cache and stats

internal/storage/badger/goodsitem.go

@@ -103,6 +103,10 @@ func (c *goodsItemClient) ListIter(
 func (c *goodsItemClient) List(
 	ctx context.Context,
 ) (out []entity.GoodsItem, err error) {
+	if ctx.Err() != nil {
+		return nil, ctx.Err()
+	}
+
 	err = c.db.View(func(txn *badger.Txn) error {
 		opts := badger.DefaultIteratorOptions
 		opts.PrefetchValues = true
@@ -113,6 +117,10 @@ func (c *goodsItemClient) List(
 		prefix := c.prefix()
 		var cursor int
 		for iter.Seek(prefix); iter.ValidForPrefix(prefix); iter.Next() {
+			if ctx.Err() != nil {
+				return ctx.Err()
+			}
+
 			cursor++
 			current := iter.Item()
 			err = current.Value(func(val []byte) error {
@@ -144,6 +152,10 @@ func (c *goodsItemClient) Get(
 	ctx context.Context,
 	sku string,
 ) (out entity.GoodsItem, err error) {
+	if ctx.Err() != nil {
+		return out, ctx.Err()
+	}
+
 	err = c.db.View(func(txn *badger.Txn) error {
 		key := unsafe.Slice(unsafe.StringData(sku), len(sku))
 		out, err = c.getBySKU(key, txn)
@@ -161,6 +173,10 @@ func (c *goodsItemClient) Get(
 }
 
 func (c *goodsItemClient) GetByCart(ctx context.Context, id int64) (out entity.GoodsItem, err error) {
+	if ctx.Err() != nil {
+		return out, ctx.Err()
+	}
+
 	err = c.db.View(func(txn *badger.Txn) error {
 		idxKey := c.prefixedIDByCartInt64(id)
 		skuByCartIDItem, err := txn.Get(idxKey)
@@ -196,6 +212,10 @@ func (c *goodsItemClient) UpsertMany(ctx context.Context, items ...entity.GoodsI
 }
 
 func (c *goodsItemClient) Delete(ctx context.Context, sku string) (out entity.GoodsItem, err error) {
+	if ctx.Err() != nil {
+		return out, ctx.Err()
+	}
+
 	err = c.db.Update(func(txn *badger.Txn) error {
 		skuKey := c.prefixedStr(sku)
 		out, err = c.getBySKU(skuKey, txn)
@@ -208,6 +228,12 @@ func (c *goodsItemClient) Delete(ctx context.Context, sku string) (out entity.Go
 			return fmt.Errorf("deleting key: %w", err)
 		}
 
+		cartID := c.prefixedIDByCartInt64(out.Cart)
+		err = txn.Delete(cartID)
+		if err != nil {
+			return fmt.Errorf("deleting index key: %w", err)
+		}
+
 		return nil
 	})
 	if err != nil {
@@ -223,10 +249,8 @@ func (c *goodsItemClient) upsertByBatch(ctx context.Context, items []entity.Good
 
 	err := func() error {
 		for _, item := range items {
-			select {
-			case <-ctx.Done():
+			if ctx.Err() != nil {
 				return ctx.Err()
-			default:
 			}
 
 			key := c.prefixedStr(item.Articul)