Fixup APIs, Error handling and formatting

model/keyBundle.go

@@ -2,15 +2,18 @@ package model
 
 import "errors"
 
+// KeyType provides a wrapper for a generic public key type identifier (could be an onion address, a zcash address etc.)
+type KeyType string
+
 const (
-	// KeyTypeOnion - a cwtch address
-	KeyTypeOnion = "onion" // bulletin board
+	// KeyTypeServerOnion - a cwtch address
+	KeyTypeServerOnion = KeyType("bulletin_board_onion") // bulletin board
 
 	// KeyTypeTokenOnion - a cwtch peer with a PoW based token protocol
-	KeyTypeTokenOnion = "token_onion"
+	KeyTypeTokenOnion = KeyType("token_service_onion")
 
 	//KeyTypePrivacyPass - a privacy pass based token server
-	KeyTypePrivacyPass = "pp_key"
+	KeyTypePrivacyPass = KeyType("privacy_pass_public_key")
 )
 
 // Key provides a wrapper for a generic public key identifier (could be an onion address, a zcash address etc.)
@@ -18,18 +21,18 @@ type Key string
 
 // KeyBundle manages a collection of related keys for various different services.
 type KeyBundle struct {
-	Keys map[string]Key
+	Keys map[KeyType]Key
 }
 
-// HasKey returns true if the bundle has a public key of a given type.
-func (kb *KeyBundle) HasKey(name string) bool {
-	_, exists := kb.Keys[name]
+// HasKeyType returns true if the bundle has a public key of a given type.
+func (kb *KeyBundle) HasKeyType(keytype KeyType) bool {
+	_, exists := kb.Keys[keytype]
 	return exists
 }
 
 // GetKey retrieves a key with a given type from the bundle
-func (kb *KeyBundle) GetKey(name string) (Key, error) {
-	key, exists := kb.Keys[name]
+func (kb *KeyBundle) GetKey(keytype KeyType) (Key, error) {
+	key, exists := kb.Keys[keytype]
 	if exists {
 		return key, nil
 	}
@@ -40,7 +43,7 @@ func (kb *KeyBundle) GetKey(name string) (Key, error) {
 func (kb *KeyBundle) AttributeBundle() map[string]string {
 	ab := make(map[string]string)
 	for k, v := range kb.Keys {
-		ab[k] = string(v)
+		ab[string(k)] = string(v)
 	}
 	return ab
 }

model/profile.go

@@ -78,6 +78,14 @@ func (p *PublicProfile) SetAttribute(name string, value string) {
 	p.Attributes[name] = value
 }
 
+// IsServer returns true if the onion address is associated with a server.
+func (p *PublicProfile) IsServer(onion string) bool {
+	if _, isServer := p.GetAttribute(string(KeyTypeServerOnion)); isServer == true {
+		return true
+	}
+	return false
+}
+
 // GetAttribute returns the value of a value set with SetCustomAttribute. If no such value has been set exists is set to false.
 func (p *PublicProfile) GetAttribute(name string) (value string, exists bool) {
 	p.lock.Lock()

peer/cwtch_peer.go

@@ -48,7 +48,7 @@ type CwtchPeer interface {
 	DeleteContact(string)
 	DeleteGroup(string)
 
-	AddServer(string)
+	AddServer(string) error
 	JoinServer(string)
 	SendMessageToGroup(string, string) error
 	SendMessageToGroupTracked(string, string) (string, error)
@@ -205,36 +205,41 @@ func (cp *cwtchPeer) AddContact(nick, onion string, authorization model.Authoriz
 	cp.eventBus.Publish(event.NewEventList(event.SetPeerAttribute, event.RemotePeer, onion, event.SaveHistoryKey, event.DeleteHistoryDefault))
 }
 
-func (cp *cwtchPeer) AddServer(serverSpecification string) {
+func (cp *cwtchPeer) AddServer(serverSpecification string) error {
 	keyBundle := new(model.KeyBundle)
-	json.Unmarshal([]byte(serverSpecification), &keyBundle)
-
+	err := json.Unmarshal([]byte(serverSpecification), &keyBundle)
 	log.Debugf("Got new key bundle %v", keyBundle)
-
-	if keyBundle.HasKey(model.KeyTypeOnion) {
-		onionKey, _ := keyBundle.GetKey(model.KeyTypeOnion)
+	if keyBundle.HasKeyType(model.KeyTypeServerOnion) {
+		onionKey, _ := keyBundle.GetKey(model.KeyTypeServerOnion)
 		onion := string(onionKey)
-		decodedPub, _ := base32.StdEncoding.DecodeString(strings.ToUpper(onion))
-		ab := keyBundle.AttributeBundle()
-		ab["nick"] = onion
-		pp := &model.PublicProfile{Name: onion, Ed25519PublicKey: decodedPub, Authorization: model.AuthUnknown, Onion: onion, Attributes: ab}
 
