import nodemailer from "nodemailer"; import { generateCertificate } from "./certificateGenerator.ts"; export interface CertificationEmailOptions { adminName: string; adminEmail: string; certificationTitle: string; certificationLevel: string; certificationNumber: string; issueDate: Date; expirationDate: Date; verificationUrl: string; certificatePdfBuffer?: Buffer; } /** * Email transporter configuration * In production, use environment variables for SMTP settings */ const transporter = nodemailer.createTransport({ host: process.env.SMTP_HOST || "smtp.gmail.com", port: parseInt(process.env.SMTP_PORT || "587"), secure: process.env.SMTP_SECURE === "true", auth: { user: process.env.SMTP_USER, pass: process.env.SMTP_PASSWORD, }, }); /** * Send certification email with PDF attachment */ export async function sendCertificationEmail( options: CertificationEmailOptions ): Promise<{ success: boolean; messageId?: string; error?: string }> { try { // Generate certificate PDF if not provided let pdfBuffer = options.certificatePdfBuffer; if (!pdfBuffer) { pdfBuffer = await generateCertificate({ adminName: options.adminName, certificationName: options.certificationTitle, certificationNumber: options.certificationNumber, issueDate: options.issueDate, expirationDate: options.expirationDate, organizationName: "CoinKrazy.com", verificationUrl: options.verificationUrl, }); } // Create email HTML const emailHtml = createCertificationEmailHtml({ adminName: options.adminName, certificationTitle: options.certificationTitle, certificationLevel: options.certificationLevel, certificationNumber: options.certificationNumber, issueDate: options.issueDate, expirationDate: options.expirationDate, verificationUrl: options.verificationUrl, }); // Send email const info = await transporter.sendMail({ from: process.env.SMTP_FROM || "noreply@playplaycoinkrazy.com", to: options.adminEmail, subject: `🎓 Congratulations! Your ${options.certificationTitle} Certificate`, html: emailHtml, attachments: [ { filename: `certificate-${options.adminName.replace(/\s+/g, "-")}-${Date.now()}.pdf`, content: pdfBuffer, contentType: "application/pdf", }, ], }); console.log("Certification email sent:", info.messageId); return { success: true, messageId: info.messageId }; } catch (error) { console.error("Failed to send certification email:", error); return { success: false, error: error instanceof Error ? error.message : "Unknown error", }; } } /** * Send certification expiration reminder email */ export async function sendCertificationExpirationReminder( adminName: string, adminEmail: string, certificationTitle: string, expirationDate: Date, verificationUrl: string ): Promise<{ success: boolean; messageId?: string; error?: string }> { try { const daysUntilExpiration = Math.ceil( (expirationDate.getTime() - Date.now()) / (1000 * 60 * 60 * 24) ); const emailHtml = `

Hi ${adminName},

Your ${certificationTitle} certification will expire in ${daysUntilExpiration} days on ${expirationDate.toLocaleDateString()}.

To renew your certification or verify its current status, please visit the verification page:

View Certificate

If you have any questions about your certification, please contact our support team.

`; const info = await transporter.sendMail({ from: process.env.SMTP_FROM || "noreply@playplaycoinkrazy.com", to: adminEmail, subject: `⏰ Reminder: Your ${certificationTitle} Certificate Expires in ${daysUntilExpiration} Days`, html: emailHtml, }); console.log("Expiration reminder email sent:", info.messageId); return { success: true, messageId: info.messageId }; } catch (error) { console.error("Failed to send expiration reminder email:", error); return { success: false, error: error instanceof Error ? error.message : "Unknown error", }; } } /** * Create HTML email template for certification */ function createCertificationEmailHtml(options: { adminName: string; certificationTitle: string; certificationLevel: string; certificationNumber: string; issueDate: Date; expirationDate: Date; verificationUrl: string; }): string { return `

Hi ${options.adminName},

We're pleased to inform you that your ${options.certificationTitle} certification has been successfully issued!

Certification Title ${options.certificationTitle}

Level ${options.certificationLevel.toUpperCase()}

Certificate Number ${options.certificationNumber}

Issue Date ${options.issueDate.toLocaleDateString("en-US", { year: "numeric", month: "long", day: "numeric", })}

Expiration Date ${options.expirationDate.toLocaleDateString("en-US", { year: "numeric", month: "long", day: "numeric", })}

Your certificate is attached to this email as a PDF file. You can also verify and download your certificate at any time using the link below:

Verify Certificate

Next Steps:

Download and save your certificate PDF
Add your certification to your LinkedIn profile
Share your achievement with your network
Continue learning with advanced modules

If you have any questions about your certification or need assistance, please don't hesitate to contact our support team.

`; } /** * Test email configuration */ export async function testEmailConfiguration(): Promise { try { await transporter.verify(); console.log("Email configuration verified successfully"); return true; } catch (error) { console.error("Email configuration verification failed:", error); return false; } }