Fix pdf generation and parsing
This commit is contained in:
Sosthene
parent
2270051f1c
commit
6cbce160f3
@ -1,6 +1,8 @@
|
||||
import { saveAs } from 'file-saver';
|
||||
import { PDFDocument, rgb, StandardFonts } from 'pdf-lib';
|
||||
|
||||
const separator = '\x1f';
|
||||
|
||||
export interface CustomerInfo {
|
||||
firstName: string;
|
||||
lastName: string;
|
||||
@ -185,50 +187,17 @@ export default class PdfService {
|
||||
});
|
||||
y -= lineSpacing;
|
||||
|
||||
// Document Hash Section
|
||||
page.drawText('Intégrité du Document', {
|
||||
x: leftMargin,
|
||||
y: y,
|
||||
size: 12,
|
||||
font: helveticaBoldFont,
|
||||
color: rgb(0, 0, 0)
|
||||
});
|
||||
y -= lineSpacing;
|
||||
|
||||
// Add verification data as base64
|
||||
const verificationData = {
|
||||
documentHash: certificateData.documentHash,
|
||||
commitmentId: certificateData.metadata.commitmentId,
|
||||
merkleProof: certificateData.metadata.merkleProof || "N/A"
|
||||
};
|
||||
const verificationDataBase64 = btoa(JSON.stringify(verificationData));
|
||||
|
||||
// Calculate proper chunk size based on available width and font size
|
||||
const availableWidth = width - (2 * leftMargin) - 20; // Full width minus margins and safety buffer
|
||||
const fontSize = 12;
|
||||
// Use a typical base64 character for width calculation
|
||||
const avgCharWidth = helveticaFont.widthOfTextAtSize('A', fontSize);
|
||||
const charsPerLine = Math.floor(availableWidth / avgCharWidth);
|
||||
const chunkSize = Math.max(60, Math.min(100, charsPerLine)); // More conservative limits
|
||||
|
||||
const chunks = [];
|
||||
for (let j = 0; j < verificationDataBase64.length; j += chunkSize) {
|
||||
chunks.push(verificationDataBase64.slice(j, j + chunkSize));
|
||||
}
|
||||
chunks.forEach((chunk, index) => {
|
||||
page.drawText(chunk, {
|
||||
x: leftMargin,
|
||||
y: y - (index * 12), // Increased line spacing
|
||||
size: fontSize,
|
||||
font: helveticaFont,
|
||||
color: rgb(0, 0, 0)
|
||||
});
|
||||
});
|
||||
const keywords = [
|
||||
certificateData.documentHash,
|
||||
certificateData.metadata.commitmentId,
|
||||
JSON.stringify(certificateData.metadata.merkleProof)
|
||||
];
|
||||
pdfDoc.setKeywords([keywords.join(separator)]);
|
||||
|
||||
// Add explanatory text about certificate usage
|
||||
y -= (chunks.length * 12) + 40; // Space after verification data
|
||||
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.";
|
||||
const explanatoryLines = this.splitTextToFit(helveticaObliqueFont, explanatoryText, width - (2 * leftMargin), 11);
|
||||
y -= (explanatoryLines.length * 12) + 40; // Space after verification data
|
||||
explanatoryLines.forEach((line, index) => {
|
||||
page.drawText(line, {
|
||||
x: leftMargin,
|
||||
@ -322,314 +291,47 @@ export default class PdfService {
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Generate certificate for notary documents
|
||||
* @param certificateData - Data needed for the certificate
|
||||
* @returns Promise<Blob> - The generated PDF as a blob
|
||||
*/
|
||||
public async generateNotaryCertificate(certificateData: CertificateData): Promise<Blob> {
|
||||
try {
|
||||
// Create a new PDF document
|
||||
const pdfDoc = await PDFDocument.create();
|
||||
const page = pdfDoc.addPage([595, 842]); // A4 size
