589 lines
33 KiB
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589 lines
33 KiB
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<h1><a href="../../index.html">All files</a> / <a href="index.html">src/services</a> fileExtract.ts</h1>
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<pre><table class="coverage">
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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">// Chargements dynamiques locaux (pdfjs-dist/tesseract.js)
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<span class="cstat-no" title="statement not covered" >let _pdfjsLib: any | null = null</span>
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<span class="cstat-no" title="statement not covered" >async function getPdfJs() {</span>
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<span class="cstat-no" title="statement not covered" > if (_pdfjsLib) return _pdfjsLib</span>
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<span class="cstat-no" title="statement not covered" > const pdfjsLib: any = await import('pdfjs-dist')</span>
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<span class="cstat-no" title="statement not covered" > try {</span>
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// Utilise un worker module réel pour éviter le fake worker
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<span class="cstat-no" title="statement not covered" > const workerUrl = new URL('pdfjs-dist/build/pdf.worker.min.mjs', import.meta.url)</span>
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<span class="cstat-no" title="statement not covered" > pdfjsLib.GlobalWorkerOptions.workerPort = new Worker(workerUrl, { type: 'module' })</span>
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<span class="cstat-no" title="statement not covered" > } catch {</span>
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// ignore si worker introuvable
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<span class="cstat-no" title="statement not covered" > }</span>
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<span class="cstat-no" title="statement not covered" > _pdfjsLib = pdfjsLib</span>
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<span class="cstat-no" title="statement not covered" > return _pdfjsLib</span>
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<span class="cstat-no" title="statement not covered" >}</span>
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<span class="cstat-no" title="statement not covered" >export async function extractTextFromFile(file: File): Promise<string> {</span>
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<span class="cstat-no" title="statement not covered" > const mime = file.type || ''</span>
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<span class="cstat-no" title="statement not covered" > if (mime.includes('pdf') || file.name.toLowerCase().endsWith('.pdf')) {</span>
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<span class="cstat-no" title="statement not covered" > const pdfText = await extractFromPdf(file)</span>
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<span class="cstat-no" title="statement not covered" > if (import.meta.env.DEV) {</span>
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// eslint-disable-next-line no-console
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<span class="cstat-no" title="statement not covered" > console.info('[OCR][PDF]', file.name, 'len=', pdfText.length, 'peek=', pdfText.slice(0, 200))</span>
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<span class="cstat-no" title="statement not covered" > }</span>
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<span class="cstat-no" title="statement not covered" > return pdfText</span>
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<span class="cstat-no" title="statement not covered" > }</span>
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<span class="cstat-no" title="statement not covered" > if (mime.startsWith('image/') || ['.png', '.jpg', '.jpeg'].some((ext) => file.name.toLowerCase().endsWith(ext))) {</span>
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<span class="cstat-no" title="statement not covered" > const imgText = await extractFromImage(file)</span>
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<span class="cstat-no" title="statement not covered" > if (import.meta.env.DEV) {</span>
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// eslint-disable-next-line no-console
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<span class="cstat-no" title="statement not covered" > console.info('[OCR][IMG]', file.name, 'len=', imgText.length, 'peek=', imgText.slice(0, 200))</span>
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<span class="cstat-no" title="statement not covered" > }</span>
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<span class="cstat-no" title="statement not covered" > return imgText</span>
