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<?php |
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declare(strict_types=1); |
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namespace Yiisoft\Form\Widget\FieldPart; |
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use Yiisoft\Form\Exception\AttributeNotSetException; |
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use Yiisoft\Form\Exception\FormModelNotSetException; |
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use Yiisoft\Form\FormModelInterface; |
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use Yiisoft\Form\Helper\HtmlFormErrors; |
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use Yiisoft\Html\Tag\CustomTag; |
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use Yiisoft\Widget\Widget; |
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/** |
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* The Error widget displays an error message. |
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* |
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* @psalm-suppress MissingConstructor |
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*/ |
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final class Error extends Widget |
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{ |
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private string $attribute = ''; |
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private array $attributes = []; |
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private bool $encode = false; |
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private string $message = ''; |
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private array $messageCallback = []; |
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private string $tag = 'div'; |
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private ?FormModelInterface $formModel = null; |
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/** |
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* The HTML attributes. The following special options are recognized. |
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* |
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* @param array $values Attribute values indexed by attribute names. |
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* |
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* @return static |
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* |
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* See {@see \Yiisoft\Html\Html::renderTagAttributes()} for details on how attributes are being rendered. |
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*/ |
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public function attributes(array $values): self |
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{ |
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$new = clone $this; |
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$new->attributes = $values; |
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return $new; |
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} |
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/** |
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* Whether content should be HTML-encoded. |
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* |
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* @param bool $value |
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* |
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* @return static |
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*/ |
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public function encode(bool $value): self |
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{ |
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$new = clone $this; |
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$new->encode = $value; |
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return $new; |
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} |
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/** |
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* @return static |
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*/ |
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public function for(FormModelInterface $formModel, string $attribute): self |
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{ |
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$new = clone $this; |
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$new->formModel = $formModel; |
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$new->attribute = $attribute; |
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return $new; |
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} |
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/** |
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* Error message to display. |
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* |
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* @return static |
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*/ |
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public function message(string $value): self |
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{ |
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$new = clone $this; |
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$new->message = $value; |
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return $new; |
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} |
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/** |
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* Callback that will be called to obtain an error message. |
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* |
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* The signature of the callback must be: |
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* |
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* ```php |
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* [$FormModel, function()] |
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* ``` |
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* |
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* @param array $value |
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* |
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* @return static |
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*/ |
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public function messageCallback(array $value): self |
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{ |
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$new = clone $this; |
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$new->messageCallback = $value; |
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return $new; |
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} |
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/** |
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* The tag name of the container element. |
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* |
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* Empty to render error messages without container {@see Html::tag()}. |
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* |
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* @param string $value |
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* |
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* @return static |
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*/ |
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public function tag(string $value): self |
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{ |
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$new = clone $this; |
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$new->tag = $value; |
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return $new; |
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} |
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/** |
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* Generates a tag that contains the first validation error of the specified form attribute. |
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* |
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* @return string the generated label tag |
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*/ |
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protected function run(): string |
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{ |
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$error = HtmlFormErrors::getFirstError($this->getFormModel(), $this->getAttribute()); |
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if ($error !== '' && $this->message !== '') { |
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$error = $this->message; |
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} |
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if ($error !== '' && $this->messageCallback !== []) { |
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/** @var string */ |
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$error = call_user_func($this->messageCallback, $this->getFormModel(), $this->getAttribute()); |
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} |
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return $this->tag !== '' && $error !== '' |
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? CustomTag::name($this->tag) |
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->attributes($this->attributes) |
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->content($error) |
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->encode($this->encode) |
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->render() |
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: $error; |
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} |
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private function getAttribute(): string |
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{ |
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if ($this->attribute === '') { |
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throw new AttributeNotSetException(); |
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} |
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return $this->attribute; |
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} |
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/** |
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* Return FormModelInterface object. |
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* |
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* @return FormModelInterface |
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*/ |
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private function getFormModel(): FormModelInterface |
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{ |
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if ($this->formModel === null) { |
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throw new FormModelNotSetException(); |
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} |
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return $this->formModel; |
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} |
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} |
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