From de98924fd392028c2cb93d7802f9b557b639ad27 Mon Sep 17 00:00:00 2001
From: Matthieu <mtholot19@gmail.com>
Date: Thu, 21 May 2026 14:45:14 +0200
Subject: [PATCH] feat(absences) : fondation backend du module de gestion des
 absences
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Module type Payfit (étapes 1+2 de la spec V1) : demande d'absence, validation
admin, soldes à jour.

- Enums : AbsenceType, AbsenceStatus, HalfDay, ContractType, FamilySituation
- Entités : AbsencePolicy, AbsenceBalance, AbsenceRequest + champs RH sur User
- Services : PublicHolidayProvider (fériés FR métropole en PHP pur, Computus),
  AbsenceDayCalculator (décompte jours ouvrés/ouvrables + demi-journées, TDD),
  AbsenceBalanceService (périodes + pending/taken/recrédit)
- API Platform : providers/processors (création, approve/reject/cancel) + RBAC
  me/admin, contrôleurs preview (dry-run), upload/download justificatif, calendrier
- Migrations : une par table + colonnes RH user (DEFAULT puis DROP DEFAULT)
- Fixtures : 5 policies par défaut, salariés démo, soldes et demandes
- Tests unitaires : PublicHolidayProvider, AbsenceDayCalculator (12 tests)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
---
 config/services.yaml                          |   9 +
 migrations/Version20260521123520.php          |  42 +++
 migrations/Version20260521123521.php          |  49 +++
 migrations/Version20260521123522.php          |  64 ++++
 migrations/Version20260521123523.php          |  59 ++++
 .../Absence/AbsenceCalendarController.php     |  43 +++
 ...AbsenceJustificationDownloadController.php |  64 ++++
 .../AbsenceJustificationUploadController.php  |  86 +++++
 .../Absence/AbsencePreviewController.php      |  95 +++++
 src/DataFixtures/AppFixtures.php              | 107 ++++++
 src/Entity/AbsenceBalance.php                 | 163 +++++++++
 src/Entity/AbsencePolicy.php                  | 171 +++++++++
 src/Entity/AbsenceRequest.php                 | 326 ++++++++++++++++++
 src/Entity/User.php                           | 176 +++++++++-
 src/Enum/AbsenceStatus.php                    |  23 ++
 src/Enum/AbsenceType.php                      |  34 ++
 src/Enum/ContractType.php                     |  25 ++
 src/Enum/FamilySituation.php                  |  25 ++
 src/Enum/HalfDay.php                          |  19 +
 src/Repository/AbsenceBalanceRepository.php   |  31 ++
 src/Repository/AbsencePolicyRepository.php    |  26 ++
 src/Repository/AbsenceRequestRepository.php   |  74 ++++
 src/Service/AbsenceBalanceService.php         | 122 +++++++
 src/Service/AbsenceDayCalculator.php          |  73 ++++
 src/Service/PublicHolidayProvider.php         |  86 +++++
 src/State/AbsenceBalanceProvider.php          |  73 ++++
 src/State/AbsenceCancelProcessor.php          |  75 ++++
 src/State/AbsenceRequestProcessor.php         |  91 +++++
 src/State/AbsenceRequestProvider.php          |  82 +++++
 src/State/AbsenceReviewProcessor.php          |  80 +++++
 .../Unit/Service/AbsenceDayCalculatorTest.php |  92 +++++
 .../Service/PublicHolidayProviderTest.php     |  72 ++++
 32 files changed, 2554 insertions(+), 3 deletions(-)
 create mode 100644 migrations/Version20260521123520.php
 create mode 100644 migrations/Version20260521123521.php
 create mode 100644 migrations/Version20260521123522.php
 create mode 100644 migrations/Version20260521123523.php
 create mode 100644 src/Controller/Absence/AbsenceCalendarController.php
 create mode 100644 src/Controller/Absence/AbsenceJustificationDownloadController.php
 create mode 100644 src/Controller/Absence/AbsenceJustificationUploadController.php
 create mode 100644 src/Controller/Absence/AbsencePreviewController.php
 create mode 100644 src/Entity/AbsenceBalance.php
 create mode 100644 src/Entity/AbsencePolicy.php
 create mode 100644 src/Entity/AbsenceRequest.php
 create mode 100644 src/Enum/AbsenceStatus.php
 create mode 100644 src/Enum/AbsenceType.php
 create mode 100644 src/Enum/ContractType.php
 create mode 100644 src/Enum/FamilySituation.php
 create mode 100644 src/Enum/HalfDay.php
 create mode 100644 src/Repository/AbsenceBalanceRepository.php
 create mode 100644 src/Repository/AbsencePolicyRepository.php
 create mode 100644 src/Repository/AbsenceRequestRepository.php
 create mode 100644 src/Service/AbsenceBalanceService.php
 create mode 100644 src/Service/AbsenceDayCalculator.php
 create mode 100644 src/Service/PublicHolidayProvider.php
 create mode 100644 src/State/AbsenceBalanceProvider.php
 create mode 100644 src/State/AbsenceCancelProcessor.php
 create mode 100644 src/State/AbsenceRequestProcessor.php
 create mode 100644 src/State/AbsenceRequestProvider.php
 create mode 100644 src/State/AbsenceReviewProcessor.php
 create mode 100644 tests/Unit/Service/AbsenceDayCalculatorTest.php
 create mode 100644 tests/Unit/Service/PublicHolidayProviderTest.php

diff --git a/config/services.yaml b/config/services.yaml
index f2713cc..1708a92 100644
--- a/config/services.yaml
+++ b/config/services.yaml
@@ -9,6 +9,7 @@
 parameters:
     task_document_upload_dir: '%kernel.project_dir%/var/uploads/documents'
     avatar_upload_dir: '%kernel.project_dir%/var/uploads/avatars'
+    absence_justification_upload_dir: '%kernel.project_dir%/var/uploads/justificatifs'
 
 imports:
     - { resource: version.yaml }
@@ -44,3 +45,11 @@ services:
     App\Controller\UserAvatarController:
         arguments:
             $avatarUploadDir: '%avatar_upload_dir%'
+
+    App\Controller\Absence\AbsenceJustificationUploadController:
+        arguments:
+            $uploadDir: '%absence_justification_upload_dir%'
+
+    App\Controller\Absence\AbsenceJustificationDownloadController:
+        arguments:
+            $uploadDir: '%absence_justification_upload_dir%'
diff --git a/migrations/Version20260521123520.php b/migrations/Version20260521123520.php
new file mode 100644
index 0000000..8a5fe59
--- /dev/null
+++ b/migrations/Version20260521123520.php
@@ -0,0 +1,42 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+/**
+ * Absence management: create the absence_policy table.
+ */
+final class Version20260521123520 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return 'Create absence_policy table';
+    }
+
+    public function up(Schema $schema): void
+    {
+        $this->addSql(<<<'SQL'
+                CREATE TABLE absence_policy (
+                  id INT GENERATED BY DEFAULT AS IDENTITY NOT NULL,
+                  type VARCHAR(32) NOT NULL,
+                  days_per_year DOUBLE PRECISION DEFAULT NULL,
+                  days_per_event DOUBLE PRECISION DEFAULT NULL,
+                  justification_required BOOLEAN NOT NULL,
+                  notice_days INT NOT NULL,
+                  count_working_days_only BOOLEAN NOT NULL,
+                  active BOOLEAN NOT NULL,
+                  PRIMARY KEY (id)
+                )
+            SQL);
+        $this->addSql('CREATE UNIQUE INDEX uniq_absence_policy_type ON absence_policy (type)');
+    }
+
+    public function down(Schema $schema): void
+    {
+        $this->addSql('DROP TABLE absence_policy');
+    }
+}
diff --git a/migrations/Version20260521123521.php b/migrations/Version20260521123521.php
new file mode 100644
index 0000000..ea7f4fb
--- /dev/null
+++ b/migrations/Version20260521123521.php
@@ -0,0 +1,49 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+/**
+ * Absence management: create the absence_balance table.
+ */
+final class Version20260521123521 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return 'Create absence_balance table';
+    }
+
+    public function up(Schema $schema): void
+    {
+        $this->addSql(<<<'SQL'
+                CREATE TABLE absence_balance (
+                  id INT GENERATED BY DEFAULT AS IDENTITY NOT NULL,
+                  type VARCHAR(32) NOT NULL,
+                  period VARCHAR(16) NOT NULL,
+                  acquired DOUBLE PRECISION NOT NULL,
+                  taken DOUBLE PRECISION NOT NULL,
+                  pending DOUBLE PRECISION NOT NULL,
+                  user_id INT NOT NULL,
+                  PRIMARY KEY (id)
+                )
+            SQL);
+        $this->addSql('CREATE INDEX IDX_65723A76A76ED395 ON absence_balance (user_id)');
+        $this->addSql('CREATE UNIQUE INDEX uniq_absence_balance_user_type_period ON absence_balance (user_id, type, period)');
+        $this->addSql(<<<'SQL'
+                ALTER TABLE
+                  absence_balance
+                ADD
+                  CONSTRAINT FK_65723A76A76ED395 FOREIGN KEY (user_id) REFERENCES "user" (id) ON DELETE CASCADE NOT DEFERRABLE
+            SQL);
+    }
+
+    public function down(Schema $schema): void
+    {
+        $this->addSql('ALTER TABLE absence_balance DROP CONSTRAINT FK_65723A76A76ED395');
+        $this->addSql('DROP TABLE absence_balance');
+    }
+}
diff --git a/migrations/Version20260521123522.php b/migrations/Version20260521123522.php
new file mode 100644
index 0000000..c41736b
--- /dev/null
+++ b/migrations/Version20260521123522.php
@@ -0,0 +1,64 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+/**
+ * Absence management: create the absence_request table.
+ */
+final class Version20260521123522 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return 'Create absence_request table';
+    }
+
+    public function up(Schema $schema): void
+    {
+        $this->addSql(<<<'SQL'
+                CREATE TABLE absence_request (
+                  id INT GENERATED BY DEFAULT AS IDENTITY NOT NULL,
+                  type VARCHAR(32) NOT NULL,
+                  start_date DATE NOT NULL,
+                  end_date DATE NOT NULL,
+                  start_half_day VARCHAR(16) DEFAULT NULL,
+                  end_half_day VARCHAR(16) DEFAULT NULL,
+                  counted_days DOUBLE PRECISION NOT NULL,
+                  reason TEXT DEFAULT NULL,
+                  justification_file_name VARCHAR(255) DEFAULT NULL,
+                  status VARCHAR(16) NOT NULL,
+                  rejection_reason TEXT DEFAULT NULL,
+                  created_at TIMESTAMP(0) WITHOUT TIME ZONE NOT NULL,
+                  reviewed_at TIMESTAMP(0) WITHOUT TIME ZONE DEFAULT NULL,
+                  user_id INT NOT NULL,
+                  reviewed_by_id INT DEFAULT NULL,
+                  PRIMARY KEY (id)
+                )
+            SQL);
+        $this->addSql('CREATE INDEX IDX_F211AA17A76ED395 ON absence_request (user_id)');
+        $this->addSql('CREATE INDEX IDX_F211AA17FC6B21F1 ON absence_request (reviewed_by_id)');
+        $this->addSql(<<<'SQL'
+                ALTER TABLE
+                  absence_request
+                ADD
+                  CONSTRAINT FK_F211AA17A76ED395 FOREIGN KEY (user_id) REFERENCES "user" (id) ON DELETE CASCADE NOT DEFERRABLE
+            SQL);
+        $this->addSql(<<<'SQL'
+                ALTER TABLE
+                  absence_request
+                ADD
+                  CONSTRAINT FK_F211AA17FC6B21F1 FOREIGN KEY (reviewed_by_id) REFERENCES "user" (id) ON DELETE SET NULL NOT DEFERRABLE
+            SQL);
+    }
+
+    public function down(Schema $schema): void
+    {
+        $this->addSql('ALTER TABLE absence_request DROP CONSTRAINT FK_F211AA17A76ED395');
+        $this->addSql('ALTER TABLE absence_request DROP CONSTRAINT FK_F211AA17FC6B21F1');
+        $this->addSql('DROP TABLE absence_request');
+    }
+}
diff --git a/migrations/Version20260521123523.php b/migrations/Version20260521123523.php
new file mode 100644
index 0000000..0cbb8d1
--- /dev/null
+++ b/migrations/Version20260521123523.php
@@ -0,0 +1,59 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+/**
+ * Absence management: add HR fields to the user table.
+ *
+ * Columns are created with DEFAULTs so the migration applies cleanly on an
+ * already-populated user table (production).
