import React, { useState, useRef, useEffect } from 'react';
import { Camera, FileUp, Crop, Check, X, ArrowUpToLine, Plus, Search, RotateCcw } from 'lucide-react';
// The main application component for the PWA document scanner.
const App = () => {
// State to manage the current screen of the application.
const [currentScreen, setCurrentScreen] = useState('start');
// State to store the captured or imported image.
const [image, setImage] = useState(null);
// State to store the cropped/enhanced image.
const [processedImage, setProcessedImage] = useState(null);
// State to manage camera access status.
const [cameraAccess, setCameraAccess] = useState(false);
// State to manage the user's name for the upload.
const [userName, setUserName] = useState('');
// State for the upload progress.
const [isUploading, setIsUploading] = useState(false);
// State for the last selected "demarche" (process type).
const [selectedDemarche, setSelectedDemarche] = useState(null);
// References to the video, canvas, and crop canvases.
const videoRef = useRef(null);
const canvasRef = useRef(null);
const cropCanvasRef = useRef(null);
// Handles navigation to the next screen.
const handleNext = (screen) => {
setCurrentScreen(screen);
};
// Handles starting the camera for capture.
const startCamera = async () => {
try {
const stream = await navigator.mediaDevices.getUserMedia({ video: { facingMode: 'environment' } });
videoRef.current.srcObject = stream;
setCameraAccess(true);
setCurrentScreen('capture');
} catch (err) {
console.error("Error accessing the camera:", err);
alert("Impossible d'accéder à la caméra. Veuillez vérifier les permissions.");
}
};
// Handles taking a photo from the video feed.
const takePhoto = () => {
const video = videoRef.current;
const canvas = canvasRef.current;
if (video && canvas) {
canvas.width = video.videoWidth;
canvas.height = video.videoHeight;
const context = canvas.getContext('2d');
context.drawImage(video, 0, 0, canvas.width, canvas.height);
const photoDataUrl = canvas.toDataURL('image/jpeg', 1.0);
setImage(photoDataUrl);
video.srcObject.getTracks().forEach(track => track.stop());
setCurrentScreen('crop');
}
};
// Handles file import from the file input.
const handleFileImport = (event) => {
const file = event.target.files[0];
if (file) {
const reader = new FileReader();
reader.onloadend = () => {
const fileDataUrl = reader.result;
if (file.type.startsWith('image/')) {
setImage(fileDataUrl);
setCurrentScreen('crop');
} else if (file.type === 'application/pdf') {
// Simplified PDF handling. In a real app, you would use a library like pdf.js
alert("Les fichiers PDF ne peuvent pas être prévisualisés ou recadrés. Envoi direct.");
setProcessedImage(fileDataUrl);
setCurrentScreen('validate');
} else {
alert("Format de fichier non supporté. Veuillez utiliser JPEG, PNG ou PDF.");
}
};
reader.readAsDataURL(file);
}
};
// A simplified function for image enhancement and cropping.
const processImage = () => {
if (!image) return;
const img = new Image();
img.src = image;
img.onload = () => {
const canvas = cropCanvasRef.current;
const ctx = canvas.getContext('2d');
// Set canvas dimensions based on image, maintaining aspect ratio.
const maxWidth = 800;
const maxHeight = 800;
let width = img.width;
let height = img.height;
if (width > height) {
if (width > maxWidth) {
height *= maxWidth / width;
width = maxWidth;
}
} else {
if (height > maxHeight) {
width *= maxHeight / height;
height = maxHeight;
}
}
canvas.width = width;
canvas.height = height;
// Draw the original image.
ctx.drawImage(img, 0, 0, width, height);
// Apply brightness/contrast filters (simulated).
// This is a simple example. A real implementation would use
// a more advanced algorithm to modify pixel data.
const filter = 'brightness(1.2) contrast(1.1)';
canvas.style.filter = filter;
// For a real app, you'd use a library to handle manual cropping
// with a UI overlay. Here, we just assume the image is processed.
setProcessedImage(canvas.toDataURL('image/jpeg', 0.9));
setCurrentScreen('validate');
};
};
// Handles the secure upload of the processed document.
const handleUpload = async () => {
if (!processedImage) return;
setIsUploading(true);
// Simulate secure upload via REST API with JWT token.
