Move channel implementation to its own file. Make VoiceBroadcast work.

channel.go

@@ -0,0 +1,48 @@
+package main
+
+// A Mumble channel
+type Channel struct {
+	Id          int
+	Name        string
+	Description string
+	Temporary   bool
+	Position    int
+
+	clients     map[uint32]*Client
+
+	parent      *Channel
+	children    map[int]*Channel
+}
+
+func NewChannel(id int, name string) (channel *Channel) {
+	channel = new(Channel)
+	channel.Id = id
+	channel.Name = name
+	channel.clients = make(map[uint32]*Client)
+	channel.children = make(map[int]*Channel)
+	return
+}
+
+// Add a child channel to a channel
+func (channel *Channel) AddChild(child *Channel) {
+	child.parent = channel
+	channel.children[child.Id] = child
+}
+
+// Remove a child channel from a parent
+func (channel *Channel) RemoveChild(child *Channel) {
+	child.parent = nil
+	channel.children[child.Id] = nil, false
+}
+
+// Add client
+func (channel *Channel) AddClient(client *Client) {
+	channel.clients[client.Session] = client
+	client.Channel = channel
+}
+
+// Remove client
+func (channel *Channel) RemoveClient(client *Client) {
+	channel.clients[client.Session] = nil, false
+	client.Channel = nil
+}