Use symfony

.env

@@ -1 +1,9 @@
-APP_ENV=dev
+APP_ENV=dev
+###> symfony/framework-bundle ###
+APP_ENV=dev
+APP_SECRET=akwhdaeuifzuieshuikjfjk
+###< symfony/framework-bundle ###
+
+###> application ###
+REQUIRED_API_KEY=74857389798572903480209489024
+###< application ###

.env.dev

@@ -0,0 +1,4 @@
+
+###> symfony/framework-bundle ###
+APP_SECRET=8195be78f871a87592025f227ca9c3a6
+###< symfony/framework-bundle ###

.gitignore

@@ -3,4 +3,13 @@
 .env.test.local
 .idea
 vendor
-var/
+var/
+###> symfony/framework-bundle ###
+/.env.local
+/.env.local.php
+/.env.*.local
+/config/secrets/prod/prod.decrypt.private.php
+/public/bundles/
+/var/
+/vendor/
+###< symfony/framework-bundle ###

README.md

@@ -0,0 +1,28 @@
+# Work Calendar
+
+A PHP application for managing work calendar and absences.
+
+## Project Structure
+
+The project follows a clean architecture pattern with the following components:
+
+- **Model**: Contains domain models like `Absence`
+- **Service**: Contains service classes for business logic
+  - `AbsenceClient`: Handles API communication with the absence.io service
+  - `AbsenceManager`: Manages absence data retrieval and caching
+  - `CalendarService`: Handles calendar generation and processing
+
+## Recent Improvements
+
+- Added proper domain model for `Absence` to encapsulate absence data and behavior
+- Improved service classes with better separation of concerns
+- Added caching for improved performance
+- Improved error handling in API client
+- Removed code duplication
+- Added early returns for cleaner code flow
+
+## Requirements
+
+- PHP 8.1 or higher
+- Composer
+- Absence.io API credentials (KEY and ID) 

bin/console

@@ -0,0 +1,21 @@
+#!/usr/bin/env php
+<?php
+
+use App\Kernel;
+use Symfony\Bundle\FrameworkBundle\Console\Application;
+
+if (!is_dir(dirname(__DIR__).'/vendor')) {
+    throw new LogicException('Dependencies are missing. Try running "composer install".');
+}
+
+if (!is_file(dirname(__DIR__).'/vendor/autoload_runtime.php')) {
+    throw new LogicException('Symfony Runtime is missing. Try running "composer require symfony/runtime".');
+}
+
+require_once dirname(__DIR__).'/vendor/autoload_runtime.php';
+
+return function (array $context) {
+    $kernel = new Kernel($context['APP_ENV'], (bool) $context['APP_DEBUG']);
+
+    return new Application($kernel);
+};

composer.json

@@ -1,16 +1,45 @@
 {
+  "type": "project",
+  "license": "proprietary",
+  "minimum-stability": "stable",
+  "prefer-stable": true,
+  "require": {
+    "php": "^8.2",
+    "ext-intl": "*",
+    "dflydev/hawk": "^0.0.0",
+    "guzzlehttp/guzzle": "^7.9",
+    "symfony/console": "^7.1",
+    "symfony/dotenv": "^7.1",
+    "symfony/flex": "^2.4",
+    "symfony/framework-bundle": "^7.1",
+    "symfony/http-client": "^7.1",
+    "symfony/http-foundation": "^7.1",
+    "symfony/http-kernel": "^7.1",
+    "symfony/runtime": "^7.1",
+    "symfony/string": "^7.1",
+    "symfony/twig-bundle": "^7.1",
+    "symfony/yaml": "^7.1"
+  },
+  "config": {
+    "allow-plugins": {
+      "symfony/flex": true,
+      "symfony/runtime": true
+    },
+    "sort-packages": true
+  },
   "autoload": {
     "psr-4": {
       "App\\": "src/"
     }
   },
-  "require": {
+  "scripts": {
-    "php": "^8.2",
+    "auto-scripts": {
-    "symfony/http-client": "^7.1",
+      "cache:clear": "symfony-cmd",
-    "dflydev/hawk": "^0.0.0",
+      "assets:install %PUBLIC_DIR%": "symfony-cmd"
-    "guzzlehttp/guzzle": "^7.9",
+    }
-    "symfony/dotenv": "^7.1",
+  },
-    "symfony/cache": "^7.1",
+  "require-dev": {
-    "ext-intl": "*"
+    "symfony/stopwatch": "^7.1",
+    "symfony/web-profiler-bundle": "^7.1"
   }
 }

config/bundles.php

@@ -0,0 +1,7 @@
+<?php
+
+return [
+    Symfony\Bundle\FrameworkBundle\FrameworkBundle::class => ['all' => true],
+    Symfony\Bundle\TwigBundle\TwigBundle::class => ['all' => true],
+    Symfony\Bundle\WebProfilerBundle\WebProfilerBundle::class => ['dev' => true, 'test' => true],
+];

