feat: add email system with multi-provider support
Implements a comprehensive email system with: - Multi-provider support (SMTP, SendGrid, Mailgun, Amazon SES) - Database-stored templates with i18n (EN, FR, DE, LB) - Jinja2 template rendering with variable interpolation - Email logging for debugging and compliance - Debug mode for development (logs instead of sending) - Welcome email integration in signup flow New files: - models/database/email.py: EmailTemplate and EmailLog models - app/services/email_service.py: Provider abstraction and service - scripts/seed_email_templates.py: Template seeding script - tests/unit/services/test_email_service.py: 28 unit tests - docs/features/email-system.md: Complete documentation 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
@@ -125,6 +125,39 @@ class Settings(BaseSettings):
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stripe_webhook_secret: str = ""
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stripe_trial_days: int = 30 # 1-month free trial (card collected upfront but not charged)
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# =============================================================================
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# EMAIL CONFIGURATION
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# =============================================================================
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# Provider: smtp, sendgrid, mailgun, ses
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email_provider: str = "smtp"
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email_from_address: str = "noreply@wizamart.com"
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email_from_name: str = "Wizamart"
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email_reply_to: str = "" # Optional reply-to address
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# SMTP Settings (used when email_provider=smtp)
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smtp_host: str = "localhost"
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smtp_port: int = 587
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smtp_user: str = ""
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smtp_password: str = ""
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smtp_use_tls: bool = True
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smtp_use_ssl: bool = False # For port 465
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# SendGrid (used when email_provider=sendgrid)
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sendgrid_api_key: str = ""
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# Mailgun (used when email_provider=mailgun)
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mailgun_api_key: str = ""
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mailgun_domain: str = ""
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# Amazon SES (used when email_provider=ses)
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aws_access_key_id: str = ""
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aws_secret_access_key: str = ""
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aws_region: str = "eu-west-1"
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# Email behavior
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email_enabled: bool = True # Set to False to disable all emails
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email_debug: bool = False # Log emails instead of sending (for development)
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# =============================================================================
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# DEMO/SEED DATA CONFIGURATION
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# =============================================================================
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572
app/services/email_service.py
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572
app/services/email_service.py
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@@ -0,0 +1,572 @@
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# app/services/email_service.py
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"""
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Email service with multi-provider support.
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Supports:
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- SMTP (default)
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- SendGrid
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- Mailgun
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- Amazon SES
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Features:
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- Multi-language templates from database
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- Jinja2 template rendering
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- Email logging and tracking
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- Queue support via background tasks
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"""
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import json
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import logging
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import smtplib
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from abc import ABC, abstractmethod
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from email.mime.multipart import MIMEMultipart
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from email.mime.text import MIMEText
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from typing import Any
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from jinja2 import Environment, BaseLoader
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from sqlalchemy.orm import Session
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from app.core.config import settings
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from models.database.email import EmailLog, EmailStatus, EmailTemplate
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logger = logging.getLogger(__name__)
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# =============================================================================
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# EMAIL PROVIDER ABSTRACTION
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# =============================================================================
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class EmailProvider(ABC):
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"""Abstract base class for email providers."""
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@abstractmethod
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def send(
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self,
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to_email: str,
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to_name: str | None,
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subject: str,
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body_html: str,
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body_text: str | None,
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from_email: str,
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from_name: str | None,
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reply_to: str | None = None,
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) -> tuple[bool, str | None, str | None]:
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"""
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Send an email.
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Returns:
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tuple: (success, provider_message_id, error_message)
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"""
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pass
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class SMTPProvider(EmailProvider):
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"""SMTP email provider."""