+ */
+final class Version20260521123523 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return 'Add HR / absence fields to user';
+    }
+
+    public function up(Schema $schema): void
+    {
+        $this->addSql('ALTER TABLE "user" ADD is_employee BOOLEAN NOT NULL DEFAULT false');
+        $this->addSql('ALTER TABLE "user" ADD hire_date DATE DEFAULT NULL');
+        $this->addSql('ALTER TABLE "user" ADD end_date DATE DEFAULT NULL');
+        $this->addSql('ALTER TABLE "user" ADD contract_type VARCHAR(16) DEFAULT NULL');
+        $this->addSql('ALTER TABLE "user" ADD work_time_ratio DOUBLE PRECISION NOT NULL DEFAULT 1.0');
+        $this->addSql('ALTER TABLE "user" ADD annual_leave_days DOUBLE PRECISION NOT NULL DEFAULT 25.0');
+        $this->addSql("ALTER TABLE \"user\" ADD reference_period_start VARCHAR(5) NOT NULL DEFAULT '06-01'");
+        $this->addSql('ALTER TABLE "user" ADD initial_leave_balance DOUBLE PRECISION NOT NULL DEFAULT 0');
+        $this->addSql('ALTER TABLE "user" ADD family_situation VARCHAR(16) DEFAULT NULL');
+        $this->addSql('ALTER TABLE "user" ADD nb_children INT NOT NULL DEFAULT 0');
+
+        // Defaults were only needed to backfill existing rows; the ORM mapping
+        // carries no DB default, so drop them to keep the schema in sync.
+        $this->addSql('ALTER TABLE "user" ALTER is_employee DROP DEFAULT');
+        $this->addSql('ALTER TABLE "user" ALTER work_time_ratio DROP DEFAULT');
+        $this->addSql('ALTER TABLE "user" ALTER annual_leave_days DROP DEFAULT');
+        $this->addSql('ALTER TABLE "user" ALTER reference_period_start DROP DEFAULT');
+        $this->addSql('ALTER TABLE "user" ALTER initial_leave_balance DROP DEFAULT');
+        $this->addSql('ALTER TABLE "user" ALTER nb_children DROP DEFAULT');
+    }
+
+    public function down(Schema $schema): void
+    {
+        $this->addSql('ALTER TABLE "user" DROP is_employee');
+        $this->addSql('ALTER TABLE "user" DROP hire_date');
+        $this->addSql('ALTER TABLE "user" DROP end_date');
+        $this->addSql('ALTER TABLE "user" DROP contract_type');
+        $this->addSql('ALTER TABLE "user" DROP work_time_ratio');
+        $this->addSql('ALTER TABLE "user" DROP annual_leave_days');
+        $this->addSql('ALTER TABLE "user" DROP reference_period_start');
+        $this->addSql('ALTER TABLE "user" DROP initial_leave_balance');
+        $this->addSql('ALTER TABLE "user" DROP family_situation');
+        $this->addSql('ALTER TABLE "user" DROP nb_children');
+    }
+}
diff --git a/src/Controller/Absence/AbsenceCalendarController.php b/src/Controller/Absence/AbsenceCalendarController.php
new file mode 100644
index 0000000..aec8f07
--- /dev/null
+++ b/src/Controller/Absence/AbsenceCalendarController.php
@@ -0,0 +1,43 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Controller\Absence;
+
+use App\Repository\AbsenceRequestRepository;
+use DateTimeImmutable;
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\JsonResponse;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpKernel\Exception\UnprocessableEntityHttpException;
+use Symfony\Component\Routing\Attribute\Route;
+use Symfony\Component\Security\Http\Attribute\IsGranted;
+
+/**
+ * Admin calendar view: all pending/approved absences overlapping a date range.
+ */
+class AbsenceCalendarController extends AbstractController
+{
+    public function __construct(
+        private readonly AbsenceRequestRepository $requestRepository,
+    ) {}
+
+    #[Route('/api/admin/absences/calendar', name: 'absence_calendar', methods: ['GET'], priority: 1)]
+    #[IsGranted('ROLE_ADMIN')]
+    public function __invoke(Request $request): JsonResponse
+    {
+        $fromRaw = (string) $request->query->get('from', '');
+        $toRaw   = (string) $request->query->get('to', '');
+
+        if ('' === $fromRaw || '' === $toRaw) {
+            throw new UnprocessableEntityHttpException('Query parameters "from" and "to" are required.');
+        }
+
+        $from = new DateTimeImmutable($fromRaw);
+        $to   = new DateTimeImmutable($toRaw);
+
+        $absences = $this->requestRepository->findInRange($from, $to);
+
+        return $this->json($absences, context: ['groups' => ['absence_request:read']]);
+    }
+}
diff --git a/src/Controller/Absence/AbsenceJustificationDownloadController.php b/src/Controller/Absence/AbsenceJustificationDownloadController.php
new file mode 100644
index 0000000..3a48dd8
--- /dev/null
+++ b/src/Controller/Absence/AbsenceJustificationDownloadController.php
@@ -0,0 +1,64 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Controller\Absence;
+
+use App\Entity\AbsenceRequest;
+use Doctrine\ORM\EntityManagerInterface;
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Bundle\SecurityBundle\Security;
+use Symfony\Component\HttpFoundation\BinaryFileResponse;
+use Symfony\Component\HttpFoundation\ResponseHeaderBag;
+use Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException;
+use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
+use Symfony\Component\Routing\Attribute\Route;
+use Symfony\Component\Security\Http\Attribute\IsGranted;
+
+/**
+ * Streams the justification file of an absence request. Owner or admin only.
+ */
+class AbsenceJustificationDownloadController extends AbstractController
+{
+    public function __construct(
+        private readonly EntityManagerInterface $entityManager,
+        private readonly Security $security,
+        private readonly string $uploadDir,
+    ) {}
+
+    #[Route('/api/absence_requests/{id}/justificatif', name: 'absence_justification_download', methods: ['GET'], priority: 1)]
+    #[IsGranted('ROLE_USER')]
+    public function __invoke(int $id): BinaryFileResponse
+    {
+        $absence = $this->entityManager->getRepository(AbsenceRequest::class)->find($id);
+        if (null === $absence) {
+            throw new NotFoundHttpException('Absence request not found.');
+        }
+
+        if (!$this->security->isGranted('ROLE_ADMIN') && $absence->getUser() !== $this->security->getUser()) {
+            throw new AccessDeniedHttpException('You do not have access to this file.');
+        }
+
+        $fileName = $absence->getJustificationFileName();
+        if (null === $fileName) {
+            throw new NotFoundHttpException('No justification file for this request.');
+        }
+
+        $filePath = $this->uploadDir.'/'.$fileName;
+        if (!file_exists($filePath)) {
+            throw new NotFoundHttpException('File not found on disk.');
+        }
+
+        $response = new BinaryFileResponse($filePath);
+        $mimeType = mime_content_type($filePath) ?: 'application/octet-stream';
+
+        $disposition = (str_starts_with($mimeType, 'image/') || 'application/pdf' === $mimeType)
+            ? ResponseHeaderBag::DISPOSITION_INLINE
+            : ResponseHeaderBag::DISPOSITION_ATTACHMENT;
+
+        $response->setContentDisposition($disposition, $fileName);
+        $response->headers->set('Content-Type', $mimeType);
+
+        return $response;
+    }
+}
diff --git a/src/Controller/Absence/AbsenceJustificationUploadController.php b/src/Controller/Absence/AbsenceJustificationUploadController.php
new file mode 100644
index 0000000..5cfaa20
--- /dev/null
+++ b/src/Controller/Absence/AbsenceJustificationUploadController.php
@@ -0,0 +1,86 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Controller\Absence;
+
+use App\Entity\AbsenceRequest;
+use Doctrine\ORM\EntityManagerInterface;
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Bundle\SecurityBundle\Security;
+use Symfony\Component\HttpFoundation\JsonResponse;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException;
+use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;
+use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
+use Symfony\Component\Routing\Attribute\Route;
+use Symfony\Component\Security\Http\Attribute\IsGranted;
+use Symfony\Component\Uid\Uuid;
+
+/**
+ * Uploads a justification file (PDF / image) for an absence request. The owner
+ * or an admin may upload; the server-detected MIME type is validated.
+ */
+class AbsenceJustificationUploadController extends AbstractController
+{
+    private const MAX_FILE_SIZE = 10 * 1024 * 1024; // 10 MB
+
+    private const MIME_TO_EXTENSION = [
+        'image/jpeg'      => 'jpg',
+        'image/png'       => 'png',
+        'image/webp'      => 'webp',
+        'application/pdf' => 'pdf',
+    ];
+
+    public function __construct(
+        private readonly EntityManagerInterface $entityManager,
+        private readonly Security $security,
+        private readonly string $uploadDir,
+    ) {}
+
+    #[Route('/api/absence_requests/{id}/justificatif', name: 'absence_justification_upload', methods: ['POST'], priority: 1)]
+    #[IsGranted('ROLE_USER')]
+    public function __invoke(int $id, Request $request): JsonResponse
+    {
+        $absence = $this->entityManager->getRepository(AbsenceRequest::class)->find($id);
+        if (null === $absence) {
+            throw new NotFoundHttpException('Absence request not found.');
+        }
+
+        if (!$this->security->isGranted('ROLE_ADMIN') && $absence->getUser() !== $this->security->getUser()) {
+            throw new AccessDeniedHttpException('You can only attach a file to your own request.');
+        }
+
+        $file = $request->files->get('file');
+        if (null === $file || !$file->isValid()) {
+            throw new BadRequestHttpException('No valid file uploaded.');
+        }
+        if ($file->getSize() > self::MAX_FILE_SIZE) {
+            throw new BadRequestHttpException('File size exceeds 10 MB limit.');
+        }
+
+        $mimeType = $file->getMimeType() ?: 'application/octet-stream';
+        if (!isset(self::MIME_TO_EXTENSION[$mimeType])) {
+            throw new BadRequestHttpException(sprintf('File type "%s" is not allowed (PDF or image only).', $mimeType));
+        }
+
+        $fileName = Uuid::v4()->toRfc4122().'.'.self::MIME_TO_EXTENSION[$mimeType];
+
+        if (!is_dir($this->uploadDir)) {
+            mkdir($this->uploadDir, 0o775, true);
+        }
+
+        // Remove a previously uploaded file if any
+        $previous = $absence->getJustificationFileName();
+        if (null !== $previous && file_exists($this->uploadDir.'/'.$previous)) {
+            unlink($this->uploadDir.'/'.$previous);
+        }
+
+        $file->move($this->uploadDir, $fileName);
+
+        $absence->setJustificationFileName($fileName);
+        $this->entityManager->flush();
+
+        return $this->json($absence, context: ['groups' => ['absence_request:read']]);
+    }
+}
diff --git a/src/Controller/Absence/AbsencePreviewController.php b/src/Controller/Absence/AbsencePreviewController.php
new file mode 100644
index 0000000..c313cc2
--- /dev/null
+++ b/src/Controller/Absence/AbsencePreviewController.php
@@ -0,0 +1,95 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Controller\Absence;
+
+use App\Entity\User;
+use App\Enum\AbsenceType;
+use App\Enum\HalfDay;
+use App\Repository\AbsenceBalanceRepository;
+use App\Repository\AbsencePolicyRepository;
+use App\Service\AbsenceBalanceService;
+use App\Service\AbsenceDayCalculator;
+use DateTimeImmutable;
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Bundle\SecurityBundle\Security;
+use Symfony\Component\HttpFoundation\JsonResponse;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpKernel\Exception\UnprocessableEntityHttpException;
+use Symfony\Component\Routing\Attribute\Route;
+use Symfony\Component\Security\Http\Attribute\IsGranted;
+
+/**
+ * Dry-run endpoint for the "new request" form: returns the number of deducted
+ * days and the projected balance without creating anything. Required because
+ * public holidays are computed server-side.
