Initial commit with Email Import Wizard and Task Processor updates

paperless-backend/src/inbox-postprocessor/edit-applier.ts

@@ -0,0 +1,70 @@
+import * as fs from 'fs/promises';
+import * as os from 'os';
+import * as path from 'path';
+import { PDFDocument, degrees } from 'pdf-lib';
+import type { InboxDocument } from '../database/entities/inbox-document.entity';
+
+/**
+ * Wendet die virtuellen Edits (DeletedPages, Rotations) auf das Original-PDF an
+ * und schreibt das Ergebnis in eine temporäre Datei. Gibt den Pfad zurück.
+ * Aufrufer ist verantwortlich für das Aufräumen.
+ */
+export async function applyEditsToTemp(
+  doc: InboxDocument,
+  pdfPath: string,
+): Promise<string> {
+  const bytes = await fs.readFile(pdfPath);
+  const pdf = await PDFDocument.load(bytes, { ignoreEncryption: true });
+
+  const rotations = doc.Rotations ?? {};
+  for (const [pageStr, rot] of Object.entries(rotations)) {
+    const pageNum = Number(pageStr);
+    if (!Number.isInteger(pageNum)) continue;
+    const idx = pageNum - 1;
+    if (idx < 0 || idx >= pdf.getPageCount()) continue;
+    const normalized = ((Math.round(rot / 90) * 90) % 360 + 360) % 360;
+    if (normalized === 0) continue;
+    pdf.getPage(idx).setRotation(degrees(normalized));
+  }
+
+  // Seiten in absteigender Reihenfolge entfernen, damit Indizes stabil bleiben
+  const deleted = [...(doc.DeletedPages ?? [])].sort((a, b) => b - a);
+  for (const pageNum of deleted) {
+    const idx = pageNum - 1;
+    if (idx < 0 || idx >= pdf.getPageCount()) continue;
+    pdf.removePage(idx);
+  }
+
+  const out = await pdf.save();
+
+  const tmpDir = await fs.mkdtemp(path.join(os.tmpdir(), 'inbox-pp-'));
+  const tmpPath = path.join(tmpDir, 'document.pdf');
+  await fs.writeFile(tmpPath, out);
+  return tmpPath;
+}
+
+export async function cleanupTemp(filePath: string | null): Promise<void> {
+  if (!filePath) return;
+  try {
+    await fs.unlink(filePath);
+    await fs.rmdir(path.dirname(filePath)).catch(() => undefined);
+  } catch {
+    // ignore
+  }
+}
+
+export async function extractSectionToTemp(
+  pdfPath: string,
+  pageIndices: number[],
+): Promise<string> {
+  const bytes = await fs.readFile(pdfPath);
+  const srcPdf = await PDFDocument.load(bytes, { ignoreEncryption: true });
+  const outPdf = await PDFDocument.create();
+  const copied = await outPdf.copyPages(srcPdf, pageIndices);
+  copied.forEach(p => outPdf.addPage(p));
+  const out = await outPdf.save();
+  const tmpDir = await fs.mkdtemp(path.join(os.tmpdir(), 'inbox-section-'));
+  const tmpPath = path.join(tmpDir, 'section.pdf');
+  await fs.writeFile(tmpPath, out);
+  return tmpPath;
+}