Pull email sending concerns out into a standalone service

src/services/email.py

@@ -0,0 +1,42 @@
+from dataclasses import dataclass, field
+from email.utils import formatdate, make_msgid
+import abc
+
+from ..config.email import Email as EmailConfig, EmailAddress
+
+
+@dataclass
+class EmailDTO:
+    # Who the email is from
+    sender: EmailAddress
+    # Who the email is to
+    to: EmailAddress
+    # The subject of the email
+    subject: str
+    # The textual content of the email
+    text: str
+    # HTML alternate content. (Optional: Textual content is required)
+    html: str | None = None
+    # A unique ID for identifying this Email
+    message_id: str = field(default_factory=make_msgid)
+    # The date that the email was sent
+    date: str = field(default_factory=lambda: formatdate(localtime=True))
+
+
+class EmailService:
+    @abc.abstractmethod
+    def send_email(self, email: EmailDTO):
+        pass
+
+
+class BirdEmailServiceImpl(EmailService):
+    def __init__(self, config: EmailConfig):
+        self._config = config
+
+    def send_email(self, email: EmailDTO):
+        # TODO: Implement Bird Specific Email sending and Error handling
+        pass
+
+
+def get_service(config: EmailConfig) -> EmailService:
+    return BirdEmailServiceImpl(config)