feat: add carpet

internal/economy/handler.go

@@ -87,6 +87,73 @@ func (h *Handler) BuyCard(w http.ResponseWriter, r *http.Request) {
 	}
 }
 
+// Carpets — GET /api/carpets (فرش‌ها + مالکیت + فرشِ انتخابی)
+func (h *Handler) Carpets(w http.ResponseWriter, r *http.Request) {
+	id, ok := uid(r)
+	if !ok {
+		httpx.Error(w, http.StatusUnauthorized, "unauthorized")
+		return
+	}
+	carpets, err := h.svc.Carpets(r.Context(), id)
+	if err != nil {
+		httpx.Error(w, http.StatusInternalServerError, "server error")
+		return
+	}
+	selected := "classic"
+	if p, _ := h.svc.GetProfile(r.Context(), id); p != nil && p.SelectedCarpet != "" {
+		selected = p.SelectedCarpet
+	}
+	httpx.JSON(w, http.StatusOK, map[string]any{
+		"carpets":  carpets,
+		"selected": selected,
+	})
+}
+
+// BuyCarpet — POST /api/shop/buy-carpet
+func (h *Handler) BuyCarpet(w http.ResponseWriter, r *http.Request) {
+	h.carpetAction(w, r, false)
+}
+
+// SelectCarpet — POST /api/shop/select-carpet
+func (h *Handler) SelectCarpet(w http.ResponseWriter, r *http.Request) {
+	h.carpetAction(w, r, true)
+}
+
+func (h *Handler) carpetAction(w http.ResponseWriter, r *http.Request, sel bool) {
+	id, ok := uid(r)
+	if !ok {
+		httpx.Error(w, http.StatusUnauthorized, "unauthorized")
+		return
+	}
+	var req struct {
+		CarpetID string `json:"carpet_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.SelectCarpet(r.Context(), id, req.CarpetID)
+	} else {
+		err = h.svc.BuyCarpet(r.Context(), id, req.CarpetID)
+	}
+	switch {
+	case err == nil:
+		httpx.JSON(w, http.StatusOK, map[string]string{"message": "ok"})
+	case errors.Is(err, ErrNotFound):
+		httpx.Error(w, http.StatusNotFound, "carpet not found")
+	case errors.Is(err, ErrAlreadyOwned):
+		httpx.Error(w, http.StatusConflict, "already owned")
+	case errors.Is(err, ErrNotOwned):
+		httpx.Error(w, http.StatusForbidden, "carpet not owned")
+	case errors.Is(err, ErrInsufficient):
+		httpx.Error(w, http.StatusPaymentRequired, "insufficient coins")
+	default:
+		httpx.Error(w, http.StatusInternalServerError, "server error")
+	}
+}
+
 // ChatPacks — GET /api/chat-packs (بسته‌های پیام/شکلک + مالکیتِ کاربر)
 func (h *Handler) ChatPacks(w http.ResponseWriter, r *http.Request) {
 	id, ok := uid(r)