Initial commit with Email Import Wizard and Task Processor updates

2026-05-04 08:02:11 +02:00
commit effdc5d59f
170 changed files with 67739 additions and 0 deletions
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+import { Injectable, Logger } from '@nestjs/common';
+import sharp = require('sharp');
+import jsQR from 'jsqr';
+
+export interface QrCodeResult {
+  data: string;
+  location: {
+    x: number;
+    y: number;
+    width: number;
+    height: number;
+  };
+}
+
+@Injectable()
+export class QrCodeService {
+  private readonly logger = new Logger(QrCodeService.name);
+
+  /**
+   * Extrahiert ALLE QR-Codes aus einem Bild-Buffer (PNG/JPEG).
+   * jsQR findet nur einen Code pro Aufruf — daher iteratives Vorgehen:
+   * Code finden → Bereich weiß überdecken → erneut scannen, bis nichts mehr gefunden wird.
+   */
+  async extractFromImage(imageBuffer: Buffer): Promise<QrCodeResult[]> {
+    const results: QrCodeResult[] = [];
+    const seen = new Set<string>();
+    let currentBuffer = imageBuffer;
+    const MAX_PASSES = 10;
+
+    for (let pass = 0; pass < MAX_PASSES; pass++) {
+      const { data, info } = await sharp(currentBuffer)
+        .ensureAlpha()
+        .raw()
+        .toBuffer({ resolveWithObject: true });
+
+      const imageData = new Uint8ClampedArray(data.buffer);
+      const code = jsQR(imageData, info.width, info.height, {
+        inversionAttempts: 'attemptBoth',
+      });
+      if (!code) break;
+
+      const corners = [
+        code.location.topLeftCorner,
+        code.location.topRightCorner,
+        code.location.bottomLeftCorner,
+        code.location.bottomRightCorner,
+      ];
+      const xs = corners.map((c) => c.x);
+      const ys = corners.map((c) => c.y);
+      const minX = Math.floor(Math.min(...xs));
+      const minY = Math.floor(Math.min(...ys));
+      const maxX = Math.ceil(Math.max(...xs));
+      const maxY = Math.ceil(Math.max(...ys));
+      const width = Math.max(1, maxX - minX);
+      const height = Math.max(1, maxY - minY);
+
+      if (!seen.has(code.data)) {
+        seen.add(code.data);
+        results.push({
+          data: code.data,
+          location: { x: minX, y: minY, width, height },
+        });
+        this.logger.debug(`QR-Code erkannt (Pass ${pass + 1}): ${code.data}`);
+      }
+
+      // Erkannten Bereich mit weißem Rechteck (inkl. Padding) überdecken,
+      // damit jsQR im nächsten Pass den nächsten QR findet.
+      const pad = 12;
+      const maskX = Math.max(0, minX - pad);
+      const maskY = Math.max(0, minY - pad);
+      const maskW = Math.min(info.width - maskX, width + 2 * pad);
+      const maskH = Math.min(info.height - maskY, height + 2 * pad);
+      const svg = `<svg width="${info.width}" height="${info.height}" xmlns="http://www.w3.org/2000/svg"><rect x="${maskX}" y="${maskY}" width="${maskW}" height="${maskH}" fill="white"/></svg>`;
+      currentBuffer = await sharp(currentBuffer)
+        .composite([{ input: Buffer.from(svg), top: 0, left: 0 }])
+        .png()
+        .toBuffer();
+    }
+
+    return results;
+  }
+
+  /**
+   * Validiert ob der QR-Code-Inhalt dem erwarteten Schema entspricht.
+   * Schema: JSON mit X, Y, Jahr, Nummer, Eingangsdatum
+   */
+  parseBarcode(qrData: string): Record<string, any> | null {
+    try {
+      const parsed = JSON.parse(qrData);
+
+      if (parsed.Jahr !== undefined && parsed.Nummer !== undefined) {
+        return parsed;
+      }
+
+      this.logger.warn(`QR-Code-Daten passen nicht zum Schema: ${qrData}`);
+      return null;
+    } catch {
+      this.logger.debug(`QR-Code ist kein JSON: ${qrData}`);
+      return null;
+    }
+  }
+}