Add Twig Extensions

composer.json

@@ -31,7 +31,8 @@
     "require-dev": {
         "friendsofphp/php-cs-fixer": "^3.11",
         "phpunit/phpunit": "^9.5",
-        "slim/psr7": "^1.5"
+        "slim/psr7": "^1.5",
+        "twig/twig": "^3.5"
     },
     "config": {
         "sort-packages": true

src/Twig/LegacyValidatorExtension.php

@@ -0,0 +1,89 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the Awurth Validator package.
+ *
+ * (c) Alexis Wurth <awurth.dev@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Awurth\Validator\Twig;
+
+use Awurth\Validator\StatefulValidatorInterface;
+use Awurth\Validator\ValidationFailureInterface;
+use Twig\Extension\AbstractExtension;
+use Twig\TwigFunction;
+
+/**
+ * Validator Twig Extension.
+ *
+ * @author Alexis Wurth <awurth.dev@gmail.com>
+ */
+final class LegacyValidatorExtension extends AbstractExtension
+{
+    /**
+     * An array of names for Twig functions.
+     *
+     * @var string[]
+     */
+    private array $functionNames;
+
+    /**
+     * @param string[] $functionNames An array of names for Twig functions
+     */
+    public function __construct(private readonly StatefulValidatorInterface $validator, array $functionNames = [])
+    {
+        $this->functionNames['error'] = $functionNames['error'] ?? 'error';
+        $this->functionNames['errors'] = $functionNames['errors'] ?? 'errors';
+        $this->functionNames['has_error'] = $functionNames['has_error'] ?? 'has_error';
+        $this->functionNames['has_errors'] = $functionNames['has_errors'] ?? 'has_errors';
+    }
+
+    public function getFunctions(): array
+    {
+        return [
+            new TwigFunction($this->functionNames['error'], [$this, 'getError']),
+            new TwigFunction($this->functionNames['errors'], [$this, 'getErrors']),
+            new TwigFunction($this->functionNames['has_error'], [$this, 'hasError']),
+            new TwigFunction($this->functionNames['has_errors'], [$this, 'hasErrors']),
+        ];
+    }
+
+    public function getError(string $key, int $index = 0): ?string
+    {
+        $failures = $this->validator->getFailures()->filter(static fn (ValidationFailureInterface $failure): bool => $failure->getProperty() === $key);
+        $failure = $failures->has($index) ? $failures->get(0) : null;
+
+        return $failure?->getMessage();
+    }
+
+    /**
+     * @return string[]
+     */
+    public function getErrors(?string $key = null): array
+    {
+        $failures = null === $key
+            ? $this->validator->getFailures()
+            : $this->validator->getFailures()->filter(static fn(ValidationFailureInterface $failure) => $failure->getProperty() === $key)
+        ;
+
+        return \array_map(
+            static fn(ValidationFailureInterface $failure) => $failure->getMessage(),
+            (array)$failures,
+        );
+    }
+
+    public function hasError(string $key): bool
+    {
+        return $this->validator->getFailures()->find(static fn(ValidationFailureInterface $failure) => $failure->getProperty() === $key) !== null;
+    }
+
+    public function hasErrors(): bool
+    {
+        return $this->validator->getFailures()->count() !== 0;
+    }
+}

src/Twig/ValidatorExtension.php

@@ -0,0 +1,77 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the Awurth Validator package.
+ *
+ * (c) Alexis Wurth <awurth.dev@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Awurth\Validator\Twig;
+
+use Awurth\Validator\StatefulValidatorInterface;
+use Awurth\Validator\ValidationFailureCollectionInterface;
+use Awurth\Validator\ValidationFailureInterface;
+use Twig\Extension\AbstractExtension;
+use Twig\TwigFunction;
+
+/**
+ * Validator Twig Extension.
+ *
+ * @author Alexis Wurth <awurth.dev@gmail.com>
+ */
+final class ValidatorExtension extends AbstractExtension
+{
+    /**
+     * An array of names for Twig functions.
+     *
+     * @var string[]
+     */
+    protected array $functionNames;
+
+    /**
+     * @param string[] $functionNames An array of names for Twig functions
+     */
+    public function __construct(private readonly StatefulValidatorInterface $validator, array $functionNames = [])
+    {
+        $this->functionNames['error'] = $functionNames['error'] ?? 'error';
+        $this->functionNames['errors'] = $functionNames['errors'] ?? 'errors';
+        $this->functionNames['has_errors'] = $functionNames['has_errors'] ?? 'has_errors';
+    }
+
+    public function getFunctions(): array
+    {
+        return [
+            new TwigFunction($this->functionNames['error'], [$this, 'findFirst']),
+            new TwigFunction($this->functionNames['errors'], [$this, 'findErrors']),
+            new TwigFunction($this->functionNames['has_errors'], [$this, 'hasErrors']),
+        ];
+    }
+
+    public function findFirst(?callable $callback = null): ?ValidationFailureInterface
+    {
+        if (null === $callback) {
+            return $this->validator->getFailures()->has(0) ? $this->validator->getFailures()->get(0) : null;
+        }
+
+        return $this->validator->getFailures()->find($callback);
+    }
+
+    public function findErrors(?callable $callback = null): ValidationFailureCollectionInterface
+    {
+        if (null === $callback) {
+            return $this->validator->getFailures();
+        }
+
+        return $this->validator->getFailures()->filter($callback);
+    }
+
+    public function hasErrors(): bool
+    {
+        return $this->validator->getFailures()->count() !== 0;
+    }
+}