+ */
+class AbsencePreviewController extends AbstractController
+{
+    public function __construct(
+        private readonly Security $security,
+        private readonly AbsenceDayCalculator $calculator,
+        private readonly AbsencePolicyRepository $policyRepository,
+        private readonly AbsenceBalanceRepository $balanceRepository,
+        private readonly AbsenceBalanceService $balanceService,
+    ) {}
+
+    #[Route('/api/absence_requests/preview', name: 'absence_request_preview', methods: ['POST'], priority: 1)]
+    #[IsGranted('ROLE_USER')]
+    public function __invoke(Request $request): JsonResponse
+    {
+        /** @var array<string, mixed> $payload */
+        $payload = json_decode($request->getContent(), true) ?? [];
+
+        $type = AbsenceType::tryFrom((string) ($payload['type'] ?? ''));
+        if (null === $type) {
+            throw new UnprocessableEntityHttpException('Unknown absence type.');
+        }
+
+        $startRaw = (string) ($payload['startDate'] ?? '');
+        $endRaw   = (string) ($payload['endDate'] ?? '');
+        if ('' === $startRaw || '' === $endRaw) {
+            throw new UnprocessableEntityHttpException('Start date and end date are required.');
+        }
+
+        $start = new DateTimeImmutable($startRaw);
+        $end   = new DateTimeImmutable($endRaw);
+        if ($end < $start) {
+            throw new UnprocessableEntityHttpException('End date must be on or after start date.');
+        }
+
+        $policy          = $this->policyRepository->findOneByType($type);
+        $workingDaysOnly = $policy?->isCountWorkingDaysOnly() ?? true;
+
+        $countedDays = $this->calculator->countWorkingDays(
+            $start,
+            $end,
+            isset($payload['startHalfDay']) ? HalfDay::tryFrom((string) $payload['startHalfDay']) : null,
+            isset($payload['endHalfDay']) ? HalfDay::tryFrom((string) $payload['endHalfDay']) : null,
+            $workingDaysOnly,
+        );
+
+        $user = $this->security->getUser();
+        assert($user instanceof User);
+
+        $available          = null;
+        $projectedAvailable = null;
+        $period             = null;
+
+        if ($type->decrementsBalance()) {
+            $period             = $this->balanceService->periodFor($user, $type, $start);
+            $balance            = $this->balanceRepository->findOneForPeriod($user, $type, $period);
+            $available          = $balance?->getAvailable() ?? 0.0;
+            $projectedAvailable = $available - $countedDays;
+        }
+
+        return $this->json([
+            'countedDays'           => $countedDays,
+            'period'                => $period,
+            'available'             => $available,
+            'projectedAvailable'    => $projectedAvailable,
+            'justificationRequired' => $policy?->isJustificationRequired() ?? false,
+        ]);
+    }
+}
diff --git a/src/DataFixtures/AppFixtures.php b/src/DataFixtures/AppFixtures.php
index a6a1c03..90efbe8 100644
--- a/src/DataFixtures/AppFixtures.php
+++ b/src/DataFixtures/AppFixtures.php
@@ -4,6 +4,9 @@ declare(strict_types=1);
 
 namespace App\DataFixtures;
 
+use App\Entity\AbsenceBalance;
+use App\Entity\AbsencePolicy;
+use App\Entity\AbsenceRequest;
 use App\Entity\Client;
 use App\Entity\ClientTicket;
 use App\Entity\MailConfiguration;
@@ -19,6 +22,10 @@ use App\Entity\TimeEntry;
 use App\Entity\User;
 use App\Entity\Workflow;
 use App\Entity\ZimbraConfiguration;
+use App\Enum\AbsenceStatus;
+use App\Enum\AbsenceType;
+use App\Enum\ContractType;
+use App\Enum\FamilySituation;
 use App\Enum\RecurrenceType;
 use App\Enum\StatusCategory;
 use DateTimeImmutable;
@@ -722,6 +729,106 @@ class AppFixtures extends Fixture
         $mailConfig->setEnabled(false);
         $manager->persist($mailConfig);
 
+        // =============================================
+        // Absence management — policies, employees, balances, requests
+        // =============================================
+
+        // Default policies for the 5 absence types (legal defaults, editable by admin)
+        $policyData = [
+            // [type, daysPerYear, daysPerEvent, justifRequired, noticeDays, workingDaysOnly]
+            [AbsenceType::PaidLeave, 25.0, null, false, 30, true],
+            [AbsenceType::MarriagePacs, null, 4.0, true, 0, true],
+            [AbsenceType::ParentalLeave, null, null, true, 30, true],
+            [AbsenceType::Bereavement, null, 3.0, true, 0, true],
+            [AbsenceType::SickLeave, null, null, true, 0, true],
+        ];
+
+        foreach ($policyData as [$type, $daysPerYear, $daysPerEvent, $justif, $notice, $workingDaysOnly]) {
+            $policy = new AbsencePolicy();
+            $policy->setType($type);
+            $policy->setDaysPerYear($daysPerYear);
+            $policy->setDaysPerEvent($daysPerEvent);
+            $policy->setJustificationRequired($justif);
+            $policy->setNoticeDays($notice);
+            $policy->setCountWorkingDaysOnly($workingDaysOnly);
+            $policy->setActive(true);
+            $manager->persist($policy);
+        }
+
+        // Mark internal users as employees
+        $admin->setIsEmployee(true);
+        $admin->setHireDate(new DateTimeImmutable('2020-01-15'));
+        $admin->setContractType(ContractType::Cdi);
+        $admin->setFamilySituation(FamilySituation::Married);
+        $admin->setNbChildren(2);
+
+        $userAlice->setIsEmployee(true);
+        $userAlice->setHireDate(new DateTimeImmutable('2022-09-01'));
+        $userAlice->setContractType(ContractType::Cdi);
+        $userAlice->setFamilySituation(FamilySituation::Single);
+
+        $userBob->setIsEmployee(true);
+        $userBob->setHireDate(new DateTimeImmutable('2023-03-10'));
+        $userBob->setContractType(ContractType::Cdd);
+        $userBob->setWorkTimeRatio(0.8);
+        $userBob->setFamilySituation(FamilySituation::Pacsed);
+        $userBob->setNbChildren(1);
+
+        // Paid-leave balances for the current reference period (June 1st → May 31st)
+        $cpPeriod    = '2025-2026';
+        $balanceData = [
+            // [user, acquired, taken, pending]
+            [$admin, 22.5, 5.0, 0.0],
+            [$userAlice, 18.0, 2.0, 5.0],
+            [$userBob, 14.0, 0.0, 0.0],
+        ];
+
+        foreach ($balanceData as [$bUser, $acquired, $taken, $pending]) {
+            $balance = new AbsenceBalance();
+            $balance->setUser($bUser);
+            $balance->setType(AbsenceType::PaidLeave);
+            $balance->setPeriod($cpPeriod);
+            $balance->setAcquired($acquired);
+            $balance->setTaken($taken);
+            $balance->setPending($pending);
+            $manager->persist($balance);
+        }
+
+        // Demo requests
+        $approvedCp = new AbsenceRequest();
+        $approvedCp->setUser($admin);
+        $approvedCp->setType(AbsenceType::PaidLeave);
+        $approvedCp->setStartDate(new DateTimeImmutable('2026-04-13'));
+        $approvedCp->setEndDate(new DateTimeImmutable('2026-04-17'));
+        $approvedCp->setCountedDays(5.0);
+        $approvedCp->setReason('Vacances de printemps');
+        $approvedCp->setStatus(AbsenceStatus::Approved);
+        $approvedCp->setCreatedAt(new DateTimeImmutable('2026-03-10'));
+        $approvedCp->setReviewedAt(new DateTimeImmutable('2026-03-11'));
+        $approvedCp->setReviewedBy($admin);
+        $manager->persist($approvedCp);
+
+        $pendingCp = new AbsenceRequest();
+        $pendingCp->setUser($userAlice);
+        $pendingCp->setType(AbsenceType::PaidLeave);
+        $pendingCp->setStartDate(new DateTimeImmutable('2026-06-15'));
+        $pendingCp->setEndDate(new DateTimeImmutable('2026-06-19'));
+        $pendingCp->setCountedDays(5.0);
+        $pendingCp->setStatus(AbsenceStatus::Pending);
+        $pendingCp->setCreatedAt(new DateTimeImmutable('-2 days'));
+        $manager->persist($pendingCp);
+
+        $pendingMarriage = new AbsenceRequest();
+        $pendingMarriage->setUser($userBob);
+        $pendingMarriage->setType(AbsenceType::MarriagePacs);
+        $pendingMarriage->setStartDate(new DateTimeImmutable('2026-07-06'));
+        $pendingMarriage->setEndDate(new DateTimeImmutable('2026-07-09'));
+        $pendingMarriage->setCountedDays(4.0);
+        $pendingMarriage->setReason('Mariage');
+        $pendingMarriage->setStatus(AbsenceStatus::Pending);
+        $pendingMarriage->setCreatedAt(new DateTimeImmutable('-1 day'));
+        $manager->persist($pendingMarriage);
+
         $manager->flush();
     }
 }
diff --git a/src/Entity/AbsenceBalance.php b/src/Entity/AbsenceBalance.php
new file mode 100644
index 0000000..32977a6
--- /dev/null
+++ b/src/Entity/AbsenceBalance.php
@@ -0,0 +1,163 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Entity;
+
+use ApiPlatform\Metadata\ApiResource;
+use ApiPlatform\Metadata\Get;
+use ApiPlatform\Metadata\GetCollection;
+use ApiPlatform\Metadata\Patch;
+use App\Enum\AbsenceType;
+use App\Repository\AbsenceBalanceRepository;
+use App\State\AbsenceBalanceProvider;
+use Doctrine\DBAL\Types\Types;
+use Doctrine\ORM\Mapping as ORM;
+use Symfony\Component\Serializer\Attribute\Groups;
+
+/**
+ * Per-employee, per-type leave balance for a given reference period.
+ */
+#[ApiResource(
+    operations: [
+        new GetCollection(
+            paginationEnabled: false,
+            security: "is_granted('ROLE_USER')",
+            provider: AbsenceBalanceProvider::class,
+        ),
+        new Get(
+            security: "is_granted('ROLE_USER')",
+            provider: AbsenceBalanceProvider::class,
+        ),
+        new Patch(security: "is_granted('ROLE_ADMIN')"),
+    ],
+    normalizationContext: ['groups' => ['absence_balance:read']],
+    denormalizationContext: ['groups' => ['absence_balance:write']],
+)]
+#[ORM\Entity(repositoryClass: AbsenceBalanceRepository::class)]
+#[ORM\Table(name: 'absence_balance')]
+#[ORM\UniqueConstraint(name: 'uniq_absence_balance_user_type_period', columns: ['user_id', 'type', 'period'])]
+class AbsenceBalance
+{
+    #[ORM\Id]
+    #[ORM\GeneratedValue]
+    #[ORM\Column]
+    #[Groups(['absence_balance:read'])]
+    private ?int $id = null;
+
+    #[ORM\ManyToOne(targetEntity: User::class)]
+    #[ORM\JoinColumn(nullable: false, onDelete: 'CASCADE')]
+    #[Groups(['absence_balance:read'])]
+    private ?User $user = null;
+
+    #[ORM\Column(type: Types::STRING, length: 32, enumType: AbsenceType::class)]
+    #[Groups(['absence_balance:read'])]
+    private AbsenceType $type;
+
+    /** Reference period, e.g. "2025-2026" for paid leave or "2025" for yearly. */
+    #[ORM\Column(length: 16)]
+    #[Groups(['absence_balance:read'])]
+    private ?string $period = null;
+
+    #[ORM\Column(type: Types::FLOAT)]
+    #[Groups(['absence_balance:read', 'absence_balance:write'])]
+    private float $acquired = 0.0;
+
+    #[ORM\Column(type: Types::FLOAT)]
+    #[Groups(['absence_balance:read', 'absence_balance:write'])]
+    private float $taken = 0.0;
+
+    /** Sum of days in PENDING requests, for information. */
+    #[ORM\Column(type: Types::FLOAT)]
+    #[Groups(['absence_balance:read'])]
+    private float $pending = 0.0;
+
+    #[Groups(['absence_balance:read'])]
+    public function getAvailable(): float
+    {
+        return $this->acquired - $this->taken;
+    }
+
+    #[Groups(['absence_balance:read'])]
+    public function getLabel(): string
+    {
+        return $this->type->label();
+    }
+
+    public function getId(): ?int
+    {
+        return $this->id;
+    }
+
+    public function getUser(): ?User
+    {
+        return $this->user;
+    }
+
+    public function setUser(?User $user): static
+    {
+        $this->user = $user;
+
+        return $this;
+    }
+
+    public function getType(): AbsenceType
+    {
+        return $this->type;
+    }
+
+    public function setType(AbsenceType $type): static
+    {
+        $this->type = $type;
+
+        return $this;
+    }
+
+    public function getPeriod(): ?string
+    {
+        return $this->period;
+    }
+
+    public function setPeriod(string $period): static
+    {
+        $this->period = $period;
+
+        return $this;
+    }
+
+    public function getAcquired(): float
+    {
+        return $this->acquired;
+    }
+
+    public function setAcquired(float $acquired): static
+    {
+        $this->acquired = $acquired;
+
+        return $this;
+    }
+
+    public function getTaken(): float
+    {
+        return $this->taken;
+    }
+
+    public function setTaken(float $taken): static
+    {
+        $this->taken = $taken;
+
+        return $this;
+    }
+
+    public function getPending(): float
+    {
+        return $this->pending;
+    }
+
+    public function setPending(float $pending): static
+    {
+        $this->pending = $pending;
+
+        return $this;
+    }
+}
diff --git a/src/Entity/AbsencePolicy.php b/src/Entity/AbsencePolicy.php
new file mode 100644
index 0000000..00abb17
--- /dev/null
+++ b/src/Entity/AbsencePolicy.php
@@ -0,0 +1,171 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Entity;
+
+use ApiPlatform\Metadata\ApiResource;
+use ApiPlatform\Metadata\Get;
+use ApiPlatform\Metadata\GetCollection;
+use ApiPlatform\Metadata\Patch;
+use App\Enum\AbsenceType;
+use App\Repository\AbsencePolicyRepository;
+use Doctrine\DBAL\Types\Types;
+use Doctrine\ORM\Mapping as ORM;
+use Symfony\Component\Serializer\Attribute\Groups;
+
+/**
+ * Per-type configuration of absence rules. Overrides the legal defaults and
+ * lets an admin tune days/year, days/event, notice period, etc.
