108 lines
3.1 KiB
Go
108 lines
3.1 KiB
Go
package iface
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import (
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"context"
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path "github.com/ipfs/interface-go-ipfs-core/path"
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"io"
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"github.com/ipfs/interface-go-ipfs-core/options"
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"github.com/ipfs/go-cid"
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ipld "github.com/ipfs/go-ipld-format"
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)
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// ObjectStat provides information about dag nodes
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type ObjectStat struct {
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// Cid is the CID of the node
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Cid cid.Cid
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// NumLinks is number of links the node contains
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NumLinks int
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// BlockSize is size of the raw serialized node
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BlockSize int
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// LinksSize is size of the links block section
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LinksSize int
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// DataSize is the size of data block section
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DataSize int
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// CumulativeSize is size of the tree (BlockSize + link sizes)
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CumulativeSize int
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}
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// ChangeType denotes type of change in ObjectChange
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type ChangeType int
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const (
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// DiffAdd is set when a link was added to the graph
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DiffAdd ChangeType = iota
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// DiffRemove is set when a link was removed from the graph
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DiffRemove
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// DiffMod is set when a link was changed in the graph
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DiffMod
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)
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// ObjectChange represents a change ia a graph
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type ObjectChange struct {
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// Type of the change, either:
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// * DiffAdd - Added a link
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// * DiffRemove - Removed a link
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// * DiffMod - Modified a link
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Type ChangeType
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// Path to the changed link
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Path string
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// Before holds the link path before the change. Note that when a link is
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// added, this will be nil.
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Before path.Resolved
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// After holds the link path after the change. Note that when a link is
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// removed, this will be nil.
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After path.Resolved
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}
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// ObjectAPI specifies the interface to MerkleDAG and contains useful utilities
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// for manipulating MerkleDAG data structures.
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type ObjectAPI interface {
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// New creates new, empty (by default) dag-node.
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New(context.Context, ...options.ObjectNewOption) (ipld.Node, error)
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// Put imports the data into merkledag
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Put(context.Context, io.Reader, ...options.ObjectPutOption) (path.Resolved, error)
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// Get returns the node for the path
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Get(context.Context, path.Path) (ipld.Node, error)
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// Data returns reader for data of the node
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Data(context.Context, path.Path) (io.Reader, error)
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// Links returns lint or links the node contains
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Links(context.Context, path.Path) ([]*ipld.Link, error)
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// Stat returns information about the node
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Stat(context.Context, path.Path) (*ObjectStat, error)
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// AddLink adds a link under the specified path. child path can point to a
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// subdirectory within the patent which must be present (can be overridden
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// with WithCreate option).
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AddLink(ctx context.Context, base path.Path, name string, child path.Path, opts ...options.ObjectAddLinkOption) (path.Resolved, error)
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// RmLink removes a link from the node
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RmLink(ctx context.Context, base path.Path, link string) (path.Resolved, error)
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// AppendData appends data to the node
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AppendData(context.Context, path.Path, io.Reader) (path.Resolved, error)
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// SetData sets the data contained in the node
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SetData(context.Context, path.Path, io.Reader) (path.Resolved, error)
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// Diff returns a set of changes needed to transform the first object into the
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// second.
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Diff(context.Context, path.Path, path.Path) ([]ObjectChange, error)
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}
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