feat(stats): count holidays connected to weekends (#68)

src/app/components/calendar-year/calendar-year-planning.spec.ts

@@ -414,6 +414,160 @@ describe('CalendarYear planning outcome boundary', () => {
 		vi.useRealTimers();
 	});
 
+	it.each([
+		{
+			label: 'a Monday holiday directly beside a weekend',
+			start: '2024-05-21',
+			end: '2024-05-22',
+			placed: ['2024-05-21'],
+			expected: 1,
+		},
+		{
+			label: 'a Friday holiday directly beside a weekend',
+			start: '2024-10-31',
+			end: '2024-11-01',
+			placed: ['2024-10-31'],
+			expected: 1,
+		},
+		{
+			label: 'a Tuesday holiday bridged by placed Monday leave',
+			start: '2023-08-14',
+			end: '2023-08-16',
+			placed: ['2023-08-14'],
+			expected: 1,
+		},
+		{
+			label: 'a Tuesday holiday bridged only by a declared Monday',
+			start: '2023-08-14',
+			end: '2023-08-16',
+			declared: ['2023-08-14'],
+			expected: 1,
+		},
+		{
+			label: 'one Wednesday holiday in a completed public-holiday week valued at three',
+			start: '2024-04-29',
+			end: '2024-05-04',
+			declared: ['2024-04-29', '2024-04-30', '2024-05-02', '2024-05-03'],
+			expected: 1,
+			weighted: 3,
+		},
+		{
+			label: 'a weekday-only break without a weekend',
+			start: '2024-04-30',
+			end: '2024-05-02',
+			declared: ['2024-04-30'],
+			expected: 0,
+		},
+		{
+			label: 'a natural long weekend without any placement or declaration',
+			start: '2024-11-01',
+			end: '2024-11-04',
+			expected: 0,
+		},
+		{
+			label: 'a public holiday on Saturday',
+			start: '2021-04-30',
+			end: '2021-05-01',
+			placed: ['2021-04-30'],
+			expected: 0,
+		},
+		{
+			label: 'a public holiday on Sunday',
+			start: '2022-04-29',
+			end: '2022-04-30',
+			placed: ['2022-04-29'],
+			expected: 0,
+		},
+		{
+			label: 'a declaration beside a weekend without a public holiday',
+			start: '2024-06-14',
+			end: '2024-06-15',
+			declared: ['2024-06-14'],
+			expected: 0,
+		},
+		{
+			label: 'a Monday holiday beyond the horizon after Friday leave and its weekend',
+			start: '2024-05-17',
+			end: '2024-05-18',
+			placed: ['2024-05-17'],
+			expected: 1,
+		},
+		{
+			label: 'a Friday holiday before the horizon beside declared Monday leave',
+			start: '2024-11-04',
+			end: '2024-11-05',
+			declared: ['2024-11-04'],
+			expected: 1,
+		},
+		{
+			label: 'two distinct weekday holidays within one break',
+			start: '2024-05-10',
+			end: '2024-05-11',
+			declared: ['2024-05-10'],
+			expected: 2,
+		},
+		{
+			label: 'duplicate holiday date contributions',
+			start: '2024-05-10',
+			end: '2024-05-11',
+			declared: ['2024-05-10'],
+			expected: 2,
+			duplicate: true,
+		},
+	])(
+		'counts public holidays connected to weekends: $label',
+		async ({ start, end, placed = [], declared = [], expected, weighted, duplicate }) => {
+			const core = await import('../../services/leave-planner.core');
+			const outcome = core.calculatePlanningInternal({
+				calculationDate: '2020-01-01',
+				horizon: { start, end },
+				balances: placed.length
+					? [{ id: 'cp', type: 'cp', quantity: placed.length, expiryDate: '2025-12-31' }]
+					: [],
+				rules: placed.map((date) => ({
+					id: date,
+					type: 'time_window',
+					force: 'obligation',
+					startDate: date,
+					endDate: date,
+					placeDays: 1,
+					placeType: 'cp',
+				})),
+				declaredDays: declared.map((date) => ({ date, type: 'other' })),
+			});
+			if (outcome.kind !== 'Plan') throw new Error('Expected a valid plan.');
+			expect(outcome.placements.map(({ date }) => date)).toEqual(placed);
+			if (weighted !== undefined) expect(outcome.metrics.holidayWeekValue).toBe(weighted);
+			if (duplicate)
+				outcome.timeOffPeriods = outcome.timeOffPeriods.map((period) => ({
+					...period,
+					nonWorkingDates: [...period.nonWorkingDates, ...period.nonWorkingDates],
+				}));
+			const { calendar } = calendarFor(outcome);
+			await TestBed.configureTestingModule({
+				imports: [CalendarYear],
+				providers: [
+					provideZonelessChangeDetection(),
+					{ provide: CalendarService, useValue: calendar },
+				],
+			}).compileComponents();
+			TestBed.inject(TranslationService).setLanguage('en');
