Complete apartment form validation flow (#46)

frontend/src/app/components/apartment-form/apartment-form.css

@@ -30,6 +30,9 @@
 	color: var(--danger);
 	font-size: 0.75rem;
 }
+.required-marker {
+	color: var(--danger);
+}
 @media (min-width: 1180px) {
 	.form-page {
 		max-width: 980px;

frontend/src/app/components/apartment-form/apartment-form.html

@@ -21,7 +21,7 @@
 		class="apartment-form"
 		[attr.aria-busy]="saving()"
 	>
-		@if (saveError()) {
+		@if (showSaveError()) {
 			<div class="alert-error" role="alert">{{ saveError() }}</div>
 		}
 		@if (error()) {
@@ -39,13 +39,16 @@
 				<div class="form-grid">
 					<div class="core-field">
 						<mat-form-field appearance="outline"
-							><mat-label>Nom de l'appartement</mat-label
+							><mat-label
+								>Nom de l'appartement
+								<span class="required-marker" aria-hidden="true">*</span></mat-label
 							><input
 								matInput
 								type="text"
 								id="name"
+								aria-required="true"
 								[formField]="apartmentForm.name"
-								(input)="fieldChanged.emit('name')"
+								(input)="fieldWasChanged('name')"
 								placeholder="T2 Paris 15"
 							/>
 						</mat-form-field>
@@ -55,13 +58,16 @@
 					</div>
 					<div class="core-field">
 						<mat-form-field appearance="outline"
-							><mat-label>Prix d'acquisition</mat-label
+							><mat-label
+								>Prix d'acquisition
+								<span class="required-marker" aria-hidden="true">*</span></mat-label
 							><input
 								matInput
 								type="number"
 								id="purchasePrice"
+								aria-required="true"
 								[formField]="apartmentForm.purchasePrice"
-								(input)="fieldChanged.emit('purchasePrice')"
+								(input)="fieldWasChanged('purchasePrice')"
 								step="any"
 							/>
 							<span matTextSuffix>€</span></mat-form-field
@@ -72,13 +78,16 @@
 					</div>
 					<div class="core-field full-field">
 						<mat-form-field appearance="outline"
-							><mat-label>Adresse complète</mat-label
+							><mat-label
+								>Adresse complète
+								<span class="required-marker" aria-hidden="true">*</span></mat-label
 							><input
 								matInput
 								type="text"
 								id="address"
+								aria-required="true"
 								[formField]="apartmentForm.address"
-								(input)="fieldChanged.emit('address')"
+								(input)="fieldWasChanged('address')"
 								placeholder="45 rue des Entrepreneurs, 75015 Paris"
 							/>
 						</mat-form-field>
@@ -102,13 +111,13 @@
 			<app-apartment-legal-profile-form
 				[legalProfileForm]="apartmentForm.legalProfile"
 				[serverErrors]="saveFieldErrors()"
-				(fieldChanged)="fieldChanged.emit($event)"
+				(fieldChanged)="fieldWasChanged($event)"
 			/>
 			<app-private-area-editor
 				[areas]="apartmentModel().privateAreas"
 				[serverErrors]="saveFieldErrors()"
 				(areasChanged)="setPrivateAreas($event)"
-				(fieldChanged)="fieldChanged.emit($event)"
+				(fieldChanged)="fieldWasChanged($event)"
 			/>
 
 			<div class="form-actions">

frontend/src/app/components/apartment-form/apartment-form.spec.ts

@@ -56,6 +56,71 @@ describe('ApartmentForm', () => {
 		expect(saved).not.toHaveBeenCalled();
 	});
 