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<span class="cstat-no" title="statement not covered" > }</span>
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// Fallback: lecture texte brut
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<span class="cstat-no" title="statement not covered" > try {</span>
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<span class="cstat-no" title="statement not covered" > return await file.text()</span>
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<span class="cstat-no" title="statement not covered" > } catch {</span>
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<span class="cstat-no" title="statement not covered" > return ''</span>
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<span class="cstat-no" title="statement not covered" > }</span>
|
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<span class="cstat-no" title="statement not covered" >}</span>
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|
|
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<span class="cstat-no" title="statement not covered" >async function extractFromPdf(file: File): Promise<string> {</span>
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<span class="cstat-no" title="statement not covered" > const pdfjsLib = await getPdfJs().catch(() => null)</span>
|
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<span class="cstat-no" title="statement not covered" > if (!pdfjsLib) return ''</span>
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<span class="cstat-no" title="statement not covered" > const arrayBuffer = await file.arrayBuffer()</span>
|
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<span class="cstat-no" title="statement not covered" > const pdf = await pdfjsLib.getDocument({ data: new Uint8Array(arrayBuffer) }).promise</span>
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<span class="cstat-no" title="statement not covered" > const texts: string[] = []</span>
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<span class="cstat-no" title="statement not covered" > const numPages = Math.min(pdf.numPages, 50)</span>
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<span class="cstat-no" title="statement not covered" > for (let i = 1; i <= numPages; i += 1) {</span>
|
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<span class="cstat-no" title="statement not covered" > const page = await pdf.getPage(i)</span>
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<span class="cstat-no" title="statement not covered" > const content = await page.getTextContent().catch(() => null)</span>
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<span class="cstat-no" title="statement not covered" > let pageText = ''</span>
|
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<span class="cstat-no" title="statement not covered" > if (content) {</span>
|
|
<span class="cstat-no" title="statement not covered" > pageText = content.items.map((it: any) => (it.str ? it.str : '')).join(' ')</span>
|
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<span class="cstat-no" title="statement not covered" > }</span>
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// Fallback OCR si pas de texte exploitable
|
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<span class="cstat-no" title="statement not covered" > if (!pageText || pageText.replace(/\s+/g, '').length < 30) {</span>
|
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<span class="cstat-no" title="statement not covered" > const viewport = page.getViewport({ scale: 2 })</span>
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<span class="cstat-no" title="statement not covered" > const canvas = document.createElement('canvas')</span>
|
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<span class="cstat-no" title="statement not covered" > canvas.width = viewport.width</span>
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<span class="cstat-no" title="statement not covered" > canvas.height = viewport.height</span>
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<span class="cstat-no" title="statement not covered" > const ctx = canvas.getContext('2d') as any</span>
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<span class="cstat-no" title="statement not covered" > await page.render({ canvasContext: ctx, viewport }).promise</span>
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<span class="cstat-no" title="statement not covered" > const blob: Blob = await new Promise((resolve) => canvas.toBlob((b) => resolve(b as Blob), 'image/png'))</span>
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<span class="cstat-no" title="statement not covered" > const ocrText = await extractFromImage(new File([blob], `${file.name}-p${i}.png`, { type: 'image/png' }))</span>
|
|
<span class="cstat-no" title="statement not covered" > pageText = ocrText</span>
