build out retention reports

pages/api/reports/retention.ts

@@ -0,0 +1,55 @@
+import { canViewWebsite } from 'lib/auth';
+import { useCors, useAuth } from 'lib/middleware';
+import { NextApiRequestQueryBody } from 'lib/types';
+import { NextApiResponse } from 'next';
+import { ok, methodNotAllowed, unauthorized } from 'next-basics';
+import { getRetention } from 'queries';
+
+export interface RetentionRequestBody {
+  websiteId: string;
+  urls: string[];
+  window: number;
+  dateRange: {
+    startDate: string;
+    endDate: string;
+  };
+}
+
+export interface RetentionResponse {
+  urls: string[];
+  window: number;
+  startAt: number;
+  endAt: number;
+}
+
+export default async (
+  req: NextApiRequestQueryBody<any, RetentionRequestBody>,
+  res: NextApiResponse<RetentionResponse>,
+) => {
+  await useCors(req, res);
+  await useAuth(req, res);
+
+  if (req.method === 'POST') {
+    const {
+      websiteId,
+      urls,
+      window,
+      dateRange: { startDate, endDate },
+    } = req.body;
+
+    if (!(await canViewWebsite(req.auth, websiteId))) {
+      return unauthorized(res);
+    }
+
+    const data = await getRetention(websiteId, {
+      startDate: new Date(startDate),
+      endDate: new Date(endDate),
+      urls,
+      windowMinutes: +window,
+    });
+
+    return ok(res, data);
+  }
+
+  return methodNotAllowed(res);
+};