+	it('shows every invalid section and focuses the first control in form order', async () => {
+		const fixture = TestBed.createComponent(ApartmentForm);
+		fixture.detectChanges();
+		await fixture.whenStable();
+		const form = fixture.componentInstance;
+		const saved = vi.fn();
+		form.saved.subscribe(saved);
+		form.apartmentModel.set({
+			name: ' ',
+			address: ' ',
+			purchasePrice: 0,
+			description: '',
+			privateAreas: [
+				{ id: 'area-1', family: 'PIECE_PRINCIPALE', subtype: 'OTHER', label: ' ' },
+			],
+			legalProfile: {
+				...emptyApartmentLegalProfile(),
+				habitableSurface: -1,
+				departmentCode: '20',
+			},
+		});
+
+		form.save();
+		fixture.detectChanges();
+		await fixture.whenStable();
+
+		const text = fixture.nativeElement.textContent;
+		expect(saved).not.toHaveBeenCalled();
+		expect(text).toContain('Le nom de l’appartement est obligatoire.');
+		expect(text).toContain('Le prix d’acquisition doit être strictement positif.');
+		expect(text).toContain('L’adresse complète est obligatoire.');
+		expect(text).toContain('Saisissez un département français');
+		expect(text).toContain('La surface habitable doit être positive ou nulle.');
+		expect(text).toContain('Le libellé est obligatoire.');
+		expect(document.activeElement).toBe(fixture.nativeElement.querySelector('#name'));
+	});
+
+	it('clears its client summary when a field is corrected', async () => {
+		const fixture = TestBed.createComponent(ApartmentForm);
+		fixture.detectChanges();
+		await fixture.whenStable();
+		const form = fixture.componentInstance;
+
+		form.save();
+		fixture.nativeElement.querySelector('#name').dispatchEvent(new Event('input'));
+
+		expect(form.error()).toBe('');
+	});
+
+	it('focuses the first mapped server error after a failed save', async () => {
+		const fixture = TestBed.createComponent(ApartmentForm);
+		fixture.detectChanges();
+		await fixture.whenStable();
+
+		fixture.componentRef.setInput('saveFieldErrors', [
+			{ field: 'address', code: 'not_blank' },
+			{ field: 'legalProfile.departmentCodeValid', code: 'assert_true' },
+			{ field: 'privateAreas[0].label', code: 'not_blank' },
+		]);
+		fixture.detectChanges();
+		await fixture.whenStable();
+
+		expect(document.activeElement).toBe(fixture.nativeElement.querySelector('#address'));
+	});
+
 	it('rejects whitespace-only fields before the backend does', () => {
 		const fixture = TestBed.createComponent(ApartmentForm);
 		const form = fixture.componentInstance;
@@ -198,6 +263,34 @@ describe('ApartmentForm', () => {
 		);
 	});
 
+	it('keeps malformed private-area server paths in the generic alert', async () => {
+		const fixture = TestBed.createComponent(ApartmentForm);
+		fixture.componentRef.setInput('saveError', 'Veuillez corriger les champs signalés.');
+		fixture.componentRef.setInput('saveFieldErrors', [
+			{ field: 'privateAreas[].label', code: 'not_blank' },
+			{ field: 'privateAreas[-1].label', code: 'not_blank' },
+		]);
+		fixture.detectChanges();
+		await fixture.whenStable();
+
+		expect(fixture.nativeElement.querySelector('.alert-error').textContent).toContain(
+			'Veuillez corriger les champs signalés.',
+		);
+	});
+
+	it('keeps only unknown server validation failures in the generic alert', async () => {
+		const fixture = TestBed.createComponent(ApartmentForm);
+		fixture.componentRef.setInput('saveError', 'Veuillez corriger les champs signalés.');
+		fixture.componentRef.setInput('saveFieldErrors', [{ field: 'name', code: 'not_blank' }]);
+		fixture.detectChanges();
+		await fixture.whenStable();
+
+		expect(fixture.nativeElement.querySelector('.alert-error')).toBeNull();
+		expect(fixture.nativeElement.textContent).toContain(
+			'Le nom de l’appartement est obligatoire.',
+		);
+	});
+
 	it('emits a trimmed apartment draft when valid', () => {
 		const fixture = TestBed.createComponent(ApartmentForm);
 		const form = fixture.componentInstance;