config/packages/cache.yaml

@@ -0,0 +1,19 @@
+framework:
+    cache:
+        # Unique name of your app: used to compute stable namespaces for cache keys.
+        #prefix_seed: your_vendor_name/app_name
+
+        # The "app" cache stores to the filesystem by default.
+        # The data in this cache should persist between deploys.
+        # Other options include:
+
+        # Redis
+        #app: cache.adapter.redis
+        #default_redis_provider: redis://localhost
+
+        # APCu (not recommended with heavy random-write workloads as memory fragmentation can cause perf issues)
+        #app: cache.adapter.apcu
+
+        # Namespaced pools use the above "app" backend by default
+        #pools:
+            #my.dedicated.cache: null

config/packages/framework.yaml

@@ -0,0 +1,11 @@
+framework:
+    secret: '%env(APP_SECRET)%'
+    http_method_override: false
+    handle_all_throwables: true
+    session:
+        handler_id: null
+        cookie_secure: auto
+        cookie_samesite: lax
+        storage_factory_id: session.storage.factory.native
+    php_errors:
+        log: true 

config/packages/routing.yaml

@@ -0,0 +1,10 @@
+framework:
+    router:
+        # Configure how to generate URLs in non-HTTP contexts, such as CLI commands.
+        # See https://symfony.com/doc/current/routing.html#generating-urls-in-commands
+        #default_uri: http://localhost
+
+when@prod:
+    framework:
+        router:
+            strict_requirements: null

config/packages/twig.yaml

@@ -0,0 +1,6 @@
+twig:
+    file_name_pattern: '*.twig'
+
+when@test:
+    twig:
+        strict_variables: true

config/packages/web_profiler.yaml

@@ -0,0 +1,17 @@
+when@dev:
+    web_profiler:
+        toolbar: true
+        intercept_redirects: false
+
+    framework:
+        profiler:
+            only_exceptions: false
+            collect_serializer_data: true
+
+when@test:
+    web_profiler:
+        toolbar: false
+        intercept_redirects: false
+
+    framework:
+        profiler: { collect: false }

config/preload.php

@@ -0,0 +1,5 @@
+<?php
+
+if (file_exists(dirname(__DIR__).'/var/cache/prod/App_KernelProdContainer.preload.php')) {
+    require dirname(__DIR__).'/var/cache/prod/App_KernelProdContainer.preload.php';
+}

config/routes.yaml

@@ -0,0 +1,5 @@
+controllers:
+    resource:
+        path: ../src/Controller/
+        namespace: App\Controller
+    type: attribute 

config/routes/framework.yaml

@@ -0,0 +1,4 @@
+when@dev:
+    _errors:
+        resource: '@FrameworkBundle/Resources/config/routing/errors.xml'
+        prefix: /_error

config/routes/web_profiler.yaml

@@ -0,0 +1,8 @@
+when@dev:
+    web_profiler_wdt:
+        resource: '@WebProfilerBundle/Resources/config/routing/wdt.xml'
+        prefix: /_wdt
+
+    web_profiler_profiler:
+        resource: '@WebProfilerBundle/Resources/config/routing/profiler.xml'
+        prefix: /_profiler

config/secrets/dev/dev.ABSENCE_API_ID.082918.php

@@ -0,0 +1,3 @@
+<?php // dev.ABSENCE_API_ID.082918 on Thu, 13 Mar 2025 20:12:07 +0000
+
+return "i\xBF\x5D\x96J\xCF\x88\xD8\x8D7S\x9C\xBB\x2F3\x92\x18\xB4h\xF8f\xD8\xF5o\x95\x06\xD8b\xE2H\x0F\x21\xCA\xE8\xDB\xA7\x3A\xEB\x2CKk\xA8\xD3\xDA\xFC9b\xB8\x99\x1D\xC4\xC7\x8D\x2Bt\xFF\xED\x8BRzK\x83yAg\xE2\x3A\xBDH\x0Ay\xFF";

config/secrets/dev/dev.ABSENCE_API_KEY.4be562.php

@@ -0,0 +1,3 @@
+<?php // dev.ABSENCE_API_KEY.4be562 on Thu, 13 Mar 2025 20:11:36 +0000
+
+return "\x947\xDC\x11\xD9\x24\xC2\xA3v\x9D\x99n\x09\xC8\xFA\x5E\x60\x20R\x99\xD3\xC4\x2A\xEB\xB5-q\x26\xF3_\xF6k\x0D\xF9\x21\xFF\x93\x03Yv\x23h\x9A\xF8a\xEFK\x02\xE3\xEAH\x3Fr\xC1\xC4Z\x1AE\x18\x16\x7BF\xDEQ\x81A\x1Bq\x9EU\xD5P\xC2s\xAF\xDA\x3D\x8D\x05\xE8\xC1\x89\xC9f\x97\xE3\xF1z\x5B\x1Eh\x9A\xE7\x22u\x29\xDF\xBCN\xDC\x14\xC3\x8D\xB5\x12\xF3\xAFc\xFBxy\xAD";