|
||||
const { width, height } = page.getSize();
|
||||
|
||||
// Embed the standard font
|
||||
const helveticaFont = await pdfDoc.embedFont(StandardFonts.Helvetica);
|
||||
const helveticaBoldFont = await pdfDoc.embedFont(StandardFonts.HelveticaBold);
|
||||
const helveticaObliqueFont = await pdfDoc.embedFont(StandardFonts.HelveticaOblique);
|
||||
|
||||
// Notary Information Section (Top Left)
|
||||
page.drawText('Notaire Validateur:', {
|
||||
x: 20,
|
||||
y: height - 30,
|
||||
size: 12,
|
||||
font: helveticaBoldFont,
|
||||
color: rgb(0, 0, 0)
|
||||
});
|
||||
|
||||
page.drawText(certificateData.notary.name, {
|
||||
x: 20,
|
||||
y: height - 37,
|
||||
size: 12,
|
||||
font: helveticaFont,
|
||||
color: rgb(0, 0, 0)
|
||||
});
|
||||
|
||||
// Customer Information Section (Top Right)
|
||||
page.drawText('Fournisseur de Document:', {
|
||||
x: 120,
|
||||
y: height - 30,
|
||||
size: 12,
|
||||
font: helveticaBoldFont,
|
||||
color: rgb(0, 0, 0)
|
||||
});
|
||||
|
||||
page.drawText(`${certificateData.customer.firstName} ${certificateData.customer.lastName}`, {
|
||||
x: 120,
|
||||
y: height - 37,
|
||||
size: 12,
|
||||
font: helveticaFont,
|
||||
color: rgb(0, 0, 0)
|
||||
});
|
||||
|
||||
page.drawText(certificateData.customer.email, {
|
||||
x: 120,
|
||||
y: height - 44,
|
||||
size: 12,
|
||||
font: helveticaFont,
|
||||
color: rgb(0, 0, 0)
|
||||
});
|
||||
|
||||
page.drawText(certificateData.customer.postalAddress, {
|
||||
x: 120,
|
||||
y: height - 51,
|
||||
size: 12,
|
||||
font: helveticaFont,
|
||||
color: rgb(0, 0, 0)
|
||||
});
|
||||
|
||||
// Centered Title
|
||||
const titleText = 'Certificat Notarial de Validation de Document';
|
||||
const titleWidth = helveticaBoldFont.widthOfTextAtSize(titleText, 20);
|
||||
page.drawText(titleText, {
|
||||
x: (width - titleWidth) / 2,
|
||||
y: height - 80,
|
||||
size: 20,
|
||||
font: helveticaBoldFont,
|
||||
color: rgb(0, 0, 0)
|
||||
});
|
||||
|
||||
// Add a line separator
|
||||
page.drawLine({
|
||||
start: { x: 20, y: height - 90 },
|
||||
end: { x: width - 20, y: height - 90 },
|
||||
thickness: 0.5,
|
||||
color: rgb(0, 0, 0)
|
||||
});
|
||||
|
||||
let yPosition = height - 110;
|
||||
|
||||
// Document Information Section
|
||||
page.drawText('Informations du Document', {
|
||||
x: 20,
|
||||
y: yPosition,
|
||||
size: 12,
|
||||
font: helveticaBoldFont,
|
||||
color: rgb(0, 0, 0)
|
||||
});
|
||||
yPosition -= 10;
|
||||
|
||||
page.drawText(`Identifiant du Document: ${certificateData.metadata.documentUid}`, {
|
||||
x: 20,
|
||||
y: yPosition,
|
||||
size: 12,
|
||||
font: helveticaFont,
|
||||
color: rgb(0, 0, 0)
|
||||
});
|
||||
yPosition -= 7;
|
||||
|
||||
page.drawText(`Type de Document: ${certificateData.metadata.documentType}`, {
|
||||
x: 20,
|
||||
y: yPosition,
|
||||
size: 12,
|
||||
font: helveticaFont,
|
||||
color: rgb(0, 0, 0)
|
||||
});
|
||||
yPosition -= 7;
|
||||
|
||||
page.drawText(`Numéro de dossier: ${certificateData.folderUid}`, {
|
||||
x: 20,
|
||||
y: yPosition,
|
||||
size: 12,
|
||||
font: helveticaFont,
|
||||
color: rgb(0, 0, 0)
|
||||
});
|
||||
yPosition -= 7;
|
||||
|
||||
page.drawText(`Créé le: ${certificateData.metadata.createdAt.toLocaleDateString('fr-FR')}`, {
|
||||
x: 20,
|
||||
y: yPosition,
|
||||
