Added cpl-mail

src/cpl_mail/email_client_service.py

@@ -0,0 +1,88 @@
+import ssl
+from smtplib import SMTP
+from typing import Optional
+
+from cpl_core.environment.application_environment_abc import ApplicationEnvironmentABC
+from cpl_core.log.logger_abc import LoggerABC
+from cpl_core.utils.credential_manager import CredentialManager
+from cpl_mail.abc.email_client_abc import EMailClientABC
+from cpl_mail.email import EMail
+from cpl_mail.email_client_settings import EMailClientSettings
+
+
+class EMailClient(EMailClientABC):
+    r"""Service to send emails
+
+    Parameter:
+        environment: :class:`cpl_core.environment.application_environment_abc.ApplicationEnvironmentABC`
+            Environment of the application
+        logger: :class:`cpl_core.log.logger_abc.LoggerABC`
+            The logger to use
+        mail_settings: :class:`cpl_mail.email_client_settings.EMailClientSettings`
+            Settings for mailing
+    """
+
+    def __init__(self, environment: ApplicationEnvironmentABC, logger: LoggerABC, mail_settings: EMailClientSettings):
+        EMailClientABC.__init__(self)
+
+        self._environment = environment
+        self._mail_settings = mail_settings
+        self._logger = logger
+
+        self._server: Optional[SMTP] = None
+
+        self.create()
+
+    def create(self):
+        r"""Creates connection"""
+        self._logger.trace(__name__, f"Started {__name__}.create")
+        self.connect()
+        self._logger.trace(__name__, f"Stopped {__name__}.create")
+
+    def connect(self):
+        self._logger.trace(__name__, f"Started {__name__}.connect")
+        try:
+            self._logger.debug(__name__, f"Try to connect to {self._mail_settings.host}:{self._mail_settings.port}")
+            self._server = SMTP(self._mail_settings.host, self._mail_settings.port)
+            self._logger.info(__name__, f"Connected to {self._mail_settings.host}:{self._mail_settings.port}")
+
+            self._logger.debug(__name__, "Try to start tls")
+            self._server.starttls(context=ssl.create_default_context())
+            self._logger.info(__name__, "Started tls")
+        except Exception as e:
+            self._logger.error(__name__, "Cannot connect to mail server", e)
+
+        self._logger.trace(__name__, f"Stopped {__name__}.connect")
+
+    def login(self):
+        r"""Login to server"""
+        self._logger.trace(__name__, f"Started {__name__}.login")
+        try:
+            self._logger.debug(
+                __name__,
+                f"Try to login {self._mail_settings.user_name}@{self._mail_settings.host}:{self._mail_settings.port}",
+            )
+            self._server.login(
+                self._mail_settings.user_name, CredentialManager.decrypt(self._mail_settings.credentials)
+            )
+            self._logger.info(
+                __name__,
+                f"Logged on as {self._mail_settings.user_name} to {self._mail_settings.host}:{self._mail_settings.port}",
+            )
+        except Exception as e:
+            self._logger.error(__name__, "Cannot login to mail server", e)
+
+        self._logger.trace(__name__, f"Stopped {__name__}.login")
+
+    def send_mail(self, email: EMail):
+        self._logger.trace(__name__, f"Started {__name__}.send_mail")
+        try:
+            self.login()
+            self._logger.debug(__name__, f"Try to send email to {email.receiver_list}")
+            self._server.sendmail(
+                self._mail_settings.user_name, email.receiver_list, email.get_content(self._mail_settings.user_name)
+            )
+            self._logger.info(__name__, f"Sent email to {email.receiver_list}")
+        except Exception as e:
+            self._logger.error(__name__, f"Cannot send mail to {email.receiver_list}", e)
+        self._logger.trace(__name__, f"Stopped {__name__}.send_mail")