binarystorage

type ManagedStorage interface {
	// Get returns a reader for data at path, namespaced to the bucket.
	// If the data is still being uploaded and is not fully written yet,
	// an ErrUploadPending error is returned. This means the path is valid but
	// the caller should try again to retrieve the data.
	Get(ctx context.Context, path string) (r io.ReadCloser, length int64, err error)

	// Put stores data from reader at path, namespaced to the bucket.
	Put(ctx context.Context, path string, r io.Reader, length int64) error

	// Remove deletes data at path, namespaced to the bucket.
	Remove(ctx context.Context, path string) error
}

type Metadata struct {
	Version string
	Size    int64
	SHA256  string
}

type Storage interface {
	// Add adds the binary file and metadata into state, replacing existing
	// metadata if any exists with the specified version.
	Add(context.Context, io.Reader, Metadata) error

	// Open returns the Metadata and binary file contents for the specified
	// version if it exists, else an error satisfying errors.IsNotFound.
	Open(ctx context.Context, version string) (Metadata, io.ReadCloser, error)

	// AllMetadata returns metadata for the full list of binary files in the
	// catalogue.
	AllMetadata() ([]Metadata, error)

	// Metadata returns the Metadata for the specified version if it exists,
	// else an error satisfying errors.IsNotFound.
	Metadata(version string) (Metadata, error)
}

type StorageCloser interface {
	Storage
	Close() error
}