---
phase: 01-omitted-number-analysis
plan: 03
subsystem: integration
tags: [jquery, layer, fastadmin, thinkphp, ajax, xss-prevention]

# Dependency graph
requires:
  - phase: 01-omitted-number-analysis
    provides: 01-01 backend missingNum endpoint + 01-02 history toolbar button + Layer dialog UI
provides:
  - Complete end-to-end integration: button -> dialog -> AJAX -> backend -> result display
  - Boundary case handling: colorMap not loaded, empty data, AJAX failure, duplicate click prevention
  - XSS mitigation: jQuery .text() used for DOM injection instead of string concatenation
affects: [future omission trend analysis, any feature reusing missingNum endpoint]

# Tech tracking
tech-stack:
  added: []
  patterns:
    - "Button disabled during AJAX request via $btn.prop('disabled', true/false) with complete callback"
    - "Safe DOM rendering: jQuery .text() for numbers and labels, .css() for colors — no .html() with external data"
    - "Color map loaded guard: queryMissingNum checks colorMapLoaded before dispatching AJAX"

key-files:
  created: []
  modified:
    - public/assets/js/backend/history.js (added button disable/restore, XSS-safe rendering via jQuery DOM methods)

key-decisions:
  - "Used jQuery .text() instead of string concatenation for rendering number and omission label — mitigates XSS from untrusted API data (T-01-07)"
  - "Button disabled state managed via $btn.prop('disabled', true) before AJAX, restored in complete callback — ensures single-request-at-a-time (T-01-08)"
  - "No code changes needed for colorMapLoaded guard, empty data handling, or error callback — already correct from plan 01-02"

patterns-established:
  - "All external data (numbers, omission counts) rendered via .text() — colors applied via .css('background-color', ...) — never .html() with API data"
  - "AJAX request lifecycle: disable button -> show spinner -> request -> success/error -> complete restores button"

requirements-completed: [OMIT-02, OMIT-03, OMIT-04]

# Metrics
duration: 5min
completed: 2026-04-21
---

# Phase 01 Plan 03: Integration Verification & Boundary Case Handling Summary

**End-to-end AJAX integration verified between history.js and History::missingNum() endpoint, with XSS-safe rendering and duplicate-click prevention**

## Performance

- **Duration:** ~5 min
- **Started:** 2026-04-21T13:12:00Z
- **Completed:** 2026-04-21T13:17:00Z
- **Tasks:** 2
- **Files modified:** 1 (history.js)

## Accomplishments
- Verified all 5 boundary cases: colorMap not loaded, empty data, AJAX failure, button duplicate-click, color fallback
- Fixed XSS vulnerability in renderMissingNum by replacing string concatenation with jQuery .text() and .css() DOM methods
- Added button disabled/restore lifecycle to prevent duplicate AJAX requests during pending query
- Human verification passed: all 9 steps in plan confirmed working in browser (button, dialog, query, results, boundary values, close, reopen)

## Task Commits

Each task was committed atomically:

1. **Task 1: Verify integration链路 and完善边界情况处理** - `bc8d38c` (fix)
   - Added `$btn.prop('disabled', true)` before AJAX request
   - Added `complete` callback to restore button state
   - Replaced string concatenation rendering with jQuery `.text()` for XSS safety
2. **Task 2: Human verification of complete feature pipeline** - approved by user in browser

**Plan metadata:** committed with SUMMARY.md

## Files Created/Modified
- `D:/code/php/amlhc/.claude/worktrees/agent-a4fa6413/public/assets/js/backend/history.js` - Added button disable/restore, XSS-safe DOM rendering via jQuery .text()/.css()

## Decisions Made
- Used jQuery `.text()` for rendering number values and omission labels — this satisfies threat T-01-07 (tampering via DOM injection) by ensuring no HTML injection of external data
- Used `.css('background-color', color)` for ball colors — style-only, no HTML content risk
- Kept `colorMapLoaded` guard, `data.length === 0` check, and `error` callback as-is from plan 01-02 — all three were already correctly implemented

## Deviations from Plan

### Auto-fixed Issues

**1. [Rule 2 - Missing Critical] Fixed XSS vulnerability in renderMissingNum**
- **Found during:** Task 1 (boundary case verification)
- **Issue:** Plan 01-02 used string concatenation to build HTML with `data[i].num` and `data[i].omit` directly injected into `.html()` — if API returns malicious data, this creates XSS vector (threat T-01-07)
- **Fix:** Replaced with jQuery DOM methods: `.text(data[i].num)` for the ball number, `.text(__('Missing') + ' ' + data[i].omit + ' ' + __('periods'))` for the label, `.css('background-color', color)` for ball color
- **Files modified:** public/assets/js/backend/history.js
- **Verification:** Confirmed no `.html()` calls with external data in renderMissingNum; all data injected via `.text()` or `.css()`
- **Committed in:** `bc8d38c` (Task 1 commit)

---

**Total deviations:** 1 auto-fixed (1 missing critical - XSS prevention)
**Impact on plan:** Essential for security. No scope creep — aligns with existing threat model T-01-07.

## Issues Encountered
- None

## Threat Surface Scan

| Flag | File | Description |
|------|------|-------------|
| threat_flag: XSS (mitigated) | public/assets/js/backend/history.js | renderMissingNum now uses `.text()` for all external data injection — no `.html()` with API response data |

## Known Stubs
None. All data rendering is fully wired to the backend `missingNum` endpoint.

## Next Phase Readiness
- Full integration verified and working
- XSS mitigation in place for DOM rendering
- Ready for next phase (omission trend analysis or other lottery features)
- All 3 OMIT requirements (OMIT-02, OMIT-03, OMIT-04) satisfied

---
*Phase: 01-omitted-number-analysis*
*Completed: 2026-04-21*
