multi-file update

.claude/settings.local.json

@@ -0,0 +1,8 @@
+{
+  "permissions": {
+    "allow": [
+      "Bash(npx prisma migrate dev --name add-drive-file-id)",
+      "Bash(npx prisma db push)"
+    ]
+  }
+}

prisma/schema.prisma

@@ -66,6 +66,7 @@ model Report {
   date         DateTime @default(now())
   managerName  String
   status       ReportStatus @default(IN_PROGRESS)
+  driveFileId  String?
   userId       String
   user         User     @relation(fields: [userId], references: [id])
   tasks        Task[]

src/app/api/reports/[id]/export/route.ts

@@ -5,7 +5,7 @@ export const runtime = "nodejs";
 import { getServerSession } from "next-auth/next";
 import { authOptions } from "@/lib/auth";
 import { prisma } from "@/lib/prisma";
-import { uploadToDrive, generateReportMarkdown } from "@/lib/google-drive";
+import { uploadToDrive, updateDriveFile, generateReportMarkdown } from "@/lib/google-drive";
 
 export async function POST(
   req: Request,
@@ -46,17 +46,23 @@ export async function POST(
   });
 
   try {
-    const driveFile = await uploadToDrive(
-        account.access_token,
-        fileName,
-        markdown,
-        folderSetting?.value
-    );
+    let driveFile;
 
-    // Update report status to SUBMITTED
+    if (report.driveFileId) {
+      // Update the existing Drive file in place
+      driveFile = await updateDriveFile(account.access_token, report.driveFileId, markdown);
+    } else {
+      // First export — create a new Drive file and store its ID
+      driveFile = await uploadToDrive(account.access_token, fileName, markdown, folderSetting?.value);
       await prisma.report.update({
         where: { id },
-      data: { status: 'SUBMITTED' }
+        data: { driveFileId: driveFile.id },
+      });
+    }
+
+    await prisma.report.update({
+      where: { id },
+      data: { status: 'SUBMITTED' },
     });
 
     return NextResponse.json({ success: true, link: driveFile.webViewLink });

src/components/ReportForm.tsx

@@ -316,10 +316,10 @@ export default function ReportForm() {
           <footer className="pt-8 border-t border-white/10 flex justify-end gap-4">
             <button
                 onClick={exportToDrive}
-                disabled={saving || report.status === 'SUBMITTED'}
+                disabled={saving}
                 className="btn-primary flex items-center gap-2 px-8"
             >
-              {saving ? "Processing..." : (report.status === 'SUBMITTED' ? "Already Submitted" : "Finalize & Export to Drive")}
+              {saving ? "Processing..." : (report.status === 'SUBMITTED' ? "Re-export to Drive" : "Finalize & Export to Drive")}
               <Send size={18} />
             </button>
           </footer>

src/lib/google-drive.ts

@@ -34,6 +34,30 @@ export async function uploadToDrive(accessToken: string, fileName: string, conte
   }
 }
 
+export async function updateDriveFile(accessToken: string, fileId: string, content: string) {
+  const auth = new google.auth.OAuth2();
+  auth.setCredentials({ access_token: accessToken });
+
+  const drive = google.drive({ version: 'v3', auth });
+
+  const media = {
+    mimeType: 'text/markdown',
+    body: Readable.from([content]),
+  };
+
+  try {
+    const response = await drive.files.update({
+      fileId,
+      media,
+      fields: 'id, webViewLink',
+    });
+    return response.data;
+  } catch (error) {
+    console.error('Error updating Google Drive file:', error);
+    throw error;
+  }
+}
+
 export function generateReportMarkdown(report: any) {
   let md = `# WFH Daily Report - ${new Date(report.date).toLocaleDateString()}\n`;
   md += `**Employee:** ${report.user.name}\n`;