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import logging
from typing import Optional
import resend
from flask import Flask
from configs import dify_config
class Mail:
def __init__(self):
self._client = None
self._default_send_from = None
def is_inited(self) -> bool:
return self._client is not None
def init_app(self, app: Flask):
mail_type = dify_config.MAIL_TYPE
if not mail_type:
logging.warning("MAIL_TYPE is not set")
return
if dify_config.MAIL_DEFAULT_SEND_FROM:
self._default_send_from = dify_config.MAIL_DEFAULT_SEND_FROM
match mail_type:
case "resend":
api_key = dify_config.RESEND_API_KEY
if not api_key:
raise ValueError("RESEND_API_KEY is not set")
api_url = dify_config.RESEND_API_URL
if api_url:
resend.api_url = api_url
resend.api_key = api_key
self._client = resend.Emails
case "smtp":
from libs.smtp import SMTPClient
if not dify_config.SMTP_SERVER or not dify_config.SMTP_PORT:
raise ValueError("SMTP_SERVER and SMTP_PORT are required for smtp mail type")
if not dify_config.SMTP_USE_TLS and dify_config.SMTP_OPPORTUNISTIC_TLS:
raise ValueError("SMTP_OPPORTUNISTIC_TLS is not supported without enabling SMTP_USE_TLS")
self._client = SMTPClient(
server=dify_config.SMTP_SERVER,
port=dify_config.SMTP_PORT,
username=dify_config.SMTP_USERNAME,
password=dify_config.SMTP_PASSWORD,
_from=dify_config.MAIL_DEFAULT_SEND_FROM,
use_tls=dify_config.SMTP_USE_TLS,
opportunistic_tls=dify_config.SMTP_OPPORTUNISTIC_TLS,
)
case _:
raise ValueError("Unsupported mail type {}".format(mail_type))
def send(self, to: str, subject: str, html: str, from_: Optional[str] = None):
if not self._client:
raise ValueError("Mail client is not initialized")
if not from_ and self._default_send_from:
from_ = self._default_send_from
if not from_:
raise ValueError("mail from is not set")
if not to:
raise ValueError("mail to is not set")
if not subject:
raise ValueError("mail subject is not set")
if not html:
raise ValueError("mail html is not set")
self._client.send(
{
"from": from_,
"to": to,
"subject": subject,
"html": html,
}
)
def init_app(app: Flask):
mail.init_app(app)
mail = Mail()
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