Fix pdf generation and parsing
This commit is contained in:
Sosthene
parent
2270051f1c
commit
6cbce160f3
@ -1,6 +1,8 @@
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import { saveAs } from 'file-saver';
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import { saveAs } from 'file-saver';
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import { PDFDocument, rgb, StandardFonts } from 'pdf-lib';
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import { PDFDocument, rgb, StandardFonts } from 'pdf-lib';
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const separator = '\x1f';
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export interface CustomerInfo {
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export interface CustomerInfo {
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firstName: string;
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firstName: string;
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lastName: string;
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lastName: string;
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@ -185,50 +187,17 @@ export default class PdfService {
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});
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});
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y -= lineSpacing;
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y -= lineSpacing;
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// Document Hash Section
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const keywords = [
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page.drawText('Intégrité du Document', {
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certificateData.documentHash,
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x: leftMargin,
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certificateData.metadata.commitmentId,
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y: y,
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JSON.stringify(certificateData.metadata.merkleProof)
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size: 12,
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];
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font: helveticaBoldFont,
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pdfDoc.setKeywords([keywords.join(separator)]);
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color: rgb(0, 0, 0)
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});
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y -= lineSpacing;
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// Add verification data as base64
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const verificationData = {
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documentHash: certificateData.documentHash,
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commitmentId: certificateData.metadata.commitmentId,
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merkleProof: certificateData.metadata.merkleProof || "N/A"
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};
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const verificationDataBase64 = btoa(JSON.stringify(verificationData));
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// Calculate proper chunk size based on available width and font size
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const availableWidth = width - (2 * leftMargin) - 20; // Full width minus margins and safety buffer
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const fontSize = 12;
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// Use a typical base64 character for width calculation
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const avgCharWidth = helveticaFont.widthOfTextAtSize('A', fontSize);
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const charsPerLine = Math.floor(availableWidth / avgCharWidth);
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const chunkSize = Math.max(60, Math.min(100, charsPerLine)); // More conservative limits
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const chunks = [];
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for (let j = 0; j < verificationDataBase64.length; j += chunkSize) {
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chunks.push(verificationDataBase64.slice(j, j + chunkSize));
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}
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chunks.forEach((chunk, index) => {
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page.drawText(chunk, {
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x: leftMargin,
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y: y - (index * 12), // Increased line spacing
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size: fontSize,
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font: helveticaFont,
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color: rgb(0, 0, 0)
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});
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});
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// Add explanatory text about certificate usage
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// Add explanatory text about certificate usage
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y -= (chunks.length * 12) + 40; // Space after verification data
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const explanatoryText = "Ce certificat doit être utilisé avec le document qu'il certifie pour être vérifié sur la page dédiée. Le document correspondant à ce certificat doit être téléchargé depuis LeCoffre et peut être conservé avec le certificat tant qu'il n'est pas modifié.";
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const explanatoryText = "Ce certificat doit être utilisé avec le document qu'il certifie pour être vérifié sur la page dédiée. Le document correspondant à ce certificat doit être téléchargé depuis LeCoffre et peut être conservé avec le certificat tant qu'il n'est pas modifié.";
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const explanatoryLines = this.splitTextToFit(helveticaObliqueFont, explanatoryText, width - (2 * leftMargin), 11);
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const explanatoryLines = this.splitTextToFit(helveticaObliqueFont, explanatoryText, width - (2 * leftMargin), 11);
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y -= (explanatoryLines.length * 12) + 40; // Space after verification data
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explanatoryLines.forEach((line, index) => {
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explanatoryLines.forEach((line, index) => {
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page.drawText(line, {
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page.drawText(line, {
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x: leftMargin,
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x: leftMargin,
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@ -322,314 +291,47 @@ export default class PdfService {
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}
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}
