112 lines
2.6 KiB
Go
112 lines
2.6 KiB
Go
package importmgr
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import (
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"encoding/json"
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"fmt"
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"golang.org/x/xerrors"
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"github.com/filecoin-project/go-multistore"
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"github.com/filecoin-project/lotus/lib/blockstore"
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"github.com/ipfs/go-datastore"
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"github.com/ipfs/go-datastore/namespace"
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)
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type Mgr struct {
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mds *multistore.MultiStore
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ds datastore.Batching
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Blockstore blockstore.Blockstore
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}
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type Label string
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const (
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LSource = "source" // Function which created the import
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LRootCid = "root" // Root CID
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LFileName = "filename" // Local file path
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LMTime = "mtime" // File modification timestamp
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)
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func New(mds *multistore.MultiStore, ds datastore.Batching) *Mgr {
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return &Mgr{
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mds: mds,
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Blockstore: mds.MultiReadBlockstore(),
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ds: datastore.NewLogDatastore(namespace.Wrap(ds, datastore.NewKey("/stores")), "storess"),
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}
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}
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type StoreMeta struct {
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Labels map[string]string
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}
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func (m *Mgr) NewStore() (multistore.StoreID, *multistore.Store, error) {
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id := m.mds.Next()
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st, err := m.mds.Get(id)
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if err != nil {
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return 0, nil, err
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}
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meta, err := json.Marshal(&StoreMeta{Labels: map[string]string{
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"source": "unknown",
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}})
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if err != nil {
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return 0, nil, xerrors.Errorf("marshaling empty store metadata: %w", err)
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}
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err = m.ds.Put(datastore.NewKey(fmt.Sprintf("%d", id)), meta)
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return id, st, err
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}
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func (m *Mgr) AddLabel(id multistore.StoreID, key, value string) error { // source, file path, data CID..
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meta, err := m.ds.Get(datastore.NewKey(fmt.Sprintf("%d", id)))
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if err != nil {
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return xerrors.Errorf("getting metadata form datastore: %w", err)
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}
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var sm StoreMeta
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if err := json.Unmarshal(meta, &sm); err != nil {
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return xerrors.Errorf("unmarshaling store meta: %w", err)
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}
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sm.Labels[key] = value
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meta, err = json.Marshal(&sm)
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if err != nil {
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return xerrors.Errorf("marshaling store meta: %w", err)
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}
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return m.ds.Put(datastore.NewKey(fmt.Sprintf("%d", id)), meta)
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}
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func (m *Mgr) List() []multistore.StoreID {
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return m.mds.List()
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}
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func (m *Mgr) Info(id multistore.StoreID) (*StoreMeta, error) {
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meta, err := m.ds.Get(datastore.NewKey(fmt.Sprintf("%d", id)))
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if err != nil {
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return nil, xerrors.Errorf("getting metadata form datastore: %w", err)
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}
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var sm StoreMeta
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if err := json.Unmarshal(meta, &sm); err != nil {
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return nil, xerrors.Errorf("unmarshaling store meta: %w", err)
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}
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return &sm, nil
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}
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func (m *Mgr) Remove(id multistore.StoreID) error {
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if err := m.mds.Delete(id); err != nil {
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return xerrors.Errorf("removing import: %w", err)
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}
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if err := m.ds.Delete(datastore.NewKey(fmt.Sprintf("%d", id))); err != nil {
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return xerrors.Errorf("removing import metadata: %w", err)
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}
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return nil
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}
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