fix: credit tracking, voice clone TTL, avatar upload ui, asset serving fallback, OAuth encryption, free plan video renders, backlink outreach sprint

backend/services/backlink_outreach_sender.py

@@ -0,0 +1,90 @@
+"""Email sender for backlink outreach via SMTP."""
+
+from __future__ import annotations
+
+import os
+import ssl
+import smtplib
+import asyncio
+from email.mime.text import MIMEText
+from email.mime.multipart import MIMEMultipart
+from typing import Optional
+from loguru import logger
+
+
+SMTP_HOST = os.getenv("SMTP_HOST", "smtp.gmail.com")
+SMTP_PORT = int(os.getenv("SMTP_PORT", "587"))
+SMTP_USERNAME = os.getenv("SMTP_USERNAME", "")
+SMTP_PASSWORD = os.getenv("SMTP_PASSWORD", "")
+SMTP_FROM_EMAIL = os.getenv("SMTP_FROM_EMAIL", SMTP_USERNAME)
+SMTP_USE_TLS = os.getenv("SMTP_USE_TLS", "true").lower() in ("true", "1", "yes")
+SMTP_VERIFY_TLS = os.getenv("SMTP_VERIFY_TLS", "true").lower() in ("true", "1", "yes")
+SMTP_SEND_TIMEOUT = int(os.getenv("SMTP_SEND_TIMEOUT", "30"))
+
+
+class BacklinkOutreachSender:
+    def __init__(self):
+        self._host = SMTP_HOST
+        self._port = SMTP_PORT
+        self._username = SMTP_USERNAME
+        self._password = SMTP_PASSWORD
+        self._from_email = SMTP_FROM_EMAIL or SMTP_USERNAME
+        self._use_tls = SMTP_USE_TLS
+        self._verify_tls = SMTP_VERIFY_TLS
+        self._timeout = SMTP_SEND_TIMEOUT
+
+    def is_configured(self) -> bool:
+        return bool(self._username and self._password)
+
+    async def send_email(
+        self,
+        to_email: str,
+        subject: str,
+        body: str,
+        from_email: Optional[str] = None,
+    ) -> bool:
+        if not self.is_configured():
+            logger.error("SMTP not configured: set SMTP_USERNAME and SMTP_PASSWORD")
+            return False
+
+        sender = from_email or self._from_email
+
+        msg = MIMEMultipart("alternative")
+        msg["From"] = sender
+        msg["To"] = to_email
+        msg["Subject"] = subject
+        msg.attach(MIMEText(body, "plain"))
+
+        loop = asyncio.get_running_loop()
+
+        def _send() -> bool:
+            try:
+                tls_context = ssl.create_default_context()
+                if not self._verify_tls:
+                    tls_context.check_hostname = False
+                    tls_context.verify_mode = ssl.CERT_NONE
+                with smtplib.SMTP(self._host, self._port, timeout=self._timeout) as server:
+                    if self._use_tls:
+                        server.starttls(context=tls_context)
+                        server.ehlo()
+                    server.login(self._username, self._password)
+                    server.sendmail(sender, [to_email], msg.as_string())
+                logger.info(f"Email sent to {to_email}: {subject[:60]}")
+                return True
+            except smtplib.SMTPException as e:
+                logger.error(f"SMTP error sending to {to_email}: {e}")
+                return False
+            except Exception as e:
+                logger.error(f"Unexpected error sending to {to_email}: {e}")
+                return False
+
+        return await loop.run_in_executor(None, _send)
+
+    def personalize(self, template: str, variables: dict) -> str:
+        """Replace {placeholder} variables in a template string."""
+        for key, value in variables.items():
+            template = template.replace(f"{{{key}}}", str(value))
+        return template
+
+
+backlink_outreach_sender = BacklinkOutreachSender()