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}
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}
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/**
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* Generate certificate for notary documents
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* @param certificateData - Data needed for the certificate
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* @returns Promise<Blob> - The generated PDF as a blob
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*/
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public async generateNotaryCertificate(certificateData: CertificateData): Promise<Blob> {
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try {
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// Create a new PDF document
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const pdfDoc = await PDFDocument.create();
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const page = pdfDoc.addPage([595, 842]); // A4 size
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const { width, height } = page.getSize();
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// Embed the standard font
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const helveticaFont = await pdfDoc.embedFont(StandardFonts.Helvetica);
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const helveticaBoldFont = await pdfDoc.embedFont(StandardFonts.HelveticaBold);
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const helveticaObliqueFont = await pdfDoc.embedFont(StandardFonts.HelveticaOblique);
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// Notary Information Section (Top Left)
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page.drawText('Notaire Validateur:', {
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x: 20,
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y: height - 30,
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size: 12,
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font: helveticaBoldFont,
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color: rgb(0, 0, 0)
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});
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page.drawText(certificateData.notary.name, {
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x: 20,
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y: height - 37,
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size: 12,
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font: helveticaFont,
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color: rgb(0, 0, 0)
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});
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// Customer Information Section (Top Right)
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page.drawText('Fournisseur de Document:', {
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x: 120,
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y: height - 30,
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size: 12,
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font: helveticaBoldFont,
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color: rgb(0, 0, 0)
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});
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page.drawText(`${certificateData.customer.firstName} ${certificateData.customer.lastName}`, {
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x: 120,
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y: height - 37,
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size: 12,
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font: helveticaFont,
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color: rgb(0, 0, 0)
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});
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page.drawText(certificateData.customer.email, {
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x: 120,
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y: height - 44,
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size: 12,
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font: helveticaFont,
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color: rgb(0, 0, 0)
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});
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page.drawText(certificateData.customer.postalAddress, {
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x: 120,
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y: height - 51,
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size: 12,
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font: helveticaFont,
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color: rgb(0, 0, 0)
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});
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// Centered Title
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const titleText = 'Certificat Notarial de Validation de Document';
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const titleWidth = helveticaBoldFont.widthOfTextAtSize(titleText, 20);
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page.drawText(titleText, {
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x: (width - titleWidth) / 2,
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y: height - 80,
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size: 20,
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font: helveticaBoldFont,
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color: rgb(0, 0, 0)
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});
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// Add a line separator
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page.drawLine({
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start: { x: 20, y: height - 90 },
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end: { x: width - 20, y: height - 90 },
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thickness: 0.5,
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color: rgb(0, 0, 0)
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});
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let yPosition = height - 110;
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// Document Information Section
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page.drawText('Informations du Document', {
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x: 20,
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y: yPosition,
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size: 12,
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font: helveticaBoldFont,
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color: rgb(0, 0, 0)
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});
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yPosition -= 10;
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page.drawText(`Identifiant du Document: ${certificateData.metadata.documentUid}`, {
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x: 20,
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y: yPosition,
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size: 12,
