Ajouter une route pour prévisualiser une image redimensionnée par ID de projet et ID de commande

routes/imageRoutes.js

@@ -1,5 +1,6 @@
 const express = require('express');
 const router = express.Router();
+const sharp = require('sharp');
 const path = require('path');
 const fs = require('fs');
 const dbTester = require('../test/tester');
@@ -129,4 +130,74 @@ router.get('/images/:measurementId', (req, res) => {
     });
 });
 
+/**
+ * @swagger
+ * /preview/{projectId}/{orderId}:
+ *   get:
+ *     summary: Retrieve a preview of an image by project and order ID
+ *     parameters:
+ *       - in: path
+ *         name: projectId
+ *         required: true
+ *         schema:
+ *           type: string
+ *         description: The project ID
+ *       - in: path
+ *         name: orderId
+ *         required: true
+ *         schema:
+ *           type: string
+ *         description: The order ID
+ *     responses:
+ *       200:
+ *         description: A resized preview of the image
+ *         content:
+ *           image/jpeg:
+ *             schema:
+ *               type: string
+ *               format: binary
+ *       404:
+ *         description: Image not found
+ *       500:
+ *         description: Internal Server Error
+ */
+router.get('/preview/:projectId/:orderId', async (req, res) => {
+    const projectId = req.params.projectId;
+    const orderId = req.params.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' });
+        }
+
+        const imagePath = result.rows[0].path;
+
+        // Vérifier si l'image existe
+        fs.access(imagePath, fs.constants.F_OK, async (err) => {
+            if (err) {
+                console.error('Image not found:', err);
+                return res.status(404).json({ error: 'Image not found' });
+            }
+
+            // Obtenir les dimensions originales de l'image
+            const metadata = await sharp(imagePath).metadata();
+            const width = Math.floor(metadata.width / 2);
+            const height = Math.floor(metadata.height / 2);
+
+            // Redimensionner l'image à la moitié de ses dimensions d'origine
+            const resizedImage = await sharp(imagePath)
+                .resize(width, height)
+                .toBuffer();
+
+            res.set('Content-Type', 'image/jpeg');
+            res.send(resizedImage);
+        });
+    } catch (err) {
+        console.error('Error getting image preview:', err);
+        return res.status(500).json({ error: 'Internal Server Error' });
+    }
+});
+
 module.exports = router;