+ */
+#[ApiResource(
+    operations: [
+        new GetCollection(
+            paginationEnabled: false,
+            security: "is_granted('ROLE_USER')",
+        ),
+        new Get(security: "is_granted('ROLE_USER')"),
+        new Patch(security: "is_granted('ROLE_ADMIN')"),
+    ],
+    normalizationContext: ['groups' => ['absence_policy:read']],
+    denormalizationContext: ['groups' => ['absence_policy:write']],
+    order: ['type' => 'ASC'],
+)]
+#[ORM\Entity(repositoryClass: AbsencePolicyRepository::class)]
+#[ORM\Table(name: 'absence_policy')]
+#[ORM\UniqueConstraint(name: 'uniq_absence_policy_type', columns: ['type'])]
+class AbsencePolicy
+{
+    #[ORM\Id]
+    #[ORM\GeneratedValue]
+    #[ORM\Column]
+    #[Groups(['absence_policy:read'])]
+    private ?int $id = null;
+
+    #[ORM\Column(type: Types::STRING, length: 32, enumType: AbsenceType::class)]
+    #[Groups(['absence_policy:read', 'absence_balance:read', 'absence_request:read'])]
+    private AbsenceType $type;
+
+    /** Yearly entitlement (e.g. 25 for paid leave); null when not relevant. */
+    #[ORM\Column(type: Types::FLOAT, nullable: true)]
+    #[Groups(['absence_policy:read', 'absence_policy:write'])]
+    private ?float $daysPerYear = null;
+
+    /** Days granted per event (e.g. 4 for marriage); null when not relevant. */
+    #[ORM\Column(type: Types::FLOAT, nullable: true)]
+    #[Groups(['absence_policy:read', 'absence_policy:write'])]
+    private ?float $daysPerEvent = null;
+
+    #[ORM\Column]
+    #[Groups(['absence_policy:read', 'absence_policy:write'])]
+    private bool $justificationRequired = false;
+
+    /** Minimum notice period in days (e.g. 30 for paid leave, 0 for sick leave). */
+    #[ORM\Column]
+    #[Groups(['absence_policy:read', 'absence_policy:write'])]
+    private int $noticeDays = 0;
+
+    /** true => "jours ouvrés" (Mon-Fri), false => "jours ouvrables" (Mon-Sat). */
+    #[ORM\Column]
+    #[Groups(['absence_policy:read', 'absence_policy:write'])]
+    private bool $countWorkingDaysOnly = true;
+
+    #[ORM\Column]
+    #[Groups(['absence_policy:read', 'absence_policy:write'])]
+    private bool $active = true;
+
+    #[Groups(['absence_policy:read'])]
+    public function getLabel(): string
+    {
+        return $this->type->label();
+    }
+
+    public function getId(): ?int
+    {
+        return $this->id;
+    }
+
+    public function getType(): AbsenceType
+    {
+        return $this->type;
+    }
+
+    public function setType(AbsenceType $type): static
+    {
+        $this->type = $type;
+
+        return $this;
+    }
+
+    public function getDaysPerYear(): ?float
+    {
+        return $this->daysPerYear;
+    }
+
+    public function setDaysPerYear(?float $daysPerYear): static
+    {
+        $this->daysPerYear = $daysPerYear;
+
+        return $this;
+    }
+
+    public function getDaysPerEvent(): ?float
+    {
+        return $this->daysPerEvent;
+    }
+
+    public function setDaysPerEvent(?float $daysPerEvent): static
+    {
+        $this->daysPerEvent = $daysPerEvent;
+
+        return $this;
+    }
+
+    public function isJustificationRequired(): bool
+    {
+        return $this->justificationRequired;
+    }
+
+    public function setJustificationRequired(bool $justificationRequired): static
+    {
+        $this->justificationRequired = $justificationRequired;
+
+        return $this;
+    }
+
+    public function getNoticeDays(): int
+    {
+        return $this->noticeDays;
+    }
+
+    public function setNoticeDays(int $noticeDays): static
+    {
+        $this->noticeDays = $noticeDays;
+
+        return $this;
+    }
+
+    public function isCountWorkingDaysOnly(): bool
+    {
+        return $this->countWorkingDaysOnly;
+    }
+
+    public function setCountWorkingDaysOnly(bool $countWorkingDaysOnly): static
+    {
+        $this->countWorkingDaysOnly = $countWorkingDaysOnly;
+
+        return $this;
+    }
+
+    public function isActive(): bool
+    {
+        return $this->active;
+    }
+
+    public function setActive(bool $active): static
+    {
+        $this->active = $active;
+
+        return $this;
+    }
+}
diff --git a/src/Entity/AbsenceRequest.php b/src/Entity/AbsenceRequest.php
new file mode 100644
index 0000000..5045bdf
--- /dev/null
+++ b/src/Entity/AbsenceRequest.php
@@ -0,0 +1,326 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Entity;
+
+use ApiPlatform\Metadata\ApiResource;
+use ApiPlatform\Metadata\Delete;
+use ApiPlatform\Metadata\Get;
+use ApiPlatform\Metadata\GetCollection;
+use ApiPlatform\Metadata\Patch;
+use ApiPlatform\Metadata\Post;
+use App\Enum\AbsenceStatus;
+use App\Enum\AbsenceType;
+use App\Enum\HalfDay;
+use App\Repository\AbsenceRequestRepository;
+use App\State\AbsenceCancelProcessor;
+use App\State\AbsenceRequestProcessor;
+use App\State\AbsenceRequestProvider;
+use App\State\AbsenceReviewProcessor;
+use DateTimeImmutable;
+use Doctrine\DBAL\Types\Types;
+use Doctrine\ORM\Mapping as ORM;
+use Symfony\Component\Serializer\Attribute\Groups;
+use Symfony\Component\Validator\Constraints as Assert;
+
+#[ApiResource(
+    operations: [
+        new GetCollection(
+            paginationEnabled: false,
+            security: "is_granted('ROLE_USER')",
+            provider: AbsenceRequestProvider::class,
+        ),
+        new Get(
+            security: "is_granted('ROLE_USER')",
+            provider: AbsenceRequestProvider::class,
+        ),
+        new Post(
+            security: "is_granted('ROLE_USER')",
+            processor: AbsenceRequestProcessor::class,
+        ),
+        new Patch(
+            uriTemplate: '/absence_requests/{id}/approve',
+            security: "is_granted('ROLE_ADMIN')",
+            processor: AbsenceReviewProcessor::class,
+            provider: AbsenceRequestProvider::class,
+        ),
+        new Patch(
+            uriTemplate: '/absence_requests/{id}/reject',
+            security: "is_granted('ROLE_ADMIN')",
+            processor: AbsenceReviewProcessor::class,
+            provider: AbsenceRequestProvider::class,
+        ),
+        new Patch(
+            uriTemplate: '/absence_requests/{id}/cancel',
+            security: "is_granted('ROLE_USER')",
+            processor: AbsenceCancelProcessor::class,
+            provider: AbsenceRequestProvider::class,
+        ),
+        new Delete(security: "is_granted('ROLE_ADMIN')"),
+    ],
+    normalizationContext: ['groups' => ['absence_request:read']],
+    denormalizationContext: ['groups' => ['absence_request:write']],
+    order: ['createdAt' => 'DESC'],
+)]
+#[ORM\Entity(repositoryClass: AbsenceRequestRepository::class)]
+#[ORM\Table(name: 'absence_request')]
+class AbsenceRequest
+{
+    #[ORM\Id]
+    #[ORM\GeneratedValue]
+    #[ORM\Column]
+    #[Groups(['absence_request:read'])]
+    private ?int $id = null;
+
+    #[ORM\ManyToOne(targetEntity: User::class)]
+    #[ORM\JoinColumn(nullable: false, onDelete: 'CASCADE')]
+    #[Groups(['absence_request:read'])]
+    private ?User $user = null;
+
+    #[ORM\Column(type: Types::STRING, length: 32, enumType: AbsenceType::class)]
+    #[Groups(['absence_request:read', 'absence_request:write'])]
+    #[Assert\NotNull]
+    private ?AbsenceType $type = null;
+
+    #[ORM\Column(type: Types::DATE_IMMUTABLE)]
+    #[Groups(['absence_request:read', 'absence_request:write'])]
+    #[Assert\NotNull]
+    private ?DateTimeImmutable $startDate = null;
+
+    #[ORM\Column(type: Types::DATE_IMMUTABLE)]
+    #[Groups(['absence_request:read', 'absence_request:write'])]
+    #[Assert\NotNull]
+    private ?DateTimeImmutable $endDate = null;
+
+    #[ORM\Column(type: Types::STRING, length: 16, nullable: true, enumType: HalfDay::class)]
+    #[Groups(['absence_request:read', 'absence_request:write'])]
+    private ?HalfDay $startHalfDay = null;
+
+    #[ORM\Column(type: Types::STRING, length: 16, nullable: true, enumType: HalfDay::class)]
+    #[Groups(['absence_request:read', 'absence_request:write'])]
+    private ?HalfDay $endHalfDay = null;
+
+    /** Number of deducted days, computed server-side at creation. */
+    #[ORM\Column(type: Types::FLOAT)]
+    #[Groups(['absence_request:read'])]
+    private float $countedDays = 0.0;
+
+    #[ORM\Column(type: Types::TEXT, nullable: true)]
+    #[Groups(['absence_request:read', 'absence_request:write'])]
+    private ?string $reason = null;
+
+    #[ORM\Column(length: 255, nullable: true)]
+    #[Groups(['absence_request:read'])]
+    private ?string $justificationFileName = null;
+
+    #[ORM\Column(type: Types::STRING, length: 16, enumType: AbsenceStatus::class)]
+    #[Groups(['absence_request:read'])]
+    private AbsenceStatus $status = AbsenceStatus::Pending;
+
+    #[ORM\Column(type: Types::TEXT, nullable: true)]
+    #[Groups(['absence_request:read', 'absence_request:write'])]
+    private ?string $rejectionReason = null;
+
+    #[ORM\Column(type: Types::DATETIME_IMMUTABLE)]
+    #[Groups(['absence_request:read'])]
+    private ?DateTimeImmutable $createdAt = null;
+
+    #[ORM\Column(type: Types::DATETIME_IMMUTABLE, nullable: true)]
+    #[Groups(['absence_request:read'])]
+    private ?DateTimeImmutable $reviewedAt = null;
+
+    #[ORM\ManyToOne(targetEntity: User::class)]
+    #[ORM\JoinColumn(nullable: true, onDelete: 'SET NULL')]
+    #[Groups(['absence_request:read'])]
+    private ?User $reviewedBy = null;
+
+    #[Groups(['absence_request:read'])]
+    public function getLabel(): ?string
+    {
+        return $this->type?->label();
+    }
+
+    #[Groups(['absence_request:read'])]
+    public function getJustificationUrl(): ?string
+    {
+        if (null === $this->justificationFileName) {
+            return null;
+        }
+
+        return '/api/absence_requests/'.$this->id.'/justificatif';
+    }
+
+    public function getId(): ?int
+    {
+        return $this->id;
+    }
+
+    public function getUser(): ?User
+    {
+        return $this->user;
+    }
+
+    public function setUser(?User $user): static
+    {
+        $this->user = $user;
+
+        return $this;
+    }
+
+    public function getType(): ?AbsenceType
+    {
+        return $this->type;
+    }
+
+    public function setType(?AbsenceType $type): static
+    {
+        $this->type = $type;
+
+        return $this;
+    }
+
+    public function getStartDate(): ?DateTimeImmutable
+    {
+        return $this->startDate;
+    }
+
+    public function setStartDate(?DateTimeImmutable $startDate): static
+    {
+        $this->startDate = $startDate;
+
+        return $this;
+    }
+
+    public function getEndDate(): ?DateTimeImmutable
+    {
+        return $this->endDate;
+    }
+
+    public function setEndDate(?DateTimeImmutable $endDate): static
+    {
+        $this->endDate = $endDate;
+
+        return $this;
+    }
+
+    public function getStartHalfDay(): ?HalfDay
+    {
+        return $this->startHalfDay;
+    }
+
