[RohSrik]

Description

Fixed incorrect month-over-month (MoM) percentages and date filtering in the Lessons Learnt chart. Previously, the API showed +100% when the previous month had zero lessons and excluded some lessons recorded on the selected end date.

Related PRS (if any):

Frontend: #5781

Main changes explained:

• Updated bmNewLessonController.js to return N/A instead of +100% when the previous month's count is zero.
• Fixed end-date filtering to include the entire selected day.
• Updated unit tests to verify both fixes.

How to test:

1. Checkout the Rohit_fix_lessons_mom_percentage branch in HGNRest and HighestGoodNetworkApp.
2. Run npm install if needed, then start the backend using npm run dev and the frontend locally.
3. Navigate to BM Dashboard → Total Construction Summary → Lessons Learned → Lessons Learnt.
4. Select 10/01/2026 – 10/31/2026 and verify that N/A appears when the previous month has zero lessons.
5. Verify that lessons recorded on the selected end date are included.
6. Run the backend controller tests and verify that all 40 tests pass.

Screenshots or videos of changes:

Before:

After:

Note:

• This backend PR should be tested with the corresponding frontend branch, Rohit_fix_lessons_mom_percentage.
• The Unknown Project label is being addressed in separate PRs (Backend #2462 and Frontend #5773).

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud