feat: Implement email service with welcome, password reset, and verification templates, and add application logo.

src/email/email.service.ts

@@ -0,0 +1,136 @@
+import { Injectable, Logger } from '@nestjs/common';
+import { ConfigService } from '@nestjs/config';
+import * as nodemailer from 'nodemailer';
+import { Transporter } from 'nodemailer';
+
+import {
+  getVerificationEmailTemplate,
+  getPasswordResetTemplate,
+  getWelcomeEmailTemplate,
+} from './templates';
+
+export interface EmailOptions {
+  to: string;
+  subject: string;
+  html: string;
+  text?: string;
+}
+
+@Injectable()
+export class EmailService {
+  private readonly logger = new Logger(EmailService.name);
+  private transporter: Transporter;
+
+  constructor(private readonly configService: ConfigService) {
+    this.createTransporter();
+  }
+
+  private createTransporter() {
+    const host = this.configService.get<string>('SMTP_HOST');
+    const port = this.configService.get<number>('SMTP_PORT');
+    const user = this.configService.get<string>('SMTP_USER');
+    const pass = this.configService.get<string>('SMTP_PASS');
+
+    if (!host || !user || !pass) {
+      this.logger.warn('SMTP configuration incomplete. Emails will be logged only.');
+      return;
+    }
+
+    this.transporter = nodemailer.createTransport({
+      host,
+      port: port || 465,
+      secure: true, // SSL/TLS
+      auth: {
+        user,
+        pass,
+      },
+    });
+
+    // Verify connection
+    this.transporter.verify((error) => {
+      if (error) {
+        this.logger.error('SMTP connection failed:', error);
+      } else {
+        this.logger.log('SMTP connection established successfully');
+      }
+    });
+  }
+
+  async sendEmail(options: EmailOptions): Promise<boolean> {
+    const from = this.configService.get<string>('SMTP_FROM') ||
+                 this.configService.get<string>('SMTP_USER');
+
+    if (!this.transporter) {
+      this.logger.warn('No SMTP transporter. Logging email instead:');
+      this.logger.log(`To: ${options.to}`);
+      this.logger.log(`Subject: ${options.subject}`);
+      this.logger.log(`Body: ${options.text || 'HTML email'}`);
+      return false;
+    }
+
+    try {
+      const info = await this.transporter.sendMail({
+        from: `"RE-QuestN" <${from}>`,
+        to: options.to,
+        subject: options.subject,
+        html: options.html,
+        text: options.text,
+      });
+
+      this.logger.log(`Email sent successfully: ${info.messageId}`);
+      return true;
+    } catch (error) {
+      this.logger.error(`Failed to send email to ${options.to}:`, error);
+      return false;
+    }
+  }
+
+  // ==========================================
+  // EMAIL VERIFICATION
+  // ==========================================
+  async sendVerificationEmail(email: string, token: string, name?: string): Promise<boolean> {
+    const frontendUrl = this.configService.get<string>('FRONTEND_URL') || 'http://localhost:3000';
+    const verificationUrl = `${frontendUrl}/verify-email?token=${token}`;
+
+    const html = getVerificationEmailTemplate({ verificationUrl, name });
+    const text = `Welcome to RE-QuestN! Please verify your email by clicking this link: ${verificationUrl}`;
+
+    return this.sendEmail({
+      to: email,
+      subject: 'Verify Your Email - RE-QuestN',
+      html,
+      text,
+    });
+  }
+
+  // ==========================================
+  // PASSWORD RESET
+  // ==========================================
+  async sendPasswordResetEmail(email: string, resetUrl: string): Promise<boolean> {
+    const html = getPasswordResetTemplate({ resetUrl });
+    const text = `Reset your password by clicking this link: ${resetUrl}. This link will expire in 1 hour.`;
+
+    return this.sendEmail({
+      to: email,
+      subject: 'Reset Your Password - RE-QuestN',
+      html,
+      text,
+    });
+  }
+
+  // ==========================================
+  // WELCOME EMAIL
+  // ==========================================
+  async sendWelcomeEmail(email: string, name?: string): Promise<boolean> {
+    const frontendUrl = this.configService.get<string>('FRONTEND_URL') || 'http://localhost:3000';
+    const html = getWelcomeEmailTemplate({ name, frontendUrl });
+    const text = `Welcome to RE-QuestN, ${name || 'User'}! Your real estate journey starts now.`;
+
+    return this.sendEmail({
+      to: email,
+      subject: 'Welcome to RE-QuestN!',
+      html,
+      text,
+    });
+  }
+}