Add initial support for getting ChannelMember info of all bridges (#678)

* 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.

* Add ChannelMembers support to the slack bridge

1 files changed, 17 insertions, 0 deletions

diff --git a/gateway/handlers.go b/gateway/handlers.go
index 741c312e..5af13c14 100644
--- a/gateway/handlers.go
+++ b/gateway/handlers.go
@@ -30,6 +30,23 @@ func (r *Router) handleEventFailure(msg *config.Message) {
 	}
 }
 
+// handleEventGetChannelMembers handles channel members
+func (r *Router) handleEventGetChannelMembers(msg *config.Message) {
+	if msg.Event != config.EventGetChannelMembers {
+		return
+	}
+	for _, gw := range r.Gateways {
+		for _, br := range gw.Bridges {
+			if msg.Account == br.Account {
+				cMembers := msg.Extra[config.EventGetChannelMembers][0].(config.ChannelMembers)
+				flog.Debugf("Syncing channelmembers from %s", msg.Account)
+				br.SetChannelMembers(&cMembers)
+				return
+			}
+		}
+	}
+}
+
 // handleEventRejoinChannels handles rejoining of channels.
 func (r *Router) handleEventRejoinChannels(msg *config.Message) {
 	if msg.Event != config.EventRejoinChannels {