interfaces

type BlockMap map[int64]*pb.BlockMetadata

type Bucket interface {
	// Get opens a file stream
	Get(ctx context.Context, filename string) (Fetcher, error)

	// Put writes a file to the storage
	Put(ctx context.Context, filename string, file io.Reader, mtime time.Time) error

	// PutAndLock writes a file to the storage and locks it
	PutAndLock(ctx context.Context, filename string, file io.Reader, mtime time.Time) (*pb.LockToken, error)

	// PutWithCacheTTL writes a file and set the cache update interval.
	// This will cache the content in the nodes, no updates will be retrieved
	// from the network until the ttl is timed out
	// ttl is in seconds.
	PutWithCacheTTL(ctx context.Context, filename string, file io.Reader, mtime time.Time, ttl uint64) error

	// Remove deletes a file from the storage
	Remove(ctx context.Context, filename string) error

	// Lock locks a file to avoid replublishing and overwritting during sequential updates from a single writer
	Lock(ctx context.Context, filename string) (*pb.LockToken, error)

	// IsLocked check if a file is locked
	IsLocked(ctx context.Context, filename string) (bool, error)

	// Unlock unlocks a file. See Lock
	Unlock(ctx context.Context, filename string, token *pb.LockToken) error

	Chroot(dir string) Bucket
}

type Core interface {
	// Get opens a file stream
	Get(ctx context.Context, privateKey crabfsCrypto.PrivKey, bucket string, filename string) (Fetcher, error)

	// Put writes a file to the storage
	Put(ctx context.Context, privateKey crabfsCrypto.PrivKey, bucket string, filename string, file io.Reader, mtime time.Time) error

	// PutAndLock writes a file to the storage and locks it
	PutAndLock(ctx context.Context, privateKey crabfsCrypto.PrivKey, bucket string, filename string, file io.Reader, mtime time.Time) (*pb.LockToken, error)

	// PutWithCacheTTL writes a file and set the cache update interval.
	// This will cache the content in the nodes, no updates will be retrieved
	// from the network until the ttl is timed out
	// ttl is in seconds.
	PutWithCacheTTL(ctx context.Context, privateKey crabfsCrypto.PrivKey, bucket string, filename string, file io.Reader, mtime time.Time, ttl uint64) error

	// Remove deletes a file from the storage
	Remove(ctx context.Context, privateKey crabfsCrypto.PrivKey, bucket string, filename string) error

	// Lock locks a file to avoid replublishing and overwritting during sequential updates from a single writer
	Lock(ctx context.Context, privateKey crabfsCrypto.PrivKey, bucket string, filename string) (*pb.LockToken, error)

	// Unlock unlocks a file. See Lock
	Unlock(ctx context.Context, privateKey crabfsCrypto.PrivKey, bucket string, filename string, token *pb.LockToken) error

	// IsLocked check if a file is locked
	IsLocked(ctx context.Context, publicKey crabfsCrypto.PubKey, bucket string, filename string) (bool, error)

	// GetID returns the network id of this node
	GetID() string

	// GetAddrs returns the addresses bound to this node
	GetAddrs() []string

	// Blockstore returns the currently used blockstore
	Blockstore() ipfsBlockstore.Blockstore

	// Host returns the currently used host
	Host() Host

	// GarbageCollector returns the garbage collector associated with this instance
	GarbageCollector() GarbageCollector

	// Close closes this instance and stop all children goroutines
	Close() error

	// WithBucket wraps calls to a single bucket
	WithBucket(privateKey crabfsCrypto.PrivKey, bucket string) (Bucket, error)

	// WithBucketRoot wraps calls to a single bucket and base directory
	WithBucketRoot(privateKey crabfsCrypto.PrivKey, bucket string, baseDir string) (Bucket, error)

	// PublishPublicKey publishes a public key to the network
	PublishPublicKey(publicKey crabfsCrypto.PubKey) error

