connections, handler: Rename UserFromAuthFunc to Authenticate

This function name feels a little less stuttery and more familiar.

Author: Jannis Pohlmann

connections.go

@@ -66,9 +66,9 @@ func (msg OperationMessage) String() string {
 	return "<invalid>"
 }
 
-// UserFromAuthTokenFunc is a function that resolves an auth token
+// AuthenticateFunc is a function that resolves an auth token
 // into a user (or returns an error if that isn't possible).
-type UserFromAuthTokenFunc func(token string) (interface{}, error)
+type AuthenticateFunc func(token string) (interface{}, error)
 
 // ConnectionEventHandlers define the event handlers for a connection.
 // Event handlers allow other system components to react to events such
@@ -95,8 +95,8 @@ type ConnectionEventHandlers struct {
 // ConnectionConfig defines the configuration parameters of a
 // GraphQL WebSocket connection.
 type ConnectionConfig struct {
-	UserFromAuthToken UserFromAuthTokenFunc
-	EventHandlers     ConnectionEventHandlers
+	Authenticate  AuthenticateFunc
+	EventHandlers ConnectionEventHandlers
 }
 
 // Connection is an interface to represent GraphQL WebSocket connections.
@@ -268,8 +268,8 @@ func (conn *connection) readLoop() {
 			if err := json.Unmarshal(rawPayload, &data); err != nil {
 				conn.SendError(errors.New("Invalid GQL_CONNECTION_INIT payload"))
 			} else {
-				if conn.config.UserFromAuthToken != nil {
-					user, err := conn.config.UserFromAuthToken(data.AuthToken)
+				if conn.config.Authenticate != nil {
+					user, err := conn.config.Authenticate(data.AuthToken)
 					if err != nil {
 						conn.SendError(fmt.Errorf("Failed to authenticate user: %v", err))
 					} else {

examples/simple-server/main.go

@@ -33,7 +33,7 @@ func main() {
 	subscriptionManager := graphqlws.NewSubscriptionManager(&schema)
 	websocketHandler := graphqlws.NewHandler(graphqlws.HandlerConfig{
 		SubscriptionManager: subscriptionManager,
-		UserFromAuthToken: func(token string) (interface{}, error) {
+		Authenticate: func(token string) (interface{}, error) {
 			return "Default user", nil
 		},
 	})

handler.go

@@ -10,7 +10,7 @@ import (
 // HandlerConfig stores the configuration of a GraphQL WebSocket handler.
 type HandlerConfig struct {
 	SubscriptionManager SubscriptionManager
-	UserFromAuthToken   UserFromAuthTokenFunc
+	Authenticate        AuthenticateFunc
 }
 
 // NewHandler creates a WebSocket handler for GraphQL WebSocket connections.
@@ -50,7 +50,7 @@ func NewHandler(config HandlerConfig) http.Handler {
 
 			// Establish a GraphQL WebSocket connection
 			conn := NewConnection(ws, ConnectionConfig{
-				UserFromAuthToken: config.UserFromAuthToken,
+				Authenticate: config.Authenticate,
 				EventHandlers: ConnectionEventHandlers{
 					Close: func(conn Connection) {
 						logger.WithFields(log.Fields{