Добавлена опция сохранения копии отправленных писем в IMAP Sent

- Добавлены поля IMAP в модель SmtpSettings и миграция колонок
- Реализовано сохранение копии MIME-сообщения через imaplib после SMTP/EWS/Outlook отправки
- Обновлен routes.py: чтение и сохранение IMAP-настроек из формы
- Обновлен шаблон admin/email_settings.html: блок настроек IMAP с подсказками

app/services/email_service.py

@@ -1,4 +1,5 @@
 import smtplib
+import time
 from email.mime.multipart import MIMEMultipart
 from email.mime.text import MIMEText
 from email.mime.image import MIMEImage
@@ -13,26 +14,16 @@ from app.utils.paths import event_qr_folder
 OUTLOOK_CONTENT_ID_PROP = "http://schemas.microsoft.com/mapi/proptag/0x3712001F"
 
 
-def _send_smtp_email(to_address, subject, html_body, sender_name, attachments):
-    """Отправляет письмо через SMTP с inline-вложениями."""
+def _build_mime_message(to_address, subject, html_body, sender_name, attachments):
+    """Собирает MIME-сообщение с inline-вложениями."""
     config = current_app.config
-
-    server = config.get("MAIL_SERVER", "")
-    port = config.get("MAIL_PORT", 465)
-    username = config.get("MAIL_USERNAME", "")
-    password = config.get("MAIL_PASSWORD", "")
-    use_ssl = config.get("MAIL_USE_SSL", True)
-    sender = config.get("MAIL_DEFAULT_SENDER") or username
-
-    if not username or not password:
-        raise ValueError("MAIL_USERNAME и MAIL_PASSWORD должны быть указаны в конфигурации")
-    if not server or not port:
-        raise ValueError("MAIL_SERVER и MAIL_PORT должны быть указаны в конфигурации")
+    sender = config.get("MAIL_DEFAULT_SENDER") or config.get("MAIL_USERNAME", "")
 
     msg = MIMEMultipart("related")
     msg["Subject"] = subject
     msg["From"] = formataddr((sender_name, sender))
     msg["To"] = to_address
+    msg["Date"] = email.utils.formatdate(localtime=True)
     msg.attach(MIMEText(html_body, "html", "utf-8"))
 
     for att in attachments:
@@ -46,6 +37,26 @@ def _send_smtp_email(to_address, subject, html_body, sender_name, attachments):
             img.add_header("Content-Disposition", "inline", filename=filename)
             msg.attach(img)
 
+    return msg
+
+
+def _send_smtp_email(to_address, subject, html_body, sender_name, attachments):
+    """Отправляет письмо через SMTP с inline-вложениями."""
+    config = current_app.config
+
+    server = config.get("MAIL_SERVER", "")
+    port = config.get("MAIL_PORT", 465)
+    username = config.get("MAIL_USERNAME", "")
+    password = config.get("MAIL_PASSWORD", "")
+    use_ssl = config.get("MAIL_USE_SSL", True)
+
+    if not username or not password:
+        raise ValueError("MAIL_USERNAME и MAIL_PASSWORD должны быть указаны в конфигурации")
+    if not server or not port:
+        raise ValueError("MAIL_SERVER и MAIL_PORT должны быть указаны в конфигурации")
+
+    msg = _build_mime_message(to_address, subject, html_body, sender_name, attachments)
+
     if use_ssl:
         with smtplib.SMTP_SSL(server, port) as smtp:
             smtp.login(username, password)
@@ -56,6 +67,8 @@ def _send_smtp_email(to_address, subject, html_body, sender_name, attachments):
             smtp.login(username, password)
             smtp.send_message(msg)
 
+    return msg
+
 
 def _send_outlook_email(to_address, subject, html_body, sender_name, attachments):
     """Отправляет письмо через локальный Outlook (MAPI/COM)."""
@@ -132,6 +145,49 @@ def _send_ews_email(to_address, subject, html_body, sender_name, attachments):
         raise RuntimeError(f"Ошибка отправки через EWS: {e}") from e
 
 
+def _save_imap_copy(to_address, subject, html_body, sender_name, attachments):
+    """Сохраняет копию отправленного письма в IMAP-папку (обычно Sent)."""
+    import imaplib
+
+    config = current_app.config
+    if not config.get("IMAP_SAVE_COPY"):
+        return
+
+    server = config.get("IMAP_SERVER", "")
+    port = config.get("IMAP_PORT", 993)
+    username = config.get("IMAP_USERNAME", "")
+    password = config.get("IMAP_PASSWORD", "")
+    folder = config.get("IMAP_FOLDER", "Sent")
+    use_ssl = config.get("IMAP_USE_SSL", True)
+
+    if not server or not username or not password:
+        raise ValueError("Для сохранения копии в IMAP должны быть указаны сервер, логин и пароль")
+
+    msg = _build_mime_message(to_address, subject, html_body, sender_name, attachments)
+    msg_bytes = msg.as_bytes()
+    date_str = imaplib.Time2Internaldate(time.time())
+
+    try:
+        if use_ssl:
+            mail = imaplib.IMAP4_SSL(server, port)
+        else:
+            mail = imaplib.IMAP4(server, port)
+            try:
+                mail.starttls()
+            except Exception:
+                pass
+
+        mail.login(username, password)
+        mail.select(folder)
+        result, data = mail.append(folder, "", date_str, msg_bytes)
+        if result != "OK":
+            raise RuntimeError(f"IMAP append failed: {data}")
+        mail.close()
+        mail.logout()
+    except Exception as e:
+        raise RuntimeError(f"Ошибка сохранения копии в IMAP: {e}") from e
+
+
 def _send_email(to_address, subject, html_body, sender_name="InviteMe", attachments=None):
     """Маршрутизирует отправку через SMTP, EWS или локальный Outlook."""
     attachments = attachments or []
@@ -142,6 +198,10 @@ def _send_email(to_address, subject, html_body, sender_name="InviteMe", attachme
     else:
         _send_smtp_email(to_address, subject, html_body, sender_name, attachments)
 
+    # Сохраняем копию в IMAP, если включено
+    if current_app.config.get("IMAP_SAVE_COPY"):
+        _save_imap_copy(to_address, subject, html_body, sender_name, attachments)
+
 
 def send_invitation(guest, event_name=None, additional_text=""):
     """Отправляет приглашение гостю на email с QR-кодом и билетом во вложении."""