vibe

.env

@@ -18,3 +18,13 @@
 APP_ENV=dev
 APP_SECRET=
 ###< symfony/framework-bundle ###
+
+###> doctrine/doctrine-bundle ###
+# Format described at https://www.doctrine-project.org/projects/doctrine-dbal/en/latest/reference/configuration.html#connecting-using-a-url
+# IMPORTANT: You MUST configure your server version, either here or in config/packages/doctrine.yaml
+#
+DATABASE_URL="sqlite:///%kernel.project_dir%/var/data_%kernel.environment%.db"
+# DATABASE_URL="mysql://app:!ChangeMe!@127.0.0.1:3306/app?serverVersion=8.0.32&charset=utf8mb4"
+# DATABASE_URL="mysql://app:!ChangeMe!@127.0.0.1:3306/app?serverVersion=10.11.2-MariaDB&charset=utf8mb4"
+# DATABASE_URL="postgresql://app:!ChangeMe!@127.0.0.1:5432/app?serverVersion=16&charset=utf8"
+###< doctrine/doctrine-bundle ###

.gitignore

@@ -8,3 +8,9 @@
 /var/
 /vendor/
 ###< symfony/framework-bundle ###
+
+###> phpstan/phpstan ###
+phpstan.neon
+###< phpstan/phpstan ###
+
+.idea

composer.json

@@ -4,17 +4,31 @@
     "minimum-stability": "stable",
     "prefer-stable": true,
     "require": {
-        "php": ">=8.2",
+        "php": ">=8.4",
         "ext-ctype": "*",
         "ext-iconv": "*",
+        "doctrine/dbal": "^3",
+        "doctrine/doctrine-bundle": "^2.14",
+        "doctrine/doctrine-migrations-bundle": "^3.4",
+        "doctrine/orm": "^3.3",
         "symfony/console": "7.3.*",
         "symfony/dotenv": "7.3.*",
         "symfony/flex": "^2",
+        "symfony/form": "7.3.*",
         "symfony/framework-bundle": "7.3.*",
         "symfony/runtime": "7.3.*",
+        "symfony/security-csrf": "7.3.*",
+        "symfony/twig-bundle": "7.3.*",
+        "symfony/validator": "7.3.*",
         "symfony/yaml": "7.3.*"
     },
     "require-dev": {
+        "rector/rector": "^2.0",
+        "symfony/maker-bundle": "^1.63",
+        "symfony/stopwatch": "7.3.*",
+        "symfony/web-profiler-bundle": "7.3.*",
+        "symplify/config-transformer": "^12.4",
+        "symplify/easy-coding-standard": "^12.5"
     },
     "config": {
         "allow-plugins": {
@@ -55,6 +69,10 @@
         ],
         "post-update-cmd": [
             "@auto-scripts"
+        ],
+        "lint": [
+            "rector",
+            "ecs --fix || ecs --fix"
         ]
     },
     "conflict": {

config/bundles.php

@@ -2,4 +2,9 @@
 
 return [
     Symfony\Bundle\FrameworkBundle\FrameworkBundle::class => ['all' => true],
+    Symfony\Bundle\TwigBundle\TwigBundle::class => ['all' => true],
+    Doctrine\Bundle\DoctrineBundle\DoctrineBundle::class => ['all' => true],
+    Doctrine\Bundle\MigrationsBundle\DoctrineMigrationsBundle::class => ['all' => true],
+    Symfony\Bundle\MakerBundle\MakerBundle::class => ['dev' => true],
+    Symfony\Bundle\WebProfilerBundle\WebProfilerBundle::class => ['dev' => true, 'test' => true],
 ];

config/packages/cache.php

@@ -0,0 +1,11 @@
+<?php
+
+declare(strict_types=1);
+
+use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;
+
+return static function (ContainerConfigurator $containerConfigurator): void {
+    $containerConfigurator->extension('framework', [
+        'cache' => null,
+    ]);
+};

config/packages/cache.yaml

@@ -1,19 +0,0 @@
-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/csrf.php

@@ -0,0 +1,22 @@
+<?php
+
+declare(strict_types=1);
+
+use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;
+
+return static function (ContainerConfigurator $containerConfigurator): void {
+    $containerConfigurator->extension('framework', [
+        'form' => [
+            'csrf_protection' => [
+                'token_id' => 'submit',
+            ],
+        ],
+        'csrf_protection' => [
+            'stateless_token_ids' => [
+                'submit',
+                'authenticate',
+                'logout',
+            ],
+        ],
+    ]);
+};

config/packages/doctrine.php

@@ -0,0 +1,74 @@
+<?php
+
+declare(strict_types=1);
+
+use Doctrine\DBAL\Platforms\PostgreSQLPlatform;
+use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;
+
+return static function (ContainerConfigurator $containerConfigurator): void {
+    $containerConfigurator->extension('doctrine', [
+        'dbal' => [
+            'url' => '%env(resolve:DATABASE_URL)%',
+            'profiling_collect_backtrace' => '%kernel.debug%',
+            'use_savepoints' => true,
+        ],
+        'orm' => [
+            'auto_generate_proxy_classes' => true,
+            'enable_lazy_ghost_objects' => true,
+            'report_fields_where_declared' => true,
+            'validate_xml_mapping' => true,
+            'naming_strategy' => 'doctrine.orm.naming_strategy.underscore_number_aware',
+            'identity_generation_preferences' => [
+                PostgreSQLPlatform::class => 'identity',
+            ],
+            'auto_mapping' => true,
+            'mappings' => [
+                'App' => [
+                    'type' => 'attribute',
+                    'is_bundle' => false,
+                    'dir' => '%kernel.project_dir%/src/Entity',
+                    'prefix' => 'App\Entity',
+                    'alias' => 'App',
+                ],
+            ],
+            'controller_resolver' => [
+                'auto_mapping' => false,
+            ],
+        ],
+    ]);
+    if ($containerConfigurator->env() === 'test') {
+        $containerConfigurator->extension('doctrine', [
+            'dbal' => [
+                'dbname_suffix' => '_test%env(default::TEST_TOKEN)%',
+            ],
+        ]);
+    }
+    if ($containerConfigurator->env() === 'prod') {
+        $containerConfigurator->extension('doctrine', [
+            'orm' => [
+                'auto_generate_proxy_classes' => false,
+                'proxy_dir' => '%kernel.build_dir%/doctrine/orm/Proxies',
+                'query_cache_driver' => [
+                    'type' => 'pool',
+                    'pool' => 'doctrine.system_cache_pool',
+                ],
+                'result_cache_driver' => [
+                    'type' => 'pool',
+                    'pool' => 'doctrine.result_cache_pool',
+                ],
+            ],
+        ]);
+        $containerConfigurator->extension('framework', [
+            'cache' => [
+                'pools' => [
+                    'doctrine.result_cache_pool' => [
+                        'adapter' => 'cache.app',
+                    ],
+                    'doctrine.system_cache_pool' => [
+                        'adapter' => 'cache.system',
+                    ],
+                ],
+            ],
+        ]);
+    }
+};

config/packages/doctrine_migrations.php

@@ -0,0 +1,14 @@
+<?php
+
+declare(strict_types=1);
+
+use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;
+
+return static function (ContainerConfigurator $containerConfigurator): void {
+    $containerConfigurator->extension('doctrine_migrations', [
+        'migrations_paths' => [
+            'DoctrineMigrations' => '%kernel.project_dir%/migrations',
+        ],
+        'enable_profiler' => false,
+    ]);
+};

config/packages/framework.php

@@ -0,0 +1,20 @@
+<?php
+
+declare(strict_types=1);
+
+use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;
+
+return static function (ContainerConfigurator $containerConfigurator): void {
+    $containerConfigurator->extension('framework', [
+        'secret' => '%env(APP_SECRET)%',
+        'session' => true,
+    ]);
+    if ($containerConfigurator->env() === 'test') {
+        $containerConfigurator->extension('framework', [
+            'test' => true,
+            'session' => [
+                'storage_factory_id' => 'session.storage.factory.mock_file',
+            ],
+        ]);
+    }
+};

config/packages/framework.yaml

@@ -1,15 +0,0 @@
-# see https://symfony.com/doc/current/reference/configuration/framework.html
-framework:
-    secret: '%env(APP_SECRET)%'
-
-    # Note that the session will be started ONLY if you read or write from it.
-    session: true
-
-    #esi: true
-    #fragments: true
-
-when@test:
-    framework:
-        test: true
-        session:
-            storage_factory_id: session.storage.factory.mock_file

config/packages/property_info.php

@@ -0,0 +1,13 @@
+<?php
+
+declare(strict_types=1);
+
+use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;
+
+return static function (ContainerConfigurator $containerConfigurator): void {
+    $containerConfigurator->extension('framework', [
+        'property_info' => [
+            'with_constructor_extractor' => true,
+        ],
+    ]);
+};

config/packages/routing.php

@@ -0,0 +1,18 @@
+<?php
+
+declare(strict_types=1);
+
+use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;
+
+return static function (ContainerConfigurator $containerConfigurator): void {
+    $containerConfigurator->extension('framework', [
+        'router' => null,
+    ]);
+    if ($containerConfigurator->env() === 'prod') {
+        $containerConfigurator->extension('framework', [
+            'router' => [
+                'strict_requirements' => null,
+            ],
+        ]);
+    }
+};

config/packages/routing.yaml

@@ -1,10 +0,0 @@
-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.php

@@ -0,0 +1,16 @@
+<?php
+
+declare(strict_types=1);
+
+use App\Service\Config\AppName;
+use Symfony\Config\TwigConfig;
+use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;
+
+return static function (ContainerConfigurator $containerConfigurator, TwigConfig $twig): void {
+    $twig->fileNamePattern('*.twig');
+    $twig->formThemes(['bootstrap_5_layout.html.twig']);
+    $twig->global('appName', \Symfony\Component\DependencyInjection\Loader\Configurator\service(AppName::class));
+    if ($containerConfigurator->env() === 'test') {
+        $twig->strictVariables(true);
+    }
+};

config/packages/validator.php

@@ -0,0 +1,18 @@
+<?php
+
+declare(strict_types=1);
+
+use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;
+
+return static function (ContainerConfigurator $containerConfigurator): void {
+    $containerConfigurator->extension('framework', [
+        'validation' => null,
+    ]);
+    if ($containerConfigurator->env() === 'test') {
+        $containerConfigurator->extension('framework', [
+            'validation' => [
+                'not_compromised_password' => false,
+            ],
+        ]);
+    }
+};

config/packages/web_profiler.php

@@ -0,0 +1,25 @@
+<?php
+
+declare(strict_types=1);
+
+use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;
+
+return static function (ContainerConfigurator $containerConfigurator): void {
+    if ($containerConfigurator->env() === 'dev') {
+        $containerConfigurator->extension('web_profiler', [
+            'toolbar' => true,
+        ]);
+        $containerConfigurator->extension('framework', [
+            'profiler' => [
+                'collect_serializer_data' => true,
+            ],
+        ]);
+    }
+    if ($containerConfigurator->env() === 'test') {
+        $containerConfigurator->extension('framework', [
+            'profiler' => [
+                'collect' => false,
+            ],
+        ]);
+    }
+};

config/preload.php

@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 if (file_exists(dirname(__DIR__) . '/var/cache/prod/App_KernelProdContainer.preload.php')) {
     require dirname(__DIR__) . '/var/cache/prod/App_KernelProdContainer.preload.php';
 }

config/routes.php

@@ -0,0 +1,12 @@
+<?php
+
+declare(strict_types=1);
+
+use Symfony\Component\Routing\Loader\Configurator\RoutingConfigurator;
+
+return static function (RoutingConfigurator $routingConfigurator): void {
+    $routingConfigurator->import([
+        'path' => '../src/Controller/',
+        'namespace' => 'App\Controller',
+    ], 'attribute');
+};

config/routes.yaml

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

config/routes/framework.php

@@ -0,0 +1,12 @@
+<?php
+
+declare(strict_types=1);
+
+use Symfony\Component\Routing\Loader\Configurator\RoutingConfigurator;
+
+return static function (RoutingConfigurator $routingConfigurator): void {
+    if ($routingConfigurator->env() === 'dev') {
+        $routingConfigurator->import('@FrameworkBundle/Resources/config/routing/errors.php')
+        ->prefix('/_error');
+    }
+};

config/routes/framework.yaml

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

config/routes/web_profiler.php

@@ -0,0 +1,14 @@
+<?php
+
+declare(strict_types=1);
+
+use Symfony\Component\Routing\Loader\Configurator\RoutingConfigurator;
+
+return static function (RoutingConfigurator $routingConfigurator): void {
+    if ($routingConfigurator->env() === 'dev') {
+        $routingConfigurator->import('@WebProfilerBundle/Resources/config/routing/wdt.php')
+        ->prefix('/_wdt');
+        $routingConfigurator->import('@WebProfilerBundle/Resources/config/routing/profiler.php')
+        ->prefix('/_profiler');
+    }
+};

config/services.php

@@ -0,0 +1,15 @@
+<?php
+
+declare(strict_types=1);
+
+use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;
+
+return static function (ContainerConfigurator $containerConfigurator): void {
+    $services = $containerConfigurator->services();
+
+    $services->defaults()
+        ->autowire()
+        ->autoconfigure();
+
+    $services->load('App\\', __DIR__ . '/../src/');
+};

config/services.yaml

@@ -1,20 +0,0 @@
-# This file is the entry point to configure your own services.
-# Files in the packages/ subdirectory configure your dependencies.
-
-# Put parameters here that don't need to change on each machine where the app is deployed
-# https://symfony.com/doc/current/best_practices.html#use-parameters-for-application-configuration
-parameters:
-
-services:
-    # default configuration for services in *this* file
-    _defaults:
-        autowire: true      # Automatically injects dependencies in your services.
-        autoconfigure: true # Automatically registers your services as commands, event subscribers, etc.
-
-    # makes classes in src/ available to be used as services
-    # this creates a service per class whose id is the fully-qualified class name
-    App\:
-        resource: '../src/'
-
-    # add more service definitions when explicit configuration is needed
-    # please note that last definitions always *replace* previous ones

