app

type Clock interface {
	Now() time.Time
}

type SnapshotStore interface {
	// Save durably replaces the stored snapshot of s.Source.
	Save(ctx context.Context, s domain.Snapshot) error
	// Load returns the stored snapshot of source, or ErrNoSnapshot.
	Load(ctx context.Context, source domain.Source) (domain.Snapshot, error)
}

type SourceFetcher interface {
	// Spec declares the source and what a sane file of it holds.
	Spec() domain.SnapshotSpec
	// Fetch downloads the source and parses it into a snapshot. Sync sets
	// its FetchedAt.
	Fetch(ctx context.Context) (domain.Snapshot, error)
}

type SourceSync struct {
	Source domain.Source
	// LastSuccess is when the snapshot in service was fetched, zero when
	// none is.
	LastSuccess time.Time
	// LastFailure is when the last failed or rejected sync ran, zero when
	// none did. It is kept after a later success.
	LastFailure time.Time
	// LastError is why that sync failed.
	LastError error
	// Rows is the number of rows of the snapshot in service.
	Rows int
	// Newest is the date of the most recent entry in service, zero when the
	// source dates none.
	Newest time.Time
}

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