add purchasing in analytics endpoint

internal/transformer/analytics_transformer_test.go

@@ -0,0 +1,76 @@
+package transformer
+
+import (
+	"encoding/json"
+	"testing"
+	"time"
+
+	"apskel-pos-be/internal/contract"
+	"apskel-pos-be/internal/models"
+
+	"github.com/google/uuid"
+	"github.com/stretchr/testify/require"
+)
+
+func TestPurchasingAnalyticsContractToModelParsesDateRangeAndOutlet(t *testing.T) {
+	orgID := uuid.New()
+	outletID := uuid.New().String()
+
+	req := &contract.PurchasingAnalyticsRequest{
+		OrganizationID: orgID,
+		OutletID:       &outletID,
+		DateFrom:       "01-05-2026",
+		DateTo:         "02-05-2026",
+		GroupBy:        "week",
+	}
+
+	result := PurchasingAnalyticsContractToModel(req)
+
+	require.Equal(t, orgID, result.OrganizationID)
+	require.NotNil(t, result.OutletID)
+	require.Equal(t, outletID, result.OutletID.String())
+	require.Equal(t, "week", result.GroupBy)
+
+	location, err := time.LoadLocation("Asia/Jakarta")
+	require.NoError(t, err)
+	require.Equal(t, time.Date(2026, 5, 1, 0, 0, 0, 0, location), result.DateFrom)
+	require.Equal(t, time.Date(2026, 5, 2, 23, 59, 59, int(time.Second-time.Nanosecond), location), result.DateTo)
+}
+
+func TestPurchasingAnalyticsContractToModelIgnoresInvalidOutlet(t *testing.T) {
+	outletID := "not-a-uuid"
+
+	result := PurchasingAnalyticsContractToModel(&contract.PurchasingAnalyticsRequest{
+		OutletID: &outletID,
+		DateFrom: "01-05-2026",
+		DateTo:   "02-05-2026",
+	})
+
+	require.Nil(t, result.OutletID)
+}
+
+func TestPurchasingAnalyticsModelToContractCopiesOutletName(t *testing.T) {
+	outletID := uuid.New()
+	outletName := "Main Outlet"
+
+	result := PurchasingAnalyticsModelToContract(&models.PurchasingAnalyticsResponse{
+		OrganizationID: uuid.New(),
+		OutletID:       &outletID,
+		OutletName:     &outletName,
+	})
+
+	require.NotNil(t, result)
+	require.Equal(t, &outletID, result.OutletID)
+	require.NotNil(t, result.OutletName)
+	require.Equal(t, outletName, *result.OutletName)
+}
+
+func TestPurchasingAnalyticsModelToContractOmitsNilOutletName(t *testing.T) {
+	result := PurchasingAnalyticsModelToContract(&models.PurchasingAnalyticsResponse{
+		OrganizationID: uuid.New(),
+	})
+
+	payload, err := json.Marshal(result)
+	require.NoError(t, err)
+	require.NotContains(t, string(payload), "outlet_name")
+}