ecs.php

@@ -0,0 +1,41 @@
+<?php
+
+declare(strict_types=1);
+
+use PhpCsFixer\Fixer\Import\NoUnusedImportsFixer;
+use Symplify\EasyCodingStandard\Config\ECSConfig;
+
+return ECSConfig::configure()
+    ->withPaths([
+        __DIR__ . '/public',
+        __DIR__ . '/src',
+        __DIR__ . '/config',
+        __DIR__ . '/tests',
+        __DIR__ . '/bin',
+    ])
+
+    ->withRootFiles()
+
+    // add a single rule
+    ->withRules([
+        NoUnusedImportsFixer::class,
+    ])
+
+
+
+    ->withPhpCsFixerSets(
+        per: true,
+        php84Migration: true,
+    )
+
+
+    // add sets - group of rules, from easiest to more complex ones
+    // uncomment one, apply one, commit, PR, merge and repeat
+    ->withPreparedSets(
+        arrays: true,
+        comments: true,
+        controlStructures: true,
+        strict: true,
+        cleanCode: true,
+    )
+;

phpstan.dist.neon

@@ -0,0 +1,8 @@
+parameters:
+    level: 6
+    paths:
+        - bin/
+        - config/
+        - public/
+        - src/
+        - tests/

podman/Containerfile

@@ -0,0 +1,13 @@
+FROM dunglas/frankenphp
+
+ARG USER=appuser
+
+RUN \
+	# Use "adduser -D ${USER}" for alpine based distros
+	useradd ${USER}; \
+	# Remove default capability
+	setcap -r /usr/local/bin/frankenphp; \
+	# Give write access to /data/caddy and /config/caddy
+	chown -R ${USER}:${USER} /data/caddy && chown -R ${USER}:${USER} /config/caddy
+
+USER ${USER}

public/assets/css/styles.css

@@ -0,0 +1,88 @@
+
+/* Emoji Footprint Animation */
+.emoji-footprint {
+    position: absolute;
+    font-size: 1.6rem;
+    pointer-events: none;
+    animation: emojiFade 1s ease-out forwards;
+    transform: translate(-50%, -50%) scale(1);
+    opacity: 1;
+    z-index: 9999;
+    text-shadow:
+            0 0 4px #ff00bf,
+            0 0 8px #ff80df,
+            0 0 12px #ffccff;
+}
+
+@keyframes emojiFade {
+    0% {
+        transform: translate(-50%, -50%) scale(1);
+        opacity: 1;
+    }
+    50% {
+        transform: translate(-50%, -50%) scale(1.5);
+        opacity: 0.7;
+    }
+    100% {
+        transform: translate(-50%, -50%) scale(2);
+        opacity: 0;
+    }
+}
+
+/* Light Mode (Default) */
+:root {
+    --bs-primary: #ff47a3;     /* Hot Pink */
+    --bs-secondary: #7367f0;   /* Lavender */
+    --bs-success: #53e69d;     /* Minty Green */
+    --bs-info: #51caff;        /* Sky Blue */
+    --bs-warning: #ffd53e;     /* Sunshine Yellow */
+    --bs-danger: #ff5666;      /* Coral Red */
+    --bs-light: #fff7fa;       /* Almost-white Pink */
+    --bs-dark: #3b233d;        /* Deep Purple */
+
+    /* Quirk it up further */
+    --bs-body-bg: #fff7fa;
+    --bs-body-color: #3b233d;
+    --bs-link-color: #ff47a3;
+    --bs-link-hover-color: #7367f0;
+    --bs-border-color: #ffb8e1;
+}
+
+/* Dark Mode (Bootstrap's preferred way) */
+@media (prefers-color-scheme: dark) {
+    :root {
+        --bs-primary: #ff9cd7;     /* Pastel Pink */
+        --bs-secondary: #b39afd;   /* Light Lavender */
+        --bs-success: #8fffd9;     /* Lighter Mint */
+        --bs-info: #90e7ff;        /* Pastel Sky Blue */
+        --bs-warning: #fff4b1;     /* Pale Yellow */
+        --bs-danger: #ffb1b8;      /* Soft Coral */
+        --bs-light: #2a102d;       /* Deep Purple-Black */
+        --bs-dark: #fff7fa;        /* Reverse for dark backgrounds */
+
+        --bs-body-bg: #2a102d;
+        --bs-body-color: #fff7fa;
+        --bs-link-color: #ff9cd7;
+        --bs-link-hover-color: #b39afd;
+        --bs-border-color: #6e3a6e;
+    }
+}
+
+/* Top Navigation Bar Styles */
+main {
+    margin-top: 20px;
+}
+
+.navbar-brand {
+    font-weight: bold;
+}
+
+.navbar-text {
+    font-size: 0.9rem;
+}
+
+@media (max-width: 992px) {
+    .navbar-text {
+        display: none;
+    }
+}

