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use super::EXIT_SENTINEL;
use super::RuntimeEvent;
use super::RuntimeState;
use super::timers;
use super::value::json_to_v8;
use super::value::normalize_output_audio;
use super::value::normalize_output_image;
use super::value::serialize_output_text;
use super::value::throw_type_error;
use super::value::v8_value_to_json;
pub(super) fn tool_callback(
scope: &mut v8::PinScope<'_, '_>,
args: v8::FunctionCallbackArguments,
mut retval: v8::ReturnValue<v8::Value>,
) {
let tool_index = match args.data().to_rust_string_lossy(scope).parse::<usize>() {
Ok(tool_index) => tool_index,
Err(_) => {
throw_type_error(scope, "invalid tool callback data");
return;
}
};
let input = if args.length() == 0 {
Ok(None)
} else {
v8_value_to_json(scope, args.get(0))
};
let input = match input {
Ok(input) => input,
Err(error_text) => {
throw_type_error(scope, &error_text);
return;
}
};
let Some(resolver) = v8::PromiseResolver::new(scope) else {
throw_type_error(scope, "failed to create tool promise");
return;
};
let promise = resolver.get_promise(scope);
let resolver = v8::Global::new(scope, resolver);
let (tool_name, tool_kind) = {
let Some(state) = scope.get_slot::<RuntimeState>() else {
throw_type_error(scope, "runtime state unavailable");
return;
};
let Some(tool) = state.enabled_tools.get(tool_index) else {
throw_type_error(scope, "tool callback data is out of range");
return;
};
(tool.tool_name.clone(), tool.kind)
};
let Some(state) = scope.get_slot_mut::<RuntimeState>() else {
throw_type_error(scope, "runtime state unavailable");
return;
};
let id = format!("tool-{}", state.next_tool_call_id);
state.next_tool_call_id = state.next_tool_call_id.saturating_add(1);
let event_tx = state.event_tx.clone();
state.pending_tool_calls.insert(id.clone(), resolver);
let _ = event_tx.send(RuntimeEvent::ToolCall {
id,
name: tool_name,
kind: tool_kind,
input,
});
retval.set(promise.into());
}
pub(super) fn text_callback(
scope: &mut v8::PinScope<'_, '_>,
args: v8::FunctionCallbackArguments,
mut retval: v8::ReturnValue<v8::Value>,
) {
let value = if args.length() == 0 {
v8::undefined(scope).into()
} else {
args.get(0)
};
let text = match serialize_output_text(scope, value) {
Ok(text) => text,
Err(error_text) => {
throw_type_error(scope, &error_text);
return;
}
};
if let Some(state) = scope.get_slot::<RuntimeState>() {
let _ = state.event_tx.send(RuntimeEvent::ContentItem(
FunctionCallOutputContentItem::InputText { text },
));
}
retval.set(v8::undefined(scope).into());
}
pub(super) fn audio_callback(
scope: &mut v8::PinScope<'_, '_>,
args: v8::FunctionCallbackArguments,
mut retval: v8::ReturnValue<v8::Value>,
) {
let value = if args.length() == 0 {
v8::undefined(scope).into()
} else {
args.get(0)
};
let audio_item = match normalize_output_audio(scope, value) {
Ok(audio_item) => audio_item,
Err(()) => return,
};
if let Some(state) = scope.get_slot::<RuntimeState>() {
let _ = state.event_tx.send(RuntimeEvent::ContentItem(audio_item));
}
retval.set(v8::undefined(scope).into());
}
pub(super) fn image_callback(
scope: &mut v8::PinScope<'_, '_>,
args: v8::FunctionCallbackArguments,
mut retval: v8::ReturnValue<v8::Value>,
) {
let value = if args.length() == 0 {
v8::undefined(scope).into()
} else {
args.get(0)
};
let detail_override = if args.length() < 2 {
None
} else {
let detail = args.get(1);
if detail.is_string() {
Some(detail.to_rust_string_lossy(scope))
} else if detail.is_null() || detail.is_undefined() {
None
} else {
throw_type_error(scope, "image detail must be a string when provided");
return;
}
};
let image_item = match normalize_output_image(scope, value, detail_override) {
Ok(image_item) => image_item,
Err(()) => return,
};
if let Some(state) = scope.get_slot::<RuntimeState>() {
let _ = state.event_tx.send(RuntimeEvent::ContentItem(image_item));
}
retval.set(v8::undefined(scope).into());
}
pub(super) fn generated_image_callback(
scope: &mut v8::PinScope<'_, '_>,
args: v8::FunctionCallbackArguments,
mut retval: v8::ReturnValue<v8::Value>,
) {
let value = if args.length() == 0 {
v8::undefined(scope).into()
} else {
args.get(0)
};
let output_hint = match generated_image_output_hint(scope, value) {
Ok(output_hint) => output_hint,
Err(error_text) => {
throw_type_error(scope, &error_text);
return;
}
};
let image_item = match normalize_output_image(scope, value, /*detail_override*/ None) {
Ok(image_item) => image_item,
Err(()) => return,
};
if let Some(state) = scope.get_slot::<RuntimeState>() {