config/secrets/dev/dev.decrypt.private.php

@@ -0,0 +1,4 @@
+<?php // dev.decrypt.private on Thu, 13 Mar 2025 20:11:36 +0000
+
+// SYMFONY_DECRYPTION_SECRET=fnNDES+LQ6IxMFuIw7u5QqqZJLKXdAt5yssDGUGUtgb0VQirIhdET3MVCC9bFDtfocoXorP8I/sxNz4WPNC2Jw==
+return "~sC\x11\x2F\x8BC\xA210\x5B\x88\xC3\xBB\xB9B\xAA\x99\x24\xB2\x97t\x0By\xCA\xCB\x03\x19A\x94\xB6\x06\xF4U\x08\xAB\x22\x17DOs\x15\x08\x2F\x5B\x14\x3B_\xA1\xCA\x17\xA2\xB3\xFC\x23\xFB17\x3E\x16\x3C\xD0\xB6\x27";

config/secrets/dev/dev.encrypt.public.php

@@ -0,0 +1,3 @@
+<?php // dev.encrypt.public on Thu, 13 Mar 2025 20:11:36 +0000
+
+return "\xF4U\x08\xAB\x22\x17DOs\x15\x08\x2F\x5B\x14\x3B_\xA1\xCA\x17\xA2\xB3\xFC\x23\xFB17\x3E\x16\x3C\xD0\xB6\x27";

config/secrets/dev/dev.list.php

@@ -0,0 +1,6 @@
+<?php
+
+return [
+    'ABSENCE_API_ID' => null,
+    'ABSENCE_API_KEY' => null,
+];

config/services.yaml

@@ -0,0 +1,16 @@
+services:
+    _defaults:
+        autowire: true
+        autoconfigure: true
+        public: false
+
+    App\:
+        resource: '../src/'
+        exclude:
+            - '../src/DependencyInjection/'
+            - '../src/Entity/'
+            - '../src/Kernel.php'
+
+    App\Controller\CalendarController:
+        arguments:
+            $requiredApiKey: '%env(REQUIRED_API_KEY)%' 

public/index.php

@@ -1,146 +1,9 @@
-<html lang="de">
-<head>
-    <meta charset="UTF-8">
-    <title>Arbeitstage FTK - Tim Lappe</title>
-    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-EVSTQN3/azprG1Anm3QDgpJLIm9Nao0Yz1ztcQTwFspd3yD65VohhpuuCOmLASjC" crossorigin="anonymous">
-    <meta name="viewport" content="width=device-width, initial-scale=1">
-    <style>
-        .type-urlaub {
-            background-color: rgb(166, 199, 203);
-        }
-        .type-ftk {
-            background-color: rgb(0, 124, 0);
-            color: white;
-            box-shadow: 0 2px 5px 0 rgba(0, 0, 0, 0.5);
-            z-index: 10;
-            position: relative;
-        }
-    </style>
-</head>
-<body>
 <?php
 
-if (!isset($_GET['key']) || $_GET['key'] !== "74857389798572903480209489024") {
+use App\Kernel;
-    echo "Kein Zugriff";
-    return;
-}
 
-ini_set('display_errors', 1);
+require_once dirname(__DIR__).'/vendor/autoload_runtime.php';
 
