponseWriter, r *http.Request) {
 	h.frameAction(w, r, false)
 }