Refactor la route de prévisualisation d'image pour améliorer la gestion des erreurs et intégrer le redimensionnement d'image dans des fonctions séparées

routes/imageRoutes.js

@@ -62,45 +62,55 @@ router.get('/images/:measurementId', (req, res) => {
     });
 });
 
-router.get('/preview/:projectId/:orderId', async (req, res) => {
-    const projectId = req.params.projectId;
-    const orderId = req.params.orderId;
+const getImagePath = async (projectId, orderId) => {
     const query = 'SELECT path FROM public.measurements WHERE project_id = $1 AND order_id = $2';
-
-    try {
     const result = await db.query(query, [projectId, orderId]);
     if (result.rows.length === 0) {
-            return res.status(404).json({ error: 'Image not found' });
+        throw new Error('Image not found');
     }
+    return result.rows[0].path;
+};
 
-        const imagePath = result.rows[0].path;
-
-        // Vérifier si l'image existe
-        fs.access(imagePath, fs.constants.F_OK, async (err) => {
+const checkImageExists = (imagePath) => {
+    return new Promise((resolve, reject) => {
+        fs.access(imagePath, fs.constants.F_OK, (err) => {
             if (err) {
-                console.error('Image not found:', err);
-                return res.status(404).json({ error: 'Image not found' });
+                reject(new Error('Image not found'));
+            } else {
+                resolve();
             }
+        });
+    });
+};
 
-            // Obtenir les dimensions originales de l'image
+const resizeImage = async (imagePath) => {
     const metadata = await sharp(imagePath).metadata();
     const width = Math.floor(metadata.width / 7);
     const height = Math.floor(metadata.height / 7);
-
-            // Redimensionner l'image à la moitié de ses dimensions d'origine
-            const resizedImage = await sharp(imagePath)
+    return sharp(imagePath)
         .resize(width, height)
         .jpeg({ quality: 65 })
         .toBuffer();
+};
+
+router.get('/preview/:projectId/:orderId', async (req, res) => {
+    const projectId = req.params.projectId;
+    const orderId = req.params.orderId;
+
+    try {
+        const imagePath = await getImagePath(projectId, orderId);
+        await checkImageExists(imagePath);
+        const resizedImage = await resizeImage(imagePath);
 
         res.set('Content-Type', 'image/jpeg');
         res.send(resizedImage);
-        });
     } catch (err) {
         console.error('Error getting image preview:', err);
+        if (err.message === 'Image not found') {
+            return res.status(404).json({ error: 'Image not found' });
+        }
         return res.status(500).json({ error: 'Internal Server Error' });
     }
 });
 
-
 module.exports = router;