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using Gee;
public errordomain Xmpp.IOStreamError {
READ,
WRITE,
CONNECT,
DISCONNECT,
TLS
}
public abstract class Xmpp.XmppStream {
public signal void received_node(XmppStream stream, StanzaNode node);
public signal void received_root_node(XmppStream stream, StanzaNode node);
public signal void received_features_node(XmppStream stream);
public signal void received_message_stanza(XmppStream stream, StanzaNode node);
public signal void received_presence_stanza(XmppStream stream, StanzaNode node);
public signal void received_iq_stanza(XmppStream stream, StanzaNode node);
public signal void received_nonza(XmppStream stream, StanzaNode node);
public signal void stream_negotiated(XmppStream stream);
public signal void attached_modules(XmppStream stream);
public const string NS_URI = "http://etherx.jabber.org/streams";
public Gee.List<XmppStreamFlag> flags { get; private set; default=new ArrayList<XmppStreamFlag>(); }
public Gee.List<XmppStreamModule> modules { get; private set; default=new ArrayList<XmppStreamModule>(); }
public StanzaNode? features { get; private set; default = new StanzaNode.build("features", NS_URI); }
public Jid remote_name;
public XmppLog log = new XmppLog();
public bool negotiation_complete { get; set; default=false; }
protected bool non_negotiation_modules_attached = false;
protected bool setup_needed = false;
protected bool disconnected = false;
protected XmppStream(Jid remote_name) {
this.remote_name = remote_name;
}
public abstract async void connect() throws IOStreamError;
public abstract async void disconnect() throws IOStreamError, XmlError, IOError;
public abstract async StanzaNode read() throws IOStreamError;
[Version (deprecated = true, deprecated_since = "0.1", replacement = "write_async")]
public abstract void write(StanzaNode node);
public abstract async void write_async(StanzaNode node) throws IOStreamError;
public abstract async void setup() throws IOStreamError;
public void require_setup() {
setup_needed = true;
}
public bool is_setup_needed() {
return setup_needed;
}
public void add_flag(XmppStreamFlag flag) {
flags.add(flag);
}
public bool has_flag<T>(FlagIdentity<T>? identity) {
return get_flag(identity) != null;
}
public T? get_flag<T>(FlagIdentity<T>? identity) {
if (identity == null) return null;
foreach (var flag in flags) {
if (((!)identity).matches(flag)) return ((!)identity).cast(flag);
}
return null;
}
public void remove_flag(XmppStreamFlag flag) {
flags.remove(flag);
}
public XmppStream add_module(XmppStreamModule module) {
foreach (XmppStreamModule m in modules) {
if (m.get_ns() == module.get_ns() && m.get_id() == module.get_id()) {
warning("[%p] Adding already added module: %s\n", this, module.get_id());
return this;
}
}
modules.add(module);
if (negotiation_complete) module.attach(this);
return this;
}
public void detach_modules() {
foreach (XmppStreamModule module in modules) {
module.detach(this);
}
}
public T? get_module<T>(ModuleIdentity<T>? identity) {
if (identity == null) return null;
foreach (var module in modules) {
if (((!)identity).matches(module)) return ((!)identity).cast(module);
}
return null;
}
public async void loop() throws IOStreamError {
while (true) {
if (setup_needed) {
yield setup();
}
StanzaNode node = yield read();
Idle.add(loop.callback);
yield;
if (disconnected) break;
yield handle_stanza(node);
if (!non_negotiation_modules_attached && negotiation_modules_done()) {
attach_non_negotation_modules();
non_negotiation_modules_attached = true;
if (!negotiation_complete) {
stream_negotiated(this);
negotiation_complete = true;
}
}
}
}
private async void handle_stanza(StanzaNode node) {
received_node(this, node);
if (node.ns_uri == NS_URI && node.name == "features") {
features = node;
received_features_node(this);
} else if (node.ns_uri == NS_URI && node.name == "stream" && node.pseudo) {
debug("[%p] Server closed stream", this);
try {
yield disconnect();
} catch (Error e) {}
return;
} else if (node.ns_uri == JABBER_URI) {
if (node.name == "message") {
received_message_stanza(this, node);
} else if (node.name == "presence") {
received_presence_stanza(this, node);
} else if (node.name == "iq") {
received_iq_stanza(this, node);
} else {
received_nonza(this, node);
}
} else {
received_nonza(this, node);
}
}
public bool is_negotiation_active() {
foreach (XmppStreamModule module in modules) {
if (module is XmppStreamNegotiationModule) {
XmppStreamNegotiationModule negotiation_module = (XmppStreamNegotiationModule) module;
if (negotiation_module.negotiation_active(this)) return true;
}
}
return false;
}
private bool negotiation_modules_done() throws IOStreamError {
if (setup_needed) return false;
if (is_negotiation_active()) return false;
foreach (XmppStreamModule module in modules) {
if (module is XmppStreamNegotiationModule) {
XmppStreamNegotiationModule negotiation_module = (XmppStreamNegotiationModule) module;
if (negotiation_module.mandatory_outstanding(this)) {
throw new IOStreamError.CONNECT("mandatory-to-negotiate feature not negotiated: " + negotiation_module.get_id());
}
}
}
return true;
}
private void attach_non_negotation_modules() {
foreach (XmppStreamModule module in modules) {
if (module as XmppStreamNegotiationModule == null) {
module.attach(this);
}
}
attached_modules(this);
}
public void attach_negotation_modules() {
foreach (XmppStreamModule module in modules) {
if (module as XmppStreamNegotiationModule != null) {
module.attach(this);
}
}
}
}
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