Update participant and study API routes

src/app/api/participants/route.ts

@@ -0,0 +1,25 @@
+import { db } from "~/server/db";
+import { participants } from "~/server/db/schema";
+import { NextResponse } from "next/server";
+import { eq } from "drizzle-orm";
+
+export async function GET(request: Request) {
+  const { searchParams } = new URL(request.url);
+  const studyId = searchParams.get('studyId');
+  
+  if (!studyId) {
+    return NextResponse.json({ error: 'Study ID is required' }, { status: 400 });
+  }
+
+  const allParticipants = await db.select().from(participants).where(eq(participants.studyId, parseInt(studyId)));
+  return NextResponse.json(allParticipants);
+}
+
+export async function POST(request: Request) {
+  const { name, studyId } = await request.json();
+  if (!name || !studyId) {
+    return NextResponse.json({ error: 'Name and Study ID are required' }, { status: 400 });
+  }
+  const newParticipant = await db.insert(participants).values({ name, studyId }).returning();
+  return NextResponse.json(newParticipant[0]);
+}