let _ = state.event_tx.send(RuntimeEvent::ContentItem(image_item));
if let Some(text) = output_hint {
let _ = state.event_tx.send(RuntimeEvent::ContentItem(
FunctionCallOutputContentItem::InputText { text },
));
}
}
retval.set(v8::undefined(scope).into());
}
fn generated_image_output_hint(
scope: &mut v8::PinScope<'_, '_>,
value: v8::Local<'_, v8::Value>,
) -> Result<Option<String>, String> {
let object = v8::Local::<v8::Object>::try_from(value)
.map_err(|_| "generatedImage expects an image generation result object".to_string())?;
let key = v8::String::new(scope, "output_hint")
.ok_or_else(|| "failed to allocate generatedImage helper keys".to_string())?;
let output_hint = object
.get(scope, key.into())
.ok_or_else(|| "failed to read generatedImage output_hint".to_string())?;
if output_hint.is_undefined() {
return Ok(None);
}
if !output_hint.is_string() {
return Err("generatedImage output_hint must be a string when provided".to_string());
}
Ok(Some(output_hint.to_rust_string_lossy(scope)))
}
pub(super) fn store_callback(
scope: &mut v8::PinScope<'_, '_>,
args: v8::FunctionCallbackArguments,
_retval: v8::ReturnValue<v8::Value>,
) {
let key = match args.get(0).to_string(scope) {
Some(key) => key.to_rust_string_lossy(scope),
None => {
throw_type_error(scope, "store key must be a string");
return;
}
};
let value = args.get(1);
let serialized = match v8_value_to_json(scope, value) {
Ok(Some(value)) => value,
Ok(None) => {
throw_type_error(
scope,
&format!("Unable to store {key:?}. Only plain serializable objects can be stored."),
);
return;
}
Err(error_text) => {
throw_type_error(scope, &error_text);
return;
}
};
if let Some(state) = scope.get_slot_mut::<RuntimeState>() {
state.stored_values.insert(key.clone(), serialized.clone());
state.stored_value_writes.insert(key, serialized);
}
}
pub(super) fn load_callback(
scope: &mut v8::PinScope<'_, '_>,
args: v8::FunctionCallbackArguments,
mut retval: v8::ReturnValue<v8::Value>,
) {
let key = match args.get(0).to_string(scope) {
Some(key) => key.to_rust_string_lossy(scope),
None => {
throw_type_error(scope, "load key must be a string");
return;
}
};
let value = scope
.get_slot::<RuntimeState>()
.and_then(|state| state.stored_values.get(&key))
.cloned();
let Some(value) = value else {
retval.set(v8::undefined(scope).into());
return;
};
let Some(value) = json_to_v8(scope, &value) else {
throw_type_error(scope, "failed to load stored value");
return;
};
retval.set(value);
}
pub(super) fn notify_callback(
scope: &mut v8::PinScope<'_, '_>,
args: v8::FunctionCallbackArguments,
mut retval: v8::ReturnValue<v8::Value>,
) {
let value = if args.length() == 0 {
v8::undefined(scope).into()
} else {
args.get(0)
};
let text = match serialize_output_text(scope, value) {
Ok(text) => text,
Err(error_text) => {
throw_type_error(scope, &error_text);
return;
}
};
if text.trim().is_empty() {
throw_type_error(scope, "notify expects non-empty text");
return;
}
if let Some(state) = scope.get_slot::<RuntimeState>() {
let _ = state.event_tx.send(RuntimeEvent::Notify {
call_id: state.tool_call_id.clone(),
text,
});
}
retval.set(v8::undefined(scope).into());
}
pub(super) fn set_timeout_callback(
scope: &mut v8::PinScope<'_, '_>,
args: v8::FunctionCallbackArguments,
mut retval: v8::ReturnValue<v8::Value>,
) {
let timeout_id = match timers::schedule_timeout(scope, args) {
Ok(timeout_id) => timeout_id,
Err(error_text) => {
throw_type_error(scope, &error_text);
return;
}
};
retval.set(v8::Number::new(scope, timeout_id as f64).into());
}
pub(super) fn clear_timeout_callback(
scope: &mut v8::PinScope<'_, '_>,
args: v8::FunctionCallbackArguments,
mut retval: v8::ReturnValue<v8::Value>,
) {
if let Err(error_text) = timers::clear_timeout(scope, args) {
throw_type_error(scope, &error_text);
return;
}
retval.set(v8::undefined(scope).into());
}
pub(super) fn yield_control_callback(
scope: &mut v8::PinScope<'_, '_>,
_args: v8::FunctionCallbackArguments,
_retval: v8::ReturnValue<v8::Value>,
) {
if let Some(state) = scope.get_slot::<RuntimeState>() {
let _ = state.event_tx.send(RuntimeEvent::YieldRequested);
}
}
pub(super) fn exit_callback(
scope: &mut v8::PinScope<'_, '_>,
_args: v8::FunctionCallbackArguments,
_retval: v8::ReturnValue<v8::Value>,
) {
if let Some(state) = scope.get_slot_mut::<RuntimeState>() {
state.exit_requested = true;
}
if let Some(error) = v8::String::new(scope, EXIT_SENTINEL) {
scope.throw_exception(error.into());
}
}
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