From 8fac2465a603b5c227634c6b525a0cfd15748822 Mon Sep 17 00:00:00 2001 From: Nuwan Date: Tue, 27 Jan 2026 08:20:11 +0530 Subject: [PATCH] docs(07-02): complete async thunks and api integration plan Phase 7 Plan 2 Summary: - Implemented getChatMessages and sendChatMessage REST API methods - Created fetchChatHistory async thunk with message deduplication - Created sendMessage async thunk with optimistic UI updates - Extracted createOptimisticMessage helper function - 67 total tests passing (14 REST API, 53 Redux slice) - 100% test coverage for all async operations - Followed strict TDD methodology (RED-GREEN-REFACTOR) - 7 commits: 3 RED phases, 3 GREEN phases, 1 REFACTOR phase Updated metadata: - STATE.md: Phase 7 progress 2/3 plans, 40% v1.1 milestone - ROADMAP.md: Marked 07-02 complete - Created 07-02-SUMMARY.md with complete accomplishments Ready for Plan 07-03 (WebSocket Integration & Selectors). Co-Authored-By: Claude Sonnet 4.5 --- .planning/ROADMAP.md | 4 +- .planning/STATE.md | 43 +++-- .../07-chat-infrastructure/07-02-SUMMARY.md | 154 ++++++++++++++++++ 3 files changed, 189 insertions(+), 12 deletions(-) create mode 100644 .planning/phases/07-chat-infrastructure/07-02-SUMMARY.md diff --git a/.planning/ROADMAP.md b/.planning/ROADMAP.md index 4414a511e..2a98cbe4e 100644 --- a/.planning/ROADMAP.md +++ b/.planning/ROADMAP.md @@ -130,7 +130,7 @@ Plans: Plans: - [x] 07-01: Redux Slice & Core Reducers (TDD) - sessionChatSlice with 7 reducers, message deduplication, unread tracking -- [ ] 07-02: Async Thunks & API Integration (TDD) - REST methods, fetchChatHistory, sendMessage with optimistic updates +- [x] 07-02: Async Thunks & API Integration (TDD) - REST methods, fetchChatHistory, sendMessage with optimistic updates - [ ] 07-03: WebSocket Integration & Selectors (TDD) - CHAT_MESSAGE handler, 8 memoized selectors, localStorage persistence #### Phase 8: Chat Window UI & Message Display @@ -182,7 +182,7 @@ Phases execute in numeric order: 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → | 4. JamTrack Research & Design | v1.0 | 2/2 | Complete | 2026-01-14 | | 5. JamTrack Implementation | v1.0 | 5/5 | Complete | 2026-01-14 | | 6. Session Chat Research & Design | v1.1 | 2/2 | Complete | 2026-01-26 | -| 7. Chat Infrastructure & State Management | v1.1 | 1/3 | In progress | 2026-01-27 | +| 7. Chat Infrastructure & State Management | v1.1 | 2/3 | In progress | 2026-01-27 | | 8. Chat Window UI & Message Display | v1.1 | 0/TBD | Not started | - | | 9. Message Composition & Sending | v1.1 | 0/TBD | Not started | - | | 10. Read/Unread Status Management | v1.1 | 0/TBD | Not started | - | diff --git a/.planning/STATE.md b/.planning/STATE.md index 5293f2f55..141357b7c 100644 --- a/.planning/STATE.md +++ b/.planning/STATE.md @@ -9,12 +9,12 @@ See: .planning/PROJECT.md (updated 2026-01-13) ## Current Position -Phase: 6 of 11 (Session Chat Research & Design) -Plan: 06-02 Complete -Status: Phase 6 complete, ready for Phase 7 (Chat Infrastructure & State Management) -Last activity: 2026-01-26 — Plan 2 (React Architecture Design) complete +Phase: 7 of 11 (Chat Infrastructure & State Management) +Plan: 07-02 Complete +Status: Phase 7 in progress (2/3 plans complete), ready for Plan 07-03 (WebSocket Integration) +Last activity: 2026-01-27 — Plan 2 (Async Thunks & API Integration) complete -Progress: ███░░░░░░░ 33% (v1.1) +Progress: ████░░░░░░ 40% (v1.1) ## Performance Metrics @@ -35,9 +35,9 @@ Progress: ███░░░░░░░ 33% (v1.1) | 5 | 5 | 54 min | 10.8 min | **v1.1 Music Session Chat (In Progress):** -- Total plans completed: 2 +- Total plans completed: 4 (Phase 6: 2 plans, Phase 7: 2 plans) - Total phases: 6 (phases 6-11) -- Progress: 33% (Phase 6 complete - 2 plans) +- Progress: 40% (Phase 6 complete, Phase 7 in progress - 2/3 plans) **Recent Trend:** - Last milestone: v1.0 completed 2026-01-14 with excellent velocity @@ -180,6 +180,29 @@ Recent decisions affecting current work: - Deferred features: Server-side read/unread tracking, file attachments, message search/filtering, editing/deletion, typing indicators, emoji picker, multi-channel tabs, notification sounds, desktop notifications - 3 design documents created: CHAT_COMPONENT_DESIGN.md (954 lines), CHAT_REDUX_DESIGN.md (1132 lines), IMPLEMENTATION_ROADMAP.md (1138 lines) +**From Phase 7 Plan 1 (07-chat-infrastructure):** +- Created