-use App\App;
+return function (array $context) {
-
+    return new Kernel($context['APP_ENV'], (bool) $context['APP_DEBUG']);
-require_once __DIR__ . '/../vendor/autoload.php';
+};
-
-Locale::setDefault('de_DE');
-setlocale(LC_ALL, "de_DE"); //only necessary if the locale isn't already set
-
-$formatter = new IntlDateFormatter(
-    'de_DE',
-    IntlDateFormatter::FULL,
-    IntlDateFormatter::FULL,
-    'Europe/Berlin',
-    IntlDateFormatter::GREGORIAN,
-    'EEEE'
-);
-
-$app = new App();
-$app->init();
-
-$data = ($app->getAbsenceClient())->getAbsences([
-    'skip' => 0,
-    'limit' => 50,
-    'filter' => [
-        'start' => ['$gte' => (new DateTime('-1 day'))->format('Y-m-d\TH:i:s.u\Z')],
-        'assignedTo:user._id' => [
-            'email' => 'tim.lappe@check24.de'
-        ]
-    ],
-    'sortBy' => [
-        'start' => 1
-    ],
-    'relations' => ['assignedToId', 'reasonId', 'approverId']
-]);
-
-$data = $data['data'];
-
-// Funktion zum Erstellen einer Liste aller Tage in einem bestimmten Zeitraum
-function getAllDays($startDate, $endDate) {
-    $period = new DatePeriod(
-        new DateTime($startDate),
-        new DateInterval('P1D'),
-        (new DateTime($endDate))->modify('+1 day')
-    );
-
-    $days = [];
-    foreach ($period as $date) {
-        $days[] = $date->format('Y-m-d');
-    }
-    return $days;
-}
-
-// Beispiel: Zeitraum eines Monats (kann angepasst werden)
-$startDate = (new DateTime())->format('Y-m-d');
-$endDate = (new DateTime('+90 days'))->format('Y-m-d');
-$allDays = getAllDays($startDate, $endDate);
-
-?>
-
-<div class="container mt-5">
-    <h1>Arbeitstage FTK - Tim Lappe</h1>
-    <p>Zeitraum: <?= $startDate; ?> - <?= $endDate; ?></p>
-    <table class="table table-borderless" style="table-layout: fixed">
-        <thead>
-        <tr>
-            <th style="width: 100px">Datum</th>
-            <th>Wochentag</th>
-            <th>Typ</th>
-        </tr>
-        </thead>
-        <tbody>
-        <?php foreach ($allDays as $day): ?>
-            <?php
-            $reason = '';
-            $isFtk = false;
-            $isUrlaub = false;
-            $class = 'bg-light text-dark';
-
-            // Prüfen, ob es für diesen Tag eine Abwesenheit gibt
-            foreach ($data as $absence) {
-                foreach ($absence['days'] as $absenceDay) {
-                    if ((new DateTime($absenceDay['date']))->format('Y-m-d') === $day) {
-                        $reason = $absence['reason']['name'];
-                        $isFtk = str_contains($reason, 'mobile Arbeit');
-                        $isUrlaub = str_contains($reason, 'Urlaub') || str_contains($reason, 'Sonderurlaub');
-                        $class = $isFtk ? 'type-ftk' : '';
-                        $class = $isUrlaub ? 'type-urlaub' : $class;
-                        break 2;
-                    }
-                }
-            }
-            ?>
-            <?php if (DateTimeImmutable::createFromFormat('Y-m-d', $day)->format('N') == 6): ?>
-                <tr>
-                    <td></td>
-                    <td></td>
-                </tr>
-                <?php continue; ?>
-            <?php endif; ?>
-            <?php if (DateTimeImmutable::createFromFormat('Y-m-d', $day)->format('N') == 7): ?>
-                <tr class="bg-white text-secondary">
-                    <td colspan="2">KW <?php echo ((int) (new DateTime($day))->format('W')) + 1; ?></td>
-                </tr>
-                <?php continue; ?>
-            <?php endif; ?>
-            <tr class="<?= $class ?>">
-                <td><?= (new DateTime($day))->format('d.m.Y'); ?></td>
-                <td><?= $formatter->format((new DateTime($day))) ?></td>
-                <td><?php if ($isFtk): ?>FTK<?php endif; ?> <?php if($isUrlaub): ?>Urlaub<?php endif; ?></td>
-            </tr>
-
-        <?php endforeach; ?>
-        </tbody>
-    </table>
-</div>
-
-</body>
-</html>

src/AbsenceClient.php

@@ -1,70 +0,0 @@
-<?php
-
-namespace App;
-
-use Dflydev\Hawk\Client\ClientBuilder;
-use Dflydev\Hawk\Credentials\Credentials;
-use GuzzleHttp\Client as Guzzle;
-use GuzzleHttp\Exception\GuzzleException;
-use GuzzleHttp\Psr7\Request;
-use Psr\Cache\InvalidArgumentException;
-use Symfony\Component\Cache\Adapter\FilesystemAdapter;
-
-class AbsenceClient
-{
-    private Guzzle $client;
-
-    private FilesystemAdapter $cache;
-
-    public function __construct(private string $key, private string $id)
-    {
-        $this->client = new Guzzle();
-        $this->cache = new FilesystemAdapter(defaultLifetime: 3600, directory: __DIR__ . '/../var/cache');
-    }
-
-    private function getRequest(string $method, string $path, array $data): Request
-    {
-        $credentials = new Credentials($this->key, 'sha256', $this->id);
-        $client = ClientBuilder::create()->build();
-        $request = $client->createRequest(
-            $credentials,
-            $path,
-            $method,
-            ['content-type' => 'application/json']
-        );
-
-        return new Request($method, $path, [
-            'Authorization' => $request->header()->fieldValue(),
-            'Content-Type' => 'application/json',
-        ], json_encode($data));
-    }
-
-    /**
-     * @throws InvalidArgumentException
-     */
-    public function getAbsences(array $filter): array
-    {
-        $request = $this->cache->get("get_absences", function ($item) use ($filter) {
-            echo "Cache miss\n";
-            $item->expiresAfter(3600);
-
-            $request = $this->getRequest('POST', 'https://app.absence.io/api/v2/absences', $filter);
-            try {
-                $res = $this->client->send($request);
-            } catch (GuzzleException $e) {
-                return [];
-            }
-
-            return json_decode($res->getBody()->getContents(), true);
-        });
-
-        $this->cache->commit();
-
-        return $request;
-    }
-
-    public function getClient(): Guzzle
-    {
-        return $this->client;
-    }
-}