|
|
<span class="cstat-no" title="statement not covered" > }</span>
|
|
<span class="cstat-no" title="statement not covered" > if (pageText.trim()) texts.push(pageText)</span>
|
|
<span class="cstat-no" title="statement not covered" > }</span>
|
|
<span class="cstat-no" title="statement not covered" > return texts.join('\n')</span>
|
|
<span class="cstat-no" title="statement not covered" >}</span>
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|
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|
<span class="cstat-no" title="statement not covered" >async function extractFromImage(file: File): Promise<string> {</span>
|
|
<span class="cstat-no" title="statement not covered" > const { createWorker } = await import('tesseract.js')</span>
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// Pré-redimensionne l'image si trop petite (largeur minimale 300px)
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<span class="cstat-no" title="statement not covered" > const imgBitmap = await createImageBitmap(file)</span>
|
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<span class="cstat-no" title="statement not covered" > let source: Blob = file</span>
|
|
// Normalisation pour CNI: contraste, gris, upscaling plus agressif
|
|
<span class="cstat-no" title="statement not covered" > const minWidth = /recto|verso|cni|carte/i.test(file.name) ? 1200 : 300</span>
|
|
<span class="cstat-no" title="statement not covered" > if (imgBitmap.width < minWidth) {</span>
|
|
<span class="cstat-no" title="statement not covered" > const scale = minWidth / Math.max(1, imgBitmap.width)</span>
|
|
<span class="cstat-no" title="statement not covered" > const canvas = document.createElement('canvas')</span>
|
|
<span class="cstat-no" title="statement not covered" > canvas.width = Math.max(300, Math.floor(imgBitmap.width * scale))</span>
|
|
<span class="cstat-no" title="statement not covered" > canvas.height = Math.floor(imgBitmap.height * scale)</span>
|
|
<span class="cstat-no" title="statement not covered" > const ctx = canvas.getContext('2d')!</span>
|
|
<span class="cstat-no" title="statement not covered" > ctx.imageSmoothingEnabled = true</span>
|
|
<span class="cstat-no" title="statement not covered" > ctx.imageSmoothingQuality = 'high'</span>
|
|
<span class="cstat-no" title="statement not covered" > ctx.drawImage(imgBitmap, 0, 0, canvas.width, canvas.height)</span>
|
|
// Conversion en niveaux de gris + amélioration du contraste
|
|
<span class="cstat-no" title="statement not covered" > const imgData = ctx.getImageData(0, 0, canvas.width, canvas.height)</span>
|
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<span class="cstat-no" title="statement not covered" > const data = imgData.data</span>
|
|
<span class="cstat-no" title="statement not covered" > for (let i = 0; i < data.length; i += 4) {</span>
|
|
<span class="cstat-no" title="statement not covered" > const r = data[i], g = data[i + 1], b = data[i + 2]</span>
|
|
// luma
|
|
<span class="cstat-no" title="statement not covered" > let y = 0.299 * r + 0.587 * g + 0.114 * b</span>
|
|
// contraste simple
|
|
<span class="cstat-no" title="statement not covered" > y = Math.max(0, Math.min(255, (y - 128) * 1.2 + 128))</span>
|
|
<span class="cstat-no" title="statement not covered" > data[i] = data[i + 1] = data[i + 2] = y</span>
|
|
<span class="cstat-no" title="statement not covered" > }</span>
|
|
<span class="cstat-no" title="statement not covered" > ctx.putImageData(imgData, 0, 0)</span>
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<span class="cstat-no" title="statement not covered" > source = await new Promise<Blob>((resolve) => canvas.toBlob((b) => resolve(b || file))!)</span>
|
|
<span class="cstat-no" title="statement not covered" > }</span>
|
|
|
|
<span class="cstat-no" title="statement not covered" > const worker = await createWorker()</span>
|
|
<span class="cstat-no" title="statement not covered" > try {</span>
|
|
// Configure le logger après création pour éviter DataCloneError
|
|
// @ts-expect-error - setLogger is not directly on Worker type
|
|
<span class="cstat-no" title="statement not covered" > worker.setLogger?.((m: any) => {</span>
|
|
<span class="cstat-no" title="statement not covered" > if (m?.progress != null) console.info('[OCR]', Math.round(m.progress * 100) + '%')</span>
|
|
<span class="cstat-no" title="statement not covered" > })</span>
|
|
<span class="cstat-no" title="statement not covered" > await worker.load()</span>
|
|
// @ts-expect-error - loadLanguage is not directly on Worker type
|
|
<span class="cstat-no" title="statement not covered" > await worker.loadLanguage('fra+eng')</span>
|
|
// @ts-expect-error - initialize is not directly on Worker type
|
|
<span class="cstat-no" title="statement not covered" > await worker.initialize('fra+eng')</span>
|
|
// Essaie plusieurs PSM et orientations (0/90/180/270) et garde le meilleur résultat