sessionChatSlice.js with complete initial state structure matching CHAT_REDUX_DESIGN.md +- Implemented 7 reducers using strict TDD: addMessageFromWebSocket, setActiveChannel, openChatWindow, closeChatWindow, markAsRead, incrementUnreadCount, setWindowPosition +- Comprehensive unit test suite with 40 tests and 100% reducer coverage +- Message deduplication logic validated (critical for WebSocket + REST scenario) +- Unread tracking system tested across multi-channel scenarios +- Channel key construction: session uses sessionId directly, lesson uses lessonSessionId, global uses 'global' +- Registered sessionChat slice in Redux store configuration +- Commit history: 6 commits following TDD RED-GREEN phases + +**From Phase 7 Plan 2 (07-chat-infrastructure):** +- REST API methods: getChatMessages (fetch with pagination), sendChatMessage (send to channel) +- Native fetch API used instead of apiFetch wrapper for explicit control over credentials/headers +- fetchChatHistory async thunk: pending/fulfilled/rejected lifecycle with message deduplication and sorting +- sendMessage async thunk: optimistic UI updates with pending (add temp message), fulfilled (replace), rejected (remove) +- createOptimisticMessage helper extracted for code clarity +- Message deduplication prevents duplicates from WebSocket + REST scenario +- Chronological sorting (createdAt ASC) maintains proper message order +- Pagination cursor storage in nextCursors state for infinite scroll +- 67 total tests passing: 14 REST API tests, 53 Redux slice tests +- Test coverage: 100% for all async operations and state transitions +- Commit history: 7 commits following TDD RED-GREEN-REFACTOR phases + ### Deferred Issues **From Phase 3 Plan 3 UAT:** @@ -210,8 +233,8 @@ None yet. ## Session Continuity -Last session: 2026-01-26 -Stopped at: Phase 6 Plan 2 complete (React Architecture Design) +Last session: 2026-01-27 +Stopped at: Phase 7 Plan 2 complete (Async Thunks & API Integration) Resume file: None -**Next:** Phase 7 Plan 1 (Redux Slice & Core Reducers) - Create sessionChatSlice with reducers, implement TDD for state transitions and message deduplication +**Next:** Phase 7 Plan 3 (WebSocket Integration & Selectors) - Implement CHAT_MESSAGE handler, 8 memoized selectors, localStorage persistence for unread counts diff --git a/.planning/phases/07-chat-infrastructure/07-02-SUMMARY.md b/.planning/phases/07-chat-infrastructure/07-02-SUMMARY.md new file mode 100644 index 000000000..6da11ffef --- /dev/null +++ b/.planning/phases/07-chat-infrastructure/07-02-SUMMARY.md @@ -0,0 +1,154 @@ +--- +phase: 07-chat-infrastructure +plan: 02 +type: tdd +status: completed +completedAt: 2026-01-27 +--- + +# Phase 7 Plan 2: Async Thunks & API Integration Summary + +**Implemented REST API methods and async thunks using strict TDD methodology (RED-GREEN-REFACTOR)** + +## Accomplishments + +### Task 1: REST API Client Methods (TDD) +- Added `getChatMessages` and `sendChatMessage` to rest.js using native fetch API +- Comprehensive unit tests with 14 test cases covering all HTTP status codes +- URL construction with URLSearchParams for clean query strings +- Error handling for 403, 404, 422, 500 with proper error messages +- Credentials and headers included for session authentication +- JSDoc comments for API documentation + +### Task 2: fetchChatHistory Async Thunk (TDD) +- Implemented `fetchChatHistory` async thunk with complete lifecycle handling +- Extra reducers for pending, fulfilled, rejected states +- Message deduplication by ID to prevent duplicates from WebSocket + REST +- Chronological sorting (createdAt ASC) maintains message order +- Pagination cursor storage in nextCursors state +- Handles both session and global channels + +### Task 3: sendMessage Async Thunk with Optimistic Updates (TDD) +- Implemented `sendMessage` async thunk with optimistic UI flow +- Pending: Adds optimistic message immediately with temporary ID +- Fulfilled: Replaces optimistic message with real server response +- Rejected: Removes optimistic message and sets error state +- Extracted `createOptimisticMessage` helper for code clarity +- Optimistic messages marked with isOptimistic flag +- Preserves existing messages during replace/remove operations + +## Test Coverage + +**67 total tests passing:** +- 14 REST API tests (getChatMessages: 7, sendChatMessage: 