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font: helveticaFont,
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color: rgb(0, 0, 0)
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});
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yPosition -= 7;
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page.drawText(`Type de Document: ${certificateData.metadata.documentType}`, {
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x: 20,
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y: yPosition,
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size: 12,
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font: helveticaFont,
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color: rgb(0, 0, 0)
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});
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yPosition -= 7;
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page.drawText(`Numéro de dossier: ${certificateData.folderUid}`, {
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x: 20,
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y: yPosition,
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size: 12,
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font: helveticaFont,
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color: rgb(0, 0, 0)
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});
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yPosition -= 7;
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page.drawText(`Créé le: ${certificateData.metadata.createdAt.toLocaleDateString('fr-FR')}`, {
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x: 20,
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y: yPosition,
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size: 12,
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font: helveticaFont,
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color: rgb(0, 0, 0)
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});
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yPosition -= 7;
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page.drawText(`Nom du fichier: ${certificateData.metadata.fileName}`, {
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x: 20,
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y: yPosition,
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size: 12,
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font: helveticaFont,
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color: rgb(0, 0, 0)
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});
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yPosition -= 7;
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page.drawText(`ID de transaction: ${certificateData.metadata.commitmentId}`, {
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x: 20,
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y: yPosition,
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size: 12,
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font: helveticaFont,
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color: rgb(0, 0, 0)
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});
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yPosition -= 7;
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page.drawText(`Dernière modification: ${certificateData.metadata.updatedAt.toLocaleDateString('fr-FR')}`, {
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x: 20,
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y: yPosition,
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size: 12,
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font: helveticaFont,
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color: rgb(0, 0, 0)
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});
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yPosition -= 7;
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page.drawText(`Statut: ${certificateData.metadata.isDeleted ? 'Supprimé' : 'Actif'}`, {
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x: 20,
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y: yPosition,
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size: 12,
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font: helveticaFont,
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color: rgb(0, 0, 0)
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});
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yPosition -= 15;
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// Document Hash Section
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page.drawText('Intégrité du Document', {
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x: 20,
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y: yPosition,
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size: 12,
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font: helveticaBoldFont,
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color: rgb(0, 0, 0)
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});
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yPosition -= 10;
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page.drawText(`Hash SHA256 du Document:`, {
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x: 20,
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y: yPosition,
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size: 12,
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font: helveticaFont,
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color: rgb(0, 0, 0)
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});
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yPosition -= 7;
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// Split hash into multiple lines if needed
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const hash = certificateData.documentHash;
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const maxWidth = 170; // Available width for text
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const hashLines = this.splitTextToFit(helveticaFont, hash, maxWidth, 12);
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for (const line of hashLines) {
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page.drawText(line, {
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x: 25,
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y: yPosition,
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size: 12,
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font: helveticaFont,
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color: rgb(0, 0, 0)
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});
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yPosition -= 7;
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}
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yPosition -= 8; // Extra space after hash
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yPosition -= 5;
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// Footer
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const footerText1 = `Page 1 sur 1`;
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const footerText2 = `Certificat Notarial - Généré le ${new Date().toLocaleString('fr-FR')}`;
