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<?php |
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namespace App\Domain\Exception; |
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use RuntimeException; |
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class ValidationException extends RuntimeException |
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{ |
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public readonly array $validationErrors; |
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public function __construct(array $validationErrors, string $message = 'Validation error') |
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{ |
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parent::__construct($message); |
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$this->validationErrors = $this->transformCakephpValidationErrorsToOutputFormat($validationErrors); |
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} |
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/** |
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* Transform the validation error output from the library to array that is used by the frontend. |
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* The changes are tiny, but the main purpose is to add an abstraction layer in case the validation |
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* library changes its error output format in the future so that only this function has to be |
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* changed instead of the frontend. |
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* |
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* In cakephp/validation 5 the error array is output in the following format: |
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* $cakeValidationErrors = [ |
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* 'field_name' => [ |
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* 'validation_rule_name' => 'Validation error message for that field', |
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* 'other_validation_rule_name' => 'Another validation error message for that field', |
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* ], |
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* 'email' => [ |
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* '_required' => 'This field is required', |
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* ], |
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* 'first_name' => [ |
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* 'minLength' => 'Minimum length is 3', |
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* ], |
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* ] |
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* |
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* This function transforms this into the format that is used by the frontend |
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* (which is roughly the same except we don't need the infringed rule name as key): |
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* $outputValidationErrors = [ |
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* 'field_name' => [ |
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* 0 => 'Validation error message for that field', |
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* 1 => 'Another validation error message for that field', |
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* ], |
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* 'email' => [ |
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* 0 => 'This field is required', |
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* ], |
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* 'first_name' => [ |
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* 0 => 'Minimum length is 3', |
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* ], |
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* ] |
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* |
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* @param array $validationErrors The cakephp validation errors |
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* |
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* @return array the transformed result in the format documented above |
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*/ |
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private function transformCakephpValidationErrorsToOutputFormat(array $validationErrors): array |
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{ |
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$validationErrorsForOutput = []; |
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foreach ($validationErrors as $fieldName => $fieldErrors) { |
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// There may be cases with multiple error messages for a single field. |
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foreach ($fieldErrors as $infringedRuleName => $infringedRuleMessage) { |
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// Output is basically the same except without the rule name as a key. |
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$validationErrorsForOutput[$fieldName][] = $infringedRuleMessage; |
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} |
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} |
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return $validationErrorsForOutput; |
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} |
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} |
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samuelgfeller /
slim-api-starter
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