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//! WhatsApp Agent
//!
//! Single bot instance — handles pairing, reconnection, and message processing.
//! Onboarding subscribes to QR/connected events via WhatsAppState.
use super::WhatsAppState;
use super::handler;
use crate::brain::agent::AgentService;
use crate::config::Config;
use crate::db::ChannelMessageRepository;
use crate::services::{ServiceContext, SessionService};
use std::sync::Arc;
use tokio::sync::Mutex;
use uuid::Uuid;
use super::store::Store;
use wacore::types::events::Event;
use whatsapp_rust::TokioRuntime;
use whatsapp_rust::bot::Bot;
use whatsapp_rust_tokio_transport::TokioWebSocketTransportFactory;
use whatsapp_rust_ureq_http_client::UreqHttpClient;
/// WhatsApp agent that forwards messages to the AgentService
pub struct WhatsAppAgent {
agent_service: Arc<AgentService>,
session_service: SessionService,
shared_session_id: Arc<Mutex<Option<Uuid>>>,
whatsapp_state: Arc<WhatsAppState>,
config_rx: tokio::sync::watch::Receiver<Config>,
channel_msg_repo: ChannelMessageRepository,
}
impl WhatsAppAgent {
pub fn new(
agent_service: Arc<AgentService>,
service_context: ServiceContext,
shared_session_id: Arc<Mutex<Option<Uuid>>>,
whatsapp_state: Arc<WhatsAppState>,
config_rx: tokio::sync::watch::Receiver<Config>,
channel_msg_repo: ChannelMessageRepository,
) -> Self {
Self {
agent_service,
session_service: SessionService::new(service_context),
shared_session_id,
whatsapp_state,
config_rx,
channel_msg_repo,
}
}
/// Start as a background task. Returns JoinHandle.
/// Always starts — if no session exists, emits QR events for onboarding.
/// If already paired, reconnects and handles messages.
pub fn start(self) -> tokio::task::JoinHandle<()> {
tokio::spawn(async move {
let db_path = crate::config::opencrabs_home()
.join("whatsapp")
.join("session.db");
// Ensure parent directory exists
if let Some(parent) = db_path.parent() {
let _ = std::fs::create_dir_all(parent);
}
// `with_backend` takes the backend by value now (it wraps it
// internally); the old blanket `Backend for Arc<T>` impl is gone.
let backend = match Store::new(db_path.to_string_lossy().as_ref()).await {
Ok(store) => store,
Err(e) => {
let msg = format!(
"Failed to open session store at {}: {}",
db_path.display(),
e
);
tracing::error!("WhatsApp: {}", msg);
self.whatsapp_state.broadcast_error(&msg);
return;
}
};
let cfg = self.config_rx.borrow().clone();
tracing::info!(
"WhatsApp agent running (STT={}, TTS={})",
cfg.voice_config().stt_enabled,
cfg.voice_config().tts_enabled,
);
// Derive owner JID from first allowed phone (for proactive messaging)
let owner_jid = cfg
.channels
.whatsapp
.allowed_phones
.first()
.map(|p| format!("{}@s.whatsapp.net", p.trim_start_matches('+')));
let agent = self.agent_service.clone();
let session_svc = self.session_service.clone();
let shared_session = self.shared_session_id.clone();
let wa_state = self.whatsapp_state.clone();
let config_rx = self.config_rx.clone();
let channel_msg_repo = self.channel_msg_repo.clone();
let owner_jid_clone = owner_jid.clone();
let builder = Bot::builder();
#[cfg(crates_publish)]
let builder = builder.with_backend(std::sync::Arc::new(backend));
#[cfg(not(crates_publish))]
let builder = builder.with_backend(backend);
let bot_result = builder
.with_transport_factory(TokioWebSocketTransportFactory::new())
.with_http_client(UreqHttpClient::new())
.with_runtime(TokioRuntime)
.on_event(move |event, client| {
let agent = agent.clone();
let session_svc = session_svc.clone();
let shared_session = shared_session.clone();
let wa_state = wa_state.clone();
let owner_jid = owner_jid_clone.clone();
let config_rx = config_rx.clone();
let channel_msg_repo = channel_msg_repo.clone();
async move {
match &*event {
Event::PairingQrCode { code, .. } => {
tracing::info!(
"WhatsApp: QR code available (scan with your phone)"
);
wa_state.broadcast_qr(code);
}
Event::PairSuccess(s) => {
// The paired account's JID IS the owner (the
// person who scanned). Pin them as the
// authoritative owner so a config mismatch can
// never lock them out, and ensure they are in
// the allow list. Numbers are stored WITHOUT a
// leading '+' (matching sender_phone); the
// handler's wa_should_respond normalises both
// sides, so '+'-prefixed legacy entries still
// match.
let full = s.id.to_string();
let num = full
.split('@')
.next()
.unwrap_or(&full)
.split(':')
.next()
.unwrap_or(&full)
.trim_start_matches('+')
.to_string();
if num.is_empty() {
tracing::warn!(
"WhatsApp: pairing successful but could not extract \
owner number from JID '{full}'"
);
} else {
tracing::info!("WhatsApp: pairing successful — owner is {num}");
if let Err(e) = Config::write_key(
"channels.whatsapp",
"bot_owner",
&format!("[\"{num}\"]"),
) {
tracing::warn!(
"WhatsApp: failed to persist bot_owner: {e}"
);
}
// Append to allowed_phones if not already present.
