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any-sync/commonspace/object/tree/objecttree/historytree.go
2023-03-27 23:03:02 +02:00

47 lines
878 B
Go

package objecttree
import (
"errors"
)
var ErrLoadBeforeRoot = errors.New("can't load before root")
type HistoryTree interface {
ReadableObjectTree
}
type historyTree struct {
*objectTree
}
func (h *historyTree) rebuildFromStorage(beforeId string, include bool) (err error) {
ot := h.objectTree
ot.treeBuilder.Reset()
if beforeId == ot.Id() && !include {
return ErrLoadBeforeRoot
}
heads := []string{beforeId}
if beforeId == "" {
heads, err = ot.treeStorage.Heads()
if err != nil {
return
}
} else if !include {
beforeChange, err := ot.treeBuilder.loadChange(beforeId)
if err != nil {
return err
}
heads = beforeChange.PreviousIds
}
ot.tree, err = ot.treeBuilder.build(heads, nil, nil)
if err != nil {
return
}
ot.aclList.RLock()
defer ot.aclList.RUnlock()
state := ot.aclList.AclState()
return ot.readKeysFromAclState(state)
}