Add initial relay code

relay/server/store.go

@@ -0,0 +1,48 @@
+package server
+
+import (
+	"sync"
+)
+
+type Store struct {
+	peers     map[string]*Peer // Key is the id (public key or sha-256) of the peer
+	peersLock sync.Mutex
+}
+
+func NewStore() *Store {
+	return &Store{
+		peers: make(map[string]*Peer),
+	}
+}
+
+func (s *Store) AddPeer(peer *Peer) {
+	s.peersLock.Lock()
+	defer s.peersLock.Unlock()
+	s.peers[peer.ID()] = peer
+}
+
+func (s *Store) Link(peer *Peer, peerForeignID string) uint16 {
+	s.peersLock.Lock()
+	defer s.peersLock.Unlock()
+
+	channelId := peer.BindChannel(peerForeignID)
+	dstPeer, ok := s.peers[peerForeignID]
+	if !ok {
+		return channelId
+	}
+
+	foreignChannelID, ok := dstPeer.AddParticipant(peer, channelId)
+	if !ok {
+		return channelId
+	}
+	peer.AddParticipant(dstPeer, foreignChannelID)
+	return channelId
+}
+
+func (s *Store) DeletePeer(peer *Peer) {
+	s.peersLock.Lock()
+	defer s.peersLock.Unlock()
+
+	delete(s.peers, peer.ID())
+	peer.DeleteParticipants()
+}