+    public function setStartHalfDay(?HalfDay $startHalfDay): static
+    {
+        $this->startHalfDay = $startHalfDay;
+
+        return $this;
+    }
+
+    public function getEndHalfDay(): ?HalfDay
+    {
+        return $this->endHalfDay;
+    }
+
+    public function setEndHalfDay(?HalfDay $endHalfDay): static
+    {
+        $this->endHalfDay = $endHalfDay;
+
+        return $this;
+    }
+
+    public function getCountedDays(): float
+    {
+        return $this->countedDays;
+    }
+
+    public function setCountedDays(float $countedDays): static
+    {
+        $this->countedDays = $countedDays;
+
+        return $this;
+    }
+
+    public function getReason(): ?string
+    {
+        return $this->reason;
+    }
+
+    public function setReason(?string $reason): static
+    {
+        $this->reason = $reason;
+
+        return $this;
+    }
+
+    public function getJustificationFileName(): ?string
+    {
+        return $this->justificationFileName;
+    }
+
+    public function setJustificationFileName(?string $justificationFileName): static
+    {
+        $this->justificationFileName = $justificationFileName;
+
+        return $this;
+    }
+
+    public function getStatus(): AbsenceStatus
+    {
+        return $this->status;
+    }
+
+    public function setStatus(AbsenceStatus $status): static
+    {
+        $this->status = $status;
+
+        return $this;
+    }
+
+    public function getRejectionReason(): ?string
+    {
+        return $this->rejectionReason;
+    }
+
+    public function setRejectionReason(?string $rejectionReason): static
+    {
+        $this->rejectionReason = $rejectionReason;
+
+        return $this;
+    }
+
+    public function getCreatedAt(): ?DateTimeImmutable
+    {
+        return $this->createdAt;
+    }
+
+    public function setCreatedAt(DateTimeImmutable $createdAt): static
+    {
+        $this->createdAt = $createdAt;
+
+        return $this;
+    }
+
+    public function getReviewedAt(): ?DateTimeImmutable
+    {
+        return $this->reviewedAt;
+    }
+
+    public function setReviewedAt(?DateTimeImmutable $reviewedAt): static
+    {
+        $this->reviewedAt = $reviewedAt;
+
+        return $this;
+    }
+
+    public function getReviewedBy(): ?User
+    {
+        return $this->reviewedBy;
+    }
+
+    public function setReviewedBy(?User $reviewedBy): static
+    {
+        $this->reviewedBy = $reviewedBy;
+
+        return $this;
+    }
+}
diff --git a/src/Entity/User.php b/src/Entity/User.php
index 11067e0..e796ae4 100644
--- a/src/Entity/User.php
+++ b/src/Entity/User.php
@@ -10,6 +10,8 @@ use ApiPlatform\Metadata\Get;
 use ApiPlatform\Metadata\GetCollection;
 use ApiPlatform\Metadata\Patch;
 use ApiPlatform\Metadata\Post;
+use App\Enum\ContractType;
+use App\Enum\FamilySituation;
 use App\Repository\UserRepository;
 use App\State\MeProvider;
 use App\State\UserPasswordHasherProcessor;
@@ -48,11 +50,11 @@ class User implements UserInterface, PasswordAuthenticatedUserInterface
     #[ORM\Id]
     #[ORM\GeneratedValue]
     #[ORM\Column]
-    #[Groups(['me:read', 'task:read', 'user:list', 'time_entry:read', 'client_ticket:read'])]
+    #[Groups(['me:read', 'task:read', 'user:list', 'time_entry:read', 'client_ticket:read', 'absence_request:read', 'absence_balance:read'])]
     private ?int $id = null;
 
     #[ORM\Column(length: 180, unique: true)]
-    #[Groups(['me:read', 'task:read', 'user:list', 'user:write', 'time_entry:read', 'client_ticket:read'])]
+    #[Groups(['me:read', 'task:read', 'user:list', 'user:write', 'time_entry:read', 'client_ticket:read', 'absence_request:read', 'absence_balance:read'])]
     private ?string $username = null;
 
     /** @var list<string> */
@@ -87,6 +89,54 @@ class User implements UserInterface, PasswordAuthenticatedUserInterface
     #[Groups(['me:read', 'user:list', 'user:write'])]
     private Collection $allowedProjects;
 
+    // --- HR / absence management fields ---
+
+    /** Whether this user is an employee subject to absence management. */
+    #[ORM\Column]
+    #[Groups(['me:read', 'user:list', 'user:write'])]
+    private bool $isEmployee = false;
+
+    /** Hiring date — start of paid-leave acquisition. */
+    #[ORM\Column(type: Types::DATE_IMMUTABLE, nullable: true)]
+    #[Groups(['me:read', 'user:list', 'user:write'])]
+    private ?DateTimeImmutable $hireDate = null;
+
+    #[ORM\Column(type: Types::DATE_IMMUTABLE, nullable: true)]
+    #[Groups(['me:read', 'user:list', 'user:write'])]
+    private ?DateTimeImmutable $endDate = null;
+
+    #[ORM\Column(type: Types::STRING, length: 16, nullable: true, enumType: ContractType::class)]
+    #[Groups(['me:read', 'user:list', 'user:write'])]
+    private ?ContractType $contractType = null;
+
+    /** Work-time ratio: 1.0 = full time, 0.8 = 4 days out of 5. */
+    #[ORM\Column(type: Types::FLOAT)]
+    #[Groups(['me:read', 'user:list', 'user:write'])]
+    private float $workTimeRatio = 1.0;
+
+    /** Yearly paid-leave entitlement in worked days (default 25 = jours ouvrés). */
+    #[ORM\Column(type: Types::FLOAT)]
+    #[Groups(['me:read', 'user:list', 'user:write'])]
+    private float $annualLeaveDays = 25.0;
+
+    /** Reference period start as MM-DD (default 06-01, 1st of June). */
+    #[ORM\Column(length: 5)]
+    #[Groups(['me:read', 'user:list', 'user:write'])]
+    private string $referencePeriodStart = '06-01';
+
+    /** Paid-leave already acquired when the module is rolled out. */
+    #[ORM\Column(type: Types::FLOAT)]
+    #[Groups(['me:read', 'user:list', 'user:write'])]
+    private float $initialLeaveBalance = 0.0;
+
+    #[ORM\Column(type: Types::STRING, length: 16, nullable: true, enumType: FamilySituation::class)]
+    #[Groups(['me:read', 'user:list', 'user:write'])]
+    private ?FamilySituation $familySituation = null;
+
+    #[ORM\Column]
+    #[Groups(['me:read', 'user:list', 'user:write'])]
+    private int $nbChildren = 0;
+
     public function __construct()
     {
         $this->createdAt       = new DateTimeImmutable();
@@ -217,7 +267,7 @@ class User implements UserInterface, PasswordAuthenticatedUserInterface
         return $this;
     }
 
-    #[Groups(['me:read', 'task:read', 'user:list', 'time_entry:read', 'client_ticket:read'])]
+    #[Groups(['me:read', 'task:read', 'user:list', 'time_entry:read', 'client_ticket:read', 'absence_request:read', 'absence_balance:read'])]
     public function getAvatarUrl(): ?string
     {
         if (null === $this->avatarFileName) {
@@ -243,4 +293,124 @@ class User implements UserInterface, PasswordAuthenticatedUserInterface
     {
         $this->plainPassword = null;
     }
+
+    public function isEmployee(): bool
+    {
+        return $this->isEmployee;
+    }
+
+    public function setIsEmployee(bool $isEmployee): static
+    {
+        $this->isEmployee = $isEmployee;
+
+        return $this;
+    }
+
+    public function getHireDate(): ?DateTimeImmutable
+    {
+        return $this->hireDate;
+    }
+
+    public function setHireDate(?DateTimeImmutable $hireDate): static
+    {
+        $this->hireDate = $hireDate;
+
+        return $this;
+    }
+
+    public function getEndDate(): ?DateTimeImmutable
+    {
+        return $this->endDate;
+    }
+
+    public function setEndDate(?DateTimeImmutable $endDate): static
+    {
+        $this->endDate = $endDate;
+
+        return $this;
+    }
+
+    public function getContractType(): ?ContractType
+    {
+        return $this->contractType;
+    }
+
+    public function setContractType(?ContractType $contractType): static
+    {
+        $this->contractType = $contractType;
+
+        return $this;
+    }
+
+    public function getWorkTimeRatio(): float
+    {
+        return $this->workTimeRatio;
+    }
+
+    public function setWorkTimeRatio(float $workTimeRatio): static
+    {
+        $this->workTimeRatio = $workTimeRatio;
+
+        return $this;
+    }
+
+    public function getAnnualLeaveDays(): float
+    {
+        return $this->annualLeaveDays;
+    }
+
+    public function setAnnualLeaveDays(float $annualLeaveDays): static
+    {
+        $this->annualLeaveDays = $annualLeaveDays;
+
+        return $this;
+    }
+
+    public function getReferencePeriodStart(): string
+    {
+        return $this->referencePeriodStart;
+    }
+
+    public function setReferencePeriodStart(string $referencePeriodStart): static
+    {
+        $this->referencePeriodStart = $referencePeriodStart;
+
+        return $this;
+    }
+
+    public function getInitialLeaveBalance(): float
+    {
+        return $this->initialLeaveBalance;
+    }
+
+    public function setInitialLeaveBalance(float $initialLeaveBalance): static
+    {
+        $this->initialLeaveBalance = $initialLeaveBalance;
+
+        return $this;
+    }
+
+    public function getFamilySituation(): ?FamilySituation
+    {
+        return $this->familySituation;
+    }
+
+    public function setFamilySituation(?FamilySituation $familySituation): static
+    {
+        $this->familySituation = $familySituation;
+
+        return $this;
+    }
+
+    public function getNbChildren(): int
+    {
+        return $this->nbChildren;
+    }
+
+    public function setNbChildren(int $nbChildren): static
+    {
+        $this->nbChildren = $nbChildren;
+
+        return $this;
+    }
 }
diff --git a/src/Enum/AbsenceStatus.php b/src/Enum/AbsenceStatus.php
new file mode 100644
index 0000000..ce45714
--- /dev/null
+++ b/src/Enum/AbsenceStatus.php
@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Enum;
+
+enum AbsenceStatus: string
+{
+    case Pending   = 'pending';
+    case Approved  = 'approved';
+    case Rejected  = 'rejected';
+    case Cancelled = 'cancelled';
+
+    public function label(): string
+    {
+        return match ($this) {
+            self::Pending   => 'En attente',
+            self::Approved  => 'Approuvée',
+            self::Rejected  => 'Refusée',
+            self::Cancelled => 'Annulée',
+        };
+    }
+}
diff --git a/src/Enum/AbsenceType.php b/src/Enum/AbsenceType.php
new file mode 100644
index 0000000..c868e32
--- /dev/null
+++ b/src/Enum/AbsenceType.php
@@ -0,0 +1,34 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Enum;
+
+enum AbsenceType: string
+{
+    case PaidLeave     = 'cp';
+    case MarriagePacs  = 'mariage_pacs';
+    case ParentalLeave = 'conge_parental';
+    case Bereavement   = 'deces';
+    case SickLeave     = 'maladie';
+
+    public function label(): string
+    {
+        return match ($this) {
+            self::PaidLeave     => 'Congés payés',
+            self::MarriagePacs  => 'Mariage / PACS',
+            self::ParentalLeave => 'Congé parental',
+            self::Bereavement   => 'Décès proche',
+            self::SickLeave     => 'Arrêt maladie',
+        };
+    }
+
+    /**
+     * Whether taking this absence decrements a balance.
+     * Sick leave is managed by social security and has no balance.
