Add modal for export method selection in AdminPage and update export filename based on hosting type

src/app/api/admin/exportlocal/route.ts

@@ -0,0 +1,47 @@
+import tar from 'tar';
+import { NextResponse } from 'next/server';
+import { statSync, createReadStream, existsSync } from 'fs';
+import path from 'path';
+import { gzip } from 'zlib';
+
+
+// This is the route for exporting posts when using the local production server
+// If you try this on the docker server, it will fail because the posts directory is not on the docker server
+
+export async function GET() {
+  try {
+    const localDir = 'posts';
+    const tarballName = 'local-export.tar.gz';
+    const tarballPath = path.join('/tmp', tarballName);
+
+    if (!existsSync(localDir)) {
+      return NextResponse.json({ error: `${localDir} directory does not exist` }, { status: 400 });
+    }
+    
+    await tar.c(
+        {
+        gzip: true,
+        file: tarballPath,
+        cwd: path.dirname(localDir),
+        portable: true,
+        noMtime: true,
+      },
+      [path.basename(localDir)]
+    );
+
+    const stat = statSync(tarballPath);
+    const stream = createReadStream(tarballPath);
+
+    return new Response(stream as any, {
+      status: 200,
+      headers: {
+        'Content-Type': 'application/gzip',
+        'Content-Disposition': `attachment; filename="${tarballName}"`,
+        'Content-Length': stat.size.toString(),
+      },
+    });
+  } catch (error) {
+    console.error('Error exporting local:', error);
+    return NextResponse.json({ error: 'Error exporting local' }, { status: 500 });
+  }
+}