public/assets/js/app.js

@@ -0,0 +1,797 @@
+// Sparkle effect on mouse move
+document.addEventListener('mousemove', function (e) {
+    const emojis = ['✨', '💖', '🌟', '💅', '🦄', '🎉', '🌈'];
+    const sparkle = document.createElement('div');
+    sparkle.className = 'emoji-footprint';
+    sparkle.textContent = emojis[Math.floor(Math.random() * emojis.length)];
+    sparkle.style.left = e.pageX + 'px';
+    sparkle.style.top = e.pageY + 'px';
+    document.body.appendChild(sparkle);
+
+    setTimeout(() => {
+        sparkle.remove();
+    }, 1000);
+});
+
+// Dashboard, Order Management, Inventory Management, Settings, and Drink Type functionality
+document.addEventListener('DOMContentLoaded', function() {
+    // Stock update form handling
+    initStockUpdateForms();
+
+    // Edit button handling
+    initEditButtons();
+
+    // Order form handling
+    initOrderForms();
+
+    // Order status form handling
+    initOrderStatusForms();
+
+    // Inventory form handling
+    initInventoryForm();
+
+    // Settings form handling
+    initSettingsForm();
+
+    // Drink Type form handling
+    initDrinkTypeForm();
+});
+
+/**
+ * Initialize stock update forms with AJAX submission and validation
+ */
+function initStockUpdateForms() {
+    // Get all stock update forms
+    const stockForms = document.querySelectorAll('.stock-update-form');
+
+    // Add event listener to each form
+    stockForms.forEach(form => {
+        // Add validation to quantity input
+        const quantityInput = form.querySelector('input[name="quantity"]');
+        if (quantityInput) {
+            quantityInput.addEventListener('input', function() {
+                validateQuantityInput(this);
+            });
+        }
+
+        // Add submit handler
+        form.addEventListener('submit', function(e) {
+            e.preventDefault();
+
+            // Validate form before submission
+            if (!validateStockForm(form)) {
+                return;
+            }
+
+            // Get form data
+            const formData = new FormData(form);
+
+            // Show loading state
+            const submitButton = form.querySelector('button[type="submit"]');
+            const originalText = submitButton.textContent;
+            submitButton.textContent = 'Updating...';
+            submitButton.disabled = true;
+
+            // Send AJAX request
+            fetch(form.action, {
+                method: 'POST',
+                body: formData
+            })
+            .then(response => {
+                if (!response.ok) {
+                    throw new Error('Network response was not ok');
+                }
+                return response.json();
+            })
+            .then(data => {
+                // Reset button state
+                submitButton.textContent = originalText;
+                submitButton.disabled = false;
+
+                if (data.success) {
+                    // Show success message
+                    showAlert(form.parentNode, 'success', 'Stock updated successfully.');
+                } else {
+                    // Show error message
+                    showAlert(form.parentNode, 'danger', `Error updating stock: ${data.message}`);
+                }
+            })
+            .catch(error => {
+                // Reset button state
+                submitButton.textContent = originalText;
+                submitButton.disabled = false;
+
+                // Show error message
+                showAlert(form.parentNode, 'danger', `Error: ${error.message}`);
+                console.error('Error:', error);
+            });
+        });
+    });
+}
+
+/**
+ * Initialize edit buttons
+ */
+function initEditButtons() {
+    const editButtons = document.querySelectorAll('.btn-edit-drink-type');
+
+    editButtons.forEach(button => {
+        button.addEventListener('click', function() {
+            const drinkTypeId = this.dataset.drinkTypeId;
+            window.location.href = `/drink-types/edit/${drinkTypeId}`;
+        });
+    });
+}
+
+/**
+ * Validate a stock update form
+ * @param {HTMLFormElement} form - The form to validate
+ * @returns {boolean} - Whether the form is valid
+ */
+function validateStockForm(form) {
+    const quantityInput = form.querySelector('input[name="quantity"]');
+    return validateQuantityInput(quantityInput);
+}
+
+/**
+ * Validate a quantity input
+ * @param {HTMLInputElement} input - The input to validate
+ * @returns {boolean} - Whether the input is valid
+ */
+function validateQuantityInput(input) {
+    const value = parseInt(input.value);
+
+    // Check if value is a number
+    if (isNaN(value)) {
+        input.classList.add('is-invalid');
+        showInputError(input, 'Please enter a valid number');
+        return false;
+    }
+
+    // Check if value is non-negative
+    if (value < 0) {
+        input.classList.add('is-invalid');
+        showInputError(input, 'Quantity cannot be negative');
+        return false;
+    }
+
+    // Input is valid
+    input.classList.remove('is-invalid');
+    input.classList.add('is-valid');
+    return true;
+}
+
+/**
+ * Show an error message for an input
+ * @param {HTMLInputElement} input - The input with the error
+ * @param {string} message - The error message
+ */
+function showInputError(input, message) {
+    // Remove any existing error message
+    const existingError = input.parentNode.querySelector('.invalid-feedback');
+    if (existingError) {
+        existingError.remove();
+    }
+
+    // Create and add new error message
+    const errorDiv = document.createElement('div');
+    errorDiv.className = 'invalid-feedback';
+    errorDiv.textContent = message;
+    input.parentNode.appendChild(errorDiv);
+}
+
+/**
+ * Show an alert message
+ * @param {HTMLElement} container - The container to add the alert to
+ * @param {string} type - The type of alert (success, danger, warning, info)
+ * @param {string} message - The alert message
+ */
+function showAlert(container, type, message) {
+    // Remove any existing alerts
+    const existingAlerts = container.querySelectorAll('.alert');
+    existingAlerts.forEach(alert => alert.remove());
+
+    // Create and add new alert
+    const alert = document.createElement('div');
+    alert.className = `alert alert-${type} alert-dismissible fade show mt-3`;
+    alert.innerHTML = `
+        ${message}
+        <button type="button" class="btn-close" data-bs-dismiss="alert" aria-label="Close"></button>
+    `;
+    container.appendChild(alert);
+
+    // Remove alert after 3 seconds
+    setTimeout(() => {
+        alert.remove();
+    }, 3000);
+}
+
+/**
+ * Initialize order forms with validation and dynamic item handling
+ */
+function initOrderForms() {
+    const orderForm = document.getElementById('orderForm');
+    if (!orderForm) return;
+
+    // Validate all quantity inputs
+    const quantityInputs = orderForm.querySelectorAll('input[type="number"]');
+    quantityInputs.forEach(input => {
+        input.addEventListener('input', function() {
+            validateQuantityInput(this);
+        });
+    });
+
+    // Add form submission handler
+    orderForm.addEventListener('submit', function(e) {
+        // Validate all inputs before submission
+        let isValid = true;
+        quantityInputs.forEach(input => {
+            if (!validateQuantityInput(input)) {
+                isValid = false;
+            }
+        });
+
+        if (!isValid) {
+            e.preventDefault();
+            showAlert(orderForm, 'danger', 'Please correct the errors in the form before submitting.');
+        }
+    });
+
+    // Add "Add Item" button functionality if it exists
+    const addItemButton = document.getElementById('addOrderItem');
+    if (addItemButton) {
+        addItemButton.addEventListener('click', function() {
+            addOrderItem();
+        });
+    }
+
+    // Add "Remove Item" button functionality
+    const removeButtons = orderForm.querySelectorAll('.remove-order-item');
+    removeButtons.forEach(button => {
+        button.addEventListener('click', function() {
+            removeOrderItem(this);
+        });
+    });
+}
+
+/**
+ * Add a new order item row to the order form
+ */
+function addOrderItem() {
+    const orderItemsTable = document.querySelector('#orderForm table tbody');
+    const drinkTypeSelect = document.getElementById('drinkTypeSelect');
+
+    if (!orderItemsTable || !drinkTypeSelect) return;
+
+    // Get the selected drink type
+    const selectedOption = drinkTypeSelect.options[drinkTypeSelect.selectedIndex];
+    const drinkTypeId = selectedOption.value;
+    const drinkTypeName = selectedOption.text;
+
+    // Check if this drink type is already in the table
+    const existingRow = orderItemsTable.querySelector(`input[value="${drinkTypeId}"]`);
+    if (existingRow) {
+        showAlert(orderItemsTable.parentNode, 'warning', `${drinkTypeName} is already in the order.`);
+        return;
+    }
+
+    // Create a new row
+    const newRow = document.createElement('tr');
+    const rowCount = orderItemsTable.querySelectorAll('tr').length;
+
+    newRow.innerHTML = `
+        <td>${drinkTypeName}</td>
+        <td>
+            <input type="hidden" name="items[${rowCount}][drinkTypeId]" value="${drinkTypeId}">
+            <input type="number" name="items[${rowCount}][quantity]" 
+                   class="form-control form-control-sm order-quantity" 
+                   value="1" min="0">
+        </td>
+        <td>
+            <button type="button" class="btn btn-sm btn-danger remove-order-item">Remove</button>
+        </td>
+    `;
+
+    // Add event listeners to the new row
+    const quantityInput = newRow.querySelector('input[type="number"]');
+    quantityInput.addEventListener('input', function() {
+        validateQuantityInput(this);
+    });
+
+    const removeButton = newRow.querySelector('.remove-order-item');
+    removeButton.addEventListener('click', function() {
+        removeOrderItem(this);
+    });
+
+    // Add the row to the table
+    orderItemsTable.appendChild(newRow);
+}
+
+/**
+ * Remove an order item row from the order form
+ * @param {HTMLElement} button - The remove button that was clicked
+ */
+function removeOrderItem(button) {
+    const row = button.closest('tr');
+    if (row) {
+        row.remove();
+    }
+}
+
+/**
+ * Initialize order status forms with AJAX submission
+ */
+function initOrderStatusForms() {
+    const statusForm = document.querySelector('form[action^="/orders/update-status/"]');
+    if (!statusForm) return;
+
+    statusForm.addEventListener('submit', function(e) {
+        e.preventDefault();
+
+        // Get form data
+        const formData = new FormData(statusForm);
+
+        // Show loading state
+        const submitButton = statusForm.querySelector('button[type="submit"]');
+        const originalText = submitButton.textContent;
+        submitButton.textContent = 'Updating...';
+        submitButton.disabled = true;
+
+        // Send AJAX request
+        fetch(statusForm.action, {
+            method: 'POST',
+            body: formData
+        })
+        .then(response => {
+            if (!response.ok) {
+                throw new Error('Network response was not ok');
+            }
+            return response.json();
+        })
+        .then(data => {
+            // Reset button state
+            submitButton.textContent = originalText;
+            submitButton.disabled = false;
+
+            if (data.success) {
+                // Show success message
+                showAlert(statusForm.parentNode, 'success', 'Order status updated successfully.');
+
+                // Update the status badge
+                const statusBadge = document.querySelector('.badge');
+                if (statusBadge) {
+                    // Remove old status classes
+                    statusBadge.classList.remove('bg-primary', 'bg-warning', 'bg-info', 'bg-success');
+
+                    // Add new status class
+                    const newStatus = formData.get('status');
+                    if (newStatus === 'new') {
+                        statusBadge.classList.add('bg-primary');
+                    } else if (newStatus === 'in_work') {
+                        statusBadge.classList.add('bg-warning');
+                    } else if (newStatus === 'ordered') {
+                        statusBadge.classList.add('bg-info');
+                    } else if (newStatus === 'fulfilled') {
+                        statusBadge.classList.add('bg-success');
+                    }
+
+                    // Update the text
+                    statusBadge.textContent = newStatus.charAt(0).toUpperCase() + newStatus.slice(1);
+                }
+            } else {
+                // Show error message
+                showAlert(statusForm.parentNode, 'danger', `Error updating status: ${data.message}`);
+            }
+        })
+        .catch(error => {
+            // Reset button state
+            submitButton.textContent = originalText;
+            submitButton.disabled = false;
+
+            // Show error message
+            showAlert(statusForm.parentNode, 'danger', `Error: ${error.message}`);
+            console.error('Error:', error);
+        });
+    });
+}
+
+/**
+ * Initialize inventory form with validation, highlighting for changed values, and AJAX submission
+ */
+function initInventoryForm() {
+    const inventoryForm = document.getElementById('inventoryForm');
+    if (!inventoryForm) return;
+
+    // Get all quantity inputs
+    const quantityInputs = inventoryForm.querySelectorAll('.inventory-quantity');
+
+    // Add event listener to each input for validation and highlighting
+    quantityInputs.forEach(input => {
+        // Store original value for comparison
+        const originalValue = parseInt(input.dataset.originalValue);
+
+        // Add input event listener for validation
+        input.addEventListener('input', function() {
+            // Validate input
+            validateQuantityInput(this);
+
+            // Highlight changed values
+            const currentValue = parseInt(this.value);
+            if (currentValue !== originalValue) {
+                this.classList.add('bg-warning', 'text-dark');
+            } else {
+                this.classList.remove('bg-warning', 'text-dark');
+            }
+        });
+    });
+
+    // Add submit handler
+    inventoryForm.addEventListener('submit', function(e) {
+        e.preventDefault();
+
+        // Validate all inputs before submission
+        let isValid = true;
+        quantityInputs.forEach(input => {
+            if (!validateQuantityInput(input)) {
+                isValid = false;
+            }
+        });
+
+        if (!isValid) {
+            showAlert(inventoryForm, 'danger', 'Please correct the errors in the form before submitting.');
+            return;
+        }
+
+        // Check if any values have changed
+        let hasChanges = false;
+        quantityInputs.forEach(input => {
+            const originalValue = parseInt(input.dataset.originalValue);
+            const currentValue = parseInt(input.value);
+            if (currentValue !== originalValue) {
+                hasChanges = true;
+            }
+        });
+
+        if (!hasChanges) {
+            showAlert(inventoryForm, 'warning', 'No changes detected. Nothing to update.');
+            return;
+        }
+
+        // Get form data
+        const formData = new FormData(inventoryForm);
+
+        // Add X-Requested-With header to indicate AJAX request
+        const headers = new Headers({
+            'X-Requested-With': 'XMLHttpRequest'
+        });
+
+        // Show loading state
+        const submitButton = inventoryForm.querySelector('button[type="submit"]');
+        const originalText = submitButton.textContent;
+        submitButton.textContent = 'Updating...';
+        submitButton.disabled = true;
+
+        // Send AJAX request
+        fetch(inventoryForm.action, {
+            method: 'POST',
+            headers: headers,
+            body: formData
+        })
+        .then(response => {
+            if (!response.ok) {
+                throw new Error('Network response was not ok');
+            }
+            return response.json();
+        })
+        .then(data => {
+            // Reset button state
+            submitButton.textContent = originalText;
+            submitButton.disabled = false;
+
+            if (data.success) {
+                // Show success message
+                showAlert(inventoryForm, 'success', 'Inventory updated successfully.');
+
+                // Update original values and remove highlighting
+                quantityInputs.forEach(input => {
+                    const drinkTypeId = input.previousElementSibling.value;
+                    const updatedItem = data.updatedItems.find(item => item.drinkTypeId == drinkTypeId);
+
+                    if (updatedItem) {
+                        input.dataset.originalValue = updatedItem.newQuantity;
+                        input.classList.remove('bg-warning', 'text-dark');
+                    }
+                });
+
+                // Show update results
+                const updateResults = document.getElementById('updateResults');
+                const updateResultsContent = document.getElementById('updateResultsContent');
+
+                if (updateResults && updateResultsContent) {
+                    updateResults.classList.remove('d-none');
+
+                    let resultsHtml = '<h6>The following items were updated:</h6><ul>';
+                    data.updatedItems.forEach(item => {
+                        resultsHtml += `<li>${item.name}: ${item.oldQuantity} → ${item.newQuantity}</li>`;
+                    });
+                    resultsHtml += '</ul>';
+
+                    updateResultsContent.innerHTML = resultsHtml;
+                }
+            } else {
+                // Show error message
+                let errorMessage = 'Error updating inventory.';
+                if (data.errors && data.errors.length > 0) {
+                    errorMessage += ' ' + data.errors.join(' ');
+                }
+                showAlert(inventoryForm, 'danger', errorMessage);
+            }
+        })
+        .catch(error => {
+            // Reset button state
+            submitButton.textContent = originalText;
+            submitButton.disabled = false;
+
+            // Show error message
+            showAlert(inventoryForm, 'danger', `Error: ${error.message}`);
+            console.error('Error:', error);
+        });
+    });
+}
+
+/**
+ * Initialize settings form with validation and AJAX submission
+ */
+function initSettingsForm() {
+    const settingsForm = document.getElementById('settings-form');
+    if (!settingsForm) return;
+
+    // Get all inputs
+    const textInputs = settingsForm.querySelectorAll('input[type="text"]');
+    const numberInputs = settingsForm.querySelectorAll('input[type="number"]');
+
+    // Add event listeners for validation
+    textInputs.forEach(input => {
+        input.addEventListener('input', function() {
+            validateSettingTextInput(this);
+        });
+    });
+
+    numberInputs.forEach(input => {
+        input.addEventListener('input', function() {
+            validateSettingNumberInput(this);
+        });
+    });
+
+    // Add submit handler
+    settingsForm.addEventListener('submit', function(e) {
+        // Validate all inputs before submission
+        let isValid = true;
+
+        textInputs.forEach(input => {
+            if (!validateSettingTextInput(input)) {
+                isValid = false;
+            }
+        });
+
+        numberInputs.forEach(input => {
+            if (!validateSettingNumberInput(input)) {
+                isValid = false;
+            }
+        });
+
+        if (!isValid) {
+            e.preventDefault();
+            showAlert(settingsForm, 'danger', 'Please correct the errors in the form before submitting.');
+        }
+    });
+
+    // Reset to defaults button
+    const resetButton = document.getElementById('reset-defaults');
+    if (resetButton) {
+        resetButton.addEventListener('click', function() {
+            if (confirm('Are you sure you want to reset all settings to their default values?')) {
+                window.location.href = '/settings/reset';
+            }
+        });
+    }
+}
+
+/**
+ * Validate a text input for settings
+ * @param {HTMLInputElement} input - The input to validate
+ * @returns {boolean} - Whether the input is valid
+ */
+function validateSettingTextInput(input) {
+    // Check if value is empty
+    if (input.value.trim() === '') {
+        input.classList.add('is-invalid');
+        showInputError(input, 'This field cannot be empty');
+        return false;
+    }
+
+    // Input is valid
+    input.classList.remove('is-invalid');
+    input.classList.add('is-valid');
+    return true;
+}
+
+/**
+ * Validate a number input for settings
+ * @param {HTMLInputElement} input - The input to validate
+ * @returns {boolean} - Whether the input is valid
+ */
+function validateSettingNumberInput(input) {
+    const value = parseInt(input.value);
+
+    // Check if value is a number
+    if (isNaN(value)) {
+        input.classList.add('is-invalid');
+        showInputError(input, 'Please enter a valid number');
+        return false;
+    }
+
+    // Check if value is positive
+    if (value < 1) {
+        input.classList.add('is-invalid');
+        showInputError(input, 'Please enter a positive number');
+        return false;
+    }
+
+    // Input is valid
+    input.classList.remove('is-invalid');
+    input.classList.add('is-valid');
+    return true;
+}
+
+/**
+ * Initialize drink type form with validation and AJAX name uniqueness check
+ */
+function initDrinkTypeForm() {
+    const drinkTypeForm = document.getElementById('drink-type-form');
+    if (!drinkTypeForm) return;
+
+    // Get form inputs
+    const nameInput = drinkTypeForm.querySelector('input[name="name"]');
+    const descriptionInput = drinkTypeForm.querySelector('textarea[name="description"]');
+    const desiredStockInput = drinkTypeForm.querySelector('input[name="desired_stock"]');
+
+    // Store original name for edit mode
+    const originalName = nameInput ? nameInput.value : '';
+
+    // Add validation for name input
+    if (nameInput) {
+        nameInput.addEventListener('input', function() {
+            validateDrinkTypeName(this, originalName);
+        });
+
+        // Check name uniqueness on blur
+        nameInput.addEventListener('blur', function() {
+            checkDrinkTypeNameUniqueness(this, originalName);
+        });
+    }
+
+    // Add validation for desired stock input
+    if (desiredStockInput) {
+        desiredStockInput.addEventListener('input', function() {
+            validateDesiredStock(this);
+        });
+    }
+
+    // Add form submission handler
+    drinkTypeForm.addEventListener('submit', function(e) {
+        let isValid = true;
+
+        // Validate name
+        if (nameInput && !validateDrinkTypeName(nameInput, originalName)) {
+            isValid = false;
+        }
+
+        // Validate desired stock
+        if (desiredStockInput && !validateDesiredStock(desiredStockInput)) {
+            isValid = false;
+        }
+
+        if (!isValid) {
+            e.preventDefault();
+            showAlert(drinkTypeForm, 'danger', 'Please correct the errors in the form before submitting.');
+        }
+    });
+}
+
+/**
+ * Validate a drink type name
+ * @param {HTMLInputElement} input - The input to validate
+ * @param {string} originalName - The original name (for edit mode)
+ * @returns {boolean} - Whether the input is valid
+ */
+function validateDrinkTypeName(input, originalName) {
+    const value = input.value.trim();
+
+    // Check if value is empty
+    if (value === '') {
+        input.classList.add('is-invalid');
+        showInputError(input, 'Name is required');
+        return false;
+    }
+
+    // Check if value is too long
+    if (value.length > 255) {
+        input.classList.add('is-invalid');
+        showInputError(input, 'Name cannot be longer than 255 characters');
+        return false;
+    }
+
+    // Input is valid
+    input.classList.remove('is-invalid');
+    input.classList.add('is-valid');
+    return true;
+}
+
+/**
+ * Check if a drink type name is unique
+ * @param {HTMLInputElement} input - The input to check
+ * @param {string} originalName - The original name (for edit mode)
+ */
+function checkDrinkTypeNameUniqueness(input, originalName) {
+    const value = input.value.trim();
+
+    // Skip check if name hasn't changed or is empty
+    if (value === '' || value === originalName) {
+        return;
+    }
+
+    // Show loading state
+    input.classList.add('is-loading');
+
+    // Check if name already exists
+    fetch(`/api/drink-types/check-name?name=${encodeURIComponent(value)}`)
+        .then(response => {
+            if (!response.ok) {
+                throw new Error('Network response was not ok');
+            }
+            return response.json();
+        })
+        .then(data => {
+            // Remove loading state
+            input.classList.remove('is-loading');
+
+            if (data.exists) {
+                input.classList.add('is-invalid');
+                showInputError(input, 'A drink type with this name already exists');
+            }
+        })
+        .catch(error => {
+            // Remove loading state
+            input.classList.remove('is-loading');
+            console.error('Error checking name uniqueness:', error);
+        });
+}
+
+/**
+ * Validate a desired stock input
+ * @param {HTMLInputElement} input - The input to validate
+ * @returns {boolean} - Whether the input is valid
+ */
+function validateDesiredStock(input) {
+    const value = parseInt(input.value);
+
+    // Check if value is a number
+    if (isNaN(value)) {
+        input.classList.add('is-invalid');
+        showInputError(input, 'Desired stock must be a number');
+        return false;
+    }
+
+    // Check if value is non-negative
+    if (value < 0) {
+        input.classList.add('is-invalid');
+        showInputError(input, 'Desired stock cannot be negative');
+        return false;
+    }
+
+    // Input is valid
+    input.classList.remove('is-invalid');
+    input.classList.add('is-valid');
+    return true;
+}

public/index.php

@@ -1,9 +1,9 @@
 <?php
 
+declare(strict_types=1);
+
 use App\Kernel;
 
 require_once dirname(__DIR__) . '/vendor/autoload_runtime.php';
 
