Initial commit with Email Import Wizard and Task Processor updates

paperless-backend/src/postprocessing/mail.service.ts

@@ -0,0 +1,43 @@
+import { Injectable, Logger } from '@nestjs/common';
+import { ConfigService } from '@nestjs/config';
+import * as nodemailer from 'nodemailer';
+
+@Injectable()
+export class MailService {
+  private readonly logger = new Logger(MailService.name);
+  private transporter: nodemailer.Transporter;
+
+  constructor(private readonly configService: ConfigService) {
+    this.transporter = nodemailer.createTransport({
+      host: this.configService.get<string>('SMTP_HOST', ''),
+      port: this.configService.get<number>('SMTP_PORT', 587),
+      secure: this.configService.get<string>('SMTP_SECURE', 'false') === 'true',
+      auth: {
+        user: this.configService.get<string>('SMTP_USER', ''),
+        pass: this.configService.get<string>('SMTP_PASS', ''),
+      },
+    });
+  }
+
+  async sendMail(options: {
+    to: string;
+    subject: string;
+    body: string;
+    attachments?: { filename: string; content: Buffer }[];
+  }): Promise<void> {
+    const from = this.configService.get<string>('SMTP_FROM', 'paperless@localhost');
+
+    await this.transporter.sendMail({
+      from,
+      to: options.to,
+      subject: options.subject,
+      text: options.body,
+      attachments: options.attachments?.map(a => ({
+        filename: a.filename,
+        content: a.content,
+      })),
+    });
+
+    this.logger.log(`Mail gesendet an ${options.to}: "${options.subject}"`);
+  }
+}