/
selection.go
73 lines (61 loc) · 1.3 KB
/
selection.go
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package selection
import (
"sync"
"github.com/iotaledger/hive.go/v2/autopeering/peer"
"github.com/iotaledger/hive.go/v2/identity"
)
type Selector interface {
Select(candidates peer.PeerDistance) *peer.Peer
}
type Filter struct {
internal map[identity.ID]bool
conditions []func(*peer.Peer) bool
lock sync.RWMutex
}
func NewFilter() *Filter {
return &Filter{
internal: make(map[identity.ID]bool),
}
}
func (f *Filter) Apply(list []peer.PeerDistance) (filtered []peer.PeerDistance) {
f.lock.RLock()
defer f.lock.RUnlock()
list:
for _, p := range list {
if _, contains := f.internal[p.Remote.ID()]; contains {
continue
}
for _, c := range f.conditions {
if !c(p.Remote) {
continue list
}
}
filtered = append(filtered, p)
}
return
}
func (f *Filter) AddPeers(n []*peer.Peer) {
f.lock.Lock()
for _, p := range n {
f.internal[p.ID()] = true
}
f.lock.Unlock()
}
func (f *Filter) AddPeer(peer identity.ID) {
f.lock.Lock()
f.internal[peer] = true
f.lock.Unlock()
}
func (f *Filter) RemovePeer(peer identity.ID) {
f.lock.Lock()
f.internal[peer] = false
f.lock.Unlock()
}
func (f *Filter) AddCondition(c func(p *peer.Peer) bool) {
f.conditions = append(f.conditions, c)
}
func (f *Filter) Clean() {
f.lock.Lock()
f.internal = make(map[identity.ID]bool)
f.lock.Unlock()
}