Feat/email register refactor (#25369)

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
Co-authored-by: crazywoola <100913391+crazywoola@users.noreply.github.com>
Co-authored-by: Joel <iamjoel007@gmail.com>

api/tasks/mail_reset_password_task.py

@@ -4,6 +4,7 @@ import time
 import click
 from celery import shared_task
 
+from configs import dify_config
 from extensions.ext_mail import mail
 from libs.email_i18n import EmailType, get_email_i18n_service
 
@@ -44,3 +45,47 @@ def send_reset_password_mail_task(language: str, to: str, code: str):
         )
     except Exception:
         logger.exception("Send password reset mail to %s failed", to)
+
+
+@shared_task(queue="mail")
+def send_reset_password_mail_task_when_account_not_exist(language: str, to: str, is_allow_register: bool) -> None:
+    """
+    Send reset password email with internationalization support when account not exist.
+
+    Args:
+        language: Language code for email localization
+        to: Recipient email address
+    """
+    if not mail.is_inited():
+        return
+
+    logger.info(click.style(f"Start password reset mail to {to}", fg="green"))
+    start_at = time.perf_counter()
+
+    try:
+        if is_allow_register:
+            sign_up_url = f"{dify_config.CONSOLE_WEB_URL}/signup"
+            email_service = get_email_i18n_service()
+            email_service.send_email(
+                email_type=EmailType.RESET_PASSWORD_WHEN_ACCOUNT_NOT_EXIST,
+                language_code=language,
+                to=to,
+                template_context={
+                    "to": to,
+                    "sign_up_url": sign_up_url,
+                },
+            )
+        else:
+            email_service = get_email_i18n_service()
+            email_service.send_email(
+                email_type=EmailType.RESET_PASSWORD_WHEN_ACCOUNT_NOT_EXIST_NO_REGISTER,
+                language_code=language,
+                to=to,
+            )
+
+        end_at = time.perf_counter()
+        logger.info(
+            click.style(f"Send password reset mail to {to} succeeded: latency: {end_at - start_at}", fg="green")
+        )
+    except Exception:
+        logger.exception("Send password reset mail to %s failed", to)