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//! Handler context — what tool / hook handlers see at call time.
use std::sync::Arc;
use nexo_tool_meta::{BindingContext, InboundMessageMeta};
use uuid::Uuid;
#[cfg(feature = "outbound")]
use crate::outbound::OutboundDispatcher;
/// Context passed to every [`crate::ToolHandler`] call.
///
/// Carries the `(agent_id, session_id, binding, inbound)` tuple
/// parsed from the inbound JSON-RPC `_meta` block plus optional
/// helpers gated behind cargo features (`outbound`).
#[derive(Debug, Clone)]
pub struct ToolCtx {
/// Stable agent identifier (`agents.yaml.<id>`).
pub agent_id: String,
/// Active session UUID. `None` for delegation receive,
/// heartbeat bootstrap, tests.
pub session_id: Option<Uuid>,
/// Inbound binding when matched. `None` for paths without a
/// binding match.
pub binding: Option<BindingContext>,
/// Per-turn inbound message metadata (sender id, msg id,
/// timestamp, …) when the producer populated it. `None` for
/// legacy producers and for tests that don't inject one.
pub inbound: Option<InboundMessageMeta>,
/// Outbound dispatcher — only available with the `outbound`
/// feature on. Compile-time gate (no runtime
/// `FeatureDisabled` error path).
#[cfg(feature = "outbound")]
pub(crate) outbound: Arc<OutboundDispatcher>,
// Hold even when feature off so future fields can be added
// semver-minor; the field is private and unused.
#[cfg(not(feature = "outbound"))]
#[allow(dead_code)]
pub(crate) _outbound_marker: std::marker::PhantomData<Arc<()>>,
/// Admin RPC client — `Some` when the microapp builder opts
/// in via [`crate::Microapp::with_admin`]. Tools call admin
/// RPC through `ctx.admin()`. Only present with the `admin`
/// cargo feature.
#[cfg(feature = "admin")]
pub(crate) admin: Option<Arc<crate::admin::AdminClient>>,
}
impl ToolCtx {
/// Borrow the parsed [`BindingContext`] when the inbound
/// matched a binding. Returns `None` for delegation receive,
/// heartbeat bootstrap, tests.
pub fn binding(&self) -> Option<&BindingContext> {
self.binding.as_ref()
}
/// Borrow the parsed [`InboundMessageMeta`] when the producer
/// populated it. Returns `None` for legacy producers that
/// don't populate it and for tests that didn't inject one.
pub fn inbound(&self) -> Option<&InboundMessageMeta> {
self.inbound.as_ref()
}
/// Borrow the outbound dispatcher.
///
/// Only available with the `outbound` cargo feature on. Calling
/// without the feature is a compile error.
#[cfg(feature = "outbound")]
pub fn outbound(&self) -> &OutboundDispatcher {
&self.outbound
}
/// Borrow the admin RPC client when one was wired via
/// [`crate::Microapp::with_admin`]. Returns `None` if the
/// microapp did not opt in. Only available with the `admin`
/// cargo feature on.
#[cfg(feature = "admin")]
pub fn admin(&self) -> Option<&crate::admin::AdminClient> {
self.admin.as_deref()
}
}
/// Context passed to every [`crate::HookHandler`] call.
#[derive(Debug, Clone)]
pub struct HookCtx {
/// Stable agent identifier.
pub agent_id: String,
/// Inbound binding when matched. `None` for paths without a
/// binding match.
pub binding: Option<BindingContext>,
/// Per-turn inbound message metadata when populated by the
/// producer. Hooks (e.g. `before_message`) read this for
/// anti-loop / sender-aware decisions before tool dispatch.
pub inbound: Option<InboundMessageMeta>,
/// Admin RPC client — `Some` when the microapp builder opts
/// in via [`crate::Microapp::with_admin`]. Hooks call admin
/// RPC through `ctx.admin()`. Only present with the `admin`
/// cargo feature.
#[cfg(feature = "admin")]
pub(crate) admin: Option<Arc<crate::admin::AdminClient>>,
}
impl HookCtx {
/// Borrow the parsed [`InboundMessageMeta`] when the producer
/// populated it.
pub fn inbound(&self) -> Option<&InboundMessageMeta> {
self.inbound.as_ref()
}
/// Borrow the admin RPC client when one was wired via
/// [`crate::Microapp::with_admin`]. Returns `None` if the
/// microapp did not opt in. Only available with the `admin`
/// cargo feature on.
#[cfg(feature = "admin")]
pub fn admin(&self) -> Option<&crate::admin::AdminClient> {
self.admin.as_deref()
}
}
#[cfg(test)]
mod tests {
use super::*;
use nexo_tool_meta::BindingContext;
fn ctx_with_binding(b: Option<BindingContext>) -> ToolCtx {
ToolCtx {
agent_id: "ana".into(),
session_id: None,
binding: b,
inbound: None,
#[cfg(not(feature = "outbound"))]
_outbound_marker: std::marker::PhantomData,
#[cfg(feature = "outbound")]
outbound: Arc::new(OutboundDispatcher::new_stub()),
#[cfg(feature = "admin")]
admin: None,
}
}
#[test]
fn binding_accessor_returns_some_when_present() {
let b = BindingContext::agent_only("ana");
let ctx = ctx_with_binding(Some(b.clone()));
assert_eq!(ctx.binding(), Some(&b));
}
#[test]
fn binding_accessor_returns_none_when_absent() {
let ctx = ctx_with_binding(None);
assert!(ctx.binding().is_none());
}
#[test]
fn inbound_accessor_returns_none_when_absent() {
let ctx = ctx_with_binding(None);
assert!(ctx.inbound().is_none());
}
#[test]
fn inbound_accessor_returns_some_when_present() {
let inbound = nexo_tool_meta::InboundMessageMeta::external_user("+5491100", "wa.X");
let mut ctx = ctx_with_binding(None);
ctx.inbound = Some(inbound.clone());
assert_eq!(ctx.inbound(), Some(&inbound));
}
#[test]
fn hook_ctx_round_trip() {
let b = BindingContext::agent_only("ana");
let h = HookCtx {
agent_id: "ana".into(),
binding: Some(b.clone()),
inbound: None,
#[cfg(feature = "admin")]
admin: None,
};
assert_eq!(h.binding, Some(b));
assert!(h.inbound().is_none());
}
}