first commit

app/api/locations/stats/route.ts

@@ -0,0 +1,77 @@
+import { NextResponse } from 'next/server';
+import { getLocationsDb } from '@/lib/db';
+
+/**
+ * GET /api/locations/stats
+ *
+ * Get detailed database statistics
+ */
+export async function GET() {
+  try {
+    const db = getLocationsDb();
+
+    // Overall stats
+    const totalCount = db.prepare('SELECT COUNT(*) as count FROM Location').get() as { count: number };
+
+    // Time range
+    const timeRange = db.prepare(
+      'SELECT MIN(timestamp) as oldest, MAX(timestamp) as newest FROM Location'
+    ).get() as { oldest: string | null; newest: string | null };
+
+    // Database size
+    const dbSize = db.prepare(
+      "SELECT page_count * page_size / 1024 / 1024.0 as sizeMB FROM pragma_page_count(), pragma_page_size()"
+    ).get() as { sizeMB: number };
+
+    // WAL mode check
+    const walMode = db.prepare("PRAGMA journal_mode").get() as { journal_mode: string };
+
+    // Locations per device
+    const perDevice = db.prepare(`
+      SELECT username, COUNT(*) as count
+      FROM Location
+      WHERE user_id = 0
+      GROUP BY username
+      ORDER BY count DESC
+    `).all() as Array<{ username: string; count: number }>;
+
+    // Locations per day (last 7 days)
+    const perDay = db.prepare(`
+      SELECT
+        DATE(timestamp) as date,
+        COUNT(*) as count
+      FROM Location
+      WHERE timestamp >= datetime('now', '-7 days')
+      GROUP BY DATE(timestamp)
+      ORDER BY date DESC
+    `).all() as Array<{ date: string; count: number }>;
+
+    // Average locations per day
+    const avgPerDay = perDay.length > 0
+      ? Math.round(perDay.reduce((sum, day) => sum + day.count, 0) / perDay.length)
+      : 0;
+
+    db.close();
+
+    return NextResponse.json({
+      total: totalCount.count,
+      oldest: timeRange.oldest,
+      newest: timeRange.newest,
+      sizeMB: Math.round(dbSize.sizeMB * 100) / 100,
+      walMode: walMode.journal_mode,
+      perDevice,
+      perDay,
+      avgPerDay,
+    });
+
+  } catch (error) {
+    console.error('Stats error:', error);
+    return NextResponse.json(
+      {
+        error: 'Failed to get database stats',
+        details: error instanceof Error ? error.message : 'Unknown error'
+      },
+      { status: 500 }
+    );
+  }
+}