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Add MUJI (XEP-0272) implementation to xmpp-vala

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fiaxh 2021-11-04 17:10:10 +01:00
parent 8339d95621
commit 37c543b6e7
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xmpp-vala/src/module/xep/0272_muji.vala Normal file
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using Gee;
namespace Xmpp.Xep.Muji {
public const string NS_URI = "http://telepathy.freedesktop.org/muji";
public class Module : XmppStreamModule {
public static ModuleIdentity<Module> IDENTITY = new ModuleIdentity<Module>(NS_URI, "0272_muji");
public async GroupCall? join_call(XmppStream stream, Jid muc_jid, bool video) {
StanzaNode initial_muji_node = new StanzaNode.build("muji", NS_URI).add_self_xmlns()
.put_node(new StanzaNode.build("preparing", NS_URI));
var group_call = new GroupCall(muc_jid);
stream.get_flag(Flag.IDENTITY).calls[muc_jid] = group_call;
group_call.our_nick = "%08x".printf(Random.next_int());
debug(@"[%s] MUJI joining as %s", stream.get_flag(Bind.Flag.IDENTITY).my_jid.to_string(), group_call.our_nick);
Xep.Muc.JoinResult? result = yield stream.get_module(Muc.Module.IDENTITY).enter(stream, muc_jid, group_call.our_nick, null, null, initial_muji_node);
if (result == null || result.nick == null) return null;
debug(@"[%s] MUJI joining as %s done", stream.get_flag(Bind.Flag.IDENTITY).my_jid.to_string(), group_call.our_nick);
Gee.List<Presence.Stanza> other_presences = yield wait_for_preparing_peers(stream, muc_jid);
var other_resources = new ArrayList<Jid>();
foreach (Presence.Stanza presence in other_presences) {
if (presence.stanza.get_deep_subnode(NS_URI + ":muji", NS_URI + ":preparing") != null) continue;
Jid? real_jid = stream.get_flag(Muc.Flag.IDENTITY).get_real_jid(presence.from);
if (real_jid == null) {
warning("Don't know the real jid for %s", presence.from.to_string());
continue;
}
other_resources.add(real_jid);
}
group_call.peers_to_connect_to.add_all(other_resources);
StanzaNode muji_node = new StanzaNode.build("muji", NS_URI).add_self_xmlns();
foreach (string media in video ? new string[] { "audio", "video" } : new string[] { "audio" }) {
StanzaNode content_node = new StanzaNode.build("content", Xep.Jingle.NS_URI).add_self_xmlns()
.put_attribute("name", media);
StanzaNode description_node = new StanzaNode.build("description", Xep.JingleRtp.NS_URI).add_self_xmlns()
.put_attribute("media", media);
content_node.put_node(description_node);
Gee.List<Xep.JingleRtp.PayloadType> payload_types = null;
if (other_presences.is_empty) {
payload_types = yield stream.get_module(Xep.JingleRtp.Module.IDENTITY).get_supported_payloads(media);
} else {
yield compute_payload_intersection(stream, group_call, media);
payload_types = group_call.current_payload_intersection[media];
}
foreach (Xep.JingleRtp.PayloadType payload_type in payload_types) {
description_node.put_node(payload_type.to_xml().add_self_xmlns());
}
muji_node.put_node(content_node);
}
Presence.Stanza presence_stanza = new Presence.Stanza() { to=muc_jid.with_resource(group_call.our_nick) };
presence_stanza.stanza.put_node(muji_node);
stream.get_module(Presence.Module.IDENTITY).send_presence(stream, presence_stanza);
return group_call;
}
private async Gee.List<Presence.Stanza> wait_for_preparing_peers(XmppStream stream, Jid muc_jid) {
var promise = new Promise<Gee.List<Presence.Stanza>>();
ArrayList<Jid> preparing_peers = new ArrayList<Jid>();
Gee.List<Presence.Stanza> presences = get_other_presences(stream, muc_jid);
foreach (Presence.Stanza presence in presences) {
StanzaNode? preparing_node = presence.stanza.get_deep_subnode(NS_URI + "muji", NS_URI + ":preparing");
if (preparing_node != null) {
preparing_peers.add(presence.from);
}
}
debug("[%s] MUJI waiting for %i/%i peers", stream.get_flag(Bind.Flag.IDENTITY).my_jid.to_string(), preparing_peers.size, presences.size);