src/App.php

@@ -1,24 +0,0 @@
-<?php
-
-namespace App;
-
-use Symfony\Component\Dotenv\Dotenv;
-
-class App
-{
-    private AbsenceClient $absenceClient;
-
-    public function init(): void
-    {
-        $dotenv = new Dotenv();
-        $dotenv->load(__DIR__ . '/../.env');
-        $dotenv->overload(__DIR__ . '/../.env.local');
-
-        $this->absenceClient = new AbsenceClient($_ENV['ABSENCE_KEY'], $_ENV['ABSENCE_ID']);
-    }
-
-    public function getAbsenceClient(): AbsenceClient
-    {
-        return $this->absenceClient;
-    }
-}

src/Controller/CalendarController.php

@@ -0,0 +1,43 @@
+<?php
+
+namespace App\Controller;
+
+use App\Service\AbsenceManager;
+use App\Service\CalendarService;
+use DateTime;
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\Routing\Attribute\Route;
+
+final class CalendarController extends AbstractController
+{
+    public function __construct(
+        private readonly AbsenceManager $absenceManager,
+        private readonly CalendarService $calendarService,
+        private readonly string $requiredApiKey
+    ) {
+    }
+
+    #[Route('/', name: 'calendar_index')]
+    public function index(Request $request): Response
+    {
+        if (!$request->query->has('key') || $request->query->get('key') !== $this->requiredApiKey) {
+            return new Response('Kein Zugriff', Response::HTTP_FORBIDDEN);
+        }
+
+        $startDate = (new DateTime())->format('Y-m-d');
+        $endDate = (new DateTime('+90 days'))->format('Y-m-d');
+
+        $absences = $this->absenceManager->getAbsencesForUser('tim.lappe@check24.de', new DateTime('-1 day'));
+
+        $days = $this->calendarService->getAllDays($startDate, $endDate);
+        $days = $this->calendarService->processAbsences($days, $absences);
+
+        return $this->render('calendar/index.html.twig', [
+            'startDate' => new DateTime($startDate),
+            'endDate' => new DateTime($endDate),
+            'days' => $days,
+        ]);
+    }
+} 

src/Kernel.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace App;
+
+use Symfony\Bundle\FrameworkBundle\Kernel\MicroKernelTrait;
+use Symfony\Component\HttpKernel\Kernel as BaseKernel;
+
+class Kernel extends BaseKernel
+{
+    use MicroKernelTrait;
+} 

src/Model/Absence.php

@@ -0,0 +1,107 @@
+<?php
+
+namespace App\Model;
+
+use DateTime;
+
+final class Absence
+{
+    private array $days = [];
+    private ?string $reasonName = null;
+    
+    public function __construct(
+        private readonly string $id,
+        private readonly DateTime $startDate,
+        private readonly DateTime $endDate,
+        private readonly string $userId,
+        private readonly string $userEmail,
+        private readonly array $reason = []
+    ) {
+        if (isset($reason['name'])) {
+            $this->reasonName = $reason['name'];
+        }
+    }
+    
+    public function getId(): string
+    {
+        return $this->id;
+    }
+    
+    public function getStartDate(): DateTime
+    {
+        return $this->startDate;
+    }
+    
+    public function getEndDate(): DateTime
+    {
+        return $this->endDate;
+    }
+    
+    public function getUserId(): string
+    {
+        return $this->userId;
+    }
+    
+    public function getUserEmail(): string
+    {
+        return $this->userEmail;
+    }
+    
+    public function getReason(): array
+    {
+        return $this->reason;
+    }
+    
+    public function getReasonName(): ?string
+    {
+        return $this->reasonName;
+    }
+    
+    public function setDays(array $days): self
+    {
+        $this->days = $days;
+        return $this;
+    }
+    
+    public function getDays(): array
+    {
+        return $this->days;
+    }
+    
+    public function isWorkFromHome(): bool
+    {
+        if ($this->reasonName === null) {
+            return false;
+        }
+        
+        return str_contains($this->reasonName, 'mobile Arbeit');
+    }
+    
+    public function isVacation(): bool
+    {
+        if ($this->reasonName === null) {
+            return false;
+        }
+        
+        return str_contains($this->reasonName, 'Urlaub') || 
+               str_contains($this->reasonName, 'Sonderurlaub');
+    }
+    
+    public static function fromArray(array $data): self
+    {
+        $absence = new self(
+            $data['_id'] ?? '',
+            isset($data['start']) ? new DateTime($data['start']) : new DateTime(),
+            isset($data['end']) ? new DateTime($data['end']) : new DateTime(),
+            $data['assignedTo']['user']['_id'] ?? '',
+            $data['assignedTo']['user']['email'] ?? '',
+            $data['reason'] ?? []
+        );
+        
+        if (isset($data['days'])) {
+            $absence->setDays($data['days']);
+        }
+        
+        return $absence;
+    }
+} 