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const footerWidth1 = helveticaObliqueFont.widthOfTextAtSize(footerText1, 10);
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const footerWidth2 = helveticaObliqueFont.widthOfTextAtSize(footerText2, 10);
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page.drawText(footerText1, {
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x: (width - footerWidth1) / 2,
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y: 30,
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size: 10,
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font: helveticaObliqueFont,
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color: rgb(0, 0, 0)
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});
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page.drawText(footerText2, {
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x: (width - footerWidth2) / 2,
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y: 25,
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size: 10,
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font: helveticaObliqueFont,
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color: rgb(0, 0, 0)
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});
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// Add verification data as base64 in small font
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const verificationData = {
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documentHash: certificateData.documentHash,
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commitmentId: certificateData.metadata.commitmentId,
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merkleProof: certificateData.metadata.merkleProof || "N/A"
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};
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const verificationDataBase64 = btoa(JSON.stringify(verificationData));
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// Split into chunks if too long
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const chunkSize = 80;
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const chunks = [];
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for (let j = 0; j < verificationDataBase64.length; j += chunkSize) {
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chunks.push(verificationDataBase64.slice(j, j + chunkSize));
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}
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chunks.forEach((chunk, index) => {
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page.drawText(chunk, {
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x: 20,
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y: 15 - (index * 3),
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size: 6,
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font: helveticaFont,
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color: rgb(0, 0, 0)
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});
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});
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// Save the PDF
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const pdfBytes = await pdfDoc.save();
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return new Blob([pdfBytes], { type: 'application/pdf' });
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} catch (error) {
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console.error('Error generating notary certificate:', error);
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throw new Error('Failed to generate notary certificate');
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}
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}
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/**
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* Download a notary certificate PDF
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* @param certificateData - Data needed for the certificate
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* @param filename - Optional filename for the download
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*/
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public async downloadNotaryCertificate(certificateData: CertificateData, filename?: string): Promise<void> {
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try {
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const pdfBlob = await this.generateNotaryCertificate(certificateData);
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const defaultFilename = `notary_certificate_${certificateData.metadata.documentUid}_${new Date().toISOString().split('T')[0]}.pdf`;
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saveAs(pdfBlob, filename || defaultFilename);
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} catch (error) {
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console.error('Error downloading notary certificate:', error);
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throw error;
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}
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}
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/**
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/**
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* Parse a PDF certificate and extract document information
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* Parse a PDF certificate and extract document information
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* @param pdfBlob - The PDF file as a blob
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* @param pdfBlob - The PDF file as a blob
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* @returns Promise<{documentHash: string, documentUid: string, commitmentId: string, merkleProof?: string}> - Extracted information
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* @returns Promise<{documentHash: string, documentUid: string, commitmentId: string, merkleProof?: string}> - Extracted information
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*/
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*/
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public async parseCertificate(pdfBlob: Blob): Promise<{documentHash: string, documentUid: string, commitmentId: string, merkleProof?: string}> {
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public async parseCertificate(certificateFile: File): Promise<{documentHash: string, commitmentId: string, merkleProof: any}> {
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return new Promise((resolve, reject) => {
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return new Promise((resolve, reject) => {
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const fileReader = new FileReader();
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const fileReader = new FileReader();
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console.log("certificateFile", certificateFile);
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fileReader.onload = async () => {
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fileReader.onload = async () => {
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try {
