notify feature

2026-09-17 16:10:25 +00:00 · 2026-08-10 22:43:06 +02:00
parent 43f2e96720
commit 70efc66696
7 changed files with 123 additions and 3 deletions
@@ -39,8 +39,19 @@ class Config:

        self.healthcheck_ping_url = os.environ.get("HEALTHCHECK_PING_URL", "")

+        self.smtp_host = os.environ.get("SMTP_HOST", "")
+        self.smtp_port = int(os.environ.get("SMTP_PORT", "587"))
+        self.smtp_user = os.environ.get("SMTP_USER", "")
+        self.smtp_password = os.environ.get("SMTP_PASSWORD", "")
+        self.notify_email_to = os.environ.get("NOTIFY_EMAIL_TO", "")
+        self.notify_email_from = os.environ.get("NOTIFY_EMAIL_FROM", "")
+
        self.state_path = os.environ.get("STATE_PATH", "/app/data/last-known-ip.json")

+    @property
+    def email_notification_enabled(self) -> bool:
+        return bool(self.smtp_host and self.notify_email_to and self.notify_email_from)
+
    def validate(self):
        missing = [v for v in REQUIRED_VARS if not os.environ.get(v)]
        if missing:
@@ -7,7 +7,7 @@ import threading
 from apscheduler.schedulers.background import BackgroundScheduler
 from flask import Flask

-from app import cloudflare, freedns, healthcheck, state
+from app import cloudflare, freedns, healthcheck, notify, state
 from app.config import config
 from app.fritzbox import FritzBoxError, get_external_ip

@@ -67,6 +67,7 @@ def run_cycle(trigger: str = "unknown"):
                status="success",
                message=f"IP updated to {current_ip}",
            )
+            notify.send_ip_changed_email(last_ip, current_ip)
        else:
            failed = {k: v for k, v in cf_results.items() if v != "ok"}
            log.error(
@@ -0,0 +1,77 @@
+# Copyright (c) 2026 Stefan Koelle (https://stefankoelle.de)
+# Licensed under the MIT License. See LICENSE file in project root for details.
+import logging
+import smtplib
+from email.message import EmailMessage
+
+from app.config import config
+
+log = logging.getLogger("notify")
+
+
+def send_ip_changed_email(old_ip: str | None, new_ip: str) -> bool:
+    if not config.email_notification_enabled:
+        log.debug("E-Mail-Notification nicht konfiguriert, überspringe.")
+        return False
+
+    if old_ip is None:
+        old_ip = "unbekannt"
+
+    subject = f"🌐 IP-Update: {old_ip} → {new_ip}"
+
+    html = f"""\
+<html>
+<body style="font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
+             background: #0f172a; color: #e2e8f0; padding: 32px; margin: 0;">
+  <div style="max-width: 480px; margin: 0 auto;">
+    <div style="text-align: center; font-size: 48px; margin-bottom: 16px;">🔄</div>
+    <h1 style="font-size: 20px; color: #38bdf8; text-align: center; margin-bottom: 24px;">
+      IP-Adresse geändert
+    </h1>
+    <div style="background: #1e293b; border-radius: 12px; padding: 24px; margin-bottom: 24px;">
+      <table style="width: 100%; border-collapse: collapse;">
+        <tr>
+          <td style="padding: 8px 0; color: #94a3b8; font-size: 14px;">📍 Alte IP</td>
+          <td style="padding: 8px 0; text-align: right; font-family: monospace; font-size: 16px; color: #f87171;">
+            {old_ip}
+          </td>
+        </tr>
+        <tr>
+          <td colspan="2" style="padding: 4px 0; text-align: center; font-size: 20px;">⬇️</td>
+        </tr>
+        <tr>
+          <td style="padding: 8px 0; color: #94a3b8; font-size: 14px;">🆕 Neue IP</td>
+          <td style="padding: 8px 0; text-align: right; font-family: monospace; font-size: 16px; color: #4ade80;">
+            {new_ip}
+          </td>
+        </tr>
+      </table>
+    </div>
+    <p style="font-size: 13px; color: #64748b; text-align: center; margin: 0;">
+      📡 DynDNS-Updater · Cloudflare + FreeDNS aktualisiert
+    </p>
+  </div>
+</body>
+</html>"""
+
+    text = f"IP-Adresse geändert: {old_ip} → {new_ip}"
+
+    msg = EmailMessage()
+    msg["Subject"] = subject
+    msg["From"] = config.notify_email_from
+    msg["To"] = config.notify_email_to
+    msg.set_content(text)
+    msg.add_alternative(html, subtype="html")
+
+    try:
+        with smtplib.SMTP(config.smtp_host, config.smtp_port) as server:
+            server.ehlo()
+            server.starttls()
+            server.ehlo()
+            server.login(config.smtp_user, config.smtp_password)
+            server.send_message(msg)
+        log.info("E-Mail gesendet: %s -> %s", subject, config.notify_email_to)
+        return True
+    except Exception as exc:
+        log.error("E-Mail-Versand fehlgeschlagen: %s", exc)
+        return False