size: 12,
|
||||
font: helveticaFont,
|
||||
color: rgb(0, 0, 0)
|
||||
});
|
||||
yPosition -= 7;
|
||||
|
||||
page.drawText(`Nom du fichier: ${certificateData.metadata.fileName}`, {
|
||||
x: 20,
|
||||
y: yPosition,
|
||||
size: 12,
|
||||
font: helveticaFont,
|
||||
color: rgb(0, 0, 0)
|
||||
});
|
||||
yPosition -= 7;
|
||||
|
||||
page.drawText(`ID de transaction: ${certificateData.metadata.commitmentId}`, {
|
||||
x: 20,
|
||||
y: yPosition,
|
||||
size: 12,
|
||||
font: helveticaFont,
|
||||
color: rgb(0, 0, 0)
|
||||
});
|
||||
yPosition -= 7;
|
||||
|
||||
page.drawText(`Dernière modification: ${certificateData.metadata.updatedAt.toLocaleDateString('fr-FR')}`, {
|
||||
x: 20,
|
||||
y: yPosition,
|
||||
size: 12,
|
||||
font: helveticaFont,
|
||||
color: rgb(0, 0, 0)
|
||||
});
|
||||
yPosition -= 7;
|
||||
|
||||
page.drawText(`Statut: ${certificateData.metadata.isDeleted ? 'Supprimé' : 'Actif'}`, {
|
||||
x: 20,
|
||||
y: yPosition,
|
||||
size: 12,
|
||||
font: helveticaFont,
|
||||
color: rgb(0, 0, 0)
|
||||
});
|
||||
yPosition -= 15;
|
||||
|
||||
// Document Hash Section
|
||||
page.drawText('Intégrité du Document', {
|
||||
x: 20,
|
||||
y: yPosition,
|
||||
size: 12,
|
||||
font: helveticaBoldFont,
|
||||
color: rgb(0, 0, 0)
|
||||
});
|
||||
yPosition -= 10;
|
||||
|
||||
page.drawText(`Hash SHA256 du Document:`, {
|
||||
x: 20,
|
||||
y: yPosition,
|
||||
size: 12,
|
||||
font: helveticaFont,
|
||||
color: rgb(0, 0, 0)
|
||||
});
|
||||
yPosition -= 7;
|
||||
|
||||
// Split hash into multiple lines if needed
|
||||
const hash = certificateData.documentHash;
|
||||
const maxWidth = 170; // Available width for text
|
||||
const hashLines = this.splitTextToFit(helveticaFont, hash, maxWidth, 12);
|
||||
|
||||
for (const line of hashLines) {
|
||||
page.drawText(line, {
|
||||
x: 25,
|
||||
y: yPosition,
|
||||
size: 12,
|
||||
font: helveticaFont,
|
||||
color: rgb(0, 0, 0)
|
||||
});
|
||||
yPosition -= 7;
|
||||
}
|
||||
yPosition -= 8; // Extra space after hash
|
||||
|
||||
yPosition -= 5;
|
||||
|
||||
// Footer
|
||||
const footerText1 = `Page 1 sur 1`;
|
||||
const footerText2 = `Certificat Notarial - Généré le ${new Date().toLocaleString('fr-FR')}`;
|
||||
const footerWidth1 = helveticaObliqueFont.widthOfTextAtSize(footerText1, 10);
|
||||
const footerWidth2 = helveticaObliqueFont.widthOfTextAtSize(footerText2, 10);
|
||||
|
||||
page.drawText(footerText1, {
|
||||
x: (width - footerWidth1) / 2,
|
||||
y: 30,
|
||||
size: 10,
|
||||
font: helveticaObliqueFont,
|
||||
color: rgb(0, 0, 0)
|
||||
});
|
||||
|
||||
page.drawText(footerText2, {
|
||||
x: (width - footerWidth2) / 2,
|
||||
y: 25,
|
||||
size: 10,
|
||||
font: helveticaObliqueFont,
|
||||
color: rgb(0, 0, 0)
|
||||
});
|
||||
|
||||
// Add verification data as base64 in small font
|
||||
const verificationData = {
|
||||
documentHash: certificateData.documentHash,
|
||||
commitmentId: certificateData.metadata.commitmentId,
|
||||
merkleProof: certificateData.metadata.merkleProof || "N/A"
|
||||
};
|
||||
const verificationDataBase64 = btoa(JSON.stringify(verificationData));
|
||||
|
||||
// Split into chunks if too long
|
||||
const chunkSize = 80;
|
||||
const chunks = [];
|
||||
for (let j = 0; j < verificationDataBase64.length; j += chunkSize) {