+     */
+    public function decrementsBalance(): bool
+    {
+        return self::SickLeave !== $this;
+    }
+}
diff --git a/src/Enum/ContractType.php b/src/Enum/ContractType.php
new file mode 100644
index 0000000..fe1d7b1
--- /dev/null
+++ b/src/Enum/ContractType.php
@@ -0,0 +1,25 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Enum;
+
+enum ContractType: string
+{
+    case Cdi        = 'CDI';
+    case Cdd        = 'CDD';
+    case Internship = 'STAGE';
+    case Apprentice = 'ALTERNANCE';
+    case Other      = 'AUTRE';
+
+    public function label(): string
+    {
+        return match ($this) {
+            self::Cdi        => 'CDI',
+            self::Cdd        => 'CDD',
+            self::Internship => 'Stage',
+            self::Apprentice => 'Alternance',
+            self::Other      => 'Autre',
+        };
+    }
+}
diff --git a/src/Enum/FamilySituation.php b/src/Enum/FamilySituation.php
new file mode 100644
index 0000000..938498b
--- /dev/null
+++ b/src/Enum/FamilySituation.php
@@ -0,0 +1,25 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Enum;
+
+enum FamilySituation: string
+{
+    case Single   = 'CELIBATAIRE';
+    case Married  = 'MARIE';
+    case Pacsed   = 'PACSE';
+    case Divorced = 'DIVORCE';
+    case Widowed  = 'VEUF';
+
+    public function label(): string
+    {
+        return match ($this) {
+            self::Single   => 'Célibataire',
+            self::Married  => 'Marié(e)',
+            self::Pacsed   => 'Pacsé(e)',
+            self::Divorced => 'Divorcé(e)',
+            self::Widowed  => 'Veuf(ve)',
+        };
+    }
+}
diff --git a/src/Enum/HalfDay.php b/src/Enum/HalfDay.php
new file mode 100644
index 0000000..fa868f3
--- /dev/null
+++ b/src/Enum/HalfDay.php
@@ -0,0 +1,19 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Enum;
+
+enum HalfDay: string
+{
+    case Morning   = 'matin';
+    case Afternoon = 'apres_midi';
+
+    public function label(): string
+    {
+        return match ($this) {
+            self::Morning   => 'Matin',
+            self::Afternoon => 'Après-midi',
+        };
+    }
+}
diff --git a/src/Repository/AbsenceBalanceRepository.php b/src/Repository/AbsenceBalanceRepository.php
new file mode 100644
index 0000000..9e74b73
--- /dev/null
+++ b/src/Repository/AbsenceBalanceRepository.php
@@ -0,0 +1,31 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Repository;
+
+use App\Entity\AbsenceBalance;
+use App\Entity\User;
+use App\Enum\AbsenceType;
+use Doctrine\Bundle\DoctrineBundle\Repository\ServiceEntityRepository;
+use Doctrine\Persistence\ManagerRegistry;
+
+/**
+ * @extends ServiceEntityRepository<AbsenceBalance>
+ */
+class AbsenceBalanceRepository extends ServiceEntityRepository
+{
+    public function __construct(ManagerRegistry $registry)
+    {
+        parent::__construct($registry, AbsenceBalance::class);
+    }
+
+    public function findOneForPeriod(User $user, AbsenceType $type, string $period): ?AbsenceBalance
+    {
+        return $this->findOneBy([
+            'user'   => $user,
+            'type'   => $type,
+            'period' => $period,
+        ]);
+    }
+}
diff --git a/src/Repository/AbsencePolicyRepository.php b/src/Repository/AbsencePolicyRepository.php
new file mode 100644
index 0000000..b1467a7
--- /dev/null
+++ b/src/Repository/AbsencePolicyRepository.php
@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Repository;
+
+use App\Entity\AbsencePolicy;
+use App\Enum\AbsenceType;
+use Doctrine\Bundle\DoctrineBundle\Repository\ServiceEntityRepository;
+use Doctrine\Persistence\ManagerRegistry;
+
+/**
+ * @extends ServiceEntityRepository<AbsencePolicy>
+ */
+class AbsencePolicyRepository extends ServiceEntityRepository
+{
+    public function __construct(ManagerRegistry $registry)
+    {
+        parent::__construct($registry, AbsencePolicy::class);
+    }
+
+    public function findOneByType(AbsenceType $type): ?AbsencePolicy
+    {
+        return $this->findOneBy(['type' => $type]);
+    }
+}
diff --git a/src/Repository/AbsenceRequestRepository.php b/src/Repository/AbsenceRequestRepository.php
new file mode 100644
index 0000000..620755b
--- /dev/null
+++ b/src/Repository/AbsenceRequestRepository.php
@@ -0,0 +1,74 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Repository;
+
+use App\Entity\AbsenceRequest;
+use App\Entity\User;
+use App\Enum\AbsenceStatus;
+use DateTimeInterface;
+use Doctrine\Bundle\DoctrineBundle\Repository\ServiceEntityRepository;
+use Doctrine\Persistence\ManagerRegistry;
+
+/**
+ * @extends ServiceEntityRepository<AbsenceRequest>
+ */
+class AbsenceRequestRepository extends ServiceEntityRepository
+{
+    public function __construct(ManagerRegistry $registry)
+    {
+        parent::__construct($registry, AbsenceRequest::class);
+    }
+
+    /**
+     * Whether the user already has a PENDING or APPROVED absence that overlaps
+     * the given date range. Two ranges overlap when start_a <= end_b and
+     * end_a >= start_b.
+     */
+    public function hasOverlap(
+        User $user,
+        DateTimeInterface $startDate,
+        DateTimeInterface $endDate,
+        ?int $excludeId = null,
+    ): bool {
+        $qb = $this->createQueryBuilder('a')
+            ->select('COUNT(a.id)')
+            ->andWhere('a.user = :user')
+            ->andWhere('a.status IN (:statuses)')
+            ->andWhere('a.startDate <= :endDate')
+            ->andWhere('a.endDate >= :startDate')
+            ->setParameter('user', $user)
+            ->setParameter('statuses', [AbsenceStatus::Pending, AbsenceStatus::Approved])
+            ->setParameter('startDate', $startDate->format('Y-m-d'))
+            ->setParameter('endDate', $endDate->format('Y-m-d'))
+        ;
+
+        if (null !== $excludeId) {
+            $qb->andWhere('a.id != :excludeId')->setParameter('excludeId', $excludeId);
+        }
+
+        return (int) $qb->getQuery()->getSingleScalarResult() > 0;
+    }
+
+    /**
+     * Absences (approved or pending) overlapping a date range, all employees —
+     * used by the admin calendar view.
+     *
+     * @return AbsenceRequest[]
+     */
+    public function findInRange(DateTimeInterface $from, DateTimeInterface $to): array
+    {
+        return $this->createQueryBuilder('a')
+            ->andWhere('a.status IN (:statuses)')
+            ->andWhere('a.startDate <= :to')
+            ->andWhere('a.endDate >= :from')
+            ->setParameter('statuses', [AbsenceStatus::Pending, AbsenceStatus::Approved])
+            ->setParameter('from', $from->format('Y-m-d'))
+            ->setParameter('to', $to->format('Y-m-d'))
+            ->orderBy('a.startDate', 'ASC')
+            ->getQuery()
+            ->getResult()
+        ;
+    }
+}
diff --git a/src/Service/AbsenceBalanceService.php b/src/Service/AbsenceBalanceService.php
new file mode 100644
index 0000000..399cb64
--- /dev/null
+++ b/src/Service/AbsenceBalanceService.php
@@ -0,0 +1,122 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Service;
+
+use App\Entity\AbsenceBalance;
+use App\Entity\AbsenceRequest;
+use App\Entity\User;
+use App\Enum\AbsenceType;
+use App\Repository\AbsenceBalanceRepository;
+use DateTimeInterface;
+use Doctrine\ORM\EntityManagerInterface;
+
+/**
+ * Maintains per-employee leave balances as absence requests move through their
+ * lifecycle: a PENDING request reserves days in `pending`, an APPROVED one
+ * moves them to `taken`, and a cancellation gives them back.
+ */
+final readonly class AbsenceBalanceService
+{
+    public function __construct(
+        private EntityManagerInterface $entityManager,
+        private AbsenceBalanceRepository $balanceRepository,
+    ) {}
+
+    /**
+     * Reference period string for a request: paid leave follows the employee's
+     * reference period (e.g. "2025-2026"), other types are tracked yearly.
+     */
+    public function periodFor(User $user, AbsenceType $type, DateTimeInterface $date): string
+    {
+        if (AbsenceType::PaidLeave !== $type) {
+            return $date->format('Y');
+        }
+
+        $year            = (int) $date->format('Y');
+        $startMonthDay   = $user->getReferencePeriodStart(); // e.g. "06-01"
+        $currentMonthDay = $date->format('m-d');
+
+        $startYear = $currentMonthDay >= $startMonthDay ? $year : $year - 1;
+
+        return sprintf('%d-%d', $startYear, $startYear + 1);
+    }
+
+    public function getOrCreateBalance(User $user, AbsenceType $type, string $period): AbsenceBalance
+    {
+        $balance = $this->balanceRepository->findOneForPeriod($user, $type, $period);
+
+        if (null === $balance) {
+            $balance = new AbsenceBalance()
+                ->setUser($user)
+                ->setType($type)
+                ->setPeriod($period)
+            ;
+            $this->entityManager->persist($balance);
+        }
+
+        return $balance;
+    }
+
+    /** Reserve the requested days in the PENDING bucket. */
+    public function reservePending(AbsenceRequest $request): void
+    {
+        if (!$this->shouldTrack($request)) {
+            return;
+        }
+
+        $balance = $this->balanceForRequest($request);
+        $balance->setPending($balance->getPending() + $request->getCountedDays());
+    }
+
+    /** Move reserved days from PENDING to TAKEN on approval. */
+    public function applyApproval(AbsenceRequest $request): void
+    {
+        if (!$this->shouldTrack($request)) {
+            return;
+        }
+
+        $balance = $this->balanceForRequest($request);
+        $balance->setPending(max(0.0, $balance->getPending() - $request->getCountedDays()));
+        $balance->setTaken($balance->getTaken() + $request->getCountedDays());
+    }
+
+    /**
+     * Give days back when a request is cancelled or rejected.
+     *
+     * @param bool $wasApproved true if the request had already been approved
+     *                          (days were in TAKEN), false if still PENDING
+     */
+    public function release(AbsenceRequest $request, bool $wasApproved): void
+    {
+        if (!$this->shouldTrack($request)) {
+            return;
+        }
+
+        $balance = $this->balanceForRequest($request);
+
+        if ($wasApproved) {
+            $balance->setTaken(max(0.0, $balance->getTaken() - $request->getCountedDays()));
+        } else {
+            $balance->setPending(max(0.0, $balance->getPending() - $request->getCountedDays()));
+        }
+    }
+
+    private function balanceForRequest(AbsenceRequest $request): AbsenceBalance
+    {
+        /** @var User $user */
+        $user   = $request->getUser();
+        $type   = $request->getType();
+        $period = $this->periodFor($user, $type, $request->getStartDate());
+
+        return $this->getOrCreateBalance($user, $type, $period);
+    }
+
+    private function shouldTrack(AbsenceRequest $request): bool
+    {
+        $type = $request->getType();
+
+        return null !== $type && $type->decrementsBalance() && null !== $request->getUser();
+    }
+}
diff --git a/src/Service/AbsenceDayCalculator.php b/src/Service/AbsenceDayCalculator.php
new file mode 100644
index 0000000..fd8ed5a
--- /dev/null
+++ b/src/Service/AbsenceDayCalculator.php
@@ -0,0 +1,73 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Service;
+
+use App\Enum\HalfDay;
+use DateInterval;
+use DatePeriod;
+use DateTimeImmutable;
+
+/**
+ * Computes the number of days deducted for an absence request, following the
+ * business rules of the spec (§5.1): weekends and public holidays are skipped,
+ * and half-days on the boundaries subtract 0.5 each.
