a lot

apps/worker/src/jobs/events.create-session-end.ts

@@ -0,0 +1,56 @@
+import type { Job } from 'bullmq';
+
+import { getTime, toISOString } from '@mixan/common';
+import { createEvent, getEvents } from '@mixan/db';
+import type { EventsQueuePayloadCreateSessionEnd } from '@mixan/queue/src/queues';
+
+export async function createSessionEnd(
+  job: Job<EventsQueuePayloadCreateSessionEnd>
+) {
+  const payload = job.data.payload;
+
+  const sql = `
+  SELECT * FROM events 
+  WHERE 
+    profile_id = '${payload.profileId}' 
+    AND created_at >= (
+      SELECT created_at 
+      FROM events
+      WHERE 
+        profile_id = '${payload.profileId}' 
+        AND name = 'session_start'
+      ORDER BY created_at DESC
+      LIMIT 1
+    ) 
+  ORDER BY created_at DESC
+`;
+  job.log(sql);
+  const events = await getEvents(sql);
+
+  const sessionDuration = events.reduce((acc, event) => {
+    return acc + event.duration;
+  }, 0);
+
+  const sessionStart = events.find((event) => event.name === 'session_start');
+  const lastScreenView = events.find((event) => event.name === 'screen_view');
+  const screenViews = events.filter((event) => event.name === 'screen_view');
+
+  if (!sessionStart) {
+    throw new Error('Failed to find a session_start');
+  }
+
+  if (!lastScreenView) {
+    throw new Error('Failed to find a screen_view');
+  }
+
+  return createEvent({
+    ...sessionStart,
+    properties: {
+      _bounce: screenViews.length === 1,
+    },
+    name: 'session_end',
+    duration: sessionDuration,
+    path: lastScreenView?.path ?? '',
+    createdAt: toISOString(getTime(lastScreenView.createdAt) + 100),
+  });
+}