add conditional validator to allow more flexible configuration

Classes/Validation/Validator/ConditionalValidator.php

@@ -0,0 +1,152 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DigiComp\SettingValidator\Validation\Validator;
+
+/*
+ * This file is part of the DigiComp.SettingValidator package.
+ *
+ * (c) digital competence
+ *
+ * This package is Open Source Software. For the full copyright and license
+ * information, please view the LICENSE file which was distributed with this
+ * source code.
+ */
+
+use Neos\Eel\EelEvaluatorInterface;
+use Neos\Eel\Exception as NeosEelException;
+use Neos\Eel\Utility;
+use Neos\Flow\Annotations as Flow;
+use Neos\Flow\ObjectManagement\DependencyInjection\DependencyProxy;
+use Neos\Flow\Validation\Exception\InvalidValidationConfigurationException;
+use Neos\Flow\Validation\Exception\NoSuchValidatorException;
+use Neos\Flow\Validation\Validator\AbstractValidator;
+use Neos\Flow\Validation\ValidatorResolver;
+
+class ConditionalValidator extends AbstractValidator
+{
+    /**
+     * @Flow\Inject
+     * @var EelEvaluatorInterface
+     */
+    protected $eelEvaluator;
+
+    /**
+     * @Flow\Inject
+     * @var ValidatorResolver
+     */
+    protected $validatorResolver;
+
+    /**
+     * @inheritDoc
+     */
+    protected $supportedOptions = [
+        'conditions' => [[], 'List of entries with "condition" (eel expression) and "validators" (list of validators).', 'array', true],
+        'fallbackValidators' => [[], 'List of validators that is used if no condition matched.', 'array'],
+        'validationGroups' => [['Default'], 'Same as "Validation Groups" of Flow Framework', 'array'],
+    ];
+
+    /**
+     * @inheritDoc
+     * @throws InvalidValidationConfigurationException
+     * @throws NeosEelException
+     * @throws NoSuchValidatorException
+     */
+    protected function isValid($value): void
+    {
+        $validatorConfigs = [];
+
+        $hasMatch = false;
+
+        foreach ($this->options['conditions'] as $condition) {
+            if ($this->eelEvaluator instanceof DependencyProxy) {
+                $this->eelEvaluator->_activateDependency();
+            }
+
+            if (!Utility::evaluateEelExpression($condition['condition'], $this->eelEvaluator, ['this' => $value])) {
+                continue;
+            }
+
+            $hasMatch = true;
+
+            foreach ($condition['validators'] as $validator => $options) {
+                if ($options === null) {
+                    continue;
+                }
+
+                $validatorConfigs[] = [
+                    'validator' => $validator,
+                    'options' => $options,
+                ];
+            }
+        }
+
+        if (!$hasMatch) {
+            foreach ($this->options['fallbackValidators'] as $validator => $options) {
+                if ($options === null) {
+                    continue;
+                }
+
+                $validatorConfigs[] = [
+                    'validator' => $validator,
+                    'options' => $options,
+                ];
+            }
+        }
+
+        foreach ($validatorConfigs as $validatorConfig) {
+            if (!$this->doesValidationGroupsMatch($validatorConfig)) {
+                continue;
+            }
+
+            $this->handleValidationGroups($validatorConfig);
+
+            $validator = $this->validatorResolver->createValidator(
+                $validatorConfig['validator'],
+                $validatorConfig['options']
+            );
+
+            if ($validator === null) {
+                throw new InvalidValidationConfigurationException(
+                    \sprintf(
+                        'Validator "%s" could not be resolved. Check your Validation.yaml',
+                        $validatorConfig['validator']
+                    ),
+                    1402326139
+                );
+            }
+
+            $this->getResult()->merge($validator->validate($value));
+        }
+    }
+
+    /**
+     * Check whether at least one configured group does match, if any is configured.
+     *
+     * @param array $validatorConfig
+     * @return bool
+     */
+    protected function doesValidationGroupsMatch(array $validatorConfig): bool
+    {
+        return !isset($validatorConfig['options']['validationGroups'])
+            || \array_intersect(
+                $validatorConfig['options']['validationGroups'],
+                $this->options['validationGroups']
+            ) !== [];
+    }
+
+    /**
+     * Add validation groups for recursion if necessary.
+     *
+     * @param array $validatorConfig
+     */
+    protected function handleValidationGroups(array &$validatorConfig): void
+    {
+        if ($validatorConfig['validator'] === 'DigiComp.SettingValidator:Settings') {
+            $validatorConfig['options']['validationGroups'] = $this->options['validationGroups'];
+        } elseif (isset($validatorConfig['options']['validationGroups'])) {
+            unset($validatorConfig['options']['validationGroups']);
+        }
+    }
+}