src/Service/AbsenceClient.php

@@ -0,0 +1,85 @@
+<?php
+
+namespace App\Service;
+
+use Dflydev\Hawk\Client\ClientBuilder;
+use Dflydev\Hawk\Credentials\Credentials;
+use Symfony\Contracts\HttpClient\HttpClientInterface;
+use Symfony\Component\DependencyInjection\Attribute\Autowire;
+use Symfony\Contracts\HttpClient\Exception\TransportExceptionInterface;
+use Symfony\Contracts\HttpClient\ResponseInterface;
+use Symfony\Contracts\Cache\CacheInterface;
+use Symfony\Contracts\Cache\ItemInterface;
+
+final class AbsenceClient
+{
+    private const BASE_URL = 'https://app.absence.io/api/v2';
+
+    public function __construct(
+        private readonly HttpClientInterface $client,
+        private readonly CacheInterface $cache,
+
+        #[Autowire('%env(ABSENCE_API_KEY)%')]
+        private readonly string $key,
+
+        #[Autowire('%env(ABSENCE_API_ID)%')]
+        private readonly string $id
+    ) {
+    }
+
+    public function getAbsences(array $params): array
+    {
+        try {
+            $response = $this->sendRequest(
+                'POST',
+                self::BASE_URL . '/absences',
+                $params
+            );
+            
+            return $response->toArray();
+        } catch (TransportExceptionInterface $e) {
+            return ['data' => []];
+        }
+    }
+
+    public function getReasons(array $params): array
+    {
+        $cacheKey = 'reasons_' . md5(serialize($params));
+
+        return $this->cache->get($cacheKey, function (ItemInterface $item) use ($params) {
+            $item->expiresAfter(3600);
+            
+            try {
+                $response = $this->sendRequest(
+                    'POST',
+                    self::BASE_URL . '/reasons',
+                    $params
+                );
+                
+                return $response->toArray();
+            } catch (TransportExceptionInterface $e) {
+                return ['data' => []];
+            }
+        });
+    }
+
+    private function sendRequest(string $method, string $url, ?array $body = null): ResponseInterface
+    {
+        $credentials = new Credentials($this->key, 'sha256', $this->id);
+        $client = ClientBuilder::create()->build();
+        $request = $client->createRequest(
+            $credentials,
+            $url,
+            $method,
+            ['content-type' => 'application/json']
+        );
+
+        return $this->client->request($method, $url, [
+            'headers' => [
+                'Authorization' => $request->header()->fieldValue(),
+                'Content-Type' => 'application/json'
+            ],
+            'json' => $body
+        ]);
+    }
+}

src/Service/AbsenceManager.php

@@ -0,0 +1,51 @@
+<?php
+
+namespace App\Service;
+
+use App\Model\Absence;
+use DateTime;
+use Symfony\Contracts\Cache\CacheInterface;
+use Symfony\Contracts\Cache\ItemInterface;
+
+final class AbsenceManager
+{
+    public function __construct(
+        private readonly AbsenceClient $absenceClient,
+        private readonly CacheInterface $cache
+    ) {
+    }
+
+    public function getAbsencesForUser(string $email, ?DateTime $startDate = null): array
+    {   
+        $startDate ??= new DateTime('-1 day');
+        $cacheKey = base64_encode(sprintf('absences_%s_%s', $email, $startDate->format('Y-m-d')));
+        
+        return $this->cache->get($cacheKey, function (ItemInterface $item) use ($email, $startDate) {
+            $item->expiresAfter(3600);
+            
+            $response = $this->absenceClient->getAbsences([
+                'skip' => 0,
+                'limit' => 50,
+                'filter' => [
+                    'start' => ['$gte' => $startDate->format('Y-m-d\TH:i:s.u\Z')],
+                    'assignedTo:user._id' => [
+                        'email' => $email
+                    ]
+                ],
+                'sortBy' => [
+                    'start' => 1
+                ],
+                'relations' => ['reasonId']
+            ]);
+            
+            if (!isset($response['data']) || !is_array($response['data'])) {
+                return [];
+            }
+            
+            return array_map(
+                fn (array $absenceData): Absence => Absence::fromArray($absenceData),
+                $response['data']
+            );
+        });
+    }
+}

