Final Milestone Individual Contribution: Utku Yiğit Demir

Utku Yiğit Demir (@utkuyigitdemir) (Backend & Web)

1. Responsibilities: Backend and web contributor. Responsible for major final-milestone backend work around discovery filtering (eligibility, categories, rating counts), invitation listing/detail APIs, and full Turkish/English i18n for backend-owned messages. On the web side, responsible for closing dark-mode gaps and responsive regressions across the application. Also wrote the requirements/issue tickets that drove the cross-stack discovery, public-profile, rating-count, advanced-filters, and i18n epics across backend, web, and mobile.

2. Main Contributions:

   • Added Turkish/English localization for all backend-owned messages (validation errors, domain errors, notifications), including a locale middleware, Accept-Language negotiation, an embedded TR/EN catalog, a users.locale column migration, and TR/EN parity tests (#507, PR #580)
   • Split the received-invitations response into pending and past buckets with cursor-based pagination, and added an invitation detail endpoint so the web/mobile invitations inboxes can render per-invitation state (#581, PR #588)
   • Filtered event discovery by viewer age and gender eligibility on the backend so users only see events they can actually join (#501, PR #615)
   • Finished the multi-select category filter on event discovery by accepting a singular category_id alias and aligning the OpenAPI schema with the frontend's emitted query shape (#483, PR #613)
   • Closed the rating-count coverage gap on the discovery card payload so hosts' aggregate rating counts now flow end-to-end (#498, PR #610)
   • Closed dark-mode gaps and responsive regressions across the web app: auth/profile/landing/maps surfaces in the first pass, then a follow-up sweep across profile, event detail, create-event, my-events, tickets, favorites, notifications, and language switcher (~220 selectors total) using the established :root[data-theme='dark'] convention (#631, #650, PR #644, PR #652)
   • Authored the final-milestone cross-stack tickets (backend + web + mobile triplets) that drove the public profile, advanced filters, eligibility-filtered discovery, rating count, and TR/EN localization epics (#495–[#509](https://github.com/bounswe/bounswe2026group 11/issues/509))

3. Significant Issues (Top 3 per category):

   • Code-Related:
     • Issue #507: Add Turkish/English localization support for backend-owned messages — locale middleware, catalog, parity tests, and migration for user locale.
     • Issue #501: Filter discovery results by event gender and age restrictions so viewers only see events they are eligible to join.
     • Issue #581: Split received invitations response into pending and past buckets and add an invitation detail endpoint.
   • Non-Code-Related:
     • Issue #631: Catalogued dark-mode gaps and responsive regressions across the web app with reproduction notes per page; used as the source of truth for the dark-mode follow-up PRs.
     • Issue #650: Audited and documented the remaining dark-mode gaps across profile, event detail, create-event, and list pages found during production walkthroughs after #631.
     • Issue #505 / #506: Specified the advanced-filters UI tickets for web and mobile so the audience-based discovery scenarios (#504) could be picked up by frontend contributors.

4. Pull Requests:

   • Merged (final milestone period):
     • PR #652: fix(frontend): dark mode gaps across profile, event detail, create-event, lists (#650)
     • PR #644: fix(frontend): dark mode gaps and responsive regressions (#631)
     • PR #615: feat(backend): filter discovery by viewer age and gender eligibility (#501)
     • PR #613: feat(backend): finish multi-select category filter on event discovery (#483)
     • PR #610: feat(backend): close rating-count coverage gap on discovery card (#498)
     • PR #588: feat(backend): split received invitations response into pending and past buckets & create invitation detail endpoint (#581)
     • PR #580: feat(backend): add Turkish/English localization for backend-owned messages (#507)
   • Reviewed:
     • PR #646: fix(frontend): improve host event create and edit flows
     • PR #622: feat(frontend-mobile): make gender and birthdate mandatory on sign up
     • PR #583: feat(backend): implement participant reconfirmation state transitions and confirm-attendance API for critical event updates
     • PR #528: feat(backend): add admin role authorization and backoffice read APIs
     • PR #523: feat(backend): implement in-app notification system
     • PR #512: devops(backend): re-structure backend logs and remove fanout logging
     • PR #511: devops(backend): add new relic integration for backend observability