-return function (array $context) {
-    return new Kernel($context['APP_ENV'], (bool) $context['APP_DEBUG']);
-};
+return fn(array $context): Kernel => new Kernel($context['APP_ENV'], (bool) $context['APP_DEBUG']);

rector.php

@@ -0,0 +1,28 @@
+<?php
+
+declare(strict_types=1);
+
+use Rector\Config\RectorConfig;
+use Rector\Php81\Rector\Array_\FirstClassCallableRector;
+
+return RectorConfig::configure()
+    ->withPaths([
+        __DIR__ . '/public',
+        __DIR__ . '/src',
+        __DIR__ . '/config',
+        __DIR__ . '/tests',
+        __DIR__ . '/bin',
+    ])
+    ->withRootFiles()
+    ->withImportNames(removeUnusedImports: true)
+    ->withPhpSets()
+    ->withPreparedSets(
+        codeQuality: true,
+        typeDeclarations: true,
+        earlyReturn: true,
+        strictBooleans: true,
+    )
+    ->withSkip([
+        FirstClassCallableRector::class,
+    ])
+;

src/Controller/DrinkTypeController.php

@@ -0,0 +1,84 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Controller;
+
+use App\Entity\DrinkType;
+use App\Form\DrinkTypeForm;
+use App\Repository\DrinkTypeRepository;
+use App\Service\InventoryService;
+use Doctrine\ORM\EntityManagerInterface;
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\Routing\Attribute\Route;
+
+#[Route('/drink-type')]
+final class DrinkTypeController extends AbstractController
+{
+    #[Route(name: 'app_drink_type_index', methods: ['GET'])]
+    public function index(InventoryService $inventoryService): Response
+    {
+        return $this->render('drink_type/index.html.twig', [
+            'drink_stocks' => $inventoryService->getAllDrinkTypesWithStockLevels(true)
+        ]);
+    }
+
+    #[Route(path: '/new', name: 'app_drink_type_new', methods: ['GET', 'POST'])]
+    public function new(Request $request, EntityManagerInterface $entityManager): Response
+    {
+        $drinkType = new DrinkType('', '');
+        $form = $this->createForm(DrinkTypeForm::class, $drinkType);
+        $form->handleRequest($request);
+
+        if ($form->isSubmitted() && $form->isValid()) {
+            $entityManager->persist($drinkType);
+            $entityManager->flush();
+
+            return $this->redirectToRoute('app_drink_type_index', [], Response::HTTP_SEE_OTHER);
+        }
+
+        return $this->render('drink_type/new.html.twig', [
+            'drink_type' => $drinkType,
+            'form' => $form,
+        ]);
+    }
+
+    #[Route(path: '/{id}', name: 'app_drink_type_show', methods: ['GET'])]
+    public function show(DrinkType $drinkType): Response
+    {
+        return $this->render('drink_type/show.html.twig', [
+            'drink_type' => $drinkType,
+        ]);
+    }
+
+    #[Route(path: '/{id}/edit', name: 'app_drink_type_edit', methods: ['GET', 'POST'])]
+    public function edit(Request $request, DrinkType $drinkType, EntityManagerInterface $entityManager): Response
+    {
+        $form = $this->createForm(DrinkTypeForm::class, $drinkType);
+        $form->handleRequest($request);
+
+        if ($form->isSubmitted() && $form->isValid()) {
+            $entityManager->flush();
+
+            return $this->redirectToRoute('app_drink_type_index', [], Response::HTTP_SEE_OTHER);
+        }
+
+        return $this->render('drink_type/edit.html.twig', [
+            'drink_type' => $drinkType,
+            'form' => $form,
+        ]);
+    }
+
+    #[Route(path: '/{id}', name: 'app_drink_type_delete', methods: ['POST'])]
+    public function delete(Request $request, DrinkType $drinkType, EntityManagerInterface $entityManager): Response
+    {
+        if ($this->isCsrfTokenValid('delete' . $drinkType->getId(), $request->getPayload()->getString('_token'))) {
+            $entityManager->remove($drinkType);
+            $entityManager->flush();
+        }
+
+        return $this->redirectToRoute('app_drink_type_index', [], Response::HTTP_SEE_OTHER);
+    }
+}

src/Controller/Index.php

@@ -0,0 +1,27 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Controller;
+
+use App\Service\InventoryService;
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\Routing\Attribute\Route;
+
+#[Route(path: '/', name: 'app_index')]
+final class Index extends AbstractController
+{
+    public function __construct(
+        private readonly InventoryService $inventoryService,
+    ) {}
+
+    public function __invoke(): Response
+    {
+        $drinkStocks = $this->inventoryService->getAllDrinkTypesWithStockLevels();
+
+        return $this->render('index.html.twig', [
+            'drinkStocks' => $drinkStocks,
+        ]);
+    }
+}

src/Entity/DrinkType.php

@@ -0,0 +1,115 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Entity;
+
+use App\Repository\DrinkTypeRepository;
+use DateTimeImmutable;
+use Doctrine\Common\Collections\ArrayCollection;
+use Doctrine\Common\Collections\Collection;
+use Doctrine\ORM\Mapping as ORM;
+
+#[ORM\Entity(repositoryClass: DrinkTypeRepository::class)]
+#[ORM\Table(name: 'drink_type')]
+class DrinkType
+{
+    #[ORM\Id]
+    #[ORM\GeneratedValue]
+    #[ORM\Column(type: 'integer')]
+    private null|int $id = null;
+
+    #[ORM\Column(type: 'datetime_immutable')]
+    private readonly DateTimeImmutable $createdAt;
+
+    #[ORM\Column(type: 'datetime_immutable')]
+    private DateTimeImmutable $updatedAt;
+
+    #[ORM\OneToMany(mappedBy: 'drinkType', targetEntity: InventoryRecord::class)]
+    private Collection $inventoryRecords;
+
+    #[ORM\OneToMany(mappedBy: 'drinkType', targetEntity: OrderItem::class)]
+    private Collection $orderItems;
+
+    public function __construct(
+        #[ORM\Column(type: 'string', length: 255, unique: true)]
+        private string $name,
+        #[ORM\Column(type: 'text', nullable: true)]
+        private null|string $description = null,
+        #[ORM\Column(type: 'integer')]
+        private int $desiredStock = 10,
+        null|DateTimeImmutable $createdAt = null,
+        null|DateTimeImmutable $updatedAt = null,
+    ) {
+        $this->createdAt = $createdAt ?? new DateTimeImmutable();
+        $this->updatedAt = $updatedAt ?? new DateTimeImmutable();
+        $this->inventoryRecords = new ArrayCollection();
+        $this->orderItems = new ArrayCollection();
+    }
+
+    public function getId(): null|int
+    {
+        return $this->id;
+    }
+
+    public function getName(): string
+    {
+        return $this->name;
+    }
+
+    public function setName(string $name): self
+    {
+        $this->name = $name;
+        $this->updateTimestamp();
+        return $this;
+    }
+
+    public function getDescription(): null|string
+    {
+        return $this->description;
+    }
+
+    public function setDescription(null|string $description): self
+    {
+        $this->description = $description;
+        $this->updateTimestamp();
+        return $this;
+    }
+
+    public function getDesiredStock(): int
+    {
+        return $this->desiredStock;
+    }
+
+    public function setDesiredStock(int $desiredStock): self
+    {
+        $this->desiredStock = $desiredStock;
+        $this->updateTimestamp();
+        return $this;
+    }
+
+    public function getCreatedAt(): DateTimeImmutable
+    {
+        return $this->createdAt;
+    }
+
+    public function getUpdatedAt(): DateTimeImmutable
+    {
+        return $this->updatedAt;
+    }
+
+    public function getInventoryRecords(): Collection
+    {
+        return $this->inventoryRecords;
+    }
+
+    public function getOrderItems(): Collection
+    {
+        return $this->orderItems;
+    }
+
+    private function updateTimestamp(): void
+    {
+        $this->updatedAt = new DateTimeImmutable();
+    }
+}

src/Entity/InventoryRecord.php

@@ -0,0 +1,89 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Entity;
+
+use App\Repository\InventoryRecordRepository;
+use DateTimeImmutable;
+use Doctrine\ORM\Mapping as ORM;
+
+#[ORM\Entity(repositoryClass: InventoryRecordRepository::class)]
+#[ORM\Table(name: 'inventory_record')]
+class InventoryRecord
+{
+    #[ORM\Id]
+    #[ORM\GeneratedValue]
+    #[ORM\Column(type: 'integer')]
+    private null|int $id = null;
+
+    public function __construct(
+        #[ORM\ManyToOne(targetEntity: DrinkType::class, inversedBy: 'inventoryRecords')]
+        #[ORM\JoinColumn(name: 'drink_type_id', referencedColumnName: 'id', nullable: false)]
+        private DrinkType $drinkType,
+        #[ORM\Column(type: 'integer')]
+        private int $quantity,
+        #[ORM\Column(type: 'datetime_immutable')]
+        private DateTimeImmutable $timestamp = new DateTimeImmutable(),
+        #[ORM\Column(type: 'datetime_immutable')]
+        private DateTimeImmutable $createdAt = new DateTimeImmutable(),
+        #[ORM\Column(type: 'datetime_immutable')]
+        private DateTimeImmutable $updatedAt = new DateTimeImmutable(),
+    ) {}
+
+    public function getId(): null|int
+    {
+        return $this->id;
+    }
+
+    public function getDrinkType(): DrinkType
+    {
+        return $this->drinkType;
+    }
+
+    public function setDrinkType(DrinkType $drinkType): self
+    {
+        $this->drinkType = $drinkType;
+        $this->updateTimestamp();
+        return $this;
+    }
+
+    public function getQuantity(): int
+    {
+        return $this->quantity;
+    }
+
+    public function setQuantity(int $quantity): self
+    {
+        $this->quantity = $quantity;
+        $this->updateTimestamp();
+        return $this;
+    }
+
+    public function getTimestamp(): DateTimeImmutable
+    {
+        return $this->timestamp;
+    }
+
+    public function setTimestamp(DateTimeImmutable $timestamp): self
+    {
+        $this->timestamp = $timestamp;
+        $this->updateTimestamp();
+        return $this;
+    }
+
+    public function getCreatedAt(): DateTimeImmutable
+    {
+        return $this->createdAt;
+    }
+
+    public function getUpdatedAt(): DateTimeImmutable
+    {
+        return $this->updatedAt;
+    }
+
+    private function updateTimestamp(): void
+    {
+        $this->updatedAt = new DateTimeImmutable();
+    }
+}

src/Entity/Order.php

@@ -0,0 +1,104 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Entity;
+
+use App\Enum\OrderStatus;
+use App\Repository\OrderRepository;
+use DateTimeImmutable;
+use Doctrine\Common\Collections\ArrayCollection;
+use Doctrine\Common\Collections\Collection;
+use Doctrine\ORM\Mapping as ORM;
+
+#[ORM\Entity(repositoryClass: OrderRepository::class)]
+#[ORM\Table(name: '`order`')] // 'order' is a reserved keyword in SQL, so we escape it
+class Order
+{
+    #[ORM\Id]
+    #[ORM\GeneratedValue]
+    #[ORM\Column(type: 'integer')]
+    private null|int $id = null;
+
+    #[ORM\Column(type: 'datetime_immutable')]
+    private readonly DateTimeImmutable $createdAt;
+
+    #[ORM\Column(type: 'datetime_immutable')]
+    private DateTimeImmutable $updatedAt;
+
+    #[ORM\OneToMany(mappedBy: 'order', targetEntity: OrderItem::class, cascade: ['persist', 'remove'])]
+    private Collection $orderItems;
+
+    public function __construct(
+        #[ORM\Column(nullable: false, enumType: OrderStatus::class, options: [
+            'default' => OrderStatus::NEW,
+        ])]
+        private OrderStatus $status = OrderStatus::NEW,
+        null|DateTimeImmutable $createdAt = null,
+        null|DateTimeImmutable $updatedAt = null,
+    ) {
+        $this->createdAt = $createdAt ?? new DateTimeImmutable();
+        $this->updatedAt = $updatedAt ?? new DateTimeImmutable();
+        $this->orderItems = new ArrayCollection();
+    }
+
+    public function getId(): null|int
+    {
+        return $this->id;
+    }
+
+    public function getStatus(): OrderStatus
+    {
+        return $this->status;
+    }
+
+    public function setStatus(OrderStatus $status): self
+    {
+        $this->status = $status;
+        $this->updateTimestamp();
+        return $this;
+    }
+
+    public function getCreatedAt(): DateTimeImmutable
+    {
+        return $this->createdAt;
+    }
+
+    public function getUpdatedAt(): DateTimeImmutable
+    {
+        return $this->updatedAt;
+    }
+
+    /**
+     * @return Collection<int, OrderItem>
+     */
+    public function getOrderItems(): Collection
+    {
+        return $this->orderItems;
+    }
+
+    public function addOrderItem(OrderItem $orderItem): self
+    {
+        if (!$this->orderItems->contains($orderItem)) {
+            $this->orderItems[] = $orderItem;
+            $orderItem->setOrder($this);
+        }
+
+        return $this;
+    }
+
+    public function removeOrderItem(OrderItem $orderItem): self
+    {
+        // set the owning side to null (unless already changed)
+        if ($this->orderItems->removeElement($orderItem) && $orderItem->getOrder() === $this) {
+            $orderItem->setOrder(null);
+        }
+
+        return $this;
+    }
+
+    private function updateTimestamp(): void
+    {
+        $this->updatedAt = new DateTimeImmutable();
+    }
+}

