Fix notification System

worker/app/notifications/email_smtp.py

@@ -0,0 +1,76 @@
+"""
+Email SMTP sender (worker) – invio notifiche via aiosmtplib.
+
+Copia del sender backend: i due container sono separati.
+"""
+
+from datetime import datetime
+from email.mime.multipart import MIMEMultipart
+from email.mime.text import MIMEText
+
+import aiosmtplib
+
+DEFAULT_TIMEOUT = 15.0
+
+
+class EmailSMTPError(Exception):
+    def __init__(self, message: str, smtp_code: int | None = None):
+        super().__init__(message)
+        self.smtp_code = smtp_code
+
+
+async def send_email_notification(
+    smtp_host: str,
+    smtp_port: int,
+    smtp_user: str,
+    smtp_password: str,
+    from_email: str,
+    to_email: str,
+    subject: str,
+    body_text: str,
+    body_html: str | None = None,
+    from_name: str = "PEChub Notifiche",
+    use_tls: bool = True,
+    use_starttls: bool = False,
+    timeout: float = DEFAULT_TIMEOUT,
+) -> None:
+    """
+    Invia un'email di notifica via SMTP.
+
+    Raises:
+        EmailSMTPError: in caso di errori di autenticazione, connessione o invio
+    """
+    msg = MIMEMultipart("alternative")
+    msg["Subject"] = subject
+    msg["From"] = f"{from_name} <{from_email}>" if from_name else from_email
+    msg["To"] = to_email
+    msg["Date"] = datetime.utcnow().strftime("%a, %d %b %Y %H:%M:%S +0000")
+    msg["X-Mailer"] = "PEChub/1.0"
+
+    msg.attach(MIMEText(body_text, "plain", "utf-8"))
+    if body_html:
+        msg.attach(MIMEText(body_html, "html", "utf-8"))
+
+    try:
+        await aiosmtplib.send(
+            msg,
+            hostname=smtp_host,
+            port=smtp_port,
+            username=smtp_user,
+            password=smtp_password,
+            use_tls=use_tls,
+            start_tls=use_starttls,
+            timeout=timeout,
+        )
+    except aiosmtplib.SMTPAuthenticationError as exc:
+        raise EmailSMTPError(
+            f"Autenticazione SMTP fallita: {exc}", smtp_code=535
+        ) from exc
+    except aiosmtplib.SMTPConnectError as exc:
+        raise EmailSMTPError(
+            f"Connessione SMTP fallita a {smtp_host}:{smtp_port}: {exc}"
+        ) from exc
+    except aiosmtplib.SMTPException as exc:
+        raise EmailSMTPError(f"Errore SMTP: {exc}") from exc
+    except Exception as exc:
+        raise EmailSMTPError(f"Errore invio email: {exc}") from exc