[MM-54757] Stop broadcasting channel_deleted/channel_restored messages from private channels to non-members (#27001)

* [MM-54757] Stop broadcasting channel_deleted/channel_restored messages from private channels to non-members

* Remove unnecessary return

---------

Co-authored-by: Mattermost Build <build@mattermost.com>

server/channels/app/channel.go

@@ -764,7 +764,12 @@ func (a *App) RestoreChannel(c request.CTX, channel *model.Channel, userID strin
 	channel.DeleteAt = 0
 	a.Srv().Platform().InvalidateCacheForChannel(channel)
 
-	message := model.NewWebSocketEvent(model.WebsocketEventChannelRestored, channel.TeamId, "", "", nil, "")
+	var message *model.WebSocketEvent
+	if channel.Type == model.ChannelTypeOpen {
+		message = model.NewWebSocketEvent(model.WebsocketEventChannelRestored, channel.TeamId, "", "", nil, "")
+	} else {
+		message = model.NewWebSocketEvent(model.WebsocketEventChannelRestored, "", channel.Id, "", nil, "")
+	}
 	message.Add("channel_id", channel.Id)
 	a.Publish(message)
 
@@ -1497,7 +1502,12 @@ func (a *App) DeleteChannel(c request.CTX, channel *model.Channel, userID string
 
 	a.Srv().Platform().InvalidateCacheForChannel(channel)
 
-	message := model.NewWebSocketEvent(model.WebsocketEventChannelDeleted, channel.TeamId, "", "", nil, "")
+	var message *model.WebSocketEvent
+	if channel.Type == model.ChannelTypeOpen {
+		message = model.NewWebSocketEvent(model.WebsocketEventChannelDeleted, channel.TeamId, "", "", nil, "")
+	} else {
+		message = model.NewWebSocketEvent(model.WebsocketEventChannelDeleted, "", channel.Id, "", nil, "")
+	}
 	message.Add("channel_id", channel.Id)
 	message.Add("delete_at", deleteAt)
 	a.Publish(message)
@@ -3078,8 +3088,13 @@ func (a *App) PermanentDeleteChannel(c request.CTX, channel *model.Channel) *mod
 	}
 
 	a.Srv().Platform().InvalidateCacheForChannel(channel)
-	message := model.NewWebSocketEvent(model.WebsocketEventChannelDeleted, channel.TeamId, "", "", nil, "")
 
+	var message *model.WebSocketEvent
+	if channel.Type == model.ChannelTypeOpen {
+		message = model.NewWebSocketEvent(model.WebsocketEventChannelDeleted, channel.TeamId, "", "", nil, "")
+	} else {
+		message = model.NewWebSocketEvent(model.WebsocketEventChannelDeleted, "", channel.Id, "", nil, "")
+	}
 	message.Add("channel_id", channel.Id)
 	message.Add("delete_at", deleteAt)
 	a.Publish(message)