frontend/src/app/components/apartment-form/apartment-form.ts

@@ -1,4 +1,13 @@
-import { Component, effect, input, output, signal, viewChild } from '@angular/core';
+import {
+	Component,
+	effect,
+	ElementRef,
+	inject,
+	input,
+	output,
+	signal,
+	viewChild,
+} from '@angular/core';
 import { FormsModule } from '@angular/forms';
 import { FormRoot, FormField, form, max, min, required, validate } from '@angular/forms/signals';
 import { MatButtonModule } from '@angular/material/button';
@@ -42,6 +51,7 @@ const serverErrorCodes: Record<CoreField, ReadonlySet<string>> = {
 	styleUrl: './apartment-form.css',
 })
 export class ApartmentForm {
+	private readonly element = inject<ElementRef<HTMLElement>>(ElementRef);
 	readonly apartment = input<Apartment | null>(null);
 	readonly saving = input(false);
 	readonly saveError = input('');
@@ -50,6 +60,7 @@ export class ApartmentForm {
 	readonly saved = output<Apartment>();
 	readonly fieldChanged = output<string>();
 	readonly privateAreaEditor = viewChild(PrivateAreaEditor);
+	private previousServerErrorCount = 0;
 
 	readonly apartmentModel = signal<Apartment>({
 		name: '',
@@ -98,6 +109,13 @@ export class ApartmentForm {
 
 	constructor() {
 		effect(() => this.resetForm(this.apartment()));
+		effect(() => {
+			const errors = this.saveFieldErrors();
+			if (errors.length > this.previousServerErrorCount) {
+				queueMicrotask(() => this.focusFirstInvalid());
+			}
+			this.previousServerErrorCount = errors.length;
+		});
 	}
 
 	save(): void {
@@ -117,7 +135,7 @@ export class ApartmentForm {
 					this.privateAreaEditor()?.validationMessage() ??
 					nameRequiredError,
 			);
-			if (!privateAreasValid) this.privateAreaEditor()?.focusFirstInvalid();
+			queueMicrotask(() => this.focusFirstInvalid());
 			return;
 		}
 
@@ -136,6 +154,19 @@ export class ApartmentForm {
 		this.apartmentModel.update((apartment) => ({ ...apartment, privateAreas }));
 	}
 
+	fieldWasChanged(field: string): void {
+		this.error.set('');
+		this.fieldChanged.emit(field);
+	}
+
+	showSaveError(): boolean {
+		return (
+			Boolean(this.saveError()) &&
+			(this.saveFieldErrors().length === 0 ||
+				this.saveFieldErrors().some((error) => !isInlineServerError(error)))
+		);
+	}
+
 	nameError(): string {
 		return this.fieldError('name', nameRequiredError, this.apartmentForm.name().touched());
 	}
@@ -178,6 +209,67 @@ export class ApartmentForm {
 		);
 	}
 
