pilorama

type CIDDescriptor struct {
	CID      cidSDK.ID
	Position int
	Size     int
}

type Forest interface {
	// TreeMove moves node in the tree.
	// If the parent of the move operation is TrashID, the node is removed.
	// If the child of the move operation is RootID, new ID is generated and added to a tree.
	TreeMove(d CIDDescriptor, treeID string, m *Move) (*LogMove, error)
	// TreeAddByPath adds new node in the tree using provided path.
	// The path is constructed by descending from the root using the values of the attr in meta.
	// Internal nodes in path should have exactly one attribute, otherwise a new node is created.
	TreeAddByPath(d CIDDescriptor, treeID string, attr string, path []string, meta []KeyValue) ([]LogMove, error)
	// TreeApply applies replicated operation from another node.
	TreeApply(d CIDDescriptor, treeID string, m *Move) error
	// TreeGetByPath returns all nodes corresponding to the path.
	// The path is constructed by descending from the root using the values of the
	// AttributeFilename in meta.
	// The last argument determines whether only the node with the latest timestamp is returned.
	// Should return ErrTreeNotFound if the tree is not found, and empty result if the path is not in the tree.
	TreeGetByPath(cid cidSDK.ID, treeID string, attr string, path []string, latest bool) ([]Node, error)
	// TreeGetMeta returns meta information of the node with the specified ID.
	// Should return ErrTreeNotFound if the tree is not found, and empty result if the node is not in the tree.
	TreeGetMeta(cid cidSDK.ID, treeID string, nodeID Node) (Meta, Node, error)
	// TreeGetChildren returns children of the node with the specified ID. The order is arbitrary.
	// Should return ErrTreeNotFound if the tree is not found, and empty result if the node is not in the tree.
	TreeGetChildren(cid cidSDK.ID, treeID string, nodeID Node) ([]uint64, error)
	// TreeGetOpLog returns first log operation stored at or above the height.
	// In case no such operation is found, empty Move and nil error should be returned.
	TreeGetOpLog(cid cidSDK.ID, treeID string, height uint64) (Move, error)
}

type ForestStorage interface {
	// DumpInfo returns information about the pilorama.
	DumpInfo() Info
	Init() error
	Open(bool) error
	Close() error
	SetMode(m mode.Mode) error
	Forest
}

type Info struct {
	// Path contains path to the root-directory of the pilorama.
	Path string
	// Backend is the pilorama storage type. Either "boltdb" or "memory".
	Backend string
}

type KeyValue struct {
	Key   string
	Value []byte
}

type LogMove struct {
	Move
	HasOld bool
	Old    nodeInfo
}

type Meta struct {
	Time  Timestamp
	Items []KeyValue
}

type Move struct {
	Parent Node
	Meta
	// Child represents the ID of a node being moved. If zero, new ID is generated.
	Child Node
}

type Node = uint64

type Option func(*cfg)

type Timestamp = uint64