src/Entity/OrderItem.php

@@ -0,0 +1,114 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Entity;
+
+use App\Repository\OrderItemRepository;
+use DateTimeImmutable;
+use Doctrine\ORM\Mapping as ORM;
+
+#[ORM\Entity(repositoryClass: OrderItemRepository::class)]
+#[ORM\Table(name: 'order_item')]
+class OrderItem
+{
+    #[ORM\Id]
+    #[ORM\GeneratedValue]
+    #[ORM\Column(type: 'integer')]
+    private null|int $id = null;
+
+    #[ORM\Column(type: 'datetime_immutable')]
+    private readonly DateTimeImmutable $createdAt;
+
+    #[ORM\Column(type: 'datetime_immutable')]
+    private DateTimeImmutable $updatedAt;
+
+    public function __construct(
+        #[ORM\ManyToOne(targetEntity: DrinkType::class, inversedBy: 'orderItems')]
+        #[ORM\JoinColumn(name: 'drink_type_id', referencedColumnName: 'id', nullable: false)]
+        private DrinkType $drinkType,
+        #[ORM\Column(type: 'integer')]
+        private int $quantity,
+        #[ORM\ManyToOne(targetEntity: Order::class, inversedBy: 'orderItems')]
+        #[ORM\JoinColumn(name: 'order_id', referencedColumnName: 'id', nullable: false)]
+        private null|Order $order = null,
+        null|DateTimeImmutable $createdAt = null,
+        null|DateTimeImmutable $updatedAt = null,
+    ) {
+        $this->createdAt = $createdAt ?? new DateTimeImmutable();
+        $this->updatedAt = $updatedAt ?? new DateTimeImmutable();
+
+        // Establish bidirectional relationship
+        if ($this->order instanceof Order) {
+            $this->order->addOrderItem($this);
+        }
+    }
+
+    public function getId(): null|int
+    {
+        return $this->id;
+    }
+
+    public function getOrder(): null|Order
+    {
+        return $this->order;
+    }
+
+    public function setOrder(null|Order $order): self
+    {
+        // Remove from old order if exists
+        if ($this->order instanceof Order && $this->order !== $order) {
+            $this->order->removeOrderItem($this);
+        }
+
+        // Set new order
+        $this->order = $order;
+
+        // Add to new order if not null
+        if ($order instanceof Order && !$order->getOrderItems()->contains($this)) {
+            $order->addOrderItem($this);
+        }
+
+        $this->updateTimestamp();
+        return $this;
+    }
+
+    public function getDrinkType(): DrinkType
+    {
+        return $this->drinkType;
+    }
+
+    public function setDrinkType(DrinkType $drinkType): self
+    {
+        $this->drinkType = $drinkType;
+        $this->updateTimestamp();
+        return $this;
+    }
+
+    public function getQuantity(): int
+    {
+        return $this->quantity;
+    }
+
+    public function setQuantity(int $quantity): self
+    {
+        $this->quantity = $quantity;
+        $this->updateTimestamp();
+        return $this;
+    }
+
+    public function getCreatedAt(): DateTimeImmutable
+    {
+        return $this->createdAt;
+    }
+
+    public function getUpdatedAt(): DateTimeImmutable
+    {
+        return $this->updatedAt;
+    }
+
+    private function updateTimestamp(): void
+    {
+        $this->updatedAt = new DateTimeImmutable();
+    }
+}

src/Entity/SystemConfig.php

@@ -0,0 +1,89 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Entity;
+
+use App\Enum\SystemSettingKey;
+use App\Repository\SystemConfigRepository;
+use DateTimeImmutable;
+use Doctrine\ORM\Mapping as ORM;
+
+#[ORM\Entity(repositoryClass: SystemConfigRepository::class)]
+#[ORM\Table(name: 'system_config')]
+class SystemConfig
+{
+    public const DEFAULT_STOCK_ADJUSTMENT_LOOKBACK_ORDERS = '3';
+    public const DEFAULT_DEFAULT_DESIRED_STOCK = '2';
+    public const DEFAULT_SYSTEM_NAME = 'Zaufen';
+    public const DEFAULT_STOCK_INCREASE_AMOUNT = '1';
+    public const DEFAULT_STOCK_DECREASE_AMOUNT = '1';
+    public const DEFAULT_STOCK_LOW_MULTIPLIER = '0.3';
+
+    #[ORM\Id]
+    #[ORM\GeneratedValue]
+    #[ORM\Column(type: 'integer')]
+    private null|int $id = null;
+
+    #[ORM\Column(type: 'datetime_immutable')]
+    private readonly DateTimeImmutable $createdAt;
+
+    #[ORM\Column(type: 'datetime_immutable')]
+    private DateTimeImmutable $updatedAt;
+
+    public function __construct(
+        #[ORM\Column(unique: true, enumType: SystemSettingKey::class)]
+        private SystemSettingKey $key,
+        #[ORM\Column(type: 'text')]
+        private string $value,
+        null|DateTimeImmutable $createdAt = null,
+        null|DateTimeImmutable $updatedAt = null,
+    ) {
+        $this->createdAt = $createdAt ?? new DateTimeImmutable();
+        $this->updatedAt = $updatedAt ?? new DateTimeImmutable();
+    }
+
+    public function getId(): null|int
+    {
+        return $this->id;
+    }
+
+    public function getKey(): SystemSettingKey
+    {
+        return $this->key;
+    }
+
+    public function setKey(SystemSettingKey $key): self
+    {
+        $this->key = $key;
+        $this->updateTimestamp();
+        return $this;
+    }
+
+    public function getValue(): string
+    {
+        return $this->value;
+    }
+
+    public function setValue(string $value): self
+    {
+        $this->value = $value;
+        $this->updateTimestamp();
+        return $this;
+    }
+
+    public function getCreatedAt(): DateTimeImmutable
+    {
+        return $this->createdAt;
+    }
+
+    public function getUpdatedAt(): DateTimeImmutable
+    {
+        return $this->updatedAt;
+    }
+
+    private function updateTimestamp(): void
+    {
+        $this->updatedAt = new DateTimeImmutable();
+    }
+}

src/Enum/OrderStatus.php

@@ -0,0 +1,14 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Enum;
+
+enum OrderStatus: string
+{
+    case NEW = 'new';
+    case ORDERED = 'ordered';
+    case FULFILLED = 'fulfilled';
+    case IN_WORK = 'in_work';
+    case CANCELLED = 'cancelled';
+}

src/Enum/StockState.php

@@ -0,0 +1,13 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Enum;
+
+enum StockState: string
+{
+    case CRITICAL = 'critical';
+    case LOW = 'low';
+    case NORMAL = 'normal';
+    case HIGH = 'high';
+}

src/Enum/SystemSettingKey.php

@@ -0,0 +1,32 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Enum;
+
+use App\Entity\SystemConfig;
+
+/**
+ * Enum for system setting keys
+ */
+enum SystemSettingKey: string
+{
+    case STOCK_ADJUSTMENT_LOOKBACK_ORDERS = 'stock_adjustment_lookback_orders';
+    case DEFAULT_DESIRED_STOCK = 'default_desired_stock';
+    case SYSTEM_NAME = 'system_name';
+    case STOCK_INCREASE_AMOUNT = 'stock_increase_amount';
+    case STOCK_DECREASE_AMOUNT = 'stock_decrease_amount';
+    case STOCK_LOW_MULTIPLIER = 'stock_low_multiplier';
+
+    public static function getDefaultValue(self $key): string
+    {
+        return match ($key) {
+            self::STOCK_ADJUSTMENT_LOOKBACK_ORDERS => SystemConfig::DEFAULT_STOCK_ADJUSTMENT_LOOKBACK_ORDERS,
+            self::DEFAULT_DESIRED_STOCK => SystemConfig::DEFAULT_DEFAULT_DESIRED_STOCK,
+            self::SYSTEM_NAME => SystemConfig::DEFAULT_SYSTEM_NAME,
+            self::STOCK_INCREASE_AMOUNT => SystemConfig::DEFAULT_STOCK_INCREASE_AMOUNT,
+            self::STOCK_DECREASE_AMOUNT => SystemConfig::DEFAULT_STOCK_DECREASE_AMOUNT,
+            self::STOCK_LOW_MULTIPLIER => SystemConfig::DEFAULT_STOCK_LOW_MULTIPLIER,
+        };
+    }
+}

src/Form/DrinkTypeForm.php

@@ -0,0 +1,25 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Form;
+
+use App\Entity\DrinkType;
+use Symfony\Component\Form\AbstractType;
+use Symfony\Component\Form\FormBuilderInterface;
+use Symfony\Component\OptionsResolver\OptionsResolver;
+
+class DrinkTypeForm extends AbstractType
+{
+    public function buildForm(FormBuilderInterface $builder, array $options): void
+    {
+        $builder->add('name')->add('description')->add('desiredStock');
+    }
+
+    public function configureOptions(OptionsResolver $resolver): void
+    {
+        $resolver->setDefaults([
+            'data_class' => DrinkType::class,
+        ]);
+    }
+}

src/Kernel.php

@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace App;
 
 use Symfony\Bundle\FrameworkBundle\Kernel\MicroKernelTrait;

src/Repository/AbstractRepository.php

@@ -0,0 +1,33 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Repository;
+
+use Doctrine\ORM\EntityRepository;
+
+/**
+ * @template E of object
+ * @extends EntityRepository<E>
+ */
+abstract class AbstractRepository extends EntityRepository
+{
+    /**
+     * @param E $entity
+     * @return void
+     */
+    public function save(object $entity): void
+    {
+        $this->getEntityManager()->persist($entity);
+        $this->getEntityManager()->flush();
+    }
+
+    /**
+     * @param E $entity
+     */
+    public function remove(object $entity): void
+    {
+        $this->getEntityManager()->remove($entity);
+        $this->getEntityManager()->flush();
+    }
+}

src/Repository/DrinkTypeRepository.php

@@ -0,0 +1,48 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Repository;
+
+use App\Entity\DrinkType;
+use Doctrine\ORM\EntityManagerInterface;
+use Override;
+
+/**
+ * @extends AbstractRepository<DrinkType>
+ */
+class DrinkTypeRepository extends AbstractRepository
+{
+    public function __construct(EntityManagerInterface $entityManager)
+    {
+        parent::__construct($entityManager, $entityManager->getClassMetadata(DrinkType::class));
+    }
+
+    /** @inheritDoc */
+    #[Override]
+    public function findAll(): array
+    {
+        return parent::findBy(
+            criteria: [],
+            orderBy: [
+                'desiredStock' => 'DESC',
+            ],
+        );
+    }
+
+    /** @return DrinkType[] */
+    public function findDesired(): array
+    {
+        $qb = $this->getEntityManager()->createQueryBuilder();
+        $qb
+            ->select('d')
+            ->from(DrinkType::class, 'd')
+            ->where('d.desiredStock > 0')
+            ->orderBy('d.desiredStock', 'DESC')
+            ->addOrderBy('d.name', 'ASC');
+
+        /** @var array<int, DrinkType> $result */
+        $result = $qb->getQuery()->getResult();
+        return $result;
+    }
+}

src/Repository/InventoryRecordRepository.php

@@ -0,0 +1,71 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Repository;
+
+use App\Entity\DrinkType;
+use App\Entity\InventoryRecord;
+use DateTimeImmutable;
+use Doctrine\ORM\EntityManagerInterface;
+
+/**
+ * @extends AbstractRepository<InventoryRecord>
+ */
+class InventoryRecordRepository extends AbstractRepository
+{
+    public function __construct(EntityManagerInterface $entityManager)
+    {
+        parent::__construct($entityManager, $entityManager->getClassMetadata(InventoryRecord::class));
+    }
+
+    /**
+     * @return array<int, InventoryRecord>
+     */
+    public function findByDrinkType(DrinkType $drinkType): array
+    {
+        return $this->findBy(
+            [
+                'drinkType' => $drinkType,
+            ],
+            [
+                'timestamp' => 'DESC',
+            ],
+        );
+    }
+
+    public function findLatestByDrinkType(DrinkType $drinkType): null|InventoryRecord
+    {
+        $records = $this->findBy(
+            [
+                'drinkType' => $drinkType,
+            ],
+            [
+                'timestamp' => 'DESC',
+            ],
+            1,
+        );
+
+        return $records[0] ?? null;
+    }
+
+    /**
+     * @return array<int, InventoryRecord>
+     */
+    public function findByTimestampRange(DateTimeImmutable $start, DateTimeImmutable $end): array
+    {
+        $qb = $this->getEntityManager()->createQueryBuilder();
+        $qb
+            ->select('ir')
+            ->from(InventoryRecord::class, 'ir')
+            ->where('ir.timestamp >= :start')
+            ->andWhere('ir.timestamp <= :end')
+            ->setParameter('start', $start)
+            ->setParameter('end', $end)
+            ->orderBy('ir.timestamp', 'DESC');
+
+        /** @var array<int, InventoryRecord> $result */
+        $result = $qb->getQuery()->getResult();
+        return $result;
+    }
+}

