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using Gee;
namespace Xmpp {
public string random_uuid() {
uint32 b1 = Random.next_int();
uint16 b2 = (uint16)Random.next_int();
uint16 b3 = (uint16)(Random.next_int() | 0x4000u) & ~0xb000u;
uint16 b4 = (uint16)(Random.next_int() | 0x8000u) & ~0x4000u;
uint16 b5_1 = (uint16)Random.next_int();
uint32 b5_2 = Random.next_int();
return "%08x-%04x-%04x-%04x-%04x%08x".printf(b1, b2, b3, b4, b5_1, b5_2);
}
public abstract class StanzaListener<T> : OrderedListener {
public abstract async bool run(XmppStream stream, T stanza);
}
public class StanzaListenerHolder<T> : ListenerHolder {
public async bool run(XmppStream stream, T stanza) {
// listeners can change e.g. when switching to another stream
ArrayList<OrderedListener> listeners_copy = new ArrayList<OrderedListener>();
listeners_copy.add_all(listeners);
foreach (OrderedListener ol in listeners_copy) {
StanzaListener<T> l = ol as StanzaListener<T>;
bool stop = yield l.run(stream, stanza);
if (stop) return true;
}
return false;
}
}
public abstract class OrderedListener : Object {
public abstract string action_group { get; }
public abstract string[] after_actions { get; }
}
public abstract class ListenerHolder : Object {
protected ArrayList<OrderedListener> listeners = new ArrayList<OrderedListener>();
public new void connect(OrderedListener listener) {
listeners.add(listener);
resort_list();
}
public new void disconnect(OrderedListener listener) {
listeners.remove(listener);
resort_list();
}
private bool set_contains_action(Gee.List<OrderedListener> s, string[] actions) {
foreach(OrderedListener l in s) {
if (l.action_group in actions) {
return true;
}
}
return false;
}
private void resort_list() {
ArrayList<OrderedListener> new_list = new ArrayList<OrderedListener>();
ArrayList<OrderedListener> remaining = new ArrayList<OrderedListener>();
remaining.add_all(listeners);
while (remaining.size > 0) {
bool changed = false;
Gee.Iterator<OrderedListener> iter = remaining.iterator();
while (iter.has_next()) {
iter.next();
OrderedListener l = iter.get();
if (!set_contains_action(remaining, l.after_actions)) {
new_list.add(l);
iter.remove();
changed = true;
}
}
if (!changed) error("Can't sort listeners");
}
listeners = new_list;
}
}
}
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