Christian Schwarz
30 lines
622 B
Go
30 lines
622 B
Go
package pruning
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import "sort"
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type KeepMostRecentCommonAncestor struct {
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_opaque struct{}
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}
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func NewKeepMostRecentCommonAncestor() *KeepMostRecentCommonAncestor {
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return &KeepMostRecentCommonAncestor{}
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}
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func (k *KeepMostRecentCommonAncestor) KeepRule(snaps []Snapshot) (destroyList []Snapshot) {
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var bothSides []Snapshot
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for _, s := range snaps {
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if s.PresentOnBothSides() {
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bothSides = append(bothSides, s)
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}
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}
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if len(bothSides) == 0 {
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return []Snapshot{}
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}
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sort.Slice(bothSides, func(i, j int) bool {
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return bothSides[i].Date().After(bothSides[j].Date())
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})
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return []Snapshot{bothSides[0]}
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}
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