change for the send function

Website/modules/emailservice/email.py

@@ -1,5 +1,6 @@
 from email.mime.multipart import MIMEMultipart
 from email.mime.text import MIMEText
+from email.mime.application import MIMEApplication
 import smtplib
 import time
 import os
@@ -21,12 +22,21 @@ def _build_smtp_client():
     return smtp
 
 
-def send(email: list | str, subject: str, text_body: str, html_body: str = None) -> bool:
-    """Sends the email with both Plain Text and HTML support."""
+def send(
+    email: list | str, 
+    subject: str, 
+    text_body: str, 
+    html_body: str = None, 
+    attachments: list = None
+) -> bool:
+    """Sends the email with Plain Text, HTML, and optional File Attachments support."""
     
     if isinstance(email, str):
         email = [email]
 
+    if attachments is None:
+        attachments = []
+
     TEXT_SIGNATURE = (
         "\n\n--\n"
         "Mit freundlichen Grüßen\n"
@@ -72,13 +82,26 @@ def send(email: list | str, subject: str, text_body: str, html_body: str = None)
         for i, recipient in enumerate(email):
             start_time = time.time()
 
-            msg = MIMEMultipart("alternative")
+            # Root message structure for email with attachments
+            msg = MIMEMultipart("mixed")
             msg["Subject"] = subject
             msg["From"] = "Invario Team <no-reply@invario-software.de>"
             msg["To"] = str(recipient)
 
-            msg.attach(MIMEText(text_content, "plain"))
-            msg.attach(MIMEText(html_content, "html"))
+            # Sub-container for Plain Text and HTML bodies
+            msg_body = MIMEMultipart("alternative")
+            msg_body.attach(MIMEText(text_content, "plain"))
+            msg_body.attach(MIMEText(html_content, "html"))
+            msg.attach(msg_body)
+
+            # Attach files if provided
+            for file_path in attachments:
+                if file_path and os.path.isfile(file_path):
+                    filename = os.path.basename(file_path)
+                    with open(file_path, "rb") as file:
+                        part = MIMEApplication(file.read(), Name=filename)
+                    part['Content-Disposition'] = f'attachment; filename="{filename}"'
+                    msg.attach(part)
 
             smtp.sendmail(
                 from_addr="no-reply@invario-software.de",