Update vendor (slack)

vendor/github.com/nlopes/slack/websocket_internals.go

@@ -0,0 +1,92 @@
+package slack
+
+import (
+	"fmt"
+	"time"
+)
+
+/**
+ * Internal events, created by this lib and not mapped to Slack APIs.
+ */
+
+// ConnectedEvent is used for when we connect to Slack
+type ConnectedEvent struct {
+	ConnectionCount int // 1 = first time, 2 = second time
+	Info            *Info
+}
+
+// ConnectionErrorEvent contains information about a connection error
+type ConnectionErrorEvent struct {
+	Attempt  int
+	ErrorObj error
+}
+
+func (c *ConnectionErrorEvent) Error() string {
+	return c.ErrorObj.Error()
+}
+
+// ConnectingEvent contains information about our connection attempt
+type ConnectingEvent struct {
+	Attempt         int // 1 = first attempt, 2 = second attempt
+	ConnectionCount int
+}
+
+// DisconnectedEvent contains information about how we disconnected
+type DisconnectedEvent struct {
+	Intentional bool
+}
+
+// LatencyReport contains information about connection latency
+type LatencyReport struct {
+	Value time.Duration
+}
+
+// InvalidAuthEvent is used in case we can't even authenticate with the API
+type InvalidAuthEvent struct{}
+
+// UnmarshallingErrorEvent is used when there are issues deconstructing a response
+type UnmarshallingErrorEvent struct {
+	ErrorObj error
+}
+
+func (u UnmarshallingErrorEvent) Error() string {
+	return u.ErrorObj.Error()
+}
+
+// MessageTooLongEvent is used when sending a message that is too long
+type MessageTooLongEvent struct {
+	Message   OutgoingMessage
+	MaxLength int
+}
+
+func (m *MessageTooLongEvent) Error() string {
+	return fmt.Sprintf("Message too long (max %d characters)", m.MaxLength)
+}
+
+// OutgoingErrorEvent contains information in case there were errors sending messages
+type OutgoingErrorEvent struct {
+	Message  OutgoingMessage
+	ErrorObj error
+}
+
+func (o OutgoingErrorEvent) Error() string {
+	return o.ErrorObj.Error()
+}
+
+// IncomingEventError contains information about an unexpected error receiving a websocket event
+type IncomingEventError struct {
+	ErrorObj error
+}
+
+func (i *IncomingEventError) Error() string {
+	return i.ErrorObj.Error()
+}
+
+// AckErrorEvent i
+type AckErrorEvent struct {
+	ErrorObj error
+}
+
+func (a *AckErrorEvent) Error() string {
+	return a.ErrorObj.Error()
+}