From a9a466bc384bcda7a9d6b6f3e880cbfc2ba32213 Mon Sep 17 00:00:00 2001
From: Marc Wustrack <m.wustrack@basecom.de>
Date: Fri, 5 Aug 2022 13:16:17 +0200
Subject: [PATCH] Initial commit

---
 LICENSE                           | 22 +++++++++
 composer.json                     | 23 ++++++++++
 src/Constraints/Enum.php          | 28 ++++++++++++
 src/Constraints/EnumValidator.php | 74 +++++++++++++++++++++++++++++++
 4 files changed, 147 insertions(+)
 create mode 100644 LICENSE
 create mode 100644 composer.json
 create mode 100644 src/Constraints/Enum.php
 create mode 100644 src/Constraints/EnumValidator.php

diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..147c8dd
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,22 @@
+
+The MIT license
+
+Copyright (c) 2015-present Kévin Dunglas
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is furnished
+to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/composer.json b/composer.json
new file mode 100644
index 0000000..03a3dd6
--- /dev/null
+++ b/composer.json
@@ -0,0 +1,23 @@
+{
+    "name": "muffe/enum-constraint",
+    "description": "A Symfony Validator constraint that validates of given strings a valid cases in a given PHP 8 Enum",
+    "type": "library",
+    "keywords": ["enum", "validator", "constraint"],
+    "minimum-stability": "dev",
+    "license": "MIT",
+    "autoload": {
+        "psr-4": {
+            "Muffe\\EnumConstraint\\": "src/"
+        }
+    },
+    "authors": [
+        {
+            "name": "Marc Wustrack",
+            "email": "mail@wustrack.dev"
+        }
+    ],
+    "require": {
+        "php": ">=8.1",
+        "symfony/validator": "^6.1"
+    }
+}
diff --git a/src/Constraints/Enum.php b/src/Constraints/Enum.php
new file mode 100644
index 0000000..1505cbc
--- /dev/null
+++ b/src/Constraints/Enum.php
@@ -0,0 +1,28 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Muffe\EnumConstraint\Constraints;
+
+use Symfony\Component\Validator\Constraint;
+
+/**
+ * @Annotation
+ * @Target({"PROPERTY", "METHOD", "ANNOTATION"})
+ */
+#[\Attribute(\Attribute::TARGET_PROPERTY | \Attribute::TARGET_METHOD | \Attribute::IS_REPEATABLE)]
+class Enum extends Constraint
+{
+    final public const NO_SUCH_CASE_ERROR = '8e6b7234-171a-4389-a4fc-9324586a6869';
+
+    public function __construct(
+        public string $enumType,
+        public bool $multiple = false,
+        public ?string $message = null,
+        mixed $options = null,
+        array $groups = null,
+        mixed $payload = null
+    ) {
+        parent::__construct($options, $groups, $payload);
+    }
+}
diff --git a/src/Constraints/EnumValidator.php b/src/Constraints/EnumValidator.php
new file mode 100644
index 0000000..3a05d8e
--- /dev/null
+++ b/src/Constraints/EnumValidator.php
@@ -0,0 +1,74 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Muffe\EnumConstraint\Constraints;
+
+use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\ConstraintValidator;
+use Symfony\Component\Validator\Exception\UnexpectedTypeException;
+
+class EnumValidator extends ConstraintValidator
+{
+    public function validate($value, Constraint $constraint): void
+    {
+        if (!$constraint instanceof Enum) {
+            throw new UnexpectedTypeException($constraint, Enum::class);
+        }
+
+        $enumType = $constraint->enumType;
+
+        if (!\is_a($enumType, \UnitEnum::class, true)) {
+            throw new \RuntimeException('The "enumType" option of the Enum constraint should be a Enum.');
+        }
+
+        if (null === $value) {
+            return;
+        }
+
+        $property = 'name';
+        if (\is_a($enumType, \BackedEnum::class, true)) {
+            $property = 'value';
+        }
+
+        $enumCases = \array_map(static fn ($item) => $item->{$property}, $enumType::cases());
+
+        if (!$constraint->message) {
+            $constraint->message = 'The enum case "{{ value }}" is not valid. Valid cases are: "{{ choices }}"';
+        }
+
+        if ($constraint->multiple) {
+            if (!\is_array($value)) {
+                $value = [$value];
+            }
+
+            foreach ($value as $singleValue) {
+                if (\in_array($singleValue, $enumCases, true)) {
+                    continue;
+                }
+
+                $this->context->buildViolation($constraint->message)
+                    ->setParameter('{{ value }}', $this->formatValue($singleValue))
+                    ->setParameter('{{ choices }}', $this->formatValues($enumCases))
+                    ->setCode(Enum::NO_SUCH_CASE_ERROR)
+                    ->setInvalidValue($value)
+                    ->addViolation();
+
+                return;
+            }
+
+            return;
+        }
+
+        if (\in_array($value, $enumCases, true)) {
+            return;
+        }
+
+        $this->context->buildViolation($constraint->message)
+            ->setParameter('{{ value }}', $this->formatValue($value))
+            ->setParameter('{{ choices }}', $this->formatValues($enumCases))
+            ->setCode(Enum::NO_SUCH_CASE_ERROR)
+            ->setInvalidValue($value)
+            ->addViolation();
+    }
+}