objectstore

type Backup struct {
	UUID              string
	Driver            string
	VolumeUUID        string
	SnapshotUUID      string
	SnapshotName      string
	SnapshotCreatedAt string
	CreatedTime       string

	Blocks     []BlockMapping `json:",omitempty"`
	SingleFile BackupFile     `json:",omitempty"`
}

type BackupFile struct {
	FilePath string
}

type BlockMapping struct {
	Offset        int64
	BlockChecksum string
}

type DeltaBlockBackupOperations interface {
	GetVolumeDevice(id string) (string, error)
	HasSnapshot(id, volumeID string) bool
	CompareSnapshot(id, compareID, volumeID string) (*metadata.Mappings, error)
	OpenSnapshot(id, volumeID string) error
	ReadSnapshot(id, volumeID string, start int64, data []byte) error
	CloseSnapshot(id, volumeID string) error
}

type InitFunc func(destURL string) (ObjectStoreDriver, error)

type ObjectStoreDriver interface {
	Kind() string
	GetURL() string
	FileExists(filePath string) bool
	FileSize(filePath string) int64
	Remove(names ...string) error           // Bahavior like "rm -rf"
	Read(src string) (io.ReadCloser, error) // Caller needs to close
	Write(dst string, rs io.ReadSeeker) error
	List(path string) ([]string, error) // Behavior like "ls", not like "find"
	Upload(src, dst string) error
	Download(src, dst string) error
}

type Snapshot struct {
	UUID        string
	Name        string
	CreatedTime string
}

type Volume struct {
	UUID           string
	Name           string
	Driver         string
	Size           int64
	FileSystem     string
	CreatedTime    string
	LastBackupUUID string
}