src/Repository/OrderItemRepository.php

@@ -0,0 +1,49 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Repository;
+
+use App\Entity\DrinkType;
+use App\Entity\Order;
+use App\Entity\OrderItem;
+use Doctrine\ORM\EntityManagerInterface;
+
+/**
+ * @extends AbstractRepository<OrderItem>
+ */
+class OrderItemRepository extends AbstractRepository
+{
+    public function __construct(EntityManagerInterface $entityManager)
+    {
+        parent::__construct($entityManager, $entityManager->getClassMetadata(OrderItem::class));
+    }
+
+    /**
+     * @return array<int, OrderItem>
+     */
+    public function findByOrder(Order $order): array
+    {
+        return $this->findBy([
+            'order' => $order,
+        ]);
+    }
+
+    /**
+     * @return array<int, OrderItem>
+     */
+    public function findByDrinkType(DrinkType $drinkType): array
+    {
+        return $this->findBy([
+            'drinkType' => $drinkType,
+        ]);
+    }
+
+    public function findByOrderAndDrinkType(Order $order, DrinkType $drinkType): null|OrderItem
+    {
+        return $this->findOneBy([
+            'order' => $order,
+            'drinkType' => $drinkType,
+        ]);
+    }
+}

src/Repository/OrderRepository.php

@@ -0,0 +1,102 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Repository;
+
+use App\Entity\DrinkType;
+use App\Entity\Order;
+use App\Enum\OrderStatus;
+use DateTimeImmutable;
+use Doctrine\ORM\EntityManagerInterface;
+
+/**
+ * @extends AbstractRepository<Order>
+ */
+class OrderRepository extends AbstractRepository
+{
+    public function __construct(EntityManagerInterface $entityManager)
+    {
+        parent::__construct($entityManager, $entityManager->getClassMetadata(Order::class));
+    }
+
+    /**
+     * @return array<int, Order>
+     */
+    public function findByStatus(OrderStatus $status): array
+    {
+        return $this->findBy(
+            [
+                'status' => $status,
+            ],
+            [
+                'createdAt' => 'DESC',
+            ],
+        );
+    }
+
+    /**
+     * @param array<OrderStatus> $stati
+     * @return array<int, Order>
+     */
+    public function findByMultipleStatus(array $stati): array
+    {
+        $qb = $this->getEntityManager()->createQueryBuilder();
+        $qb
+            ->select('o')
+            ->from(Order::class, 'o')
+            ->where('o.status IN (:stati)')
+            ->setParameter('stati', $stati)
+            ->orderBy('o.createdAt', 'DESC');
+
+        /** @var array<int, Order> $result */
+        $result = $qb->getQuery()->getResult();
+        return $result;
+    }
+
+    /**
+     * @return array<int, Order>
+     */
+    public function findByDateRange(DateTimeImmutable $start, DateTimeImmutable $end): array
+    {
+        $qb = $this->getEntityManager()->createQueryBuilder();
+        $qb
+            ->select('o')
+            ->from(Order::class, 'o')
+            ->where('o.createdAt >= :start')
+            ->andWhere('o.createdAt <= :end')
+            ->setParameter('start', $start)
+            ->setParameter('end', $end)
+            ->orderBy('o.createdAt', 'DESC');
+
+        /** @var array<int, Order> $result */
+        $result = $qb->getQuery()->getResult();
+        return $result;
+    }
+
+    /**
+     * Find the last N orders that contain a specific drink type
+     *
+     * @param DrinkType $drinkType The drink type to search for
+     * @param int $limit The maximum number of orders to return
+     * @return array<int, Order> The last N orders containing the drink type, ordered by creation date (newest first)
+     */
+    public function findLastOrdersForDrinkType(DrinkType $drinkType, int $limit = 5): array
+    {
+        $qb = $this->getEntityManager()->createQueryBuilder();
+        $qb
+            ->select('o')
+            ->from(Order::class, 'o')
+            ->join('o.orderItems', 'oi')
+            ->where('oi.drinkType = :drinkType')
+            ->andWhere('o.status = :status') // Only consider fulfilled orders
+            ->setParameter('drinkType', $drinkType)
+            ->setParameter('status', OrderStatus::FULFILLED->value)
+            ->orderBy('o.createdAt', 'DESC')
+            ->setMaxResults($limit);
+
+        /** @var array<int, Order> $result */
+        $result = $qb->getQuery()->getResult();
+        return $result;
+    }
+}

src/Repository/SystemConfigRepository.php

@@ -0,0 +1,50 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Repository;
+
+use App\Entity\SystemConfig;
+use App\Enum\SystemSettingKey;
+use Doctrine\ORM\EntityManagerInterface;
+
+/**
+ * @extends AbstractRepository<SystemConfig>
+ */
+class SystemConfigRepository extends AbstractRepository
+{
+    public function __construct(EntityManagerInterface $entityManager)
+    {
+        parent::__construct($entityManager, $entityManager->getClassMetadata(SystemConfig::class));
+    }
+
+    public function findByKey(SystemSettingKey $key): SystemConfig
+    {
+        $config = $this->findOneBy([
+            'key' => $key->value,
+        ]);
+        if (!($config instanceof SystemConfig)) {
+            $config = new SystemConfig($key, SystemSettingKey::getDefaultValue($key));
+            $this->save($config);
+        }
+        return $config;
+    }
+
+    public function getValue(SystemSettingKey $key, string $default = ''): string
+    {
+        $config = $this->findByKey($key);
+        return ($config instanceof SystemConfig) ? $config->getValue() : $default;
+    }
+
+    public function setValue(SystemSettingKey $key, string $value): void
+    {
+        $config = $this->findByKey($key);
+
+        if ($config instanceof SystemConfig) {
+            $config->setValue($value);
+        } else {
+            $config = new SystemConfig($key, $value);
+        }
+        $this->save($config);
+    }
+}

src/Service/Config/AppName.php

@@ -0,0 +1,22 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Service\Config;
+
+use App\Entity\SystemConfig;
+use App\Enum\SystemSettingKey;
+use App\Service\ConfigurationService;
+use Stringable;
+
+final readonly class AppName implements Stringable
+{
+    public function __construct(
+        private ConfigurationService $configService,
+    ) {}
+
+    public function __toString(): string
+    {
+        return $this->configService->getConfigValue(SystemSettingKey::SYSTEM_NAME, SystemConfig::DEFAULT_SYSTEM_NAME);
+    }
+}

src/Service/Config/LowStockMultiplier.php

@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Service\Config;
+
+use App\Entity\SystemConfig;
+use App\Enum\SystemSettingKey;
+use App\Service\ConfigurationService;
+
+final readonly class LowStockMultiplier
+{
+    public function __construct(
+        private ConfigurationService $configService,
+    ) {}
+
+    public function getValue(): float
+    {
+        $value = $this->configService->getConfigValue(
+            SystemSettingKey::STOCK_LOW_MULTIPLIER,
+            SystemConfig::DEFAULT_STOCK_LOW_MULTIPLIER,
+        );
+
+        return (float) $value;
+    }
+}

src/Service/ConfigurationService.php

@@ -0,0 +1,76 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Service;
+
+use App\Entity\SystemConfig;
+use App\Enum\SystemSettingKey;
+use App\Repository\SystemConfigRepository;
+use InvalidArgumentException;
+
+readonly class ConfigurationService
+{
+    public function __construct(
+        private SystemConfigRepository $systemConfigRepository,
+    ) {}
+
+    /**
+     * Get all configuration entries
+     *
+     * @return SystemConfig[]
+     */
+    public function getAllConfigs(): array
+    {
+        return $this->systemConfigRepository->findAll();
+    }
+
+    public function getConfigValue(SystemSettingKey $key, string $default = ''): string
+    {
+        return $this->systemConfigRepository->getValue($key, $default);
+    }
+
+    public function setConfigValue(SystemSettingKey $key, string $value): void
+    {
+        $this->systemConfigRepository->setValue($key, $value);
+    }
+
+    public function getConfigByKey(SystemSettingKey $key): SystemConfig
+    {
+        return $this->systemConfigRepository->findByKey($key);
+    }
+
+    public function createConfig(SystemSettingKey $key, string $value): SystemConfig
+    {
+        if ($this->systemConfigRepository->findByKey($key) instanceof SystemConfig) {
+            throw new InvalidArgumentException("A configuration with the key '{$key->value}' already exists");
+        }
+
+        $config = new SystemConfig($key, $value);
+        $this->systemConfigRepository->save($config);
+
+        return $config;
+    }
+
+    public function updateConfig(SystemConfig $config, string $value): SystemConfig
+    {
+        if ($value !== '') {
+            $config->setValue($value);
+        }
+        $this->systemConfigRepository->save($config);
+
+        return $config;
+    }
+
+    public function resetAllConfigs(): void
+    {
+        foreach (SystemSettingKey::cases() as $key) {
+            $this->setDefaultValue($key);
+        }
+    }
+
+    public function setDefaultValue(SystemSettingKey $key): void
+    {
+        $this->setConfigValue($key, SystemSettingKey::getDefaultValue($key));
+    }
+}

src/Service/DrinkTypeService.php

@@ -0,0 +1,141 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Service;
+
+use App\Entity\DrinkType;
+use App\Enum\SystemSettingKey;
+use App\Repository\DrinkTypeRepository;
+use InvalidArgumentException;
+
+readonly class DrinkTypeService
+{
+    public function __construct(
+        private DrinkTypeRepository $drinkTypeRepository,
+        private ConfigurationService $configService,
+    ) {}
+
+    /**
+     * Get all drink types
+     *
+     * @return DrinkType[]
+     */
+    public function getAllDrinkTypes(): array
+    {
+        return $this->drinkTypeRepository->findAll();
+    }
+
+    /**
+     * Get a drink type by ID
+     *
+     * @param int $id
+     * @return DrinkType|null
+     */
+    public function getDrinkTypeById(int $id): null|DrinkType
+    {
+        return $this->drinkTypeRepository->find($id);
+    }
+
+    /**
+     * Get a drink type by name
+     *
+     * @param string $name
+     * @return DrinkType|null
+     */
+    public function getDrinkTypeByName(string $name): null|DrinkType
+    {
+        return $this->drinkTypeRepository->findOneBy([
+            'name' => $name,
+        ]);
+    }
+
+    /**
+     * Create a new drink type
+     *
+     * @param string $name
+     * @param string|null $description
+     * @param int|null $desiredStock
+     * @return DrinkType
+     * @throws InvalidArgumentException If a drink type with the same name already exists
+     */
+    public function createDrinkType(
+        string $name,
+        null|string $description = null,
+        null|int $desiredStock = null,
+    ): DrinkType {
+        // Check if a drink type with the same name already exists
+        if (
+            $this->drinkTypeRepository->findOneBy([
+                'name' => $name,
+            ]) !== null
+        ) {
+            throw new InvalidArgumentException("A drink type with the name '{$name}' already exists");
+        }
+
+        // If no desired stock is provided, use the default from configuration
+        if ($desiredStock === null) {
+            $desiredStock = (int) $this->configService->getConfigByKey(SystemSettingKey::DEFAULT_DESIRED_STOCK);
+        }
+
+        $drinkType = new DrinkType($name, $description, $desiredStock);
+        $this->drinkTypeRepository->save($drinkType);
+
+        return $drinkType;
+    }
+
+    /**
+     * Update an existing drink type
+     *
+     * @param DrinkType $drinkType
+     * @param string|null $name
+     * @param string|null $description
+     * @param int|null $desiredStock
+     * @return DrinkType
+     * @throws InvalidArgumentException If a drink type with the same name already exists
+     */
+    public function updateDrinkType(
+        DrinkType $drinkType,
+        null|string $name = null,
+        null|string $description = null,
+        null|int $desiredStock = null,
+    ): DrinkType {
+        // Update name if provided
+        if ($name !== null && $name !== $drinkType->getName()) {
+            // Check if a drink type with the same name already exists
+            if (
+                $this->drinkTypeRepository->findOneBy([
+                    'name' => $name,
+                ]) !== null
+            ) {
+                throw new InvalidArgumentException("A drink type with the name '{$name}' already exists");
+            }
+            $drinkType->setName($name);
+        }
+
+        // Update description if provided
+        if ($description !== null) {
+            $drinkType->setDescription($description);
+        }
+
+        // Update desired stock if provided
+        if ($desiredStock !== null) {
+            $drinkType->setDesiredStock($desiredStock);
+        }
+
+        $this->drinkTypeRepository->save($drinkType);
+
+        return $drinkType;
+    }
+
+    /**
+     * Delete a drink type
+     *
+     * @param DrinkType $drinkType
+     * @return void
+     */
+    public function deleteDrinkType(DrinkType $drinkType): void
+    {
+        $this->drinkTypeRepository->remove($drinkType);
+    }
+}