// In a real application, replace this with your actual endpoint.
const apiEndpoint = 'https://api.votre-site.com/upload';
const jwtToken = 'YOUR_JWT_TOKEN_HERE'; // Replace with a real JWT token.
const blob = await fetch(processedImage).then(res => res.blob());
const formData = new FormData();
formData.append('document', blob, `document-${Date.now()}.jpeg`);
formData.append('demarche', selectedDemarche);
formData.append('userName', userName);
try {
const response = await fetch(apiEndpoint, {
method: 'POST',
headers: {
'Authorization': `Bearer ${jwtToken}`,
},
body: formData,
});
if (response.ok) {
alert("Document envoyé avec succès !");
} else {
alert("Erreur lors de l'envoi du document.");
}
} catch (error) {
console.error("Upload error:", error);
alert("Échec de l'envoi. Veuillez vérifier votre connexion.");
} finally {
setIsUploading(false);
setCurrentScreen('start'); // Return to the start screen after upload.
}
};
// UI components for each screen.
const renderScreen = () => {
switch (currentScreen) {
case 'start':
const demarches = [
"Changement de titulaire d’un véhicule immatriculé en France",
"Changement de titulaire d’un véhicule immatriculé dans un autre pays européen",
"Déclaration d'achat d’un véhicule d’occasion (réservée aux professionnels)",
"Enregistrement de cession d’un véhicule",
"Demande de carte grise provisoire (WW/CPI)",
"Obtention du quitus fiscal",
"Demande de W Garage (nouvelle demande)"
];
return (
);
case 'source_choice':
return (
);
case 'capture':
return (
)}
);
case 'crop':
return (
{/* Simulated crop overlay. In a real app, you'd add draggable handles. */}
)}
);
case 'validate':
return (
) : (
);
default:
return null;
}
};
// Main render of the app.
return (
{renderScreen()}
);
};
export default App;
// The following is boilerplate code for a real PWA project. It is not functional in this environment.
// ------------------------------------------------------------------------------------------------
// PWA Manifest (manifest.json)
// This file would be placed in the public directory of your Next.js project.
/*
{
"name": "Scanner PWA",
"short_name": "Scanner",
"start_url": ".",
"display": "standalone",
"background_color": "#ffffff",
"theme_color": "#2563eb",
"icons": [
{
"src": "/icons/icon-192x192.png",
"sizes": "192x192",
"type": "image/png"
},
{
"src": "/icons/icon-512x512.png",
"sizes": "512x512",
"type": "image/png"
},
{
"src": "/icons/maskable_icon.png",
"sizes": "512x512",
"type": "image/png",
"purpose": "maskable"
}
],
"splash_screens": [
{
"src": "/splash/splash-640x1136.png",
"sizes": "640x1136",
"type": "image/png"
}
]
}
*/
// Service Worker (service-worker.js)
// This file would be registered in your main application file (e.g., _app.js in Next.js).
/*
if ('serviceWorker' in navigator) {
window.addEventListener('load', () => {
navigator.serviceWorker.register('/service-worker.js')
.then(registration => {
console.log('Service Worker registered with scope:', registration.scope);
})
.catch(err => {
console.log('Service Worker registration failed:', err);
});
});
}
// In a real service-worker.js file, you would add logic for caching assets
// to enable offline mode.
self.addEventListener('install', (event) => {
event.waitUntil(
caches.open('v1').then((cache) => {
return cache.addAll([
'/',
'/index.html',
'/styles.css',
'/app.js',
'/icons/icon-192x192.png'
]);
})
);
});
self.addEventListener('fetch', (event) => {
event.respondWith(
caches.match(event.request).then((response) => {
return response || fetch(event.request);
})
);
});
*/
![Document traité]()
Sélectionnez le type de démarche
setUserName(e.target.value)}
placeholder="Entrez votre nom"
className="w-full px-4 py-2 border rounded-md focus:ring-blue-500 focus:border-blue-500"
/>
{demarches.map((demarche, index) => (
))}
Comment voulez-vous numériser votre document ?
Cadrez votre document
{cameraAccess ? ( ) : (Chargement de la caméra...
Recadrage et amélioration
Ajustez les bords si nécessaire et modifiez les paramètres pour optimiser l'image.
{image && (Prévisualisation et validation
Vérifiez la lisibilité avant l'envoi.
{processedImage ? (Image en cours de traitement...
)}PWA Numérisation de Documents
Scanner et envoyer des documents pour votre certificat d'immatriculation.
PWA Numérisation de Documents
Scanner et envoyer des documents pour votre certificat d'immatriculation.
Prévisualisation et validation
Vérifiez la lisibilité avant l'envoi.