-		cp.Profile.AddContact(onion, pp)
-		pd, _ := json.Marshal(pp)
-		cp.eventBus.Publish(event.NewEvent(event.PeerCreated, map[event.Field]string{
-			event.Data:       string(pd),
-			event.RemotePeer: onion,
-		}))
+		if cp.GetContact(onion) == nil {
+			decodedPub, _ := base32.StdEncoding.DecodeString(strings.ToUpper(onion))
+			ab := keyBundle.AttributeBundle()
+			ab["nick"] = onion
+			pp := &model.PublicProfile{Name: onion, Ed25519PublicKey: decodedPub, Authorization: model.AuthUnknown, Onion: onion, Attributes: ab}
 
-		// Publish every key as an attribute
-		for k, v := range ab {
-			log.Debugf("Server (%v) has %v key %v", onion, k, v)
-			cp.eventBus.Publish(event.NewEventList(event.SetPeerAttribute, event.RemotePeer, onion, k, v))
+			cp.Profile.AddContact(onion, pp)
+			pd, _ := json.Marshal(pp)
+			cp.eventBus.Publish(event.NewEvent(event.PeerCreated, map[event.Field]string{
+				event.Data:       string(pd),
+				event.RemotePeer: onion,
+			}))
+
+			// Publish every key as an attribute
+			for k, v := range ab {
+				log.Debugf("Server (%v) has %v key %v", onion, k, v)
+				cp.eventBus.Publish(event.NewEventList(event.SetPeerAttribute, event.RemotePeer, onion, k, v))
+			}
+
+			// Default to Deleting Peer History
+			cp.eventBus.Publish(event.NewEventList(event.SetPeerAttribute, event.RemotePeer, onion, event.SaveHistoryKey, event.DeleteHistoryDefault))
+			return nil
 		}
-
-		// Default to Deleting Peer History
-		cp.eventBus.Publish(event.NewEventList(event.SetPeerAttribute, event.RemotePeer, onion, event.SaveHistoryKey, event.DeleteHistoryDefault))
+		// Server Already Exists
+		return errors.New("a contact already exists with the given onion address")
 	}
+	return err
 }
 
 // GetContacts returns an unordered list of onions
@@ -332,8 +337,8 @@ func (cp *cwtchPeer) InviteOnionToGroup(onion string, groupid string) error {
 // JoinServer manages a new server connection with the given onion address
 func (cp *cwtchPeer) JoinServer(onion string) {
 	if cp.GetContact(onion) != nil {
-		tokenY, yExists := cp.GetContact(onion).GetAttribute(model.KeyTypePrivacyPass)
-		tokenOnion, onionExists := cp.GetContact(onion).GetAttribute(model.KeyTypeTokenOnion)
+		tokenY, yExists := cp.GetContact(onion).GetAttribute(string(model.KeyTypePrivacyPass))
+		tokenOnion, onionExists := cp.GetContact(onion).GetAttribute(string(model.KeyTypeTokenOnion))
 		if yExists && onionExists {
 			cp.eventBus.Publish(event.NewEvent(event.JoinServer, map[event.Field]string{event.GroupServer: onion, event.ServerTokenY: tokenY, event.ServerTokenOnion: tokenOnion}))
 		}

server/server.go

@@ -84,9 +84,9 @@ func (s *Server) Run(acn connectivity.ACN) {
 
 // KeyBundle provides the keybundle of the server (mostly used for testing)
 func (s *Server) KeyBundle() model.KeyBundle {
-	kb := model.KeyBundle{Keys: make(map[string]model.Key)}
+	kb := model.KeyBundle{Keys: make(map[model.KeyType]model.Key)}
 	identity := s.config.Identity()
-	kb.Keys[model.KeyTypeOnion] = model.Key(identity.Hostname())
+	kb.Keys[model.KeyTypeServerOnion] = model.Key(identity.Hostname())
 	kb.Keys[model.KeyTypeTokenOnion] = model.Key(tor.GetTorV3Hostname(s.tokenService.PublicKey()))
 	kb.Keys[model.KeyTypePrivacyPass] = model.Key(s.tokenServer.Y.String())
 	return kb