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def send(
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self,
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to_email: str,
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to_name: str | None,
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subject: str,
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body_html: str,
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body_text: str | None,
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from_email: str,
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from_name: str | None,
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reply_to: str | None = None,
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) -> tuple[bool, str | None, str | None]:
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try:
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msg = MIMEMultipart("alternative")
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msg["Subject"] = subject
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msg["From"] = f"{from_name} <{from_email}>" if from_name else from_email
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msg["To"] = f"{to_name} <{to_email}>" if to_name else to_email
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if reply_to:
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msg["Reply-To"] = reply_to
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# Attach text and HTML parts
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if body_text:
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msg.attach(MIMEText(body_text, "plain", "utf-8"))
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msg.attach(MIMEText(body_html, "html", "utf-8"))
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# Connect and send
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if settings.smtp_use_ssl:
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server = smtplib.SMTP_SSL(settings.smtp_host, settings.smtp_port)
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else:
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server = smtplib.SMTP(settings.smtp_host, settings.smtp_port)
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try:
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if settings.smtp_use_tls and not settings.smtp_use_ssl:
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server.starttls()
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if settings.smtp_user and settings.smtp_password:
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server.login(settings.smtp_user, settings.smtp_password)
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server.sendmail(from_email, [to_email], msg.as_string())
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return True, None, None
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finally:
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server.quit()
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except Exception as e:
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logger.error(f"SMTP send error: {e}")
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return False, None, str(e)
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class SendGridProvider(EmailProvider):
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"""SendGrid email provider."""
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def send(
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self,
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to_email: str,
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to_name: str | None,
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subject: str,
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body_html: str,
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body_text: str | None,
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from_email: str,
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from_name: str | None,
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reply_to: str | None = None,
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) -> tuple[bool, str | None, str | None]:
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try:
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from sendgrid import SendGridAPIClient
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from sendgrid.helpers.mail import Mail, Email, To, Content
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message = Mail(
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from_email=Email(from_email, from_name),
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to_emails=To(to_email, to_name),
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subject=subject,
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)
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message.add_content(Content("text/html", body_html))
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if body_text:
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message.add_content(Content("text/plain", body_text))
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if reply_to:
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message.reply_to = Email(reply_to)
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sg = SendGridAPIClient(settings.sendgrid_api_key)
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response = sg.send(message)
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if response.status_code in (200, 201, 202):
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message_id = response.headers.get("X-Message-Id")
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return True, message_id, None
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else:
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return False, None, f"SendGrid error: {response.status_code}"
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except ImportError:
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return False, None, "SendGrid library not installed. Run: pip install sendgrid"
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except Exception as e:
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logger.error(f"SendGrid send error: {e}")
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return False, None, str(e)
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class MailgunProvider(EmailProvider):
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"""Mailgun email provider."""
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def send(
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self,
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to_email: str,
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to_name: str | None,
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subject: str,
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body_html: str,
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body_text: str | None,
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from_email: str,
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from_name: str | None,
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reply_to: str | None = None,
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) -> tuple[bool, str | None, str | None]:
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try:
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import requests
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from_str = f"{from_name} <{from_email}>" if from_name else from_email
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to_str = f"{to_name} <{to_email}>" if to_name else to_email
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data = {
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"from": from_str,
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"to": to_str,
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"subject": subject,
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"html": body_html,
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}
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if body_text:
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data["text"] = body_text
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if reply_to:
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data["h:Reply-To"] = reply_to
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response = requests.post(
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f"https://api.mailgun.net/v3/{settings.mailgun_domain}/messages",
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auth=("api", settings.mailgun_api_key),
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data=data,
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timeout=30,
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)
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if response.status_code == 200:
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result = response.json()
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return True, result.get("id"), None
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else:
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return False, None, f"Mailgun error: {response.status_code} - {response.text}"
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except Exception as e:
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logger.error(f"Mailgun send error: {e}")
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return False, None, str(e)
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class SESProvider(EmailProvider):
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"""Amazon SES email provider."""
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def send(
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self,
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to_email: str,
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to_name: str | None,
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subject: str,
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body_html: str,
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body_text: str | None,
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from_email: str,
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from_name: str | None,
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reply_to: str | None = None,
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) -> tuple[bool, str | None, str | None]:
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try:
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import boto3
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ses = boto3.client(
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"ses",
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region_name=settings.aws_region,
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aws_access_key_id=settings.aws_access_key_id,
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aws_secret_access_key=settings.aws_secret_access_key,
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)
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from_str = f"{from_name} <{from_email}>" if from_name else from_email
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body = {"Html": {"Charset": "UTF-8", "Data": body_html}}
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if body_text:
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body["Text"] = {"Charset": "UTF-8", "Data": body_text}
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kwargs = {
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"Source": from_str,
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"Destination": {"ToAddresses": [to_email]},
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"Message": {
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"Subject": {"Charset": "UTF-8", "Data": subject},
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"Body": body,
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},
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}
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if reply_to:
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kwargs["ReplyToAddresses"] = [reply_to]
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response = ses.send_email(**kwargs)
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return True, response.get("MessageId"), None
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except ImportError:
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return False, None, "boto3 library not installed. Run: pip install boto3"
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except Exception as e:
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logger.error(f"SES send error: {e}")
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return False, None, str(e)
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class DebugProvider(EmailProvider):
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"""Debug provider - logs emails instead of sending."""
