init smtp service

app/services/smtp.py

@@ -0,0 +1,54 @@
+import smtplib
+from email.mime.multipart import MIMEMultipart
+from email.mime.text import MIMEText
+
+from app.config import settings as global_settings
+
+from fastapi.templating import Jinja2Templates
+
+from pydantic import EmailStr
+
+from app.utils.logging import AppLogger
+from app.utils.singleton import SingletonMetaNoArgs
+
+
+logger = AppLogger().get_logger()
+
+
+class SMTPEmailService(metaclass=SingletonMetaNoArgs):
+    def __init__(self):
+        self.server = smtplib.SMTP(
+            global_settings.smtp.server, global_settings.smtp.port
+        )
+        self.server.starttls()
+        self.server.login(global_settings.smtp.username, global_settings.smtp.password)
+        self.templates = Jinja2Templates("templates")
+
+    def send_email(
+        self,
+        sender: EmailStr,
+        recipients: list[EmailStr],
+        subject: str,
+        body_text: str = "",
+        body_html=None,
+    ):
+        msg = MIMEMultipart()
+        msg["From"] = sender
+        msg["To"] = ",".join(recipients)
+        msg["Subject"] = subject
+        msg.attach(MIMEText(body_text, "plain"))
+        if body_html:
+            msg.attach(MIMEText(body_html, "html"))
+        self.server.sendmail(sender, recipients, msg.as_string())
+
+    def send_template_email(
+        self,
+        recipients: list[EmailStr],
+        subject: str,
+        template: str = None,
+        context: dict = None,
+        sender: EmailStr = global_settings.smtp.from_email,
+    ):
+        template_str = self.templates.get_template(template)
+        body_html = template_str.render(context)
+        self.send_email(sender, recipients, subject, body_html=body_html)