init

app/api/export/route.ts

@@ -0,0 +1,77 @@
+import { NextRequest } from 'next/server'
+import { z } from 'zod'
+import { prisma } from '@/src/lib/prisma'
+
+const ExportSchema = z.object({
+  ids: z.array(z.string()).min(1),
+  format: z.enum(['csv', 'json']),
+})
+
+export async function POST(req: NextRequest) {
+  try {
+    const body = await req.json()
+    const parsed = ExportSchema.safeParse(body)
+    if (!parsed.success) return Response.json({ error: 'invalid body' }, { status: 400 })
+    const { ids, format } = parsed.data
+
+    const rows = await prisma.recording.findMany({
+      where: { id: { in: ids } },
+      orderBy: { timestamp: 'asc' },
+      // Cast select to any to accommodate freshly added fields before prisma generate
+      select: {
+        id: true,
+        timestamp: true,
+        code_data: true,
+        fit_a: true,
+        fit_b: true,
+        sample_count: true,
+        duration: true,
+        rec_start_ms: true,
+        rec_end_ms: true,
+      } ,
+    })
+
+    if (format === 'json') {
+      const payload = rows.map((r) => ({
+        id: r.id,
+        timestamp: new Date(r.timestamp).toISOString(),
+        code: r.code_data,
+        fit: r.fit_a != null ? { a: r.fit_a, b: r.fit_b } : undefined,
+        sampleCount: r.sample_count,
+        duration: r.duration,
+      }))
+      return new Response(JSON.stringify(payload), {
+        headers: {
+          'content-type': 'application/json; charset=utf-8',
+          'content-disposition': `attachment; filename="export-${Date.now()}.json"`,
+        },
+      })
+    }
+
+    // CSV
+    let csv = 'recordId,timestamp,index,timeSec,code,force\n'
+    for (const r of rows) {
+      let step = r.sample_count > 0 ? r.duration / r.sample_count : 0
+      if (r.rec_start_ms != null && r.rec_end_ms != null && r.sample_count > 0) {
+        const dtMs = Number((r.rec_end_ms as bigint) - (r.rec_start_ms as bigint))
+        if (Number.isFinite(dtMs) && dtMs > 0) step = dtMs / 1000 / r.sample_count
+      }
+      const hasFit = r.fit_a != null
+      for (let i = 0; i < r.code_data.length; i++) {
+        const t = (i * step).toFixed(6)
+        const code = r.code_data[i]
+        const force = hasFit ? r.fit_a! * code + (r.fit_b ?? 0) : ''
+        csv += `${r.id},${new Date(r.timestamp).toISOString()},${i},${t},${code},${hasFit ? force : ''}\n`
+      }
+    }
+    return new Response(csv, {
+      headers: {
+        'content-type': 'text/csv; charset=utf-8',
+        'content-disposition': `attachment; filename="export-${Date.now()}.csv"`,
+      },
+    })
+  } catch (err) {
+    console.error(err)
+    return Response.json({ error: 'internal error' }, { status: 500 })
+  }
+}