if (preparing_peers.is_empty) {
return presences;
}
GroupCall group_call = stream.get_flag(Flag.IDENTITY).calls[muc_jid];
group_call.waiting_for_finish_prepares[promise] = preparing_peers;
return yield promise.future.wait_async();
}
private async void compute_payload_intersection(XmppStream stream, GroupCall group_call, string media) {
Gee.List<Presence.Stanza> presences = get_other_presences(stream, group_call.muc_jid);
if (presences.is_empty) return;
Gee.List<Xep.JingleRtp.PayloadType> intersection = parse_payload_types(stream, media, presences[0]);
var remove_payloads = new ArrayList<Xep.JingleRtp.PayloadType>();
// Check if all peers support the payloads
foreach (Presence.Stanza presence in presences) {
Gee.List<Xep.JingleRtp.PayloadType> peer_payload_types = parse_payload_types(stream, media, presence);
foreach (Xep.JingleRtp.PayloadType payload_type in intersection) {
if (!peer_payload_types.contains(payload_type)) {
remove_payloads.add(payload_type);
}
}
}
// Check if we support the payloads
foreach (Xep.JingleRtp.PayloadType payload_type in intersection) {
if (!yield stream.get_module(Xep.JingleRtp.Module.IDENTITY).is_payload_supported(media, payload_type)) {
remove_payloads.add(payload_type);
}
}
// Remove payloads not supported by everyone
foreach (Xep.JingleRtp.PayloadType payload_type in remove_payloads) {
intersection.remove(payload_type);
}
// Check if the payload intersection changed (if so: notify)
bool changed = !group_call.current_payload_intersection.has_key(media) ||
!group_call.current_payload_intersection[media].contains_all(intersection) ||
!intersection.contains_all(group_call.current_payload_intersection[media]);
if (changed) {
group_call.current_payload_intersection[media] = intersection;
group_call.codecs_changed(intersection);
}
}
private Gee.List<Xep.JingleRtp.PayloadType> parse_payload_types(XmppStream stream, string media, Presence.Stanza presence) {
Gee.List<Xep.JingleRtp.PayloadType> ret = new ArrayList<Xep.JingleRtp.PayloadType>(Xep.JingleRtp.PayloadType.equals_func);
foreach (StanzaNode content_node in presence.stanza.get_deep_subnodes(NS_URI + ":muji", Xep.Jingle.NS_URI + ":content")) {
StanzaNode? description_node = content_node.get_subnode("description", Xep.JingleRtp.NS_URI);
if (description_node == null) continue;
if (description_node.get_attribute("media") == media) {
Gee.List<StanzaNode> payload_nodes = description_node.get_subnodes("payload-type", Xep.JingleRtp.NS_URI);
foreach (StanzaNode payload_node in payload_nodes) {
Xep.JingleRtp.PayloadType payload_type = Xep.JingleRtp.PayloadType.parse(payload_node);
ret.add(payload_type);
}
}
}
return ret;
}
private void on_received_available(XmppStream stream, Presence.Stanza presence) {
StanzaNode? muji_node = presence.stanza.get_subnode("muji", NS_URI);
if (muji_node == null) return;
var flag = stream.get_flag(Flag.IDENTITY);
GroupCall? group_call = flag.calls.get(presence.from.bare_jid);
if (group_call == null) return;
if (presence.from.resourcepart == group_call.our_nick) return;
foreach (StanzaNode content_node in muji_node.get_subnodes("content", Xep.Jingle.NS_URI)) {
StanzaNode? description_node = content_node.get_subnode("description", Xep.JingleRtp.NS_URI);
if (description_node == null) continue;
string? media = description_node.get_attribute("media");
if (media == null) continue;
compute_payload_intersection.begin(stream, group_call, media);
}
StanzaNode? prepare_node = muji_node.get_subnode("preparing", NS_URI);
if (prepare_node == null) {
on_jid_finished_preparing(stream, presence.from, group_call);
if (!group_call.peers.contains(presence.from)) {
// A new peer finished preparing
Jid? real_jid = stream.get_flag(Muc.Flag.IDENTITY).get_real_jid(presence.from);
if (real_jid == null) {
warning("Don't know the real jid for %s", presence.from.to_string());