|
|
<span class="cstat-no" title="statement not covered" > const rotations = [0, 90, 180, 270]</span>
|
|
<span class="cstat-no" title="statement not covered" > const psmModes = ['6', '7', '11'] // 6: block, 7: single line, 11: sparse text</span>
|
|
<span class="cstat-no" title="statement not covered" > let bestText = ''</span>
|
|
<span class="cstat-no" title="statement not covered" > let bestScore = -1</span>
|
|
|
|
<span class="cstat-no" title="statement not covered" > for (const psm of psmModes) {</span>
|
|
// @ts-expect-error - tessedit_pageseg_mode expects PSM enum, but string is used
|
|
<span class="cstat-no" title="statement not covered" > await worker.setParameters({ tessedit_pageseg_mode: psm })</span>
|
|
<span class="cstat-no" title="statement not covered" > for (const deg of rotations) {</span>
|
|
<span class="cstat-no" title="statement not covered" > const rotatedBlob = await rotateBlob(source, deg)</span>
|
|
<span class="cstat-no" title="statement not covered" > const { data } = await worker.recognize(rotatedBlob)</span>
|
|
<span class="cstat-no" title="statement not covered" > const text = data.text || ''</span>
|
|
<span class="cstat-no" title="statement not covered" > const len = text.replace(/\s+/g, ' ').trim().length</span>
|
|
<span class="cstat-no" title="statement not covered" > const score = (data.confidence || 0) * Math.log(len + 1)</span>
|
|
<span class="cstat-no" title="statement not covered" > if (score > bestScore) {</span>
|
|
<span class="cstat-no" title="statement not covered" > bestScore = score</span>
|
|
<span class="cstat-no" title="statement not covered" > bestText = text</span>
|
|
<span class="cstat-no" title="statement not covered" > }</span>
|
|
// Court-circuit si très bon
|
|
<span class="cstat-no" title="statement not covered" > if (data.confidence >= 85 && len > 40) break</span>
|
|
<span class="cstat-no" title="statement not covered" > }</span>
|
|
<span class="cstat-no" title="statement not covered" > }</span>
|
|
|
|
<span class="cstat-no" title="statement not covered" > return bestText</span>
|
|
<span class="cstat-no" title="statement not covered" > } finally {</span>
|
|
<span class="cstat-no" title="statement not covered" > await worker.terminate()</span>
|
|
<span class="cstat-no" title="statement not covered" > }</span>
|
|
<span class="cstat-no" title="statement not covered" >}</span>
|
|
|
|
<span class="cstat-no" title="statement not covered" >async function rotateBlob(blob: Blob, deg: number): Promise<Blob> {</span>
|
|
<span class="cstat-no" title="statement not covered" > if (deg % 360 === 0) return blob</span>
|
|
<span class="cstat-no" title="statement not covered" > const bmp = await createImageBitmap(blob)</span>
|
|
<span class="cstat-no" title="statement not covered" > const rad = (deg * Math.PI) / 180</span>
|
|
<span class="cstat-no" title="statement not covered" > const sin = Math.abs(Math.sin(rad))</span>
|
|
<span class="cstat-no" title="statement not covered" > const cos = Math.abs(Math.cos(rad))</span>
|
|
<span class="cstat-no" title="statement not covered" > const w = bmp.width</span>
|
|
<span class="cstat-no" title="statement not covered" > const h = bmp.height</span>
|
|
<span class="cstat-no" title="statement not covered" > const newW = Math.floor(w * cos + h * sin)</span>
|
|
<span class="cstat-no" title="statement not covered" > const newH = Math.floor(w * sin + h * cos)</span>
|
|
<span class="cstat-no" title="statement not covered" > const canvas = document.createElement('canvas')</span>
|
|
<span class="cstat-no" title="statement not covered" > canvas.width = newW</span>
|
|
<span class="cstat-no" title="statement not covered" > canvas.height = newH</span>
|
|
<span class="cstat-no" title="statement not covered" > const ctx = canvas.getContext('2d')!</span>
|
|
<span class="cstat-no" title="statement not covered" > ctx.imageSmoothingEnabled = true</span>
|
|
<span class="cstat-no" title="statement not covered" > ctx.imageSmoothingQuality = 'high'</span>
|
|
<span class="cstat-no" title="statement not covered" > ctx.translate(newW / 2, newH / 2)</span>
|
|
<span class="cstat-no" title="statement not covered" > ctx.rotate(rad)</span>
|
|
<span class="cstat-no" title="statement not covered" > ctx.drawImage(bmp, -w / 2, -h / 2)</span>
|
|
<span class="cstat-no" title="statement not covered" > return await new Promise<Blob>((resolve) => canvas.toBlob((b) => resolve(b || blob))!)</span>
|
|
<span class="cstat-no" title="statement not covered" >}</span>
|
|
</pre></td></tr></table></pre>
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Code coverage generated by
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<a href="https://istanbul.js.org/" target="_blank" rel="noopener noreferrer">istanbul</a>
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at 2025-09-15T21:06:54.320Z
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