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// SPDX-License-Identifier: Apache-2.0
// Private session state transitions; see NOTICE-PRISM.
use super::*;
impl Worker {
pub(super) fn complete(&mut self, i: usize, e: Wire) -> Result<(), Error> {
let c = &mut self.pending[i];
if c.expected != e.kind {
return Err(failure("unexpected request acknowledgment"));
}
let mut answer = Answer::default();
if let Some(RealtimeEvent::ResponseStarted { response, .. }) = &e.payload {
c.accepted = Some(response.clone());
answer.response = Some(response.clone())
}
match c.kind {
Kind::HistoryGet => answer.history = e.history,
Kind::HistoryDelete => {
if c.target != e.target {
return Err(failure("deletion acknowledgment names another item"));
}
}
Kind::History | Kind::HistoryResult => {
let id = e
.created_id
.filter(|id| !id.is_empty())
.ok_or_else(|| failure("history acknowledgment has no item ID"))?;
if let Some(want) = c.body["item"]["id"].as_str() {
if want != id {
return Err(failure("history acknowledgment names another item"));
}
}
if c.kind == Kind::HistoryResult {
if c.target != e.target {
return Err(failure("result acknowledgment names another call"));
}
for response in self.responses.values_mut() {
if matches!(response.calls.get(&c.target), Some(None)) {
response.calls.insert(c.target.clone(), c.digest);
}
}
}
answer.item = Some(ItemRef {
session_id: self.id.clone(),
item_id: id,
});
}
Kind::Tool => {
if e.target != c.target {
return Err(failure("tool acknowledgment names another call"));
}
self.responses
.get_mut(&c.reference.as_ref().expect("reference").response_id)
.expect("tool response")
.calls
.insert(c.target.clone(), c.digest);
}
Kind::Clear => self.converter = None,
Kind::Update | Kind::Labels => {
let mut info = e.info.ok_or_else(|| failure("missing session view"))?;
info.session_id = self.id.clone();
if !e.interrupt_known {
info.interrupt_on_speech = c.body["session"]["turn_detection"]
["interrupt_response"]
.as_bool()
.unwrap_or(self.interrupt)
}
self.interrupt = info.interrupt_on_speech;
self.interrupt_policies
.record(info.settings_revision, self.interrupt);
*self.info.lock().expect("session info mutex") = Some(info.clone());
answer.info = Some(info.clone());
if let Some(tx) = self.initialized.take() {
let _ = tx.send(Ok(info));
}
}
_ => {}
}
let abandoned = if c.abandoned() {
c.accepted.take()
} else {
None
};
c.finish(Ok(answer));
if let Some(r) = abandoned {
self.abandon(r)?
}
Ok(())
}
pub(super) fn dispatch(&mut self, mut e: Wire) -> Result<(), Error> {
let mut matched = vec![];
for (i, c) in self.pending.iter_mut().enumerate() {
if c.finished || !c.submitted {
continue;
}
let mut matching = e.request_id.as_deref() == Some(&format!("evt_{}", c.id));
if c.kind == Kind::Clear && e.kind == "audio.cleared" {
matching = true
}
if c.kind == Kind::Truncate
&& e.kind == "item.truncated"
&& e.target == c.target
&& e.index == 0
{
matching = true
}
if let Some(RealtimeEvent::ResponseEnded { response, .. }) = &e.payload {
if c.kind == Kind::Cancel && response.response_id == c.target {
matching = true
}
}
if matching && e.kind != "error" {
if c.kind == Kind::Text && e.kind == "item.created" {
c.item_id = e.target.clone();
continue;
}
if c.expected != e.kind {
return Err(failure("unexpected request acknowledgment"));
}
if c.kind == Kind::Tool && c.target != e.target {
return Err(failure("tool acknowledgment names another call"));
}
matched.push(i)
}
}
// An acknowledgment can arrive before the transport confirms its write.
// Capture accepted policy before a subsequent response is dispatched.
if e.kind == "session.updated" {
if let Some(&i) = matched.first() {
let info = e
.info
.as_mut()
.ok_or_else(|| failure("missing session view"))?;
if !e.interrupt_known {
info.interrupt_on_speech = self.pending[i].body["session"]["turn_detection"]
["interrupt_response"]
.as_bool()
.unwrap_or(self.interrupt);
}
self.interrupt = info.interrupt_on_speech;
self.interrupt_policies
.record(info.settings_revision, self.interrupt);
e.interrupt_known = true;
}
}
if let Some(p) = &e.payload {
use RealtimeEvent::*;
match p {
InputReady => {
self.epoch += 1;
self.ready = true
}
SpeechStarted { .. } => {
self.epoch += 1;
self.ready = false;
self.latest.clear()
}
ResponseStarted {
response,
settings_revision,
..
