---
phase: 07-mode-switcher-week-mode
plan: 02
subsystem: ui
tags: [d3, typescript, heatmap, week-mode, aggregation]

requires:
  - phase: 06-renderer-architecture
    provides: ModeRenderer interface, registry, shared color-scale/tooltip/date-utils
  - phase: 07-mode-switcher-week-mode plan 01
    provides: Mode switcher controls, metric toggle, doRender dispatch
provides:
  - WeekModeRenderer aggregating DayEntry data by weekday into 7-cell horizontal heatmap
  - Week mode registered and dispatch-ready via orchestrator
affects: [08-day-mode, 09-combined-mode]

tech-stack:
  added: []
  patterns: [weekday aggregation with dayCount tracking, synthetic DayEntry for color scale domain]

key-files:
  created:
    - assets/src/renderers/week.ts
    - assets/test/week.test.ts
  modified:
    - assets/src/heatmap.ts

key-decisions:
  - "Labels placed centered above each cell (horizontal layout) rather than in a left column (vertical layout) since week mode is a single horizontal row"

patterns-established:
  - "Aggregation renderer pattern: aggregate DayEntry[] -> synthetic DayEntry[] for buildColorScale, render cells from aggregates"

requirements-completed: [VIZ-02, TEST-01]

duration: 4min
completed: 2026-04-09
---

# Phase 7 Plan 02: Week Mode Renderer Summary

**WeekModeRenderer aggregates time entries by weekday into 7 horizontal SVG cells with color scale, metric toggle, and weekStart-aware ordering**

## Performance

- **Duration:** 4 min
- **Started:** 2026-04-09T14:29:19Z
- **Completed:** 2026-04-09T14:33:19Z
- **Tasks:** 1 of 2 (Task 2 is human-verify checkpoint)
- **Files modified:** 3

## Accomplishments
- WeekModeRenderer implements ModeRenderer with aggregateByWeekday logic summing hours/count per weekday
- 7-cell SVG with color scale from buildColorScale, empty cells get heatmap-empty class
- Tooltips show full weekday name with hours-first or count-first format depending on metric
- Labels respect weekStart preference (Monday-first or Sunday-first ordering)
- Registered in heatmap.ts for dispatch via mode switcher
- 14 tests covering aggregation, rendering, tooltips, empty state, label ordering

## Task Commits

Each task was committed atomically:

1. **Task 1 RED: Failing tests for week renderer** - `7fba98f` (test)
2. **Task 1 GREEN+REFACTOR: Week mode renderer implementation** - `9dde529` (feat)

## Files Created/Modified
- `assets/src/renderers/week.ts` - WeekModeRenderer with aggregateByWeekday, 7-cell SVG, tooltips (149 lines)
- `assets/test/week.test.ts` - 14 tests covering mode, rendering, aggregation, tooltips, labels, destroy (178 lines)
- `assets/src/heatmap.ts` - Added WeekModeRenderer import and registration

## Decisions Made
- Labels placed centered above each cell in horizontal layout rather than in a left column, since the 7-cell week view is a single horizontal row
- Used synthetic DayEntry array from non-zero aggregates to feed buildColorScale, keeping color domain based on actual data values

## Deviations from Plan

None - plan executed exactly as written.

## Issues Encountered
None.

## User Setup Required
None - no external service configuration required.

## Next Phase Readiness
- Task 2 (human-verify checkpoint) pending -- requires visual verification in running Kimai instance
- Week mode renderer is code-complete and all tests pass
- Ready for day-mode renderer (phase 08) once visual verification confirms correctness