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def send(
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self,
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to_email: str,
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to_name: str | None,
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subject: str,
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body_html: str,
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body_text: str | None,
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from_email: str,
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from_name: str | None,
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reply_to: str | None = None,
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) -> tuple[bool, str | None, str | None]:
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logger.info(
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f"\n{'='*60}\n"
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f"DEBUG EMAIL\n"
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f"{'='*60}\n"
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f"To: {to_name} <{to_email}>\n"
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f"From: {from_name} <{from_email}>\n"
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f"Reply-To: {reply_to}\n"
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f"Subject: {subject}\n"
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f"{'='*60}\n"
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f"Body (text):\n{body_text or '(none)'}\n"
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f"{'='*60}\n"
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f"Body (html):\n{body_html[:500]}...\n"
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f"{'='*60}\n"
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)
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return True, f"debug-{to_email}", None
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# =============================================================================
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# EMAIL SERVICE
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# =============================================================================
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def get_provider() -> EmailProvider:
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"""Get the configured email provider."""
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if settings.email_debug:
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return DebugProvider()
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provider_map = {
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"smtp": SMTPProvider,
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"sendgrid": SendGridProvider,
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"mailgun": MailgunProvider,
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"ses": SESProvider,
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}
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provider_class = provider_map.get(settings.email_provider.lower())
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if not provider_class:
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logger.warning(f"Unknown email provider: {settings.email_provider}, using SMTP")
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return SMTPProvider()
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return provider_class()
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class EmailService:
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"""
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Email service for sending templated emails.
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Usage:
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email_service = EmailService(db)
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# Send using database template
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email_service.send_template(
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template_code="signup_welcome",
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language="en",
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to_email="user@example.com",
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to_name="John Doe",
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variables={"first_name": "John", "login_url": "https://..."},
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vendor_id=1,
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)
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# Send raw email
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email_service.send_raw(
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to_email="user@example.com",
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subject="Hello",
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body_html="<h1>Hello</h1>",
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)
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"""
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def __init__(self, db: Session):
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self.db = db
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self.provider = get_provider()
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self.jinja_env = Environment(loader=BaseLoader())
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def get_template(
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self, template_code: str, language: str = "en"
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) -> EmailTemplate | None:
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"""Get email template from database with fallback to English."""
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template = (
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self.db.query(EmailTemplate)
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.filter(
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EmailTemplate.code == template_code,
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EmailTemplate.language == language,
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EmailTemplate.is_active == True,
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)
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.first()
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)
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# Fallback to English if not found
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if not template and language != "en":
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template = (
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self.db.query(EmailTemplate)
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.filter(
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EmailTemplate.code == template_code,
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EmailTemplate.language == "en",
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EmailTemplate.is_active == True,
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)
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.first()
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)
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return template
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def render_template(self, template_string: str, variables: dict[str, Any]) -> str:
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"""Render a Jinja2 template string with variables."""
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try:
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template = self.jinja_env.from_string(template_string)
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return template.render(**variables)
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except Exception as e:
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logger.error(f"Template rendering error: {e}")
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return template_string
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def send_template(
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self,
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template_code: str,
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to_email: str,
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to_name: str | None = None,
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language: str = "en",
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variables: dict[str, Any] | None = None,
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vendor_id: int | None = None,
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user_id: int | None = None,
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related_type: str | None = None,
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related_id: int | None = None,
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) -> EmailLog:
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"""
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Send an email using a database template.
