"feat-sharepoint-test-button-and-error-feedback"

backend/src/routes/invoices.ts

@@ -337,6 +337,7 @@ router.post('/:id/send', wrap(async (req: AuthRequest, res: Response): Promise<v
 
   // ── SharePoint (non bloquant) ─────────────────────────────
   let trackingAdded = false;
+  let trackingError: string | null = null;
   if (invoice.add_to_tracking) {
     try {
       const [year, month, day] = dateStr.split('-');
@@ -351,8 +352,10 @@ router.post('/:id/send', wrap(async (req: AuthRequest, res: Response): Promise<v
       });
       trackingAdded = true;
     } catch (err: any) {
-      // Non bloquant : l'email est déjà envoyé, on log l'erreur
+      // Non bloquant : l'email est déjà envoyé, mais on remonte l'erreur
+      // pour que le frontend puisse afficher un avertissement.
       console.warn('[SharePoint] Erreur non bloquante :', err.message);
+      trackingError = err.message;
     }
   }
 
@@ -365,7 +368,8 @@ router.post('/:id/send', wrap(async (req: AuthRequest, res: Response): Promise<v
     [path.join('pdfs', `${invoice.id}.pdf`), pdfFilename, trackingAdded, invoice.id]
   );
 
-  res.json(await getInvoiceById(invoice.id));
+  const updated = await getInvoiceById(invoice.id);
+  res.json({ ...updated, tracking_error: trackingError });
 }));
 
 /**

backend/src/routes/settings.ts

@@ -140,4 +140,15 @@ router.put('/app', validate(appSettingsSchema), wrap(async (req: AuthRequest, re
   res.json({ success: true });
 }));
 
+/** POST /api/settings/sharepoint/test — Vérifie la connexion Graph + accès au fichier Excel */
+router.post('/sharepoint/test', wrap(async (_req: AuthRequest, res: Response): Promise<void> => {
+  try {
+    const { testSharepointConnection } = await import('../services/sharepoint');
+    await testSharepointConnection();
+    res.json({ success: true, message: 'Connexion SharePoint OK — fichier Excel accessible.' });
+  } catch (err: any) {
+    res.status(400).json({ error: err.message });
+  }
+}));
+
 export default router;

backend/src/services/sharepoint.ts

@@ -76,6 +76,27 @@ async function getAccessToken(cfg: GraphConfig): Promise<string> {
   return data.access_token;
 }
 
+// ─── Test de connexion (sans écriture) ───────────────────────
+
+/**
+ * Vérifie que le token Graph s'obtient et que la feuille Excel est accessible.
+ * Utilisé par POST /api/settings/sharepoint/test.
+ */
+export async function testSharepointConnection(): Promise<void> {
+  const cfg   = await getGraphConfig();
+  const token = await getAccessToken(cfg);
+
+  const baseUrl = `https://graph.microsoft.com/v1.0/sites/${cfg.sharepointSiteId}/drive/items/${cfg.sharepointItemId}/workbook/worksheets/${encodeURIComponent(cfg.sharepointSheet)}`;
+  const resp = await fetch(`${baseUrl}/usedRange?$select=rowCount`, {
+    headers: { Authorization: `Bearer ${token}` },
+  });
+
+  if (!resp.ok) {
+    const body = await resp.text();
+    throw new Error(`Impossible d'accéder à la feuille "${cfg.sharepointSheet}" (${resp.status}) : ${body.slice(0, 200)}`);
+  }
+}
+
 // ─── Fonction principale ──────────────────────────────────────
 
 /**