feat: update style of mail

src/application/contracts/i_sender.py

@@ -4,5 +4,13 @@ from abc import ABC, abstractmethod
 class ISender(ABC):
 
     @abstractmethod
-    async def send(self, to: str, subject: str, body: str, plain: str | None = None) -> None:
+    async def send(
+        self,
+        to: str,
+        subject: str,
+        body: str,
+        plain: str | None = None,
+        *,
+        inline_png: tuple[str, bytes] | None = None,
+    ) -> None:
         raise NotImplementedError

src/infrastructure/mail/assets.py

@@ -1,11 +1,11 @@
-import base64
 from pathlib import Path
 
 _LOGO_PATH = Path(__file__).resolve().parent / 'templates' / 'static' / 'exa-logo.png'
 
+EXA_LOGO_CID = 'exa-logo'
 
-def get_exa_logo_data_uri() -> str | None:
+
+def get_exa_logo_png() -> bytes | None:
     if not _LOGO_PATH.is_file():
         return None
-    data = base64.b64encode(_LOGO_PATH.read_bytes()).decode('ascii')
-    return f'data:image/png;base64,{data}'
+    return _LOGO_PATH.read_bytes()

src/infrastructure/mail/sender.py

@@ -1,5 +1,10 @@
 import aiosmtplib
 from email.message import EmailMessage
+from email.mime.image import MIMEImage
+from email.mime.multipart import MIMEMultipart
+from email.mime.text import MIMEText
+from email.policy import SMTP
+
 from src.application.contracts.i_sender import ISender
 
 
@@ -23,17 +28,34 @@ class EmailSender(ISender):
         self._use_tls = use_tls
         self._timeout = timeout
 
-    async def send(self, to: str, subject: str, body: str, plain: str | None = None) -> None:
-        message = EmailMessage()
-        message["From"] = self._from_addr
-        message["To"] = to
-        message["Subject"] = subject
-
-        if plain:
-            message.set_content(plain)
-            message.add_alternative(body, subtype="html")
+    async def send(
+        self,
+        to: str,
+        subject: str,
+        body: str,
+        plain: str | None = None,
+        *,
+        inline_png: tuple[str, bytes] | None = None,
+    ) -> None:
+        if inline_png and plain:
+            message = self._multipart_with_inline_png(
+                to=to,
+                subject=subject,
+                plain=plain,
+                html=body,
+                content_id=inline_png[0],
+                png_bytes=inline_png[1],
+            )
         else:
-            message.set_content(body, subtype="html")
+            message = EmailMessage()
+            message['From'] = self._from_addr
+            message['To'] = to
+            message['Subject'] = subject
+            if plain:
+                message.set_content(plain)
+                message.add_alternative(body, subtype='html')
+            else:
+                message.set_content(body, subtype='html')
 
         await aiosmtplib.send(
             message,
@@ -41,6 +63,34 @@ class EmailSender(ISender):
             port=self._port,
             username=self._username,
             password=self._password,
-            use_tls=True,
+            use_tls=self._use_tls,
             timeout=self._timeout,
-        )
+        )
+
+    def _multipart_with_inline_png(
+        self,
+        *,
+        to: str,
+        subject: str,
+        plain: str,
+        html: str,
+        content_id: str,
+        png_bytes: bytes,
+    ) -> MIMEMultipart:
+        root = MIMEMultipart('alternative', policy=SMTP)
+        root['Subject'] = subject
+        root['From'] = self._from_addr
+        root['To'] = to
+
+        root.attach(MIMEText(plain, 'plain', 'utf-8'))
+
+        related = MIMEMultipart('related', policy=SMTP)
+        related.attach(MIMEText(html, 'html', 'utf-8'))
+
+        image = MIMEImage(png_bytes, _subtype='png', policy=SMTP)
+        image.add_header('Content-ID', f'<{content_id}>')
+        image.add_header('Content-Disposition', 'inline', filename='exa-logo.png')
+        related.attach(image)
+
+        root.attach(related)
+        return root

src/infrastructure/mail/templates/email_code.html

@@ -28,8 +28,8 @@
               <table role="presentation" cellpadding="0" cellspacing="0" border="0" width="100%">
                 <tr>
                   <td align="left" valign="middle">
-                    {% if logo_data_uri %}
-                    <img src="{{ logo_data_uri }}" alt="{{ brand }}" width="200" height="auto"
+                    {% if logo_src %}
+                    <img src="{{ logo_src }}" alt="{{ brand }}" width="200" height="auto"
                          style="display:block;max-width:200px;height:auto;border:0;outline:none;text-decoration:none;" />
                     {% else %}
                     <div style="font-family:Inter,'Segoe UI',Arial,Helvetica,sans-serif;

src/presentation/messaging/code.py

@@ -3,7 +3,7 @@ from faststream.rabbit.fastapi import RabbitRouter, RabbitMessage
 from src.infrastructure.config import settings
 from src.infrastructure.logger import logger
 from src.infrastructure.mail import TemplateRenderer, get_email_sender, get_renderer
-from src.infrastructure.mail.assets import get_exa_logo_data_uri
+from src.infrastructure.mail.assets import EXA_LOGO_CID, get_exa_logo_png
 from src.infrastructure.mail.sender import EmailSender
 from datetime import datetime
 from typing import Literal, Optional
@@ -53,7 +53,8 @@ async def consume_email_code(
         f"trace_id={trace_id}"
     )
 
-    logo_data_uri = get_exa_logo_data_uri()
+    logo_png = get_exa_logo_png()
+    logo_src = f'cid:{EXA_LOGO_CID}' if logo_png else ''
 
     html = renderer.render(
         'email_code.html',
@@ -61,7 +62,7 @@ async def consume_email_code(
         code=msg_body.payload.code,
         ttl_minutes=msg_body.payload.ttl_seconds // 60,
         brand='Экса',
-        logo_data_uri=logo_data_uri,
+        logo_src=logo_src,
         trace_id=trace_id,
         year=datetime.now().year,
     )
@@ -80,4 +81,5 @@ async def consume_email_code(
         subject='Экса — код подтверждения',
         body=html,
         plain=text,
+        inline_png=(EXA_LOGO_CID, logo_png) if logo_png else None,
     )