+	private focusFirstInvalid(): void {
+		if (!this.element.nativeElement.querySelector('form')) return;
+		if (this.nameError()) return this.focus('#name');
+		if (this.purchasePriceError()) return this.focus('#purchasePrice');
+		if (this.addressError()) return this.focus('#address');
+		const legalProfileSelector = this.firstLegalProfileErrorSelector();
+		if (legalProfileSelector) return this.focus(legalProfileSelector);
+		this.privateAreaEditor()?.focusFirstInvalid();
+	}
+
+	private firstLegalProfileErrorSelector(): string {
+		const profile = this.apartmentModel().legalProfile;
+		if (
+			this.hasLegalServerError('legalProfile.departmentCodeValid') ||
+			!isFrenchDepartmentCode(profile.departmentCode)
+		) {
+			return '#departmentCode';
+		}
+		if (this.hasLegalServerError('legalProfile.constructionPeriodValid')) {
+			return '#constructionPeriod';
+		}
+		if (
+			this.hasLegalServerError('legalProfile.habitableSurface', 'positive_or_zero') ||
+			(profile.habitableSurface !== null && profile.habitableSurface < 0)
+		) {
+			return '#habitableSurface';
+		}
+		if (this.hasLegalServerError('legalProfile.energyRatingValid')) return '#energyRating';
+		if (
+			this.hasLegalServerError(
+				'legalProfile.estimatedAnnualEnergyCost',
+				'positive_or_zero',
+			) ||
+			(profile.estimatedAnnualEnergyCost !== null && profile.estimatedAnnualEnergyCost < 0)
+		) {
+			return '#estimatedAnnualEnergyCost';
+		}
+		if (
+			this.hasLegalServerError('legalProfile.referenceYearPresentWhenEnergyCostIsProvided') ||
+			this.hasLegalServerError(
+				'legalProfile.referenceYearWithinBoundsWhenEnergyCostIsProvided',
+			) ||
+			(profile.estimatedAnnualEnergyCost !== null &&
+				(profile.estimatedAnnualEnergyCostReferenceYear === null ||
+					profile.estimatedAnnualEnergyCostReferenceYear < 1900 ||
+					profile.estimatedAnnualEnergyCostReferenceYear > 2100))
+		) {
+			return '#estimatedAnnualEnergyCostReferenceYear';
+		}
+		return '';
+	}
+
+	private hasLegalServerError(field: string, code = 'assert_true'): boolean {
+		return this.saveFieldErrors().some((error) => error.field === field && error.code === code);
+	}
+
+	private focus(selector: string): void {
+		const control = this.element.nativeElement.querySelector(selector);
+		if (control instanceof HTMLElement) control.focus();
+	}
+
 	private resetForm(apartment: Apartment | null): void {
 		this.apartmentModel.set({
 			id: apartment?.id,
@@ -213,6 +305,46 @@ export class ApartmentForm {
 	}
 }
 
+function isInlineServerError(error: FieldValidationError): boolean {
+	if ((error.field === 'name' || error.field === 'address') && error.code === 'not_blank') {
+		return true;
+	}
+	if (error.field === 'purchasePrice' && error.code === 'positive') return true;
+	if (
+		(error.field === 'legalProfile.habitableSurface' ||
+			error.field === 'legalProfile.estimatedAnnualEnergyCost') &&
+		error.code === 'positive_or_zero'
+	) {
+		return true;
+	}
+	if (
+		(error.field === 'legalProfile.referenceYearPresentWhenEnergyCostIsProvided' ||
+			error.field === 'legalProfile.referenceYearWithinBoundsWhenEnergyCostIsProvided' ||
+			error.field === 'legalProfile.departmentCodeValid' ||
+			error.field === 'legalProfile.constructionPeriodValid' ||
+			error.field === 'legalProfile.energyRatingValid') &&
+		error.code === 'assert_true'
+	) {
+		return true;
+	}
+	const privateArea = privateAreaField(error.field);
+	return (
+		privateArea !== null &&
+		((privateArea === 'label' && error.code === 'not_blank') ||
+			((privateArea === 'family' || privateArea === 'subtype') &&
+				error.code === 'not_null') ||
+			(privateArea === 'subtypeCompatibleWithFamily' && error.code === 'assert_true'))
+	);
+}
+
+function privateAreaField(path: string): string | null {
+	if (!path.startsWith('privateAreas[')) return null;
+	const fieldOffset = path.indexOf('].');
+	if (fieldOffset === -1) return null;
+	const index = path.slice('privateAreas['.length, fieldOffset);
+	return index && digits(index) ? path.slice(fieldOffset + 2) : null;
+}
+
 function isFrenchDepartmentCode(value: string): boolean {
 	const code = value.trim().toUpperCase();
 	if (!code) return true;

frontend/src/app/components/apartment-legal-profile-form/apartment-legal-profile-form.html

