refactor: optimize team booking limits query with in-app filtering

[emrysal]

What does this PR do?

Optimizes the team booking limits query in _getBusyTimesFromTeamLimitsForUsers by replacing an expensive attendee.email IN (64+ emails) SQL pattern with indexed eventType.teamId filtering and in-application user filtering.

Problem: The original query generated an expensive EXISTS subquery scanning attendees for each booking with 64+ email parameters, which is slow for large teams.

Solution:

• Query all team bookings by eventType.teamId (indexed column)
• Filter in application code using Sets for O(1) lookups to find bookings where users are organizers or attendees

Changes:

• Add findByTeamIdAndDateRangeIncludeAttendees to BookingRepository
• Refactor _getBusyTimesFromTeamLimitsForUsers to use the new method with in-app filtering

Trade-off: Returns slightly more data from DB (all team bookings vs only user-relevant), but the query is significantly faster due to using indexed columns instead of expensive EXISTS subqueries.

Mandatory Tasks (DO NOT REMOVE)

• I have self-reviewed the code (A decent size PR without self-review might be rejected).
• I have updated the developer docs in /docs if this PR makes changes that would require a documentation change. N/A - internal optimization only.
• I confirm automated tests are in place that prove my fix is effective or that my feature works.

How should this be tested?

1. Test team booking limits functionality with a team that has multiple members
2. Verify availability slots are correctly calculated when team booking limits are configured
3. Compare query performance before/after for teams with 50+ members

Key verification points:

• Bookings where user is the organizer (userId) should be counted toward limits
• Bookings where user is an attendee (email match) should be counted toward limits
• Managed event bookings should be included when includeManagedEvents is true

Checklist

• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have checked if my changes generate no new warnings

Human Review Checklist

• Verify the in-app filtering logic correctly replicates the original query behavior (organizer OR attendee matching)
• Consider if existing tests adequately cover this code path
• Evaluate the trade-off for teams with many bookings but few relevant users

---

Link to Devin run: https://app.devin.ai/sessions/65b1815aa6b74057959160047de5e8f3
Requested by: @emrysal

[devin-ai-integration]

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[cubic-dev-ai]

1 issue found across 2 files

Prompt for AI agents (all issues)

Check if these issues are valid — if so, understand the root cause of each and fix them.


<file name="packages/trpc/server/routers/viewer/slots/util.ts">

<violation number="1" location="packages/trpc/server/routers/viewer/slots/util.ts:659">
P2: The new attendee-email filter applies to all bookings (including managed events), but the previous query only counted managed bookings when the organizer userId matched. This changes booking-limit behavior for managed events and can over-count limits. Consider distinguishing managed bookings and only applying attendee matching to non-managed bookings to preserve prior behavior.</violation>
</file>

_{Reply with feedback, questions, or to request a fix. Tag @cubic-dev-ai to re-run a review.}

[cubic-dev-ai]

P2: The new attendee-email filter applies to all bookings (including managed events), but the previous query only counted managed bookings when the organizer userId matched. This changes booking-limit behavior for managed events and can over-count limits. Consider distinguishing managed bookings and only applying attendee matching to non-managed bookings to preserve prior behavior.

Prompt for AI agents

Check if this issue is valid — if so, understand the root cause and fix it. At packages/trpc/server/routers/viewer/slots/util.ts, line 659:

<comment>The new attendee-email filter applies to all bookings (including managed events), but the previous query only counted managed bookings when the organizer userId matched. This changes booking-limit behavior for managed events and can over-count limits. Consider distinguishing managed bookings and only applying attendee matching to non-managed bookings to preserve prior behavior.</comment>

<file context>
@@ -634,16 +634,32 @@ export class AvailableSlotsService {
+        return true;
+      }
+      // Check if any user is an attendee
+      return booking.attendees.some((attendee) => userEmailSet.has(attendee.email));
+    });
+
</file context>

[github-actions]

Devin AI is addressing Cubic AI's review feedback

A Devin session has been created to address the issues identified by Cubic AI.

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[devin-ai-integration]

I reviewed the Cubic AI feedback on this PR. The issue identified (violation #1 regarding the attendee-email filter applying to managed events) has a confidence score of 7/10, which is below the 9/10 threshold required for automated fixes.

Issue skipped due to low confidence score:

• Violation The getIntegrations function runs repeatedly due to state polling #1 (line 659): "The new attendee-email filter applies to all bookings (including managed events), but the previous query only counted managed bookings when the organizer userId matched." - Confidence: 7/10

Since no issues meet the 9/10 confidence threshold, no changes were made to this PR. A human reviewer should evaluate whether this concern is valid and warrants a fix.