5. AI Transparency & Documentation:

   1. Tool summary:
      1. Claude (Claude Code): Used as the primary agentic coding assistant for both backend Go work (handlers, services, repositories, integration tests) and frontend dark-mode CSS work. Workflow was conversational: describe the issue or feature, let the agent implement and write tests, then iterate on observed issues — including driving Playwright MCP sessions against production to spot dark-mode gaps that did not reproduce locally.
      2. Codex: Used as a secondary code-reading and debugging assistant when triaging cross-stack issues (especially around discovery query shape and invitation pagination cursors) and when reviewing other team members' PRs.
   2. Prompts: No formal prompt log was maintained; the sessions were conversational and not exported in a structured form. The general pattern was: (a) paste or reference the issue body, (b) ask the agent to plan before implementing, (c) implement + add tests, (d) run the suite, (e) iterate on failures or design-intent corrections (e.g., keeping categorical status pills hue-preserving in dark mode rather than desaturating them to neutral gray).

6. Individual Testing Efforts:

   1. backend/internal/i18n/accept_language_test.go, backend/internal/i18n/catalog_test.go, backend/internal/i18n/locale_test.go, backend/internal/i18n/parity_test.go, commit daa5904: Unit tests for the i18n package — Accept-Language header parsing/negotiation, catalog lookups with fallbacks, locale normalization, and a TR/EN parity test that fails the build if a translation key is missing on either side.
   2. backend/internal/adapter/out/httpapi/handler_i18n_test.go, backend/internal/adapter/out/httpapi/locale_middleware_test.go, commit daa5904: Tests for the HTTP locale middleware (resolving locale from header vs. authenticated user preference) and for localized handler error responses.
   3. backend/internal/application/notification/service_i18n_test.go, backend/internal/application/notification/service_test.go, backend/internal/application/profile/service_test.go, commit daa5904: Service-level tests for localized notification message rendering and for the new users.locale profile field round-trip.
   4. backend/tests_integration/audience_attributes_test.go, commit daa5904: Integration coverage exercising the localized validation error responses through the real HTTP stack.
   5. backend/internal/application/invitation/service_test.go, backend/internal/application/invitation/cursor_test.go, commit 102c5d9: Service and cursor tests for the pending/past invitation split — pagination correctness, bucket boundaries, and decoding/encoding of opaque cursors.
   6. backend/tests_integration/invitation_test.go, backend/tests_integration/event_test.go, backend/internal/adapter/out/httpapi/event_handler/event_handler_test.go, commit 102c5d9: End-to-end integration tests for the listing and detail endpoints (GET /invitations?bucket=pending|past, GET /invitations/:id).
   7. backend/tests_integration/event_test.go, commit 1934f30: Integration tests for the eligibility-filtered discovery endpoint, covering age-only restrictions, gender-only restrictions, combined restrictions, and the "viewer has no birthdate/gender" fallthrough cases. (+342 lines.)
   8. backend/tests_integration/event_test.go, commit 0cf078a: Integration assertions verifying host_rating_count appears on the discovery card payload across listing and detail flows. (+131 lines.)
   9. backend/internal/adapter/out/httpapi/event_handler/event_handler_test.go, commit 3fc9858: Handler tests for the category_id singular alias on event discovery, including coexistence with the plural category_ids[] query and OpenAPI-aligned parsing edge cases.
   10. Manual verification suite for PR #644 and PR #652: Playwright MCP walkthroughs against socialeventmapper.com with the seeded production user, capturing before/after screenshots for every flagged page in both dark and light mode to confirm there were no light-mode regressions. Local vitest suite (188/188 in single-fork mode) and tsc -b --noEmit were re-run on each commit.

7. Additional Information: I owned the cross-stack issue planning for the final milestone — most of the "backend + web + mobile" triplets that drove the public profile, advanced filters, eligibility-filtered discovery, rating count, and TR/EN localization epics (#495–[#509](https://github.com/bouns we/bounswe2026group11/issues/509)) were authored by me so that backend, web, and mobile contributors could pick up matching tickets in parallel. During the pre-demo period I performed production walkthroughs against socialeventmapper.com with seeded demo data, which surfaced the dark-mode and responsive regressions tracked under #631 and #650 — both of which I then closed myself with the corresponding fix PRs. I also participated in reviewing infrastructure-level PRs (logging restructure, New Relic integration, admin authorization) to keep the backend stack ready for the final demo.