	// GetIdentity returns the current identity of the node
	GetIdentity() identity.Identity
}

type Fetcher interface {
	io.Reader
	io.Seeker
	io.Closer

	// Size returns the total size of the block map to fetch
	Size() int64

	// Context returns the context of this fetcher
	// context is cancelled with the parent context or when Close is called
	Context() context.Context
}

type FetcherFactory func(ctx context.Context, fs Core, object *pb.CrabObject, privateKey crabfsCrypto.PrivKey) (Fetcher, error)

type GarbageCollector interface {
	// Start starts this garbage collector
	Start() error

	// Schedule schedules a clean up as soon as possible
	Schedule() error

	// Collect perform a clean up now
	Collect() error

	// Locker returns the garbage collector locker
	Locker() sync.Locker
}

type Host interface {
	// Close closes this host and all open connections
	Close() error

	// Announce
	Announce() error

	// GetSwarmPublicKey get the swarm public key from the keystore
	GetSwarmPublicKey(ctx context.Context, hash string) (crabfsCrypto.PubKey, error)

	// Publish publishes a block map
	Publish(ctx context.Context, privateKey crabfsCrypto.PrivKey, cipherKey []byte, bucket string, filename string, blockMap BlockMap, mtime time.Time, size int64) error

	// PublishAndLock publishes a locked block map
	PublishAndLock(ctx context.Context, privateKey crabfsCrypto.PrivKey, cipherKey []byte, bucket string, filename string, blockMap BlockMap, mtime time.Time, size int64) (*pb.LockToken, error)

	// PublishWithCacheTTL same as Publish but specifies a cache ttl timeout.
	// This will cache the content in the nodes, no updates will be retrieved
	// from the network until the ttl is timed out
	// ttl is in seconds.
	PublishWithCacheTTL(ctx context.Context, privateKey crabfsCrypto.PrivKey, cipherKey []byte, bucket string, filename string, blockMap BlockMap, mtime time.Time, size int64, ttl uint64) error

	// Remove removes content from the network
	Remove(ctx context.Context, privateKey crabfsCrypto.PrivKey, bucket string, filename string) error

	// GetContent get the block map specified by 'filename
	GetContent(ctx context.Context, publicKey crabfsCrypto.PubKey, bucket string, filename string) (*pb.CrabObject, error)

	// Lock locks a file to avoid replublishing and overwritting during sequential updates from a single writer
	Lock(ctx context.Context, privateKey crabfsCrypto.PrivKey, bucket string, filename string) (*pb.LockToken, error)

	// Unlock unlocks a file. See Lock
	Unlock(ctx context.Context, privateKey crabfsCrypto.PrivKey, bucket string, filename string, token *pb.LockToken) error

	// IsLocked check if a file is locked
	IsLocked(ctx context.Context, publicKey crabfsCrypto.PubKey, bucket string, filename string) (bool, error)

	// FindProviders find the closest providers of cid
	FindProviders(ctx context.Context, blockMeta *pb.BlockMetadata) <-chan libp2pPeerstore.PeerInfo

	// CreateBlockStream downloads a block 'cid' from peer
	CreateBlockStream(ctx context.Context, blockMeta *pb.BlockMetadata, peer *libp2pPeerstore.PeerInfo) (io.Reader, error)

	// GetID returns the network id of this host
	GetID() string

	// GetAddrs returns the addresses bound to this host
	GetAddrs() []string

	// Reprovide republish blocks and block metas to the network
	Reprovide(ctx context.Context, withBlocks bool) error

	// PutPublicKey broadcast this public key to the network
	PutPublicKey(publicKey crabfsCrypto.PubKey) error

	// Provide publishes a block in the network
	Provide(ctx context.Context, cid cid.Cid) error
}

type Slicer interface {
	// Next return the next block or nil if it has reached eof
	Next() (*pb.BlockMetadata, blocks.Block, int64, error)
}