+			const fixture = TestBed.createComponent(CalendarYear);
+			fixture.detectChanges();
+			await fixture.whenStable();
+			fixture.detectChanges();
+			fixture.nativeElement.querySelector('.statistics-button').click();
+			await fixture.whenStable();
+			const holidayLabel = Array.from(document.querySelectorAll('[role="dialog"] dt')).find(
+				(label) => label.textContent?.includes('Public holidays connected to a weekend'),
+			);
+			expect(holidayLabel?.textContent?.replace(/\s+/g, ' ').trim()).toBe(
+				'Public holidays connected to a weekend (calendar days)',
+			);
+			expect(holidayLabel?.nextElementSibling?.textContent?.trim()).toBe(String(expected));
+		},
+	);
+
 	it.each([
 		{ partial: false, placements: 2 },
 		{ partial: true, placements: 2 },
@@ -428,7 +582,21 @@ describe('CalendarYear planning outcome boundary', () => {
 				...plan,
 				calculationDate: '2024-05-01',
 				placements: placements ? plan.placements : [],
-				declaredDays: [{ date: '2024-05-07', type: 'rtt' }],
+				declaredDays: [
+					{ date: '2024-05-07', type: 'rtt' },
+					{ date: '2024-05-10', type: 'other' },
+				],
+				timeOffPeriods: [
+					{
+						start: '2024-05-08',
+						end: '2024-05-12',
+						duration: 5,
+						placementDates: [],
+						declaredDates: ['2024-05-10'],
+						nonWorkingDates: ['2024-05-08', '2024-05-09', '2024-05-11', '2024-05-12'],
+						nonWorkingDayGain: 4,
+					},
+				],
 				ifThenContributions: [
 					{
 						ruleId: 'original-rule',
@@ -509,6 +677,7 @@ describe('CalendarYear planning outcome boundary', () => {
 				['Longest work sequence (working days)', '6'],
 				['Average time-off period (calendar days)', '2.5'],
 				['Longest time-off period (calendar days)', '4'],
+				['Public holidays connected to a weekend (calendar days)', '2'],
 				['Earned leave before use (days)', '3'],
 				['Original generating rule', '3'],
 			];
@@ -993,8 +1162,8 @@ describe('CalendarYear planning outcome boundary', () => {
 				),
 			).toEqual(
 				allDaysOff
-					? ['0', '4', '—', '0', '9', '9', '0']
-					: ['0', '0', '5', '5', '—', '—', '0'],
+					? ['0', '4', '—', '0', '9', '9', '0', '0']
+					: ['0', '0', '5', '5', '—', '—', '0', '0'],
 			);
 		},
 	);
@@ -1032,18 +1201,19 @@ describe('CalendarYear planning outcome boundary', () => {
 		expect(dialog.getAttribute('aria-labelledby')).toBe('plan-statistics-title');
 		expect(dialog.getAttribute('aria-describedby')).toBe('plan-statistics-help');
 		await vi.waitFor(() => expect(document.activeElement).toBe(dialog.querySelector('h2')));
-		for (const [language, workUnit, calendarUnit] of [
-			['de', 'Arbeitstage', 'Kalendertage'],
-			['es', 'días laborables', 'días naturales'],
-			['fr', 'jours ouvrés', 'jours calendaires'],
+		for (const [language, workUnit, calendarUnit, holidayLabel] of [
+			['de', 'Arbeitstage', 'Kalendertage', 'Feiertage mit Wochenendanschluss'],
+			['es', 'días laborables', 'días naturales', 'Festivos conectados con un fin de semana'],
+			['fr', 'jours ouvrés', 'jours calendaires', 'Jours fériés reliés à un week-end'],
 		]) {
 			translation.setLanguage(language);
 			fixture.detectChanges();
 			expect(dialog.textContent).toContain(workUnit);
 			expect(dialog.textContent).toContain(calendarUnit);
+			expect(dialog.textContent).toContain(holidayLabel);
 			expect(
 				Array.from(dialog.querySelectorAll('dd'), (value) => value.textContent?.trim()),
-			).toEqual(['2', '4', '3,333', '6', '2,5', '4', '0']);
+			).toEqual(['2', '4', '3,333', '6', '2,5', '4', '0', '0']);
 		}
 		expect(dialog.textContent).toContain('Statistiques du planning');
 		expect(dialog.querySelector('dt')?.textContent).toContain('Nouveaux jours de congé posés');
@@ -3339,7 +3509,7 @@ describe('CalendarYear planning outcome boundary', () => {
 			Array.from(document.querySelectorAll('[role="dialog"] dd'), (value) =>
 				value.textContent?.trim(),
 			),
-		).toEqual(['2', '4', '6', '6', '—', '—', '0']);
+		).toEqual(['2', '4', '6', '6', '—', '—', '0', '0']);
 		document.querySelector<HTMLButtonElement>('[role="dialog"] button')!.click();
 		await vi.waitFor(() => expect(document.querySelector('[role="dialog"]')).toBeNull());
 		activateWithKeyboard(afterButton);