src/Service/InventoryService.php

@@ -0,0 +1,119 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Service;
+
+use App\Entity\DrinkType;
+use App\Entity\InventoryRecord;
+use App\Repository\DrinkTypeRepository;
+use App\Repository\InventoryRecordRepository;
+use App\Service\Config\LowStockMultiplier;
+use App\ValueObject\DrinkStock;
+use DateTimeImmutable;
+
+readonly class InventoryService
+{
+    public function __construct(
+        private InventoryRecordRepository $inventoryRecordRepository,
+        private DrinkTypeRepository $drinkTypeRepository,
+        private LowStockMultiplier $lowStockMultiplier,
+    ) {}
+
+    /**
+     * Get all inventory records
+     *
+     * @return InventoryRecord[]
+     */
+    public function getAllInventoryRecords(): array
+    {
+        return $this->inventoryRecordRepository->findAll();
+    }
+
+    /**
+     * Get inventory records for a specific drink type
+     *
+     * @param DrinkType $drinkType
+     * @return InventoryRecord[]
+     */
+    public function getInventoryRecordsByDrinkType(DrinkType $drinkType): array
+    {
+        return $this->inventoryRecordRepository->findByDrinkType($drinkType);
+    }
+
+    /**
+     * Get the latest inventory record for a specific drink type
+     *
+     * @param DrinkType $drinkType
+     * @return InventoryRecord
+     */
+    public function getLatestInventoryRecord(DrinkType $drinkType): InventoryRecord
+    {
+        $record = $this->inventoryRecordRepository->findLatestByDrinkType($drinkType);
+        if (!($record instanceof InventoryRecord)) {
+            return new InventoryRecord($drinkType, 0);
+        }
+        return $record;
+    }
+
+
+
+    /**
+     * Get the current stock level for a specific drink type
+     *
+     * @param DrinkType $drinkType
+     * @return int
+     */
+    public function getCurrentStockLevel(DrinkType $drinkType): int
+    {
+        $latestRecord = $this->getLatestInventoryRecord($drinkType);
+        return ($latestRecord instanceof InventoryRecord) ? $latestRecord->getQuantity() : 0;
+    }
+
+    /**
+     * Update the stock level for a specific drink type
+     *
+     * @param DrinkType $drinkType
+     * @param int $quantity
+     * @param DateTimeImmutable|null $timestamp
+     * @return InventoryRecord
+     */
+    public function updateStockLevel(
+        DrinkType $drinkType,
+        int $quantity,
+        DateTimeImmutable $timestamp = new DateTimeImmutable(),
+    ): InventoryRecord {
+        $inventoryRecord = new InventoryRecord($drinkType, $quantity, $timestamp);
+
+        $this->inventoryRecordRepository->save($inventoryRecord);
+
+        return $inventoryRecord;
+    }
+
+    /**
+     * @return InventoryRecord[]
+     */
+    public function getAllDrinkTypesWithStockLevels(bool $includeZeroDesiredStock = false): array
+    {
+        if ($includeZeroDesiredStock) {
+            $drinkTypes = $this->drinkTypeRepository->findAll();
+        } else {
+            $drinkTypes = $this->drinkTypeRepository->findDesired();
+        }
+        $result = [];
+
+        foreach ($drinkTypes as $drinkType) {
+            $result[] = $this->getDrinkStock($drinkType);
+        }
+
+        return $result;
+    }
+
+    public function getDrinkStock(DrinkType $drinkType): DrinkStock
+    {
+        return DrinkStock::fromInventoryRecord(
+            $this->getLatestInventoryRecord($drinkType),
+            $this->lowStockMultiplier->getValue(),
+        );
+    }
+}

src/Service/OrderService.php

@@ -0,0 +1,237 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Service;
+
+use App\Entity\DrinkType;
+use App\Entity\Order;
+use App\Entity\OrderItem;
+use App\Enum\OrderStatus;
+use App\Repository\DrinkTypeRepository;
+use App\Repository\OrderItemRepository;
+use App\Repository\OrderRepository;
+use DateTimeImmutable;
+use InvalidArgumentException;
+
+readonly class OrderService
+{
+    public function __construct(
+        private OrderRepository $orderRepository,
+        private OrderItemRepository $orderItemRepository,
+        private DrinkTypeRepository $drinkTypeRepository,
+        private InventoryService $inventoryService,
+    ) {}
+
+    /**
+     * Get all orders
+     *
+     * @return Order[]
+     */
+    public function getAllOrders(): array
+    {
+        return $this->orderRepository->findAll();
+    }
+
+    /**
+     * Get an order by ID
+     *
+     * @param int $id
+     * @return Order|null
+     */
+    public function getOrderById(int $id): null|Order
+    {
+        return $this->orderRepository->find($id);
+    }
+
+    /**
+     * Get orders by status
+     *
+     * @return Order[]
+     */
+    public function getOrdersByStatus(OrderStatus $status): array
+    {
+        return $this->orderRepository->findByStatus($status);
+    }
+
+    public function getActiveOrders(): array
+    {
+        return $this->orderRepository->findByMultipleStatus([
+            OrderStatus::NEW,
+            OrderStatus::ORDERED,
+            OrderStatus::IN_WORK,
+        ]);
+    }
+
+    /**
+     * Get the most recent order in "new" or "in work" status
+     *
+     * @return Order|null
+     */
+    public function getMostRecentActiveOrder(): null|Order
+    {
+        $newOrders = $this->orderRepository->findByStatus(OrderStatus::NEW);
+        $inWorkOrders = $this->orderRepository->findByStatus(OrderStatus::IN_WORK);
+
+        $activeOrders = array_merge($newOrders, $inWorkOrders);
+
+        // Sort by creation date (newest first)
+        usort($activeOrders, fn(Order $a, Order $b): int => $b->getCreatedAt() <=> $a->getCreatedAt());
+
+        return $activeOrders[0] ?? null;
+    }
+
+    /**
+     * Check if there are any orders in "new" or "in work" status
+     *
+     * @return bool
+     */
+    public function hasActiveOrders(): bool
+    {
+        $newOrders = $this->orderRepository->findByStatus(OrderStatus::NEW);
+        $inWorkOrders = $this->orderRepository->findByStatus(OrderStatus::IN_WORK);
+
+        return $newOrders !== [] || $inWorkOrders !== [];
+    }
+
+    /**
+     * Get orders within a specific date range
+     *
+     * @param DateTimeImmutable $start
+     * @param DateTimeImmutable $end
+     * @return Order[]
+     */
+    public function getOrdersByDateRange(DateTimeImmutable $start, DateTimeImmutable $end): array
+    {
+        return $this->orderRepository->findByDateRange($start, $end);
+    }
+
+    /**
+     * Create a new order
+     *
+     * @param array<int, array{drinkTypeId: int, quantity: int}> $items
+     * @return Order
+     * @throws InvalidArgumentException If a drink type ID is invalid
+     */
+    public function createOrder(array $items): Order
+    {
+        $order = new Order();
+        $this->orderRepository->save($order);
+
+        foreach ($items as $item) {
+            $drinkType = $this->drinkTypeRepository->find($item['drinkTypeId']);
+            if ($drinkType === null) {
+                throw new InvalidArgumentException("Invalid drink type ID: {$item['drinkTypeId']}");
+            }
+
+            $orderItem = new OrderItem($drinkType, $item['quantity'], $order);
+            $this->orderItemRepository->save($orderItem);
+        }
+
+        return $order;
+    }
+
+    /**
+     * Create an order based on current stock levels
+     *
+     * @return Order
+     */
+    public function createOrderFromStockLevels(): Order
+    {
+        $lowStockItems = $this->inventoryService->getAllDrinkTypesWithStockLevels();
+        $orderItems = [];
+
+        foreach ($lowStockItems as $item) {
+            if ($item['currentStock'] < $item['desiredStock']) {
+                $orderItems[] = [
+                    'drinkTypeId' => $item['drinkType']->getId(),
+                    'quantity' => $item['desiredStock'] - $item['currentStock'],
+                ];
+            }
+        }
+
+        return $this->createOrder($orderItems);
+    }
+
+    /**
+     * Update an order's status
+     *
+     * @return Order
+     * @throws InvalidArgumentException If the status is invalid
+     */
+    public function updateOrderStatus(Order $order, OrderStatus $status): Order
+    {
+        $order->setStatus($status);
+        $this->orderRepository->save($order);
+
+        return $order;
+    }
+
+    /**
+     * Add an item to an order
+     *
+     * @param Order $order
+     * @param DrinkType $drinkType
+     * @param int $quantity
+     * @return OrderItem
+     * @throws InvalidArgumentException If the order is not in 'new' or 'in_work' status
+     */
+    public function addOrderItem(Order $order, DrinkType $drinkType, int $quantity): OrderItem
+    {
+        if (!in_array($order->getStatus(), [OrderStatus::STATUS_NEW, OrderStatus::STATUS_IN_WORK], true)) {
+            throw new InvalidArgumentException(
+                "Cannot add items to an order with status '{$order->getStatus()->value}'",
+            );
+        }
+
+        // Check if the order already has an item for this drink type
+        $existingItem = $this->orderItemRepository->findByOrderAndDrinkType($order, $drinkType);
+
+        if ($existingItem instanceof OrderItem) {
+            // Update the existing item
+            $existingItem->setQuantity($existingItem->getQuantity() + $quantity);
+            $this->orderItemRepository->save($existingItem);
+            return $existingItem;
+        }
+        // Create a new item
+        $orderItem = new OrderItem($drinkType, $quantity, $order);
+        $this->orderItemRepository->save($orderItem);
+        return $orderItem;
+    }
+
+    /**
+     * Remove an item from an order
+     *
+     * @param Order $order
+     * @param OrderItem $orderItem
+     * @return void
+     * @throws InvalidArgumentException If the order is not in 'new' or 'in_work' status
+     */
+    public function removeOrderItem(Order $order, OrderItem $orderItem): void
+    {
+        if (!in_array($order->getStatus(), [OrderStatus::STATUS_NEW, OrderStatus::STATUS_IN_WORK], true)) {
+            throw new InvalidArgumentException(
+                "Cannot remove items from an order with status '{$order->getStatus()->value}'",
+            );
+        }
+
+        $order->removeOrderItem($orderItem);
+        $this->orderItemRepository->remove($orderItem);
+    }
+
+    /**
+     * Delete an order
+     *
+     * @param Order $order
+     * @return void
+     * @throws InvalidArgumentException If the order is not in 'new' status
+     */
+    public function deleteOrder(Order $order): void
+    {
+        if ($order->getStatus() !== OrderStatus::NEW && $order->getStatus() !== OrderStatus::IN_WORK) {
+            throw new InvalidArgumentException("Cannot delete an order with status '{$order->getStatus()->value}'");
+        }
+
+        $this->orderRepository->remove($order);
+    }
+}

src/Service/StockAdjustmentService.php

@@ -0,0 +1,124 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Service;
+
+use App\Entity\DrinkType;
+use App\Enum\SystemSettingKey;
+use App\Repository\DrinkTypeRepository;
+use App\Repository\InventoryRecordRepository;
+use App\Repository\OrderRepository;
+use App\Repository\SystemConfigRepository;
+use App\ValueObject\StockAdjustmentProposal;
+
+readonly class StockAdjustmentService
+{
+    public function __construct(
+        private DrinkTypeRepository $drinkTypeRepository,
+        private InventoryRecordRepository $inventoryRecordRepository,
+        private OrderRepository $orderRepository,
+        private SystemConfigRepository $systemConfigRepository,
+    ) {}
+
+    /**
+     * Proposes adjusted stock levels for all drink types
+     *
+     * @return array<int, StockAdjustmentProposal> Array of stock adjustment proposals
+     */
+    public function proposeStockAdjustments(): array
+    {
+        $drinkTypes = $this->drinkTypeRepository->findAll();
+        $proposals = [];
+
+        foreach ($drinkTypes as $drinkType) {
+            $proposals[] = $this->proposeStockAdjustmentForDrinkType($drinkType);
+        }
+
+        return $proposals;
+    }
+
+    /**
+     * Proposes an adjusted stock level for a specific drink type
+     */
+    public function proposeStockAdjustmentForDrinkType(DrinkType $drinkType): StockAdjustmentProposal
+    {
+        $currentDesiredStock = $drinkType->getDesiredStock();
+        $lookbackOrders =
+            (int) $this->systemConfigRepository->getValue(SystemSettingKey::STOCK_ADJUSTMENT_LOOKBACK_ORDERS);
+        $increaseAmount = (int) $this->systemConfigRepository->getValue(SystemSettingKey::STOCK_INCREASE_AMOUNT);
+        $decreaseAmount = (int) $this->systemConfigRepository->getValue(SystemSettingKey::STOCK_DECREASE_AMOUNT);
+
+        // Get the last N orders for this drink type
+        $lastOrders = $this->orderRepository->findLastOrdersForDrinkType($drinkType, $lookbackOrders);
+
+        // If there are no orders, return the current desired stock
+        if ($lastOrders === []) {
+            return new StockAdjustmentProposal($drinkType, $currentDesiredStock);
+        }
+
+        // Check if stock was 0 in the last order
+        $lastOrder = $lastOrders[0];
+        $lastOrderItems = $lastOrder->getOrderItems();
+        $stockWasZeroInLastOrder = false;
+
+        foreach ($lastOrderItems as $orderItem) {
+            if ($orderItem->getDrinkType()->getId() === $drinkType->getId()) {
+                // Find the inventory record closest to the order creation date
+                $inventoryRecords = $this->inventoryRecordRepository->findByDrinkType($drinkType);
+                foreach ($inventoryRecords as $record) {
+                    if ($record->getTimestamp() <= $lastOrder->getCreatedAt()) {
+                        if ($record->getQuantity() === 0) {
+                            $stockWasZeroInLastOrder = true;
+                        }
+                        break;
+                    }
+                }
+                break;
+            }
+        }
+
+        // If stock was 0 in the last order, increase desired stock
+        if ($stockWasZeroInLastOrder) {
+            return new StockAdjustmentProposal($drinkType, $currentDesiredStock + $increaseAmount);
+        }
+
+        // Check if stock was above zero in all lookback orders
+        $stockWasAboveZeroInAllOrders = true;
+        $ordersToCheck = min(count($lastOrders), $lookbackOrders);
+
+        for ($i = 0; $i < $ordersToCheck; $i++) {
+            $order = $lastOrders[$i];
+            $orderItems = $order->getOrderItems();
+
+            foreach ($orderItems as $orderItem) {
+                if ($orderItem->getDrinkType()->getId() === $drinkType->getId()) {
+                    // Find the inventory record closest to the order creation date
+                    $inventoryRecords = $this->inventoryRecordRepository->findByDrinkType($drinkType);
+                    foreach ($inventoryRecords as $record) {
+                        if ($record->getTimestamp() <= $order->getCreatedAt()) {
+                            if ($record->getQuantity() === 0) {
+                                $stockWasAboveZeroInAllOrders = false;
+                            }
+                            break;
+                        }
+                    }
+                    break;
+                }
+            }
+
+            if (!$stockWasAboveZeroInAllOrders) {
+                break;
+            }
+        }
+
+        // If stock was above zero in all lookback orders, decrease desired stock
+        if ($stockWasAboveZeroInAllOrders && $ordersToCheck === $lookbackOrders) {
+            $proposedStock = max(0, $currentDesiredStock - $decreaseAmount);
+            return new StockAdjustmentProposal($drinkType, $proposedStock);
+        }
+
+        // Otherwise, keep the current desired stock
+        return new StockAdjustmentProposal($drinkType, $currentDesiredStock);
+    }
+}