@@ -1,7 +1,7 @@
 <section class="form-section" aria-labelledby="legal-heading">
 	<div class="section-heading">
 		<h2 id="legal-heading">Identification juridique</h2>
-		<p>Ces champs facultatifs seront réutilisés dans les baux.</p>
+		<p>Ce profil juridique est facultatif ; ses données seront réutilisées dans les baux.</p>
 	</div>
 	<div class="form-grid">
 		<mat-form-field appearance="outline"
@@ -53,6 +53,9 @@
 				<mat-option value="AFTER_2012">Après 2012</mat-option>
 			</mat-select></mat-form-field
 		>
+		@if (constructionPeriodError()) {
+			<p class="field-error" role="alert">{{ constructionPeriodError() }}</p>
+		}
 		<mat-form-field appearance="outline" class="full-field"
 			><mat-label>Régime juridique de l'immeuble</mat-label
 			><input
@@ -100,6 +103,9 @@
 				}
 			</mat-select></mat-form-field
 		>
+		@if (energyRatingError()) {
+			<p class="field-error" role="alert">{{ energyRatingError() }}</p>
+		}
 		<div class="legal-profile-field">
 			<mat-form-field appearance="outline"
 				><mat-label>Coût annuel énergétique estimé</mat-label

frontend/src/app/components/apartment-legal-profile-form/apartment-legal-profile-form.ts

@@ -77,6 +77,22 @@ export class ApartmentLegalProfileForm {
 				);
 	}
 
+	constructionPeriodError(): string {
+		return this.serverError(
+			'legalProfile.constructionPeriodValid',
+			['assert_true'],
+			'La période de construction est invalide.',
+		);
+	}
+
+	energyRatingError(): string {
+		return this.serverError(
+			'legalProfile.energyRatingValid',
+			['assert_true'],
+			'La classe énergétique est invalide.',
+		);
+	}
+
 	private serverError(field: string, codes: readonly string[], message: string): string {
 		return this.serverErrors().some(
 			(error) => error.field === field && codes.includes(error.code),

frontend/src/app/components/private-area-editor/private-area-editor.html

@@ -35,6 +35,7 @@
 									<mat-label>Famille</mat-label>
 									<mat-select
 										required
+										class="private-area-family"
 										[value]="area.family"
 										(selectionChange)="
 											updateArea(area.id, 'family', $event.value)
@@ -58,6 +59,7 @@
 									<mat-label>Sous-type</mat-label>
 									<mat-select
 										required
+										class="private-area-subtype"
 										[value]="area.subtype"
 										(selectionChange)="
 											updateArea(area.id, 'subtype', $event.value)

frontend/src/app/components/private-area-editor/private-area-editor.ts

@@ -112,12 +112,8 @@ export class PrivateAreaEditor {
 	}
 
 	focusFirstInvalid(): void {
-		const index = this.areas().findIndex((area) => !area.label.trim());
-		if (index === -1) return;
-		queueMicrotask(() => {
-			const label = this.element.nativeElement.querySelectorAll('.private-area-label')[index];
-			if (label instanceof HTMLInputElement) label.focus();
-		});
+		const control = this.firstInvalidControl();
+		if (control instanceof HTMLElement) control.focus();
 	}
 
 	labelError(index: number, area: PrivateArea): string {
@@ -154,6 +150,20 @@ export class PrivateAreaEditor {
 		return this.serverErrors().some((error) => error.field === field && error.code === code);
 	}
 
+	private firstInvalidControl(): HTMLElement | null {
+		for (const [index, area] of this.areas().entries()) {
+			if (this.familyError(index)) return this.control('.private-area-family', index);
+			if (this.subtypeError(index)) return this.control('.private-area-subtype', index);
+			if (this.labelError(index, area)) return this.control('.private-area-label', index);
+		}
+		return null;
+	}
+
+	private control(selector: string, index: number): HTMLElement | null {
+		const control = this.element.nativeElement.querySelectorAll(selector)[index];
+		return control instanceof HTMLElement ? control : null;
+	}
+
 	private fieldPath(index: number, field: keyof Omit<PrivateArea, 'id'>): string {
 		return `privateAreas[${index}].${field}`;
 	}