src/app/components/calendar-year/calendar-year.html

@@ -1295,6 +1295,14 @@
 					</dt>
 					<dd>{{ formatStatistic(plan.metrics.longestTimeOffPeriod) }}</dd>
 				</div>
+				<div>
+					<dt>
+						{{ tr().planning.statistics.weekendConnectedHolidays }} ({{
+							tr().planning.statistics.calendarDays
+						}})
+					</dt>
+					<dd>{{ formatStatistic(weekendConnectedHolidays()) }}</dd>
+				</div>
 				<div>
 					<dt>
 						{{ tr().planning.statistics.earnedLeave }} ({{

src/app/components/calendar-year/calendar-year.ts

@@ -202,6 +202,20 @@ export class CalendarYear {
 	}
 
 	protected readonly displayedPlan = this.userInput.displayedPlanSignal;
+	protected readonly weekendConnectedHolidays = computed(() => {
+		const isWeekend = (date: string) => {
+			const day = new Date(`${date}T00:00:00Z`).getUTCDay();
+			return day === 0 || day === 6;
+		};
+		// Weekday natural non-working dates are public holidays; declarations are separate.
+		return new Set(
+			(this.displayedPlan()?.timeOffPeriods ?? []).flatMap(({ nonWorkingDates }) =>
+				nonWorkingDates.some(isWeekend)
+					? nonWorkingDates.filter((date) => !isWeekend(date))
+					: [],
+			),
+		).size;
+	});
 	protected readonly earnedLeave = computed(() => {
 		const byRule = new Map<string, { ruleId: string; label: string; quantity: number }>();
 		for (const contribution of this.displayedPlan()?.ifThenContributions ?? []) {