src/ValueObject/DrinkStock.php

@@ -0,0 +1,31 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\ValueObject;
+
+use App\Entity\InventoryRecord;
+use App\Enum\StockState;
+
+final readonly class DrinkStock
+{
+    public function __construct(
+        public InventoryRecord $record,
+        public StockState $stock,
+    ) {}
+
+    public static function fromInventoryRecord(InventoryRecord $record, float $lowStockMultiplier): self
+    {
+        if ($record->getQuantity() === 0 && $record->getDrinkType()->getDesiredStock() > 0) {
+            return new self($record, StockState::CRITICAL);
+        }
+        if ($record->getQuantity() < ($record->getDrinkType()->getDesiredStock() * $lowStockMultiplier)) {
+            return new self($record, StockState::LOW);
+        }
+        if ($record->getQuantity() > $record->getDrinkType()->getDesiredStock()) {
+            return new self($record, StockState::HIGH);
+        }
+
+        return new self($record, StockState::NORMAL);
+    }
+}

symfony.lock

@@ -1,4 +1,52 @@
 {
+    "doctrine/deprecations": {
+        "version": "1.1",
+        "recipe": {
+            "repo": "github.com/symfony/recipes",
+            "branch": "main",
+            "version": "1.0",
+            "ref": "87424683adc81d7dc305eefec1fced883084aab9"
+        }
+    },
+    "doctrine/doctrine-bundle": {
+        "version": "2.14",
+        "recipe": {
+            "repo": "github.com/symfony/recipes",
+            "branch": "main",
+            "version": "2.13",
+            "ref": "620b57f496f2e599a6015a9fa222c2ee0a32adcb"
+        },
+        "files": [
+            "config/packages/doctrine.yaml",
+            "src/Entity/.gitignore",
+            "src/Repository/.gitignore"
+        ]
+    },
+    "doctrine/doctrine-migrations-bundle": {
+        "version": "3.4",
+        "recipe": {
+            "repo": "github.com/symfony/recipes",
+            "branch": "main",
+            "version": "3.1",
+            "ref": "1d01ec03c6ecbd67c3375c5478c9a423ae5d6a33"
+        },
+        "files": [
+            "config/packages/doctrine_migrations.yaml",
+            "migrations/.gitignore"
+        ]
+    },
+    "phpstan/phpstan": {
+        "version": "2.1",
+        "recipe": {
+            "repo": "github.com/symfony/recipes-contrib",
+            "branch": "main",
+            "version": "1.0",
+            "ref": "5e490cc197fb6bb1ae22e5abbc531ddc633b6767"
+        },
+        "files": [
+            "phpstan.dist.neon"
+        ]
+    },
     "symfony/console": {
         "version": "7.3",
         "recipe": {
@@ -24,6 +72,18 @@
             ".env.dev"
         ]
     },
+    "symfony/form": {
+        "version": "7.3",
+        "recipe": {
+            "repo": "github.com/symfony/recipes",
+            "branch": "main",
+            "version": "7.2",
+            "ref": "7d86a6723f4a623f59e2bf966b6aad2fc461d36b"
+        },
+        "files": [
+            "config/packages/csrf.yaml"
+        ]
+    },
     "symfony/framework-bundle": {
         "version": "7.3",
         "recipe": {
@@ -44,6 +104,27 @@
             ".editorconfig"
         ]
     },
+    "symfony/maker-bundle": {
+        "version": "1.63",
+        "recipe": {
+            "repo": "github.com/symfony/recipes",
+            "branch": "main",
+            "version": "1.0",
+            "ref": "fadbfe33303a76e25cb63401050439aa9b1a9c7f"
+        }
+    },
+    "symfony/property-info": {
+        "version": "7.3",
+        "recipe": {
+            "repo": "github.com/symfony/recipes",
+            "branch": "main",
+            "version": "7.3",
+            "ref": "dae70df71978ae9226ae915ffd5fad817f5ca1f7"
+        },
+        "files": [
+            "config/packages/property_info.yaml"
+        ]
+    },
     "symfony/routing": {
         "version": "7.3",
         "recipe": {
@@ -56,5 +137,43 @@
             "config/packages/routing.yaml",
             "config/routes.yaml"
         ]
+    },
+    "symfony/twig-bundle": {
+        "version": "7.3",
+        "recipe": {
+            "repo": "github.com/symfony/recipes",
+            "branch": "main",
+            "version": "6.4",
+            "ref": "cab5fd2a13a45c266d45a7d9337e28dee6272877"
+        },
+        "files": [
+            "config/packages/twig.yaml",
+            "templates/base.html.twig"
+        ]
+    },
+    "symfony/validator": {
+        "version": "7.3",
+        "recipe": {
+            "repo": "github.com/symfony/recipes",
+            "branch": "main",
+            "version": "7.0",
+            "ref": "8c1c4e28d26a124b0bb273f537ca8ce443472bfd"
+        },
+        "files": [
+            "config/packages/validator.yaml"
+        ]
+    },
+    "symfony/web-profiler-bundle": {
+        "version": "7.3",
+        "recipe": {
+            "repo": "github.com/symfony/recipes",
+            "branch": "main",
+            "version": "7.3",
+            "ref": "5b2b543e13942495c0003f67780cb4448af9e606"
+        },
+        "files": [
+            "config/packages/web_profiler.yaml",
+            "config/routes/web_profiler.yaml"
+        ]
     }
 }

templates/base.html.twig

@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <meta charset="UTF-8">
+        <meta name="viewport" content="width=device-width, initial-scale=1">
+        <title>{% block title %}Welcome!{% endblock %}</title>
+        {% block stylesheets %}
+            <link rel="stylesheet" href="/assets/css/bootstrap.min.css">
+            <link rel="stylesheet" href="/assets/css/styles.css">
+        {% endblock %}
+
+        {% block javascripts %}
+            <script src="/assets/js/app.js"></script>
+            <script src="/assets/js/bootstrap.bundle.min.js"></script>
+        {% endblock %}
+    </head>
+    <body>
+    <nav class="navbar navbar-expand-lg navbar-light bg-light">
+        <div class="container-fluid">
+            <a class="navbar-brand" href="/">{{ appName }}</a>
+            <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarNav"
+                    aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">
+                <span class="navbar-toggler-icon"></span>
+            </button>
+            <div class="collapse navbar-collapse" id="navbarNav">
+                <ul class="navbar-nav">
+                    <li class="nav-item">
+                        <a class="nav-link active" aria-current="page" href="/">Home</a>
+                    </li>
+                </ul>
+            </div>
+        </div>
+    </nav>
+    <div class="container mt-4">
+        {% block body %}{% endblock %}
+    </div>
+    </body>
+</html>

templates/drink_type/_delete_form.html.twig

@@ -0,0 +1,4 @@
+<form method="post" action="{{ path('app_drink_type_delete', {'id': drink_type.id}) }}" onsubmit="return confirm('Are you sure you want to delete this item?');">
+    <input type="hidden" name="_token" value="{{ csrf_token('delete' ~ drink_type.id) }}">
+    <button class="btn">Delete</button>
+</form>

templates/drink_type/_form.html.twig

@@ -0,0 +1,4 @@
+{{ form_start(form) }}
+    {{ form_widget(form) }}
+    <button class="btn">{{ button_label|default('Save') }}</button>
+{{ form_end(form) }}

templates/drink_type/edit.html.twig

@@ -0,0 +1,13 @@
+{% extends 'base.html.twig' %}
+
+{% block title %}Edit DrinkType{% endblock %}
+
+{% block body %}
+    <h1>Edit DrinkType</h1>
+
+    {{ include('drink_type/_form.html.twig', {'button_label': 'Update'}) }}
+
+    <a href="{{ path('app_drink_type_index') }}">back to list</a>
+
+    {{ include('drink_type/_delete_form.html.twig') }}
+{% endblock %}

templates/drink_type/index.html.twig

@@ -0,0 +1,46 @@
+{% extends 'base.html.twig' %}
+
+{% block title %}DrinkType index{% endblock %}
+
+{% block body %}
+    <h1>DrinkType index</h1>
+
+    <table class="table">
+        <thead>
+            <tr>
+                <th>Id</th>
+                <th>CreatedAt</th>
+                <th>UpdatedAt</th>
+                <th>Name</th>
+                <th>Description</th>
+                <th>DesiredStock</th>
+                <th>DrinkStock</th>
+                <th>actions</th>
+            </tr>
+        </thead>
+        <tbody>
+        {% for drink_stock in drink_stocks %}
+            {% set drink_type = drink_stock.record.drinkType %}
+            <tr>
+                <td>{{ drink_type.id }}</td>
+                <td>{{ drink_type.createdAt ? drink_type.createdAt|date('Y-m-d H:i:s') : '' }}</td>
+                <td>{{ drink_type.updatedAt ? drink_type.updatedAt|date('Y-m-d H:i:s') : '' }}</td>
+                <td>{{ drink_type.name }}</td>
+                <td>{{ drink_type.description }}</td>
+                <td>{{ drink_type.desiredStock }}</td>
+                <td>{{ drink_stock.record.quantity }}</td>
+                <td>
+                    <a href="{{ path('app_drink_type_show', {'id': drink_type.id}) }}">show</a>
+                    <a href="{{ path('app_drink_type_edit', {'id': drink_type.id}) }}">edit</a>
+                </td>
+            </tr>
+        {% else %}
+            <tr>
+                <td colspan="7">no records found</td>
+            </tr>
+        {% endfor %}
+        </tbody>
+    </table>
+
+    <a href="{{ path('app_drink_type_new') }}">Create new</a>
+{% endblock %}

templates/drink_type/new.html.twig

@@ -0,0 +1,11 @@
+{% extends 'base.html.twig' %}
+
+{% block title %}New DrinkType{% endblock %}
+
+{% block body %}
+    <h1>Create new DrinkType</h1>
+
+    {{ include('drink_type/_form.html.twig') }}
+
+    <a href="{{ path('app_drink_type_index') }}">back to list</a>
+{% endblock %}

templates/drink_type/show.html.twig

@@ -0,0 +1,42 @@
+{% extends 'base.html.twig' %}
+
+{% block title %}DrinkType{% endblock %}
+
+{% block body %}
+    <h1>DrinkType</h1>
+
+    <table class="table">
+        <tbody>
+            <tr>
+                <th>Id</th>
+                <td>{{ drink_type.id }}</td>
+            </tr>
+            <tr>
+                <th>CreatedAt</th>
+                <td>{{ drink_type.createdAt ? drink_type.createdAt|date('Y-m-d H:i:s') : '' }}</td>
+            </tr>
+            <tr>
+                <th>UpdatedAt</th>
+                <td>{{ drink_type.updatedAt ? drink_type.updatedAt|date('Y-m-d H:i:s') : '' }}</td>
+            </tr>
+            <tr>
+                <th>Name</th>
+                <td>{{ drink_type.name }}</td>
+            </tr>
+            <tr>
+                <th>Description</th>
+                <td>{{ drink_type.description }}</td>
+            </tr>
+            <tr>
+                <th>DesiredStock</th>
+                <td>{{ drink_type.desiredStock }}</td>
+            </tr>
+        </tbody>
+    </table>
+
+    <a href="{{ path('app_drink_type_index') }}">back to list</a>
+
+    <a href="{{ path('app_drink_type_edit', {'id': drink_type.id}) }}">edit</a>
+
+    {{ include('drink_type/_delete_form.html.twig') }}
+{% endblock %}

templates/index.html.twig

@@ -0,0 +1,50 @@
+{% extends 'base.html.twig' %}
+
+{% block title %}Inventory Overview{% endblock %}
+
+{% block body %}
+    <div class="container">
+        <h1>Drink Inventory</h1>
+        <div class="card">
+            <div class="card-header">
+                <h5 class="card-title">Drink Inventory Overview</h5>
+            </div>
+            <div class="card-body">
+                <table class="table table-striped">
+                    <thead>
+                    <tr>
+                        <th>Drink Name</th>
+                        <th>Current Stock</th>
+                        <th>Desired Stock</th>
+                        <th>Status</th>
+                        <th>Description</th>
+                    </tr>
+                    </thead>
+                    <tbody>
+                    {% for drinkStock in drinkStocks %}
+                        {% set rowClass = '' %}
+                        {% if drinkStock.stock.value == 'critical' %}
+                            {% set rowClass = 'table-danger' %}
+                        {% elseif drinkStock.stock.value == 'low' %}
+                            {% set rowClass = 'table-warning' %}
+                        {% elseif drinkStock.stock.value == 'high' %}
+                            {% set rowClass = 'table-success' %}
+                        {% endif %}
+                        <tr class="{{ rowClass }}">
+                            <td>{{ drinkStock.record.drinkType.name }}</td>
+                            <td>{{ drinkStock.record.quantity }}</td>
+                            <td>{{ drinkStock.record.drinkType.desiredStock }}</td>
+                            <td>{{ drinkStock.stock.value|capitalize }}</td>
+                            <td>{{ drinkStock.record.drinkType.description }}</td>
+                        </tr>
+                    {% endfor %}
+                    </tbody>
+                </table>
+                <div class="mt-3">
+                    <a href="{{ path('app_drink_type_index') }}" class="btn btn-primary">View All Drinks</a>
+                </div>
+
+            </div>
+        </div>
+    </div>
+{% endblock %}