Initial commit

src/routes/api/health/+server.ts

@@ -0,0 +1,28 @@
+import { json } from '@sveltejs/kit';
+import { getPool } from '$lib/server/db';
+
+export async function GET() {
+  const pool = getPool();
+  let database: 'disabled' | 'up' | 'down' = 'disabled';
+
+  if (pool) {
+    try {
+      await pool.query('select 1');
+      database = 'up';
+    } catch (error) {
+      console.error('Health check database query failed.', error);
+      database = 'down';
+    }
+  }
+
+  return json(
+    {
+      status: database === 'down' ? 'degraded' : 'ok',
+      database,
+      timestamp: new Date().toISOString()
+    },
+    {
+      status: database === 'down' ? 503 : 200
+    }
+  );
+}

src/routes/api/health/health.test.ts

@@ -0,0 +1,57 @@
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+
+vi.mock('$lib/server/db', () => ({
+  getPool: vi.fn()
+}));
+
+import { getPool } from '$lib/server/db';
+import { GET } from './+server';
+
+describe('health endpoint', () => {
+  beforeEach(() => {
+    vi.mocked(getPool).mockReset();
+  });
+
+  it('reports a disabled database when no connection string is configured', async () => {
+    vi.mocked(getPool).mockReturnValue(null);
+
+    const response = await GET();
+    const body = await response.json();
+
+    expect(response.status).toBe(200);
+    expect(body).toMatchObject({
+      status: 'ok',
+      database: 'disabled'
+    });
+  });
+
+  it('reports an available database when the query succeeds', async () => {
+    vi.mocked(getPool).mockReturnValue({
+      query: vi.fn().mockResolvedValue({})
+    } as never);
+
+    const response = await GET();
+    const body = await response.json();
+
+    expect(response.status).toBe(200);
+    expect(body).toMatchObject({
+      status: 'ok',
+      database: 'up'
+    });
+  });
+
+  it('reports a degraded status when the database query fails', async () => {
+    vi.mocked(getPool).mockReturnValue({
+      query: vi.fn().mockRejectedValue(new Error('connection refused'))
+    } as never);
+
+    const response = await GET();
+    const body = await response.json();
+
+    expect(response.status).toBe(503);
+    expect(body).toMatchObject({
+      status: 'degraded',
+      database: 'down'
+    });
+  });
+});