Owner notification webhook: Telegram re-point (#23)

Flask fires a fire-and-forget internal webhook (owner_notify.py, mirroring
mailer.py's background-thread queue) on booking create/cancel/reschedule,
carrying the same {booking, business_name, notify_channel} shape the old
EA-driven "Build booking row" node produced, plus an event field so the
Telegram message can say what actually happened. n8n/booking-sync.json gets
a new webhook + IF node feeding the existing Telegram node directly, so it
no longer needs EA's API to build the notification payload; channel routing
(only telegram sends for now) lives in that IF node.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

backoffice/app/tests/test_owner_notify.py

@@ -0,0 +1,88 @@
+"""Unit tests for owner_notify.py's webhook-call shape (#23). Calls
+_send_now directly rather than going through the background-thread queue,
+so assertions are synchronous -- the queue itself is just plumbing.
+"""
+from datetime import datetime, timezone
+
+import pytest
+
+import owner_notify
+
+
+class _FakeResponse:
+    def __enter__(self):
+        return self
+
+    def __exit__(self, *exc):
+        return False
+
+
+def _booking():
+    return {
+        "booking_id": "BK-1",
+        "client_id": "C-1",
+        "customer_name": "Alice",
+        "customer_contact": "alice@example.com",
+        "service": "Haircut",
+        "start_time": datetime(2026, 8, 10, 9, 0, tzinfo=timezone.utc),
+        "end_time": datetime(2026, 8, 10, 10, 0, tzinfo=timezone.utc),
+        "source": "public",
+        "status": "confirmed",
+    }
+
+
+def test_send_now_skips_when_webhook_url_not_configured(monkeypatch):
+    monkeypatch.setattr(owner_notify, "NOTIFY_WEBHOOK_URL", "")
+    calls = []
+    monkeypatch.setattr(owner_notify.urllib.request, "urlopen",
+                         lambda *a, **kw: calls.append((a, kw)) or _FakeResponse())
+    owner_notify._send_now({"booking": _booking(), "business_name": "Happy Nails",
+                             "notify_channel": "telegram"})
+    assert calls == []
+
+
+def test_send_now_posts_json_when_configured(monkeypatch):
+    monkeypatch.setattr(owner_notify, "NOTIFY_WEBHOOK_URL", "https://n8n.example.com/webhook/owner-notify")
+    captured = []
+
+    def fake_urlopen(req, timeout=None):
+        captured.append(req)
+        return _FakeResponse()
+
+    monkeypatch.setattr(owner_notify.urllib.request, "urlopen", fake_urlopen)
+    payload = {"booking": owner_notify._serialize_booking(_booking()),
+               "business_name": "Happy Nails", "notify_channel": "telegram"}
+    owner_notify._send_now(payload)
+    assert len(captured) == 1
+    req = captured[0]
+    assert req.full_url == "https://n8n.example.com/webhook/owner-notify"
+    assert req.get_header("Content-type") == "application/json"
+    import json
+    body = json.loads(req.data)
+    assert body["booking"]["booking_id"] == "BK-1"
+    assert body["booking"]["start_time"] == "2026-08-10T09:00:00+00:00"
+    assert body["business_name"] == "Happy Nails"
+    assert body["notify_channel"] == "telegram"
+
+
+def test_notify_enqueues_regardless_of_channel(monkeypatch):
+    """Channel routing (only "telegram" sends anything real) lives on the
+    n8n side of this webhook, not in notify() -- an unset/other channel is
+    still queued, not silently dropped here (#23)."""
+    captured = []
+    monkeypatch.setattr(owner_notify._queue, "put", lambda p: captured.append(p))
+    client = {"business_name": "Happy Nails", "notify_channel": "email"}
+    owner_notify.notify(client, _booking(), "created")
+    assert len(captured) == 1
+    assert captured[0]["notify_channel"] == "email"
+    assert captured[0]["business_name"] == "Happy Nails"
+    assert captured[0]["event"] == "created"
+
+
+def test_notify_defaults_business_name_and_channel_when_client_missing(monkeypatch):
+    captured = []
+    monkeypatch.setattr(owner_notify._queue, "put", lambda p: captured.append(p))
+    owner_notify.notify(None, _booking(), "cancelled")
+    assert captured[0]["business_name"] == ""
+    assert captured[0]["notify_channel"] is None
+    assert captured[0]["event"] == "cancelled"