feat: implement segment-based PDF download functionality with a dedicated UI for multi-page export

2026-05-06 09:46:23 +02:00
parent e08a5697f0
commit 415f8bbcf3
5 changed files with 162 additions and 29 deletions
@@ -15,7 +15,7 @@ import {
  type InboxSource,
 } from '../database/entities/inbox-document.entity';
 import { MailService } from '../postprocessing/mail.service';
-import { applyEditsToTemp, cleanupTemp } from '../inbox-postprocessor/edit-applier';
+import { applyEditsToTemp, cleanupTemp, buildSegmentBuffer } from '../inbox-postprocessor/edit-applier';

 export interface InboxFile {
  id: string;
@@ -253,19 +253,16 @@ export class InboxService {
    return this.barcodeScanner.scanRegion(doc, pdfPath, page, x, y, w, h);
  }

-  async getEditedPdfBuffer(
+  async getSegmentPdfBuffer(
    id: string,
    preferredUsername: string | null,
+    pages: number[],
  ): Promise<{ buffer: Buffer; filename: string }> {
    const { doc, pdfPath } = await this.resolveDocument(id, preferredUsername);
-    let tmpPath: string | null = null;
-    try {
-      tmpPath = await applyEditsToTemp(doc, pdfPath);
-      const buffer = await fs.readFile(tmpPath);
-      return { buffer, filename: doc.OriginalName };
-    } finally {
-      await cleanupTemp(tmpPath);
-    }
+    const deleted = new Set(doc.DeletedPages ?? []);
+    const safePages = pages.filter((p) => p >= 1 && p <= doc.PageCount && !deleted.has(p));
+    const buffer = await buildSegmentBuffer(doc, pdfPath, safePages);
+    return { buffer, filename: doc.OriginalName };
  }

  async sendAsEmail(