src/Service/CalendarService.php

@@ -0,0 +1,102 @@
+<?php
+
+namespace App\Service;
+
+use App\Model\Absence;
+use DateTime;
+use DateTimeImmutable;
+use DatePeriod;
+use DateInterval;
+use IntlDateFormatter;
+
+final class CalendarService
+{
+    private IntlDateFormatter $formatter;
+
+    public function __construct()
+    {
+        $this->formatter = new IntlDateFormatter(
+            'de_DE',
+            IntlDateFormatter::FULL,
+            IntlDateFormatter::FULL,
+            'Europe/Berlin',
+            IntlDateFormatter::GREGORIAN,
+            'EEEE'
+        );
+    }
+
+    public function getAllDays(string $startDate, string $endDate): array
+    {
+        $period = new DatePeriod(
+            new DateTime($startDate),
+            new DateInterval('P1D'),
+            (new DateTime($endDate))->modify('+1 day')
+        );
+
+        $days = [];
+        foreach ($period as $date) {
+            $dateObj = DateTimeImmutable::createFromInterface($date);
+            $days[] = [
+                'date' => $date,
+                'weekday' => (int) $dateObj->format('N'),
+                'weekdayName' => $this->formatter->format($date),
+                'weekNumber' => (int) $dateObj->format('W'),
+                'class' => 'bg-light text-dark',
+                'isFtk' => false,
+                'isUrlaub' => false
+            ];
+        }
+
+        return $days;
+    }
+
+    /**
+     * @param array $days
+     * @param Absence[] $absences
+     * @return array
+     */
+    public function processAbsences(array &$days, array $absences): array
+    {
+        if (empty($absences)) {
+            return $days;
+        }
+        
+        foreach ($days as &$day) {
+            foreach ($absences as $absence) {
+                $isAbsenceForDay = $this->processAbsenceForDay($day, $absence);
+                if ($isAbsenceForDay) {
+                    break;
+                }
+            }
+        }
+
+        return $days;
+    }
+    
+    private function processAbsenceForDay(array &$day, Absence $absence): bool
+    {
+        foreach ($absence->getDays() as $absenceDay) {
+            if (!isset($absenceDay['date']) || !$this->isSameDay($day['date'], new DateTime($absenceDay['date']))) {
+                continue;
+            }
+            
+            $day['isFtk'] = $absence->isWorkFromHome();
+            $day['isUrlaub'] = $absence->isVacation();
+            
+            if ($day['isFtk']) {
+                $day['class'] = 'type-ftk';
+            } elseif ($day['isUrlaub']) {
+                $day['class'] = 'type-urlaub';
+            }
+            
+            return true;
+        }
+        
+        return false;
+    }
+
+    private function isSameDay(DateTime $date1, DateTime $date2): bool
+    {
+        return $date1->format('Y-m-d') === $date2->format('Y-m-d');
+    }
+}

symfony.lock

@@ -0,0 +1,85 @@
+{
+    "symfony/console": {
+        "version": "7.2",
+        "recipe": {
+            "repo": "github.com/symfony/recipes",
+            "branch": "main",
+            "version": "5.3",
+            "ref": "1781ff40d8a17d87cf53f8d4cf0c8346ed2bb461"
+        },
+        "files": [
+            "bin/console"
+        ]
+    },
+    "symfony/flex": {
+        "version": "2.5",
+        "recipe": {
+            "repo": "github.com/symfony/recipes",
+            "branch": "main",
+            "version": "2.4",
+            "ref": "52e9754527a15e2b79d9a610f98185a1fe46622a"
+        },
+        "files": [
+            ".env",
+            ".env.dev"
+        ]
+    },
+    "symfony/framework-bundle": {
+        "version": "7.2",
+        "recipe": {
+            "repo": "github.com/symfony/recipes",
+            "branch": "main",
+            "version": "7.2",
+            "ref": "87bcf6f7c55201f345d8895deda46d2adbdbaa89"
+        },
+        "files": [
+            "config/packages/cache.yaml",
+            "config/packages/framework.yaml",
+            "config/preload.php",
+            "config/routes/framework.yaml",
+            "config/services.yaml",
+            "public/index.php",
+            "src/Controller/.gitignore",
+            "src/Kernel.php"
+        ]
+    },
+    "symfony/routing": {
+        "version": "7.2",
+        "recipe": {
+            "repo": "github.com/symfony/recipes",
+            "branch": "main",
+            "version": "7.0",
+            "ref": "21b72649d5622d8f7da329ffb5afb232a023619d"
+        },
+        "files": [
+            "config/packages/routing.yaml",
+            "config/routes.yaml"
+        ]
+    },
+    "symfony/twig-bundle": {
+        "version": "7.2",
+        "recipe": {
+            "repo": "github.com/symfony/recipes",
+            "branch": "main",
+            "version": "6.4",
+            "ref": "cab5fd2a13a45c266d45a7d9337e28dee6272877"
+        },
+        "files": [
+            "config/packages/twig.yaml",
+            "templates/base.html.twig"
+        ]
+    },
+    "symfony/web-profiler-bundle": {
+        "version": "7.2",
+        "recipe": {
+            "repo": "github.com/symfony/recipes",
+            "branch": "main",
+            "version": "6.1",
+            "ref": "e42b3f0177df239add25373083a564e5ead4e13a"
+        },
+        "files": [
+            "config/packages/web_profiler.yaml",
+            "config/routes/web_profiler.yaml"
+        ]
+    }
+}