return;
}
debug("Muji peer joined %s / %s\n", real_jid.to_string(), presence.from.to_string());
group_call.peers.add(presence.from);
group_call.real_jids[presence.from] = real_jid;
group_call.peer_joined(real_jid);
}
}
}
private void on_received_unavailable(XmppStream stream, Presence.Stanza presence) {
Flag flag = stream.get_flag(Flag.IDENTITY);
GroupCall? group_call = flag.calls[presence.from.bare_jid];
if (group_call == null) return;
debug("Muji peer left %s / %s", group_call.real_jids.has_key(presence.from) ? group_call.real_jids[presence.from].to_string() : "Unknown real JID", presence.from.to_string());
on_jid_finished_preparing(stream, presence.from, group_call);
group_call.peers.remove(presence.from);
group_call.peers_to_connect_to.remove(presence.from);
if (group_call.real_jids.has_key(presence.from)) {
group_call.peer_left(group_call.real_jids[presence.from]);
}
group_call.real_jids.remove(presence.from);
}
private void on_jid_finished_preparing(XmppStream stream, Jid jid, GroupCall group_call) {
foreach (Promise<Gee.List<Presence.Stanza>> promise in group_call.waiting_for_finish_prepares.keys) {
Gee.List<Jid> outstanding_prepares = group_call.waiting_for_finish_prepares[promise];
if (outstanding_prepares.contains(jid)) {
outstanding_prepares.remove(jid);
if (outstanding_prepares.is_empty) {
Gee.List<Presence.Stanza> presences = get_other_presences(stream, jid.bare_jid);
promise.set_value(presences);
}
}
}
}
private Gee.List<Presence.Stanza> get_other_presences(XmppStream stream, Jid muc_jid) {
Gee.List<Presence.Stanza> presences = stream.get_flag(Presence.Flag.IDENTITY).get_presences(muc_jid);
string? own_nick = stream.get_flag(Flag.IDENTITY).calls[muc_jid].our_nick;
var remove_presences = new ArrayList<Presence.Stanza>();
foreach (Presence.Stanza presence in presences) {
if (presence.from.resourcepart == own_nick) {
remove_presences.add(presence);
}
StanzaNode? muji_node = presence.stanza.get_subnode("muji", NS_URI);
if (muji_node == null) {
remove_presences.add(presence);
}
}
presences.remove_all(remove_presences);
return presences;
}
public override void attach(XmppStream stream) {
stream.add_flag(new Flag());
stream.get_module(Presence.Module.IDENTITY).received_available.connect(on_received_available);
stream.get_module(Presence.Module.IDENTITY).received_unavailable.connect(on_received_unavailable);
}
public override void detach(XmppStream stream) { }
public override string get_ns() {
return NS_URI;
}
public override string get_id() {
return IDENTITY.id;
}
}
public class GroupCall {
public string our_nick;
public Jid muc_jid;
public ArrayList<Jid> peers_to_connect_to = new ArrayList<Jid>();
public ArrayList<Jid> peers = new ArrayList<Jid>(Jid.equals_func);
public HashMap<Jid, Jid> real_jids = new HashMap<Jid, Jid>(Jid.hash_func, Jid.equals_func);
public HashMap<Promise, Gee.List<Jid>> waiting_for_finish_prepares = new HashMap<Promise, Gee.List<Jid>>();
public HashMap<string, Gee.List<Xep.JingleRtp.PayloadType>> current_payload_intersection = new HashMap<string, Gee.List<Xep.JingleRtp.PayloadType>>();
public signal void peer_joined(Jid real_jid);
public signal void peer_left(Jid real_jid);
public signal void codecs_changed(Gee.List<Xep.JingleRtp.PayloadType> payload_types);
public GroupCall(Jid muc_jid) {
this.muc_jid = muc_jid;
}
public void leave(XmppStream stream) {
stream.get_module(Xep.Muc.Module.IDENTITY).exit(stream, muc_jid);
stream.get_flag(Flag.IDENTITY).calls.unset(muc_jid);
}
}
public class Flag : XmppStreamFlag {
public static FlagIdentity<Flag> IDENTITY = new FlagIdentity<Flag>(NS_URI, "muji");
public HashMap<Jid, GroupCall> calls = new HashMap<Jid, GroupCall>(Jid.hash_bare_func, Jid.equals_bare_func);
public override string get_ns() { return NS_URI; }
public override string get_id() { return IDENTITY.id; }
}
}