mivanchenko
644c99ee30
Sends a confirmation email (best-effort, fire-and-forget SMTP via mailer.py) on booking creation, with a manage-booking link embedding the ticket-2 signed token. Adds /manage/<token>, a stateless cancel/reschedule page that reuses the existing slot-picker against booking_api's create/cancel/reschedule API, distinguishing an invalid/expired link from an already-cancelled one. Sender address uses the client's own domain when configured, falling back to a mivanchenko.de address otherwise. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
60 lines
1.9 KiB
Python
60 lines
1.9 KiB
Python
"""Best-effort SMTP email sending (#18).
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Mirrors app.py's DB -> Sheets mirror pattern: a single background worker
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thread drains a queue, and a send failure is logged, never raised back to the
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caller -- booking creation must succeed even if the mail relay is down.
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"""
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import os
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import queue
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import smtplib
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import threading
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import traceback
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from email.message import EmailMessage
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SMTP_HOST = os.environ.get("SMTP_HOST", "")
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SMTP_PORT = int(os.environ.get("SMTP_PORT", "587"))
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SMTP_USERNAME = os.environ.get("SMTP_USERNAME", "")
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SMTP_PASSWORD = os.environ.get("SMTP_PASSWORD", "")
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# Used when a client has no domain configured -- see booking_mail.py.
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MAIL_FALLBACK_FROM = os.environ.get("MAIL_FALLBACK_FROM", "noreply@mivanchenko.de")
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_queue = queue.Queue()
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def _send_now(msg):
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if not SMTP_HOST:
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print(f"[mailer] SMTP_HOST not configured, skipping send to {msg['To']}", flush=True)
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return
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with smtplib.SMTP(SMTP_HOST, SMTP_PORT, timeout=10) as smtp:
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smtp.starttls()
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if SMTP_USERNAME:
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smtp.login(SMTP_USERNAME, SMTP_PASSWORD)
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smtp.send_message(msg)
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def _worker():
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while True:
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msg = _queue.get()
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try:
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_send_now(msg)
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except Exception: # noqa: BLE001
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print(f"[mailer] send to {msg['To']} failed:", flush=True)
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traceback.print_exc()
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finally:
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_queue.task_done()
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threading.Thread(target=_worker, daemon=True).start()
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def send_email(to_addr, subject, html_body, from_addr=None):
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"""Queue an HTML email for best-effort async delivery. Never raises and
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never blocks the caller on the network -- the actual SMTP conversation
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happens on the background worker thread."""
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msg = EmailMessage()
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msg["Subject"] = subject
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msg["From"] = from_addr or MAIL_FALLBACK_FROM
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msg["To"] = to_addr
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msg.set_content(html_body, subtype="html")
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_queue.put(msg)
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