templates/base.html.twig

@@ -0,0 +1,16 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <meta charset="UTF-8">
+        <title>{% block title %}Welcome!{% endblock %}</title>
+        <link rel="icon" href="data:image/svg+xml,<svg xmlns=%22http://www.w3.org/2000/svg%22 viewBox=%220 0 128 128%22><text y=%221.2em%22 font-size=%2296%22>⚫️</text><text y=%221.3em%22 x=%220.2em%22 font-size=%2276%22 fill=%22%23fff%22>sf</text></svg>">
+        {% block stylesheets %}
+        {% endblock %}
+
+        {% block javascripts %}
+        {% endblock %}
+    </head>
+    <body>
+        {% block body %}{% endblock %}
+    </body>
+</html>

templates/calendar/index.html.twig

@@ -0,0 +1,87 @@
+<!DOCTYPE html>
+<html lang="de">
+<head>
+    <meta charset="UTF-8">
+    <title>Arbeitskalender Tim Lappe</title>
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-EVSTQN3/azprG1Anm3QDgpJLIm9Nao0Yz1ztcQTwFspd3yD65VohhpuuCOmLASjC" crossorigin="anonymous">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    <style>
+        .type-urlaub {
+            background-color: rgb(166, 199, 203);
+        }
+        .type-ftk {
+            background-color: rgb(0, 124, 0);
+            color: white;
+            z-index: 10;
+            position: relative;
+        }
+        .calendar-grid {
+            display: grid;
+            grid-template-columns: repeat(7, 1fr);
+            gap: 4px;
+        }
+        .calendar-day {
+            padding: 10px;
+            border: 1px solid #dee2e6;
+            min-height: 100px;
+        }
+        .calendar-header {
+            text-align: center;
+            font-weight: bold;
+            padding: 10px;
+            background-color: #f8f9fa;
+        }
+        .calendar-week {
+            grid-column: 1 / -1;
+            background-color: #f8f9fa;
+            padding: 5px;
+            text-align: left;
+            color: #6c757d;
+        }
+    </style>
+</head>
+<body>
+    <div class="container mt-5">
+        <h3 class="fw-bold mb-3">Arbeitskalender Tim Lappe</h3>
+        <div class="calendar-grid">
+            <div class="calendar-header">Mo</div>
+            <div class="calendar-header">Di</div>
+            <div class="calendar-header">Mi</div>
+            <div class="calendar-header">Do</div>
+            <div class="calendar-header">Fr</div>
+            <div class="calendar-header">Sa</div>
+            <div class="calendar-header">So</div>
+
+            {% set currentMonth = null %}
+            {% set firstDay = days|first %}
+            {% if firstDay.weekday > 1 %}
+                {% if currentMonth != firstDay.date|date('F') %}
+                    {% set currentMonth = firstDay.date|date('F') %}
+                    <div class="calendar-week" style="background-color: #e9ecef;">{{ firstDay.date|date('F Y') }}</div>
+                {% endif %}
+                {% for i in 1..firstDay.weekday - 1 %}
+                    <div class="calendar-day"></div>
+                {% endfor %}
+            {% endif %}
+
+            {% for day in days %}
+                {% if currentMonth != day.date|date('F') %}
+                    {% set currentMonth = day.date|date('F') %}
+                    <div class="calendar-week" style="background-color: #e9ecef;">{{ day.date|date('F Y') }}</div>
+                {% endif %}
+                <div class="calendar-day {{ day.class }}">
+                    <div>{{ day.date|date('d.m.Y') }}</div>
+                    {% if day.isFtk %}<div>FTK</div>{% endif %}
+                    {% if day.isUrlaub %}<div>Urlaub</div>{% endif %}
+                </div>
+            {% endfor %}
+            
+            {% if days|last.weekday < 7 %}
+                {% for i in days|last.weekday + 1..7 %}
+                    <div class="calendar-day"></div>
+                {% endfor %}
+            {% endif %}
+        </div>
+    </div>
+</body>
+</html>