Add initial support for getting ChannelMember info of all bridges.

Adds an EventGetChannelMembers event, which gets send every x time to
all bridges. Bridges should respond on this event with a Message
containing ChannelMembers in the EventGetChannelMembers key in the
Extra field.

handleEventGetChannelMembers will handle this Message and sets the
contained ChannelMembers to the Bridge struct.

bridge/bridge.go

@@ -5,6 +5,7 @@ import (
 
 	"github.com/42wim/matterbridge/bridge/config"
 	"github.com/sirupsen/logrus"
+	"sync"
 )
 
 type Bridger interface {
@@ -16,14 +17,16 @@ type Bridger interface {
 
 type Bridge struct {
 	Bridger
-	Name     string
-	Account  string
-	Protocol string
-	Channels map[string]config.ChannelInfo
-	Joined   map[string]bool
-	Log      *logrus.Entry
-	Config   config.Config
-	General  *config.Protocol
+	Name           string
+	Account        string
+	Protocol       string
+	Channels       map[string]config.ChannelInfo
+	Joined         map[string]bool
+	ChannelMembers *config.ChannelMembers
+	Log            *logrus.Entry
+	Config         config.Config
+	General        *config.Protocol
+	*sync.RWMutex
 }
 
 type Config struct {
@@ -37,15 +40,17 @@ type Config struct {
 type Factory func(*Config) Bridger
 
 func New(bridge *config.Bridge) *Bridge {
-	b := new(Bridge)
-	b.Channels = make(map[string]config.ChannelInfo)
+	b := &Bridge{
+		Channels: make(map[string]config.ChannelInfo),
+		RWMutex:  new(sync.RWMutex),
+		Joined:   make(map[string]bool),
+	}
 	accInfo := strings.Split(bridge.Account, ".")
 	protocol := accInfo[0]
 	name := accInfo[1]
 	b.Name = name
 	b.Protocol = protocol
 	b.Account = bridge.Account
-	b.Joined = make(map[string]bool)
 	return b
 }
 
@@ -54,6 +59,13 @@ func (b *Bridge) JoinChannels() error {
 	return err
 }
 
+// SetChannelMembers sets the newMembers to the bridge ChannelMembers
+func (b *Bridge) SetChannelMembers(newMembers *config.ChannelMembers) {
+	b.Lock()
+	b.ChannelMembers = newMembers
+	b.Unlock()
+}
+
 func (b *Bridge) joinChannels(channels map[string]config.ChannelInfo, exists map[string]bool) error {
 	for ID, channel := range channels {
 		if !exists[ID] {

bridge/config/config.go

@@ -14,16 +14,17 @@ import (
 )
 
 const (
-	EventJoinLeave       = "join_leave"
-	EventTopicChange     = "topic_change"
-	EventFailure         = "failure"
-	EventFileFailureSize = "file_failure_size"
-	EventAvatarDownload  = "avatar_download"
-	EventRejoinChannels  = "rejoin_channels"
-	EventUserAction      = "user_action"
-	EventMsgDelete       = "msg_delete"
-	EventAPIConnected    = "api_connected"
-	EventUserTyping      = "user_typing"
+	EventJoinLeave         = "join_leave"
+	EventTopicChange       = "topic_change"
+	EventFailure           = "failure"
+	EventFileFailureSize   = "file_failure_size"
+	EventAvatarDownload    = "avatar_download"
+	EventRejoinChannels    = "rejoin_channels"
+	EventUserAction        = "user_action"
+	EventMsgDelete         = "msg_delete"
+	EventAPIConnected      = "api_connected"
+	EventUserTyping        = "user_typing"
+	EventGetChannelMembers = "get_channel_members"
 )
 
 type Message struct {
@@ -61,6 +62,16 @@ type ChannelInfo struct {
 	Options     ChannelOptions
 }
 
+type ChannelMember struct {
+	Username    string
+	Nick        string
+	UserID      string
+	ChannelID   string
+	ChannelName string
+}
+
+type ChannelMembers []ChannelMember
+
 type Protocol struct {
 	AuthCode               string // steam
 	BindAddress            string // mattermost, slack // DEPRECATED