55 lines
1.8 KiB
Python
55 lines
1.8 KiB
Python
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"""Outbound email (SMTP) and template rendering."""
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import os
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import smtplib
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from email.message import EmailMessage
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def render(template: str, **vars) -> str:
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"""Safe {placeholder} substitution — unknown placeholders are left as-is."""
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out = template
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for k, v in vars.items():
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out = out.replace("{" + k + "}", str(v))
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return out
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def send_mail(to_addrs, subject, body):
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"""Send a plain-text email. Returns (ok, detail)."""
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if isinstance(to_addrs, str):
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to_addrs = [to_addrs]
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to_addrs = [a for a in to_addrs if a]
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if not to_addrs:
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return False, "no recipients"
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host = os.environ.get("SMTP_HOST", "")
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port = int(os.environ.get("SMTP_PORT", "587"))
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user = os.environ.get("SMTP_USER", "")
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password = os.environ.get("SMTP_PASSWORD", "")
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sender = os.environ.get("SMTP_FROM", user or "approvalflow@localhost")
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security = os.environ.get("SMTP_SECURITY", "starttls").lower() # starttls / ssl / none
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msg = EmailMessage()
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msg["From"] = sender
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msg["To"] = ", ".join(to_addrs)
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msg["Subject"] = subject
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msg.set_content(body)
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if not host:
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# Dev mode: print instead of sending so the app is testable without SMTP.
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print(f"[mail:DEV] To: {msg['To']}\nSubject: {subject}\n{body}\n{'-'*50}")
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return True, "dev mode (SMTP_HOST not set) — printed to console"
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try:
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if security == "ssl":
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server = smtplib.SMTP_SSL(host, port, timeout=30)
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else:
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server = smtplib.SMTP(host, port, timeout=30)
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if security == "starttls":
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server.starttls()
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if user:
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server.login(user, password)
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server.send_message(msg)
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server.quit()
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return True, f"sent to {', '.join(to_addrs)}"
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except Exception as e:
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return False, f"SMTP error: {e}"
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