|
||||
chunks.push(verificationDataBase64.slice(j, j + chunkSize));
|
||||
}
|
||||
|
||||
chunks.forEach((chunk, index) => {
|
||||
page.drawText(chunk, {
|
||||
x: 20,
|
||||
y: 15 - (index * 3),
|
||||
size: 6,
|
||||
font: helveticaFont,
|
||||
color: rgb(0, 0, 0)
|
||||
});
|
||||
});
|
||||
|
||||
// Save the PDF
|
||||
const pdfBytes = await pdfDoc.save();
|
||||
return new Blob([pdfBytes], { type: 'application/pdf' });
|
||||
} catch (error) {
|
||||
console.error('Error generating notary certificate:', error);
|
||||
throw new Error('Failed to generate notary certificate');
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Download a notary certificate PDF
|
||||
* @param certificateData - Data needed for the certificate
|
||||
* @param filename - Optional filename for the download
|
||||
*/
|
||||
public async downloadNotaryCertificate(certificateData: CertificateData, filename?: string): Promise<void> {
|
||||
try {
|
||||
const pdfBlob = await this.generateNotaryCertificate(certificateData);
|
||||
const defaultFilename = `notary_certificate_${certificateData.metadata.documentUid}_${new Date().toISOString().split('T')[0]}.pdf`;
|
||||
saveAs(pdfBlob, filename || defaultFilename);
|
||||
} catch (error) {
|
||||
console.error('Error downloading notary certificate:', error);
|
||||
throw error;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Parse a PDF certificate and extract document information
|
||||
* @param pdfBlob - The PDF file as a blob
|
||||
* @returns Promise<{documentHash: string, documentUid: string, commitmentId: string, merkleProof?: string}> - Extracted information
|
||||
*/
|
||||
public async parseCertificate(pdfBlob: Blob): Promise<{documentHash: string, documentUid: string, commitmentId: string, merkleProof?: string}> {
|
||||
public async parseCertificate(certificateFile: File): Promise<{documentHash: string, commitmentId: string, merkleProof: any}> {
|
||||
return new Promise((resolve, reject) => {
|
||||
const fileReader = new FileReader();
|
||||
|
||||
console.log("certificateFile", certificateFile);
|
||||
|
||||
fileReader.onload = async () => {
|
||||
try {
|
||||
// Convert PDF to text using browser's PDF capabilities
|
||||
const arrayBuffer = fileReader.result as ArrayBuffer;
|
||||
const pdfData = new Uint8Array(arrayBuffer);
|
||||
console.log("PDF data:", pdfData);
|
||||
// Read the metadata and get the validation data from the keywords
|
||||
const pdfDoc = await PDFDocument.load(await certificateFile.arrayBuffer());
|
||||
const keywords = pdfDoc.getKeywords()?.split(separator);
|
||||
|
||||
// Use a simple text extraction approach
|
||||
// This is a basic implementation - for production, consider using pdfjs-dist
|
||||
const text = await this.extractTextFromPdf(pdfData);
|
||||
|
||||
// Parse the extracted text to find our certificate data
|
||||
const parsedData = this.parseCertificateText(text);
|
||||
|
||||
if (!parsedData.documentHash) {
|
||||
throw new Error('Document hash not found in certificate');
|
||||
if (!keywords) {
|
||||
throw new Error("No keywords 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) {
|
||||
reject(error);
|
||||
}
|
||||
@ -639,103 +341,7 @@ export default class PdfService {
|
||||
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