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Args:
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template_code: Template code (e.g., "signup_welcome")
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to_email: Recipient email address
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to_name: Recipient name (optional)
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language: Language code (default: "en")
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variables: Template variables dict
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vendor_id: Related vendor ID for logging
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user_id: Related user ID for logging
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related_type: Related entity type (e.g., "order")
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related_id: Related entity ID
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Returns:
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EmailLog record
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"""
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variables = variables or {}
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# Get template
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template = self.get_template(template_code, language)
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if not template:
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logger.error(f"Email template not found: {template_code} ({language})")
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# Create failed log entry
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log = EmailLog(
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template_code=template_code,
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recipient_email=to_email,
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recipient_name=to_name,
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subject=f"[Template not found: {template_code}]",
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from_email=settings.email_from_address,
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from_name=settings.email_from_name,
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status=EmailStatus.FAILED.value,
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error_message=f"Template not found: {template_code} ({language})",
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provider=settings.email_provider,
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vendor_id=vendor_id,
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user_id=user_id,
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related_type=related_type,
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related_id=related_id,
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)
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self.db.add(log)
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self.db.commit()
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return log
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# Render template
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subject = self.render_template(template.subject, variables)
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body_html = self.render_template(template.body_html, variables)
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body_text = (
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self.render_template(template.body_text, variables)
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if template.body_text
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else None
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)
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return self.send_raw(
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to_email=to_email,
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to_name=to_name,
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subject=subject,
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body_html=body_html,
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body_text=body_text,
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template_code=template_code,
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template_id=template.id,
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vendor_id=vendor_id,
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user_id=user_id,
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related_type=related_type,
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related_id=related_id,
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extra_data=json.dumps(variables) if variables else None,
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)
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def send_raw(
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||||
self,
|
||||
to_email: str,
|
||||
subject: str,
|
||||
body_html: str,
|
||||
to_name: str | None = None,
|
||||
body_text: str | None = None,
|
||||
from_email: str | None = None,
|
||||
from_name: str | None = None,
|
||||
reply_to: str | None = None,
|
||||
template_code: str | None = None,
|
||||
template_id: int | None = None,
|
||||
vendor_id: int | None = None,
|
||||
user_id: int | None = None,
|
||||
related_type: str | None = None,
|
||||
related_id: int | None = None,
|
||||
extra_data: str | None = None,
|
||||
) -> EmailLog:
|
||||
"""
|
||||
Send a raw email without using a template.
|
||||
|
||||
Returns:
|
||||
EmailLog record
|
||||
"""
|
||||
from_email = from_email or settings.email_from_address
|
||||
from_name = from_name or settings.email_from_name
|
||||
reply_to = reply_to or settings.email_reply_to or None
|
||||
|
||||
# Create log entry
|
||||
log = EmailLog(
|
||||
template_code=template_code,
|
||||
template_id=template_id,
|
||||
recipient_email=to_email,
|
||||
recipient_name=to_name,
|
||||
subject=subject,
|
||||
body_html=body_html,
|
||||
body_text=body_text,
|
||||
from_email=from_email,
|
||||
from_name=from_name,
|
||||
reply_to=reply_to,
|
||||
status=EmailStatus.PENDING.value,
|
||||
provider=settings.email_provider,
|
||||
vendor_id=vendor_id,
|
||||
user_id=user_id,
|
||||
related_type=related_type,
|
||||
related_id=related_id,
|
||||
extra_data=extra_data,
|
||||
)
|
||||
self.db.add(log)
|
||||
self.db.flush()
|
||||
|
||||
# Check if emails are disabled
|
||||
if not settings.email_enabled:
|
||||
log.status = EmailStatus.FAILED.value
|
||||
log.error_message = "Email sending is disabled"
|
||||
self.db.commit()
|
||||
logger.info(f"Email sending disabled, skipping: {to_email}")
|
||||
return log
|
||||
|
||||
# Send email
|
||||
success, message_id, error = self.provider.send(
|
||||
to_email=to_email,
|
||||
to_name=to_name,
|
||||
subject=subject,
|
||||
body_html=body_html,
|
||||
body_text=body_text,
|
||||
from_email=from_email,
|
||||
from_name=from_name,
|
||||
reply_to=reply_to,
|
||||
)
|
||||
|
||||
if success:
|
||||
log.mark_sent(message_id)
|
||||
logger.info(f"Email sent to {to_email}: {subject}")
|
||||
else:
|
||||
log.mark_failed(error or "Unknown error")
|
||||
logger.error(f"Email failed to {to_email}: {error}")
|
||||
|
||||
self.db.commit()
|
||||
return log
|
||||
|
||||
|
||||
# =============================================================================
|
||||
# CONVENIENCE FUNCTIONS
|
||||
# =============================================================================
|
||||
|
||||
|
||||
def send_email(
|
||||
db: Session,
|
||||
template_code: str,
|
||||
to_email: str,
|
||||
to_name: str | None = None,
|
||||
language: str = "en",
|
||||
variables: dict[str, Any] | None = None,
|
||||
**kwargs,
|
||||
) -> EmailLog:
|
||||
"""Convenience function to send a templated email."""