} => {
let interrupt = self
.interrupt_policies
.resolve(*settings_revision, self.interrupt)?;
self.epoch += 1;
let id = &response.response_id;
if self.responses.contains_key(id) {
return Err(failure("duplicate response.created"));
}
if self.order.len() >= 128 {
let old = self.order.front().expect("response order");
if !self.responses[old].done
|| self.pending.iter().any(|c| {
!c.finished
&& (c.reference.as_ref().is_some_and(|r| &r.response_id == old)
|| c.call
.as_ref()
.is_some_and(|r| &r.response.response_id == old))
})
{
return Err(Error::new(
ErrorKind::ResourceLimit,
"too many retained active responses",
));
}
self.responses.remove(old);
self.order.pop_front();
}
self.order.push_back(id.clone());
self.response_policies
.lock()
.expect("response policy mutex")
.insert(response.clone(), interrupt);
self.responses.insert(
id.clone(),
Response {
reference: response.clone(),
done: false,
continued: false,
abandoned: false,
token: None,
calls: HashMap::new(),
outputs: HashSet::new(),
},
);
self.latest = id.clone();
self.ready = false;
}
ResponseEnded { response, .. } => {
let r = self
.responses
.get_mut(&response.response_id)
.ok_or_else(|| failure("unknown response"))?;
if r.done {
return Ok(());
}
r.done = true;
r.token = e.token.clone()
}
ToolCall { call, .. } => {
let r = self
.responses
.get(&call.response.response_id)
.ok_or_else(|| failure("unknown tool response"))?;
if r.calls.contains_key(&call.call_id) {
return Ok(());
}
if self
.responses
.values()
.any(|r| r.calls.contains_key(&call.call_id))
{
return Err(failure("tool call ID reused"));
}
let r = self
.responses
.get_mut(&call.response.response_id)
.expect("tool response");
if r.calls.len() >= 128 {
return Err(Error::new(ErrorKind::ResourceLimit, "too many tool calls"));
}
r.calls.insert(call.call_id.clone(), None);
}
MessageStarted { output } => {
let r = self
.responses
.get_mut(&output.response.response_id)
.ok_or_else(|| failure("unknown output response"))?;
if r.outputs.len() >= 128 {
return Err(Error::new(ErrorKind::ResourceLimit, "too many outputs"));
}
r.outputs.insert(output.clone());
}
TextDelta { output, .. }
| TextDone { output, .. }
| AudioDelta { output, .. }
| AudioDone { output } => {
if !self.responses.contains_key(&output.response.response_id) {
return Err(failure("unknown response"));
}
}
Fault(f) => {
if f.scope == "session" {
return Err(protocol::fault_error(f.clone()));
}
let busy = f.scope == "event"
&& [
"typed_turn_busy",
"instructions_busy",
"proactive_unavailable",
]
.contains(&f.code.as_str());
if busy {
self.ready = false
}
for c in &mut self.pending {
if c.finished {
continue;
}
if (c.submitted
&& f.request_id.as_deref() == Some(&format!("evt_{}", c.id)))
|| (f.code == "typed_turn_superseded"
&& f.item_id
.as_ref()
.is_some_and(|s| !s.is_empty() && s == &c.item_id))
{
if busy && matches!(c.kind, Kind::Text | Kind::Reply) && !c.abandoned()
{
c.id = 0;
c.frames.clear();
c.submitted = false;
c.written = false;
c.deadline = c.admission_deadline
} else {
if c.kind == Kind::Continue
&& f.code == "tool_continuation_not_ready"
{
if let Some(r) = c
.reference
.as_ref()
.and_then(|r| self.responses.get_mut(&r.response_id))
{
r.continued = false
}
}
if c.kind == Kind::Update && self.initialized.is_some() {
return Err(protocol::fault_error(f.clone()));
}
c.finish(Err(protocol::fault_error(f.clone())))
}
}
}
}
_ => {}
}
self.publish(p.clone(), e.event_id.clone(), e.request_id.clone())?
}
// Only uncorrelated controls can match several waiters; they are serialized.
if let Some(&i) = matched.first() {
if self.pending[i].written {
self.complete(i, e)?
} else {
if let Some(RealtimeEvent::ResponseStarted { response, .. }) = &e.payload {
self.pending[i].accepted = Some(response.clone())
}
self.pending[i].ack = Some(e)
}
}
Ok(())
}
}