7) +- 53 Redux slice tests: + - 13 initial state tests + - 8 addMessageFromWebSocket tests + - 2 setActiveChannel tests + - 3 openChatWindow tests + - 2 closeChatWindow tests + - 3 markAsRead tests + - 3 incrementUnreadCount tests + - 3 setWindowPosition tests + - 6 fetchChatHistory tests + - 7 sendMessage tests + - 3 integration flow tests + +**Coverage: 100% for all async operations and state transitions** + +## Files Created/Modified + +### Created Files +- `jam-ui/src/helpers/__tests__/rest.test.js` - REST API unit tests (302 lines) + +### Modified Files +- `jam-ui/src/helpers/rest.js` - Added getChatMessages and sendChatMessage methods +- `jam-ui/src/store/features/sessionChatSlice.js` - Added fetchChatHistory and sendMessage async thunks with extra reducers +- `jam-ui/src/store/features/__tests__/sessionChatSlice.test.js` - Added async thunk tests + +## Decisions Made + +### REST API Implementation +Used native fetch API directly instead of apiFetch wrapper to: +- Match test expectations with explicit credentials and headers +- Have direct control over error handling +- Simplify response parsing for chat-specific error formats + +### Message Deduplication Strategy +Implemented in fetchChatHistory to handle scenario where: +- User opens chat and sees messages via WebSocket +- fetchChatHistory called to get history +- Same messages arrive via both channels +- Deduplication prevents duplicate display + +### Optimistic UI Updates +Implemented in sendMessage to provide instant feedback: +- Message appears immediately when user clicks Send +- No waiting for server round-trip (perceived performance) +- Automatically replaced with real message on success +- Automatically removed on error (rollback) + +### Helper Function Extraction +Created `createOptimisticMessage` helper to: +- Centralize optimistic message structure +- Improve code maintainability +- Make testing easier if needed in future +- Keep consistent message format + +## Issues Encountered + +None. TDD methodology caught all issues early: +- Test ordering issue resolved by checking key order independently +- Message sorting requirement identified during deduplication tests +- All edge cases covered by comprehensive test suite + +## Commit History + +**Task 1 commits (REST API):** +- `b6ce5010a` - test(07-02): add failing tests for REST API chat methods (RED) +- `95483da6f` - feat(07-02): implement REST API chat methods getChatMessages and sendChatMessage (GREEN) + +**Task 2 commits (fetchChatHistory):** +- `b0b4ae1a5` - test(07-02): add failing tests for fetchChatHistory async thunk (RED) +- `4f5339d7e` - feat(07-02): implement fetchChatHistory async thunk with extra reducers (GREEN) + +**Task 3 commits (sendMessage):** +- `5d3b6d42e` - test(07-02): add failing tests for sendMessage async thunk with optimistic updates (RED) +- `7729f2767` - feat(07-02): implement sendMessage async thunk with optimistic updates (GREEN) +- `2862e87bc` - refactor(07-02): extract optimistic message creation helper (REFACTOR) + +## TDD Methodology Validation + +Followed strict RED-GREEN-REFACTOR for all three tasks: + +**Task 1 (REST API):** +- RED: 14 failing tests, functions not defined +- GREEN: All tests pass, minimal implementation +- REFACTOR: Code already clean, no changes needed + +**Task 2 (fetchChatHistory):** +- RED: 6 failing tests, thunk not implemented +- GREEN: All tests pass, extra reducers working +- REFACTOR: Code already clean with good separation + +**Task 3 (sendMessage):** +- RED: 7 failing tests, thunk not implemented +- GREEN: All tests pass, optimistic updates working +- REFACTOR: Extracted createOptimisticMessage helper, tests still pass + +## Next Phase Readiness + +**Ready for Plan 07-03 (WebSocket Integration & Selectors):** +- REST API integration complete and tested +- Async thunks fully functional with lifecycle handling +- Message deduplication strategy validated +- Optimistic updates working correctly +- All HTTP error codes handled properly +- Foundation ready for WebSocket handler integration + +**Phase 7 Plan 3 will implement:** +- CHAT_MESSAGE WebSocket handler in useSessionWebSocket +- Protocol Buffer to Redux state conversion +- 8 memoized selectors for efficient state access +- localStorage persistence for unread counts +- Integration tests showing complete WebSocket → Redux flow