storage

type FSStorage struct {
	// contains filtered or unexported fields
}

type Storage interface {
	// Put writes value to key (overwrites if exists).
	// Key should be a relative path like "sub/file.txt".
	Put(ctx context.Context, key iosystem.Key, value io.Reader) error

	// Get reads value from key (returns auto-closing reader).
	// Returns error if key does not exist.
	Get(ctx context.Context, key iosystem.Key) (io.Reader, error)

	// Has checks if key exists (cheap operation for skip-if-exists logic).
	Has(ctx context.Context, key iosystem.Key) (bool, error)

	// Walk traverses all keys matching prefix pattern.
	// Visitor function is called for each matching document.
	Walk(ctx context.Context, prefix iosystem.Key, visitor func(*iosystem.Document) error) error
}