|
||||
service = EmailService(db)
|
||||
return service.send_template(
|
||||
template_code=template_code,
|
||||
to_email=to_email,
|
||||
to_name=to_name,
|
||||
language=language,
|
||||
variables=variables,
|
||||
**kwargs,
|
||||
)
|
||||
@@ -22,12 +22,14 @@ from app.exceptions import (
|
||||
ResourceNotFoundException,
|
||||
ValidationException,
|
||||
)
|
||||
from app.services.email_service import EmailService
|
||||
from app.services.stripe_service import stripe_service
|
||||
from middleware.auth import AuthManager
|
||||
from models.database.company import Company
|
||||
from models.database.subscription import (
|
||||
SubscriptionStatus,
|
||||
TierCode,
|
||||
TIER_LIMITS,
|
||||
VendorSubscription,
|
||||
)
|
||||
from models.database.user import User
|
||||
@@ -467,6 +469,62 @@ class PlatformSignupService:
|
||||
|
||||
return setup_intent.client_secret, stripe_customer_id
|
||||
|
||||
# =========================================================================
|
||||
# Welcome Email
|
||||
# =========================================================================
|
||||
|
||||
def send_welcome_email(
|
||||
self,
|
||||
db: Session,
|
||||
user: User,
|
||||
vendor: Vendor,
|
||||
tier_code: str,
|
||||
language: str = "fr",
|
||||
) -> None:
|
||||
"""
|
||||
Send welcome email to new vendor.
|
||||
|
||||
Args:
|
||||
db: Database session
|
||||
user: User who signed up
|
||||
vendor: Vendor that was created
|
||||
tier_code: Selected tier code
|
||||
language: Language for email (default: French)
|
||||
"""
|
||||
try:
|
||||
# Get tier name
|
||||
tier_enum = TierCode(tier_code)
|
||||
tier_name = TIER_LIMITS.get(tier_enum, {}).get("name", tier_code.title())
|
||||
|
||||
# Build login URL
|
||||
login_url = f"https://{settings.platform_domain}/vendor/{vendor.vendor_code}/dashboard"
|
||||
|
||||
email_service = EmailService(db)
|
||||
email_service.send_template(
|
||||
template_code="signup_welcome",
|
||||
language=language,
|
||||
to_email=user.email,
|
||||
to_name=f"{user.first_name} {user.last_name}",
|
||||
variables={
|
||||
"first_name": user.first_name,
|
||||
"company_name": vendor.name,
|
||||
"email": user.email,
|
||||
"vendor_code": vendor.vendor_code,
|
||||
"login_url": login_url,
|
||||
"trial_days": settings.stripe_trial_days,
|
||||
"tier_name": tier_name,
|
||||
},
|
||||
vendor_id=vendor.id,
|
||||
user_id=user.id,
|
||||
related_type="signup",
|
||||
)
|
||||
|
||||
logger.info(f"Welcome email sent to {user.email}")
|
||||
|
||||
except Exception as e:
|
||||
# Log error but don't fail signup
|
||||
logger.error(f"Failed to send welcome email to {user.email}: {e}")
|
||||
|
||||
# =========================================================================
|
||||
# Signup Completion
|
||||
# =========================================================================
|
||||
@@ -543,6 +601,15 @@ class PlatformSignupService:
|
||||
else datetime.now(UTC) + timedelta(days=30)
|
||||
)
|
||||
|
||||
# Get user for welcome email
|
||||
user_id = session.get("user_id")
|
||||
user = db.query(User).filter(User.id == user_id).first() if user_id else None
|
||||
|
||||
# Send welcome email
|
||||
if user and vendor:
|
||||
tier_code = session.get("tier_code", TierCode.ESSENTIAL.value)
|
||||
self.send_welcome_email(db, user, vendor, tier_code)
|
||||
|
||||
# Clean up session
|
||||
self.delete_session(session_id)
|
||||
|
||||
|
||||
Reference in New Issue
Block a user