+ */
+final readonly class AbsenceDayCalculator
+{
+    public function __construct(
+        private PublicHolidayProvider $holidayProvider,
+    ) {}
+
+    /**
+     * @param bool $workingDaysOnly true => "jours ouvrés" (Mon-Fri),
+     *                              false => "jours ouvrables" (Mon-Sat, Sunday excluded)
+     */
+    public function countWorkingDays(
+        DateTimeImmutable $start,
+        DateTimeImmutable $end,
+        ?HalfDay $startHalfDay = null,
+        ?HalfDay $endHalfDay = null,
+        bool $workingDaysOnly = true,
+    ): float {
+        $start = $start->setTime(0, 0);
+        $end   = $end->setTime(0, 0);
+
+        if ($end < $start) {
+            return 0.0;
+        }
+
+        $days   = 0.0;
+        $period = new DatePeriod($start, new DateInterval('P1D'), $end->modify('+1 day'));
+
+        foreach ($period as $day) {
+            $weekday = (int) $day->format('N'); // 1 (Mon) .. 7 (Sun)
+
+            if (7 === $weekday) {
+                continue; // Sunday: never counted
+            }
+            if (6 === $weekday && $workingDaysOnly) {
+                continue; // Saturday: only counted for "jours ouvrables"
+            }
+            if ($this->holidayProvider->isHoliday($day)) {
+                continue;
+            }
+
+            ++$days;
+        }
+
+        if ($days <= 0.0) {
+            return 0.0;
+        }
+
+        if (null !== $startHalfDay) {
+            $days -= 0.5;
+        }
+        if (null !== $endHalfDay) {
+            $days -= 0.5;
+        }
+
+        return max(0.0, $days);
+    }
+}
diff --git a/src/Service/PublicHolidayProvider.php b/src/Service/PublicHolidayProvider.php
new file mode 100644
index 0000000..1897757
--- /dev/null
+++ b/src/Service/PublicHolidayProvider.php
@@ -0,0 +1,86 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Service;
+
+use DateTimeImmutable;
+use DateTimeInterface;
+
+/**
+ * Provides French métropole public holidays.
+ *
+ * Dates are computed in pure PHP: fixed-date holidays are hardcoded and
+ * Easter-based ones are derived from the Computus (Meeus/Jones/Butcher
+ * Gregorian algorithm), so the provider has no runtime dependency and is
+ * fully deterministic. Alsace-Moselle / DOM specifics are out of scope.
+ */
+final class PublicHolidayProvider
+{
+    /** @var array<int, array<string, string>> cache of holidays per year */
+    private array $cache = [];
+
+    /**
+     * @return array<string, string> map of 'Y-m-d' => label, sorted by date
+     */
+    public function getHolidays(int $year): array
+    {
+        if (isset($this->cache[$year])) {
+            return $this->cache[$year];
+        }
+
+        $easter       = $this->easterSunday($year);
+        $easterMonday = $easter->modify('+1 day');
+        $ascension    = $easter->modify('+39 days');
+        $whitMonday   = $easter->modify('+50 days');
+
+        $holidays = [
+            sprintf('%d-01-01', $year)     => 'Jour de l\'an',
+            $easterMonday->format('Y-m-d') => 'Lundi de Pâques',
+            sprintf('%d-05-01', $year)     => 'Fête du Travail',
+            sprintf('%d-05-08', $year)     => 'Victoire 1945',
+            $ascension->format('Y-m-d')    => 'Ascension',
+            $whitMonday->format('Y-m-d')   => 'Lundi de Pentecôte',
+            sprintf('%d-07-14', $year)     => 'Fête nationale',
+            sprintf('%d-08-15', $year)     => 'Assomption',
+            sprintf('%d-11-01', $year)     => 'Toussaint',
+            sprintf('%d-11-11', $year)     => 'Armistice 1918',
+            sprintf('%d-12-25', $year)     => 'Noël',
+        ];
+
+        ksort($holidays);
+
+        return $this->cache[$year] = $holidays;
+    }
+
+    public function isHoliday(DateTimeInterface $date): bool
+    {
+        $holidays = $this->getHolidays((int) $date->format('Y'));
+
+        return isset($holidays[$date->format('Y-m-d')]);
+    }
+
+    /**
+     * Easter Sunday date for the given year (Gregorian Computus).
+     */
+    private function easterSunday(int $year): DateTimeImmutable
+    {
+        $a = $year % 19;
+        $b = intdiv($year, 100);
+        $c = $year % 100;
+        $d = intdiv($b, 4);
+        $e = $b % 4;
+        $f = intdiv($b + 8, 25);
+        $g = intdiv($b - $f + 1, 3);
+        $h = (19 * $a + $b - $d - $g + 15) % 30;
+        $i = intdiv($c, 4);
+        $k = $c % 4;
+        $l = (32 + 2 * $e + 2 * $i - $h - $k) % 7;
+        $m = intdiv($a + 11 * $h + 22 * $l, 451);
+
+        $month = intdiv($h + $l - 7 * $m + 114, 31);
+        $day   = (($h + $l - 7 * $m + 114) % 31) + 1;
+
+        return new DateTimeImmutable(sprintf('%04d-%02d-%02d', $year, $month, $day));
+    }
+}
diff --git a/src/State/AbsenceBalanceProvider.php b/src/State/AbsenceBalanceProvider.php
new file mode 100644
index 0000000..d155efa
--- /dev/null
+++ b/src/State/AbsenceBalanceProvider.php
@@ -0,0 +1,73 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\State;
+
+use ApiPlatform\Metadata\Operation;
+use ApiPlatform\State\ProviderInterface;
+use App\Entity\AbsenceBalance;
+use App\Entity\User;
+use Doctrine\ORM\EntityManagerInterface;
+use Symfony\Bundle\SecurityBundle\Security;
+
+/**
+ * @implements ProviderInterface<AbsenceBalance>
+ */
+final readonly class AbsenceBalanceProvider implements ProviderInterface
+{
+    public function __construct(
+        private EntityManagerInterface $entityManager,
+        private Security $security,
+    ) {}
+
+    public function provide(Operation $operation, array $uriVariables = [], array $context = []): AbsenceBalance|array|null
+    {
+        $user = $this->security->getUser();
+        assert($user instanceof User);
+
+        $repo    = $this->entityManager->getRepository(AbsenceBalance::class);
+        $isAdmin = $this->security->isGranted('ROLE_ADMIN');
+
+        if (isset($uriVariables['id'])) {
+            $balance = $repo->find($uriVariables['id']);
+            if (null === $balance) {
+                return null;
+            }
+            if (!$isAdmin && $balance->getUser() !== $user) {
+                return null;
+            }
+
+            return $balance;
+        }
+
+        $qb = $repo->createQueryBuilder('b')
+            ->orderBy('b.type', 'ASC')
+        ;
+
+        if (!$isAdmin) {
+            $qb->andWhere('b.user = :user')->setParameter('user', $user);
+        }
+
+        $filters = $context['filters'] ?? [];
+
+        if (isset($filters['type'])) {
+            $qb->andWhere('b.type = :type')->setParameter('type', $filters['type']);
+        }
+        if (isset($filters['period'])) {
+            $qb->andWhere('b.period = :period')->setParameter('period', $filters['period']);
+        }
+        if ($isAdmin && isset($filters['user'])) {
+            $qb->andWhere('b.user = :filterUser')
+                ->setParameter('filterUser', self::extractId($filters['user']))
+            ;
+        }
+
+        return $qb->getQuery()->getResult();
+    }
+
+    private static function extractId(string $value): int
+    {
+        return is_numeric($value) ? (int) $value : (int) basename($value);
+    }
+}
diff --git a/src/State/AbsenceCancelProcessor.php b/src/State/AbsenceCancelProcessor.php
new file mode 100644
index 0000000..59b9e0f
--- /dev/null
+++ b/src/State/AbsenceCancelProcessor.php
@@ -0,0 +1,75 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\State;
+
+use ApiPlatform\Metadata\Operation;
+use ApiPlatform\State\ProcessorInterface;
+use App\Entity\AbsenceRequest;
+use App\Enum\AbsenceStatus;
+use App\Service\AbsenceBalanceService;
+use Doctrine\ORM\EntityManagerInterface;
+use Symfony\Bundle\SecurityBundle\Security;
+use Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException;
+use Symfony\Component\HttpKernel\Exception\ConflictHttpException;
+
+/**
+ * Cancellation of an absence request. An employee may cancel their own PENDING
+ * request; an admin may additionally cancel an APPROVED one, which credits the
+ * deducted days back to the balance.
+ *
+ * @implements ProcessorInterface<AbsenceRequest, AbsenceRequest>
+ */
+final readonly class AbsenceCancelProcessor implements ProcessorInterface
+{
+    public function __construct(
+        private EntityManagerInterface $entityManager,
+        private Security $security,
+        private AbsenceBalanceService $balanceService,
+    ) {}
+
+    public function process(mixed $data, Operation $operation, array $uriVariables = [], array $context = []): AbsenceRequest
+    {
+        assert($data instanceof AbsenceRequest);
+
+        // Cancellation carries no payload: keep the persisted content intact.
+        $previous = $context['previous_data'] ?? null;
+        if ($previous instanceof AbsenceRequest) {
+            $data->setType($previous->getType());
+            $data->setStartDate($previous->getStartDate());
+            $data->setEndDate($previous->getEndDate());
+            $data->setStartHalfDay($previous->getStartHalfDay());
+            $data->setEndHalfDay($previous->getEndHalfDay());
+            $data->setReason($previous->getReason());
+            $data->setCountedDays($previous->getCountedDays());
+            $data->setStatus($previous->getStatus());
+        }
+
+        $user    = $this->security->getUser();
+        $isAdmin = $this->security->isGranted('ROLE_ADMIN');
+        $status  = $data->getStatus();
+
+        if (AbsenceStatus::Pending === $status) {
+            $this->balanceService->release($data, false);
+        } elseif (AbsenceStatus::Approved === $status) {
+            if (!$isAdmin) {
+                throw new AccessDeniedHttpException('Only an admin can cancel an approved request.');
+            }
+            $this->balanceService->release($data, true);
+        } else {
+            throw new ConflictHttpException('This request can no longer be cancelled.');
+        }
+
+        // An employee may only cancel their own request (admins can cancel any).
+        if (!$isAdmin && $data->getUser() !== $user) {
+            throw new AccessDeniedHttpException('You can only cancel your own requests.');
+        }
+
+        $data->setStatus(AbsenceStatus::Cancelled);
+
+        $this->entityManager->flush();
+
+        return $data;
+    }
+}
diff --git a/src/State/AbsenceRequestProcessor.php b/src/State/AbsenceRequestProcessor.php
new file mode 100644
index 0000000..4322195
--- /dev/null
+++ b/src/State/AbsenceRequestProcessor.php
@@ -0,0 +1,91 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\State;
+
+use ApiPlatform\Metadata\Operation;
+use ApiPlatform\State\ProcessorInterface;
+use App\Entity\AbsenceRequest;
+use App\Entity\User;
+use App\Enum\AbsenceStatus;
+use App\Repository\AbsencePolicyRepository;
+use App\Repository\AbsenceRequestRepository;
+use App\Service\AbsenceBalanceService;
+use App\Service\AbsenceDayCalculator;
+use DateTimeImmutable;
+use Doctrine\ORM\EntityManagerInterface;
+use Symfony\Bundle\SecurityBundle\Security;
+use Symfony\Component\HttpKernel\Exception\ConflictHttpException;
+use Symfony\Component\HttpKernel\Exception\UnprocessableEntityHttpException;
+
+/**
+ * Handles creation of an absence request: computes the deducted days, enforces
+ * the overlap rule, and reserves the days in the employee's pending balance.