let mut allowed: Vec<String> =
config_rx.borrow().channels.whatsapp.allowed_phones.clone();
let present =
allowed.iter().any(|a| a.trim_start_matches('+') == num);
if !present {
allowed.push(num.clone());
let json = format!(
"[{}]",
allowed
.iter()
.map(|a| format!("\"{a}\""))
.collect::<Vec<_>>()
.join(",")
);
if let Err(e) = Config::write_key(
"channels.whatsapp",
"allowed_phones",
&json,
) {
tracing::warn!(
"WhatsApp: failed to persist allowed_phones: {e}"
);
}
}
// Make the freshly-paired owner available to
// the Connected handler (which sends the
// confirmation greeting once the socket is
// ready) and to the whatsapp_send tool.
wa_state
.set_owner_jid(format!("{num}@s.whatsapp.net"))
.await;
// Flag this as a fresh pairing so the
// Connected handler knows to fire the
// one-time greeting (not suppress it as a
// routine restart).
wa_state.set_first_pair_pending();
}
}
Event::Connected(_) => {
tracing::info!("WhatsApp: connected successfully");
// Prefer the freshly-paired owner (set on
// PairSuccess) over the startup-derived one,
// which is None on a first-time pairing.
let owner = match wa_state.owner_jid().await {
Some(j) => Some(j),
None => owner_jid.clone(),
};
// Greet only on a fresh pairing (first-time or
// re-pair after reset), not on every app restart
// or reconnect. The `first_pair_pending` flag is
// set by PairSuccess and consumed here: it is
// `true` exactly once per pairing, so a plain
// restart (where no PairSuccess fires) never
// triggers the greeting. The `was_connected`
// guard still suppresses keepalive reconnects
// within the same session.
let was_connected = wa_state.is_connected().await;
wa_state.set_connected(client.clone(), owner.clone()).await;
if was_connected {
tracing::debug!(
"WhatsApp: reconnected — suppressing duplicate \
confirmation greeting"
);
} else if wa_state.take_first_pair_pending() {
// Fresh pairing: a real agent turn into the
// owner's self-chat. Spawned so the event loop
// is never blocked by a full agent turn.
if let Some(jid) = owner {
let num = jid.split('@').next().unwrap_or(&jid).to_string();
tokio::spawn(handler::send_connection_greeting(
client.clone(),
agent.clone(),
session_svc.clone(),
wa_state.clone(),
num,
));
} else {
tracing::warn!(
"WhatsApp: connected but no owner number known — \
skipping confirmation greeting"
);
}
} else {
tracing::debug!(
"WhatsApp: connected (app restart) — no fresh pair, \
staying silent"
);
}
}
Event::Message(msg, info) => {
tracing::debug!("WhatsApp: Event::Message received");
// Spawned onto its own task: the agent turn is a
// very large async state machine, and polling it
// inline inside the event-loop future overflows
// the worker stack (and would block the loop).
tokio::spawn(handler::handle_message(
(**msg).clone(),
(**info).clone(),
client,
agent,
session_svc,
shared_session,
wa_state.clone(),
config_rx,
channel_msg_repo,
));
}
Event::LoggedOut(_) => {
tracing::warn!("WhatsApp: logged out");
}
Event::Disconnected(_) => {
tracing::warn!("WhatsApp: disconnected");
}
Event::Receipt(receipt) => {
// A message we sent was accepted/delivered.
// `Delivered` is the normal recipient receipt;
// `Sender` is what a self-chat send gets back —
// the bot is paired AS the owner, so its replies
// go to the owner's own devices, which ack with
// `sender`, not `delivered`. Either one means the
// message landed, so surface the id for the
// onboarding connection test.
if matches!(
receipt.r#type,
wacore::types::presence::ReceiptType::Delivered
| wacore::types::presence::ReceiptType::Sender
) {
for id in &receipt.message_ids {
wa_state.broadcast_delivered(id);
}
}
}
other => {
tracing::debug!("WhatsApp: unhandled event: {:?}", other);
}
}
}
})
.build()
.await;
#[cfg(not(crates_publish))]
let bot = match bot_result {
Ok(b) => b,
Err(e) => {
let msg = format!("Failed to build WhatsApp bot: {}", e);
tracing::error!("WhatsApp: {}", msg);
self.whatsapp_state.broadcast_error(&msg);
return;
}
};
#[cfg(crates_publish)]
let mut bot = match bot_result {
Ok(b) => b,
Err(e) => {
let msg = format!("Failed to build WhatsApp bot: {}", e);
tracing::error!("WhatsApp: {}", msg);
self.whatsapp_state.broadcast_error(&msg);
return;
}
};
// `run()` drives the bot until the connection ends. The newer
// upstream API returns `()` (no Result, no separate handle —
// build/credential failures surface before this point). The live
// client is published to WhatsAppState from the Connected event
// callback, so we don't need a handle here.
#[cfg(not(crates_publish))]
bot.run().await;
#[cfg(crates_publish)]
let _ = bot.run().await;
tracing::info!("WhatsApp: bot run loop exited");
})
}
}