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try {
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// Convert PDF to text using browser's PDF capabilities
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// Read the metadata and get the validation data from the keywords
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const arrayBuffer = fileReader.result as ArrayBuffer;
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const pdfDoc = await PDFDocument.load(await certificateFile.arrayBuffer());
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const pdfData = new Uint8Array(arrayBuffer);
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const keywords = pdfDoc.getKeywords()?.split(separator);
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console.log("PDF data:", pdfData);
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if (!keywords) {
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// Use a simple text extraction approach
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throw new Error("No keywords found in certificate");
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// This is a basic implementation - for production, consider using pdfjs-dist
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const text = await this.extractTextFromPdf(pdfData);
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// Parse the extracted text to find our certificate data
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const parsedData = this.parseCertificateText(text);
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if (!parsedData.documentHash) {
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||||||
throw new Error('Document hash not found in certificate');
|
|
||||||
}
|
}
|
||||||
|
|
||||||
resolve(parsedData);
|
console.log(keywords);
|
||||||
|
|
||||||
|
if (keywords.length !== 3) {
|
||||||
|
throw new Error("Invalid keywords found in certificate");
|
||||||
|
}
|
||||||
|
|
||||||
|
const documentHash = keywords[0];
|
||||||
|
const commitmentId = keywords[1];
|
||||||
|
const merkleProof = keywords[2];
|
||||||
|
|
||||||
|
if (!documentHash || !commitmentId || !merkleProof) {
|
||||||
|
throw new Error("Invalid keywords found in certificate");
|
||||||
|
}
|
||||||
|
|
||||||
|
console.log("documentHash", documentHash);
|
||||||
|
console.log("commitmentId", commitmentId);
|
||||||
|
console.log("merkleProof", merkleProof);
|
||||||
|
|
||||||
|
|
||||||
|
resolve({ documentHash, commitmentId, merkleProof });
|
||||||
} catch (error) {
|
} catch (error) {
|
||||||
reject(error);
|
reject(error);
|
||||||
}
|
}
|
||||||
@ -637,105 +339,9 @@ export default class PdfService {
|
|||||||
|
|
||||||
fileReader.onerror = () => {
|
fileReader.onerror = () => {
|
||||||
reject(new Error('Failed to read PDF file'));
|
reject(new Error('Failed to read PDF file'));
|
||||||
};
|
};
|
||||||
|
|
||||||
fileReader.readAsArrayBuffer(pdfBlob);
|
fileReader.readAsArrayBuffer(certificateFile);
|
||||||
});
|
});
|
||||||
}
|
}
|
||||||
|
|
||||||
/**
|
|
||||||
* Extract text from PDF using browser capabilities
|
|
||||||
* @param pdfData - PDF data as Uint8Array
|
|
||||||
* @returns Promise<string> - Extracted text
|
|
||||||
*/
|
|
||||||
private async extractTextFromPdf(pdfData: Uint8Array): Promise<string> {
|
|
||||||
console.log("extractTextFromPdf");
|
|
||||||
|
|
||||||
// Convert PDF data to string to search for base64 patterns
|
|
||||||
const pdfString = new TextDecoder('utf-8').decode(pdfData);
|
|
||||||
|
|
||||||
// Look for base64 patterns in the PDF content
|
|
||||||
// This is a simple approach that should work for our embedded data
|
|
||||||
const base64Matches = pdfString.match(/([A-Za-z0-9+/]{80,}={0,2})/g);
|
|
||||||
|
|
||||||
if (base64Matches && base64Matches.length > 0) {
|
|
||||||
console.log('Found base64 patterns in PDF:', base64Matches.length);
|
|
||||||
// Return the longest base64 string (most likely our verification data)
|
|
||||||
const longestBase64 = base64Matches.reduce((a, b) => a.length > b.length ? a : b);
|
|
||||||
return longestBase64;
|
|
||||||
}
|
|
||||||
|
|
||||||
// If no base64 found, return empty string
|
|
||||||
console.log('No base64 patterns found in PDF');
|
|
||||||
return '';
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* Parse certificate text to extract specific fields
|
|
||||||
* @param text - Extracted text from PDF (could be base64 or regular text)
|
|
||||||
* @returns Parsed certificate data
|
|
||||||
*/
|
|
||||||
private parseCertificateText(text: string): {documentHash: string, documentUid: string, commitmentId: string, merkleProof?: string} {
|
|
||||||
const result = {
|
|
||||||
documentHash: '',
|
|
||||||
documentUid: '',
|
|
||||||
commitmentId: '',
|
|
||||||
merkleProof: undefined as string | undefined
|
|
||||||
};
|
|
||||||
|
|
||||||
// Check if the text is a base64 string (our new format)
|
|
||||||
if (text.match(/^[A-Za-z0-9+/]+={0,2}$/)) {
|
|
||||||
try {
|
|
||||||
console.log('Attempting to decode base64 data:', text.substring(0, 50) + '...');
|
|
||||||
const decodedData = atob(text);
|
|
||||||
const verificationData = JSON.parse(decodedData);
|
|
||||||
|
|
||||||
console.log('Successfully decoded verification data:', verificationData);
|
|
||||||
|
|
||||||
if (verificationData.documentHash) {
|
|
||||||
result.documentHash = verificationData.documentHash;
|
|
||||||
}
|
|
||||||
if (verificationData.commitmentId) {
|
|
||||||
result.commitmentId = verificationData.commitmentId;
|
|
||||||
}
|
|
||||||
if (verificationData.merkleProof && verificationData.merkleProof !== "N/A") {
|
|
||||||
result.merkleProof = verificationData.merkleProof;
|
|
||||||
}
|
|
||||||
|
|
||||||
// If we successfully extracted data from base64, return early
|
|
||||||
if (result.documentHash) {
|
|
||||||
return result;
|
|
||||||
}
|
|
||||||
} catch (error) {
|
|
||||||
console.log('Failed to decode base64 data:', error);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
// Fallback to text parsing for older certificates
|
|
||||||
// Extract document hash (64 character hex string)
|
|
||||||
const hashMatch = text.match(/Hash SHA256 du Document:\s*([a-fA-F0-9]{64})/);
|
|
||||||
if (hashMatch && hashMatch[1]) {
|
|
||||||
result.documentHash = hashMatch[1];
|
|
||||||
}
|
|
||||||
|
|
||||||
// Extract document UID
|
|
||||||
const uidMatch = text.match(/UID du Document:\s*([^\n\r]+)/);
|
|
||||||
if (uidMatch && uidMatch[1]) {
|
|
||||||
result.documentUid = uidMatch[1].trim();
|
|
||||||
}
|
|
||||||
|
|
||||||
// Extract commitment ID
|
|
||||||
const commitmentMatch = text.match(/ID de transaction:\s*([^\n\r]+)/);
|
|
||||||
if (commitmentMatch && commitmentMatch[1]) {
|
|
||||||
result.commitmentId = commitmentMatch[1].trim();
|
|
||||||
}
|
|
||||||
|
|
||||||
// Extract merkle proof
|
|
||||||
const merkleProofMatch = text.match(/Preuve Merkle \(Blockchain\):\s*([^\n\r]+)/);
|
|
||||||
if (merkleProofMatch && merkleProofMatch[1]) {
|
|
||||||
result.merkleProof = merkleProofMatch[1].trim();
|
|
||||||
}
|
|
||||||
|
|
||||||
return result;
|
|
||||||
}
|
|
||||||
}
|
}
|
||||||
|
|||||||
Loading…
x
Reference in New Issue
Block a user