+ *
+ * @implements ProcessorInterface<AbsenceRequest, AbsenceRequest>
+ */
+final readonly class AbsenceRequestProcessor implements ProcessorInterface
+{
+    public function __construct(
+        private EntityManagerInterface $entityManager,
+        private Security $security,
+        private AbsenceDayCalculator $calculator,
+        private AbsencePolicyRepository $policyRepository,
+        private AbsenceRequestRepository $requestRepository,
+        private AbsenceBalanceService $balanceService,
+    ) {}
+
+    public function process(mixed $data, Operation $operation, array $uriVariables = [], array $context = []): AbsenceRequest
+    {
+        assert($data instanceof AbsenceRequest);
+
+        $user = $this->security->getUser();
+        assert($user instanceof User);
+
+        $type      = $data->getType();
+        $startDate = $data->getStartDate();
+        $endDate   = $data->getEndDate();
+
+        if (null === $type || null === $startDate || null === $endDate) {
+            throw new UnprocessableEntityHttpException('Type, start date and end date are required.');
+        }
+
+        if ($endDate < $startDate) {
+            throw new UnprocessableEntityHttpException('End date must be on or after start date.');
+        }
+
+        $policy = $this->policyRepository->findOneByType($type);
+        if (null === $policy || !$policy->isActive()) {
+            throw new UnprocessableEntityHttpException('This absence type is not available.');
+        }
+
+        if ($this->requestRepository->hasOverlap($user, $startDate, $endDate)) {
+            throw new ConflictHttpException('This request overlaps an existing absence.');
+        }
+
+        $countedDays = $this->calculator->countWorkingDays(
+            $startDate,
+            $endDate,
+            $data->getStartHalfDay(),
+            $data->getEndHalfDay(),
+            $policy->isCountWorkingDaysOnly(),
+        );
+
+        if ($countedDays <= 0.0) {
+            throw new UnprocessableEntityHttpException('The selected range contains no working day.');
+        }
+
+        $data->setUser($user);
+        $data->setCountedDays($countedDays);
+        $data->setStatus(AbsenceStatus::Pending);
+        $data->setRejectionReason(null);
+        $data->setCreatedAt(new DateTimeImmutable());
+
+        $this->entityManager->persist($data);
+        $this->balanceService->reservePending($data);
+        $this->entityManager->flush();
+
+        return $data;
+    }
+}
diff --git a/src/State/AbsenceRequestProvider.php b/src/State/AbsenceRequestProvider.php
new file mode 100644
index 0000000..0e05508
--- /dev/null
+++ b/src/State/AbsenceRequestProvider.php
@@ -0,0 +1,82 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\State;
+
+use ApiPlatform\Metadata\Operation;
+use ApiPlatform\State\ProviderInterface;
+use App\Entity\AbsenceRequest;
+use App\Entity\User;
+use Doctrine\ORM\EntityManagerInterface;
+use Symfony\Bundle\SecurityBundle\Security;
+
+/**
+ * @implements ProviderInterface<AbsenceRequest>
+ */
+final readonly class AbsenceRequestProvider implements ProviderInterface
+{
+    public function __construct(
+        private EntityManagerInterface $entityManager,
+        private Security $security,
+    ) {}
+
+    public function provide(Operation $operation, array $uriVariables = [], array $context = []): AbsenceRequest|array|null
+    {
+        $user = $this->security->getUser();
+        assert($user instanceof User);
+
+        $repo    = $this->entityManager->getRepository(AbsenceRequest::class);
+        $isAdmin = $this->security->isGranted('ROLE_ADMIN');
+
+        // Single item: owner or admin only
+        if (isset($uriVariables['id'])) {
+            $request = $repo->find($uriVariables['id']);
+            if (null === $request) {
+                return null;
+            }
+            if (!$isAdmin && $request->getUser() !== $user) {
+                return null;
+            }
+
+            return $request;
+        }
+
+        $qb = $repo->createQueryBuilder('a')
+            ->orderBy('a.createdAt', 'DESC')
+        ;
+
+        if (!$isAdmin) {
+            $qb->andWhere('a.user = :user')->setParameter('user', $user);
+        }
+
+        $filters = $context['filters'] ?? [];
+
+        if (isset($filters['status'])) {
+            $qb->andWhere('a.status = :status')->setParameter('status', $filters['status']);
+        }
+        if (isset($filters['type'])) {
+            $qb->andWhere('a.type = :type')->setParameter('type', $filters['type']);
+        }
+        if (isset($filters['year']) && is_numeric($filters['year'])) {
+            $year = (int) $filters['year'];
+            $qb->andWhere('a.startDate <= :yearEnd')
+                ->andWhere('a.endDate >= :yearStart')
+                ->setParameter('yearStart', sprintf('%d-01-01', $year))
+                ->setParameter('yearEnd', sprintf('%d-12-31', $year))
+            ;
+        }
+        if ($isAdmin && isset($filters['user'])) {
+            $qb->andWhere('a.user = :filterUser')
+                ->setParameter('filterUser', self::extractId($filters['user']))
+            ;
+        }
+
+        return $qb->getQuery()->getResult();
+    }
+
+    private static function extractId(string $value): int
+    {
+        return is_numeric($value) ? (int) $value : (int) basename($value);
+    }
+}
diff --git a/src/State/AbsenceReviewProcessor.php b/src/State/AbsenceReviewProcessor.php
new file mode 100644
index 0000000..9e8a881
--- /dev/null
+++ b/src/State/AbsenceReviewProcessor.php
@@ -0,0 +1,80 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\State;
+
+use ApiPlatform\Metadata\Operation;
+use ApiPlatform\State\ProcessorInterface;
+use App\Entity\AbsenceRequest;
+use App\Entity\User;
+use App\Enum\AbsenceStatus;
+use App\Service\AbsenceBalanceService;
+use DateTimeImmutable;
+use Doctrine\ORM\EntityManagerInterface;
+use Symfony\Bundle\SecurityBundle\Security;
+use Symfony\Component\HttpKernel\Exception\ConflictHttpException;
+use Symfony\Component\HttpKernel\Exception\UnprocessableEntityHttpException;
+
+/**
+ * Admin approval / rejection of a pending absence request. The target status
+ * is derived from the operation URI (.../approve or .../reject).
+ *
+ * @implements ProcessorInterface<AbsenceRequest, AbsenceRequest>
+ */
+final readonly class AbsenceReviewProcessor implements ProcessorInterface
+{
+    public function __construct(
+        private EntityManagerInterface $entityManager,
+        private Security $security,
+        private AbsenceBalanceService $balanceService,
+    ) {}
+
+    public function process(mixed $data, Operation $operation, array $uriVariables = [], array $context = []): AbsenceRequest
+    {
+        assert($data instanceof AbsenceRequest);
+
+        $isApprove          = str_contains((string) $operation->getUriTemplate(), 'approve');
+        $newRejectionReason = $data->getRejectionReason();
+
+        // Reviewing must never alter the request content: restore everything
+        // from the persisted state, only status/review fields may change.
+        $previous = $context['previous_data'] ?? null;
+        if ($previous instanceof AbsenceRequest) {
+            $data->setType($previous->getType());
+            $data->setStartDate($previous->getStartDate());
+            $data->setEndDate($previous->getEndDate());
+            $data->setStartHalfDay($previous->getStartHalfDay());
+            $data->setEndHalfDay($previous->getEndHalfDay());
+            $data->setReason($previous->getReason());
+            $data->setCountedDays($previous->getCountedDays());
+        }
+
+        if (AbsenceStatus::Pending !== $data->getStatus()) {
+            throw new ConflictHttpException('Only a pending request can be reviewed.');
+        }
+
+        $admin = $this->security->getUser();
+        assert($admin instanceof User);
+
+        if ($isApprove) {
+            $data->setStatus(AbsenceStatus::Approved);
+            $data->setRejectionReason(null);
+            $this->balanceService->applyApproval($data);
+        } else {
+            if (null === $newRejectionReason || '' === trim($newRejectionReason)) {
+                throw new UnprocessableEntityHttpException('A reason is required when rejecting a request.');
+            }
+            $data->setStatus(AbsenceStatus::Rejected);
+            $data->setRejectionReason($newRejectionReason);
+            $this->balanceService->release($data, false);
+        }
+
+        $data->setReviewedAt(new DateTimeImmutable());
+        $data->setReviewedBy($admin);
+
+        $this->entityManager->flush();
+
+        return $data;
+    }
+}
diff --git a/tests/Unit/Service/AbsenceDayCalculatorTest.php b/tests/Unit/Service/AbsenceDayCalculatorTest.php
new file mode 100644
index 0000000..591763e
--- /dev/null
+++ b/tests/Unit/Service/AbsenceDayCalculatorTest.php
@@ -0,0 +1,92 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Unit\Service;
+
+use App\Enum\HalfDay;
+use App\Service\AbsenceDayCalculator;
+use App\Service\PublicHolidayProvider;
+use DateTimeImmutable;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * @internal
+ */
+class AbsenceDayCalculatorTest extends TestCase
+{
+    private AbsenceDayCalculator $calculator;
+
+    protected function setUp(): void
+    {
+        $this->calculator = new AbsenceDayCalculator(new PublicHolidayProvider());
+    }
+
+    public function testFullWeekIsFiveWorkingDays(): void
+    {
+        // Mon 2026-06-01 to Fri 2026-06-05, no holidays that week
+        self::assertSame(5.0, $this->calculator->countWorkingDays(
+            new DateTimeImmutable('2026-06-01'),
+            new DateTimeImmutable('2026-06-05'),
+        ));
+    }
+
+    public function testWeekendIsSkipped(): void
+    {
+        // Fri 2026-06-05 to Mon 2026-06-08 => Fri + Mon = 2
+        self::assertSame(2.0, $this->calculator->countWorkingDays(
+            new DateTimeImmutable('2026-06-05'),
+            new DateTimeImmutable('2026-06-08'),
+        ));
+    }
+
+    public function testHolidayIsSkipped(): void
+    {
+        // Thu 2026-05-07 to Fri 2026-05-08 (Victoire 1945) => Thu only = 1
+        self::assertSame(1.0, $this->calculator->countWorkingDays(
+            new DateTimeImmutable('2026-05-07'),
+            new DateTimeImmutable('2026-05-08'),
+        ));
+    }
+
+    public function testHalfDayStartSubtractsHalf(): void
+    {
+        self::assertSame(4.5, $this->calculator->countWorkingDays(
+            new DateTimeImmutable('2026-06-01'),
+            new DateTimeImmutable('2026-06-05'),
+            HalfDay::Afternoon,
+        ));
+    }
+
+    public function testBothHalfDaysSubtractOne(): void
+    {
+        self::assertSame(4.0, $this->calculator->countWorkingDays(
+            new DateTimeImmutable('2026-06-01'),
+            new DateTimeImmutable('2026-06-05'),
+            HalfDay::Afternoon,
+            HalfDay::Morning,
+        ));
+    }
+
+    public function testSingleHalfDay(): void
+    {
+        self::assertSame(0.5, $this->calculator->countWorkingDays(
+            new DateTimeImmutable('2026-06-01'),
+            new DateTimeImmutable('2026-06-01'),
+            HalfDay::Morning,
+        ));
+    }
+
+    public function testWorkingDaysVsOpenDays(): void
+    {
+        // Fri 2026-06-05 to Mon 2026-06-08, "ouvrables" includes Saturday
+        // => Fri + Sat + Mon = 3 (Sunday always skipped)
+        self::assertSame(3.0, $this->calculator->countWorkingDays(
+            new DateTimeImmutable('2026-06-05'),
+            new DateTimeImmutable('2026-06-08'),
+            null,
+            null,
+            false,
+        ));
+    }
+}
diff --git a/tests/Unit/Service/PublicHolidayProviderTest.php b/tests/Unit/Service/PublicHolidayProviderTest.php
new file mode 100644
index 0000000..ff1716c
--- /dev/null
+++ b/tests/Unit/Service/PublicHolidayProviderTest.php
@@ -0,0 +1,72 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Unit\Service;
+
+use App\Service\PublicHolidayProvider;
+use DateTimeImmutable;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * @internal
+ */
+class PublicHolidayProviderTest extends TestCase
+{
+    private PublicHolidayProvider $provider;
+
+    protected function setUp(): void
+    {
+        $this->provider = new PublicHolidayProvider();
+    }
+
+    public function testReturnsElevenHolidaysForMetropole(): void
+    {
+        self::assertCount(11, $this->provider->getHolidays(2026));
+    }
+
+    public function testFixedHolidaysHaveCorrectLabels(): void
+    {
+        $holidays = $this->provider->getHolidays(2026);
+
+        self::assertSame('Jour de l\'an', $holidays['2026-01-01']);
+        self::assertSame('Fête du Travail', $holidays['2026-05-01']);
+        self::assertSame('Victoire 1945', $holidays['2026-05-08']);
+        self::assertSame('Fête nationale', $holidays['2026-07-14']);
+        self::assertSame('Assomption', $holidays['2026-08-15']);
+        self::assertSame('Toussaint', $holidays['2026-11-01']);
+        self::assertSame('Armistice 1918', $holidays['2026-11-11']);
+        self::assertSame('Noël', $holidays['2026-12-25']);
+    }
+
+    /**
+     * Easter 2026 is April 5th, so Easter Monday is April 6th,
+     * Ascension is May 14th and Whit Monday is May 25th.
+     */
+    public function testEasterBasedHolidays2026(): void
+    {
+        $holidays = $this->provider->getHolidays(2026);
+
+        self::assertSame('Lundi de Pâques', $holidays['2026-04-06']);
+        self::assertSame('Ascension', $holidays['2026-05-14']);
+        self::assertSame('Lundi de Pentecôte', $holidays['2026-05-25']);
+    }
+
+    /**
+     * Easter 2025 is April 20th, so Easter Monday is April 21st.
+     */
+    public function testEasterBasedHolidays2025(): void
+    {
+        $holidays = $this->provider->getHolidays(2025);
+
+        self::assertSame('Lundi de Pâques', $holidays['2025-04-21']);
+    }
+
+    public function testIsHoliday(): void
+    {
+        self::assertTrue($this->provider->isHoliday(new DateTimeImmutable('2026-05-01')));
+        self::assertTrue($this->provider->isHoliday(new DateTimeImmutable('2026-05-14')));
+        self::assertFalse($this->provider->isHoliday(new DateTimeImmutable('2026-05-02')));
+        self::assertFalse($this->provider->isHoliday(new DateTimeImmutable('2026-06-01')));
+    }
+}