import { Injectable, Logger } from '@nestjs/common';
import { ConfigService } from '@nestjs/config';
import * as sgMail from '@sendgrid/mail';
import * as nodemailer from 'nodemailer';
@Injectable()
export class EmailService {
private readonly logger = new Logger(EmailService.name);
private readonly provider: string;
private smtpTransporter?: nodemailer.Transporter;
constructor(private configService: ConfigService) {
this.provider = this.configService.get('EMAIL_PROVIDER', 'SENDGRID');
this.initializeProvider();
}
private initializeProvider() {
switch (this.provider) {
case 'SENDGRID':
const apiKey = this.configService.get('SENDGRID_API_KEY');
if (apiKey) {
sgMail.setApiKey(apiKey);
this.logger.log('SendGrid email provider initialized');
} else {
this.logger.warn('SENDGRID_API_KEY not found, email sending disabled');
}
break;
case 'SMTP':
this.smtpTransporter = nodemailer.createTransport({
host: this.configService.get('SMTP_HOST'),
port: this.configService.get('SMTP_PORT', 587),
secure: this.configService.get('SMTP_SECURE', false),
auth: {
user: this.configService.get('SMTP_USER'),
pass: this.configService.get('SMTP_PASS'),
},
});
this.logger.log('SMTP email provider initialized');
break;
default:
this.logger.warn(`Unknown email provider: ${this.provider}`);
}
}
/**
* Send ticket confirmation email to buyer
*/
async sendTicketConfirmation(data: {
order: any;
raffle: any;
tickets: number[];
}) {
const { order, raffle, tickets } = data;
const subject = `Your ${raffle.name} Raffle Tickets - Confirmation`;
const html = this.generateTicketConfirmationHtml({
buyerName: order.buyerName,
orderDate: order.createdAt,
raffleInfo: {
name: raffle.name,
description: raffle.description,
licenseNumber: raffle.licenseNumber,
rulesUrl: raffle.rulesUrl,
drawDate: raffle.drawAt || 'To be announced',
},
orderSummary: {
orderId: order.id,
quantity: tickets.length,
ticketNumbers: tickets,
totalAmount: `$${(order.amountCents / 100).toFixed(2)} CAD`,
},
charityInfo: {
name: raffle.charityOrg.legalName,
email: raffle.charityOrg.contactEmail,
address: raffle.charityOrg.address,
},
});
const text = this.generateTicketConfirmationText({
buyerName: order.buyerName,
raffleName: raffle.name,
ticketNumbers: tickets,
orderId: order.id,
licenseNumber: raffle.licenseNumber,
});
await this.sendEmail({
to: order.buyerEmail,
subject,
html,
text,
});
this.logger.log(`Sent ticket confirmation email to ${order.buyerEmail} for order ${order.id}`);
}
/**
* Send draw notification email
*/
async sendDrawNotification(data: {
order: any;
raffle: any;
draw: any;
isWinner: boolean;
winningTicketNumber?: number;
}) {
const { order, raffle, draw, isWinner, winningTicketNumber } = data;
const subject = isWinner
? `🎉 CONGRATULATIONS! You Won ${raffle.name}!`
: `${raffle.name} - Draw Results`;
const html = this.generateDrawNotificationHtml({
buyerName: order.buyerName,
isWinner,
raffleName: raffle.name,
winningTicketNumber,
drawDate: draw.drawnAt,
licenseNumber: raffle.licenseNumber,
charityInfo: {
name: raffle.charityOrg.legalName,
email: raffle.charityOrg.contactEmail,
},
});
await this.sendEmail({
to: order.buyerEmail,
subject,
html,
});
this.logger.log(`Sent draw notification email to ${order.buyerEmail} (winner: ${isWinner})`);
}
/**
* Generic email sending method
*/
private async sendEmail(data: {
to: string;
subject: string;
html: string;
text?: string;
}) {
const fromEmail = this.configService.get('SENDGRID_FROM_EMAIL', 'noreply@example.com');
const fromName = this.configService.get('SENDGRID_FROM_NAME', 'Charity Raffle');
try {
switch (this.provider) {
case 'SENDGRID':
await sgMail.send({
to: data.to,
from: {
email: fromEmail,
name: fromName,
},
subject: data.subject,
html: data.html,
text: data.text,
});
break;
case 'SMTP':
if (this.smtpTransporter) {
await this.smtpTransporter.sendMail({
from: `"${fromName}" <${fromEmail}>`,
to: data.to,
subject: data.subject,
html: data.html,
text: data.text,
});
}
break;
default:
this.logger.warn('No email provider configured, skipping email send');
return;
}
this.logger.log(`Email sent successfully to ${data.to}`);
} catch (error) {
this.logger.error(`Failed to send email to ${data.to}: ${error.message}`, error.stack);
throw error;
}
}
/**
* Generate ticket confirmation HTML email
*/
private generateTicketConfirmationHtml(data: any): string {
return `
Raffle Ticket Confirmation
`;
}
/**
* Generate plain text ticket confirmation
*/
private generateTicketConfirmationText(data: any): string {
return `
Raffle Ticket Confirmation
Dear ${data.buyerName},
Thank you for your purchase! Your raffle tickets have been confirmed.
${data.raffleName}
License Number: ${data.licenseNumber}
Your Ticket Numbers: ${data.ticketNumbers.join(', ')}
Order ID: ${data.orderId}
Keep this email as proof of purchase. Winners will be notified by email.
Thank you for your support!
`;
}
/**
* Generate draw notification HTML email
*/
private generateDrawNotificationHtml(data: any): string {
const winnerContent = data.isWinner
? `
Draw Results
`;
}
🎟️ Raffle Ticket Confirmation
Dear ${data.buyerName},
Thank you for your purchase! Your raffle tickets have been confirmed.
${data.raffleInfo.name}
License Number: ${data.raffleInfo.licenseNumber}
Your Ticket Numbers:
${data.orderSummary.ticketNumbers.join(', ')}
Quantity: ${data.orderSummary.quantity} tickets
Total Paid: ${data.orderSummary.totalAmount}
Order ID: ${data.orderSummary.orderId}
Important Information:
- Keep this email as proof of purchase
- Draw date: ${data.raffleInfo.drawDate}
- Rules: View Official Rules
- Winners will be notified by email
Thank you for supporting ${data.charityInfo.name}!
🎉 CONGRATULATIONS! 🎉
You are the winner of ${data.raffleName}!
Winning Ticket Number: ${data.winningTicketNumber}
We will contact you within 24 hours with instructions on how to claim your prize.
` : `The draw for ${data.raffleName} has been completed.
Unfortunately, your tickets were not selected as the winner this time.
Winning Ticket Number: ${data.winningTicketNumber}
Thank you for your participation and support!
`; return `${data.raffleName} - Draw Results
Dear ${data.buyerName},
${winnerContent}Draw Date: ${new Date(data.drawDate).toLocaleDateString()}
License Number: ${data.licenseNumber}