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<?php |
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declare(strict_types=1); |
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namespace Yiisoft\Form\Field\Part; |
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use InvalidArgumentException; |
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use Yiisoft\Form\Field\Base\FormAttributeTrait; |
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use Yiisoft\Form\ThemeContainer; |
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use Yiisoft\Html\Html; |
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use Yiisoft\Html\Tag\CustomTag; |
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use Yiisoft\Widget\Widget; |
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use function call_user_func; |
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/** |
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* Represent a field validation error (if there are several errors, the first one is used). If field is no validation |
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* error, field part will be hidden. |
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*/ |
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final class Error extends Widget |
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{ |
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use FormAttributeTrait; |
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/** |
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* @psalm-var non-empty-string |
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*/ |
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private string $tag = 'div'; |
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private array $attributes = []; |
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private bool $encode = true; |
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private ?string $message = null; |
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/** |
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* @var callable|null |
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*/ |
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private $messageCallback = null; |
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/** |
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* Set the container tag name for the error. |
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* |
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* @param string $tag Container tag name. |
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*/ |
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public function tag(string $tag): self |
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{ |
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if ($tag === '') { |
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throw new InvalidArgumentException('Tag name cannot be empty.'); |
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} |
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$new = clone $this; |
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$new->tag = $tag; |
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return $new; |
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} |
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public function attributes(array $attributes): self |
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{ |
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$new = clone $this; |
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$new->attributes = $attributes; |
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return $new; |
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} |
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public function addAttributes(array $attributes): self |
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{ |
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$new = clone $this; |
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$new->attributes = array_merge($this->attributes, $attributes); |
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return $new; |
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} |
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/** |
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* Set tag ID. |
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* |
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* @param string|null $id Tag ID. |
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*/ |
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public function id(?string $id): self |
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{ |
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$new = clone $this; |
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$new->attributes['id'] = $id; |
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return $new; |
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} |
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/** |
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* Add one or more CSS classes to the tag. |
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* |
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* @param string|null ...$class One or many CSS classes. |
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*/ |
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public function addClass(?string ...$class): self |
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{ |
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$new = clone $this; |
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Html::addCssClass( |
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$new->attributes, |
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array_filter($class, static fn ($c) => $c !== null), |
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); |
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return $new; |
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} |
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/** |
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* Replace tag CSS classes with a new set of classes. |
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* |
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* @param string|null ...$class One or many CSS classes. |
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*/ |
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public function class(?string ...$class): self |
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{ |
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$new = clone $this; |
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$new->attributes['class'] = array_filter($class, static fn ($c) => $c !== null); |
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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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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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* Error message to display. |
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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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public function messageCallback(?callable $value): self |
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{ |
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$new = clone $this; |
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$new->messageCallback = $value; |
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return $new; |
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} |
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/** |
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* Generates a tag that contains the first validation error of the specified form attribute. |
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* |
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* @return string The generated error tag. |
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*/ |
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public function render(): string |
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{ |
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$useModel = $this->hasFormModelAndAttribute(); |
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$message = $useModel |
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? $this->message ?? $this->getFirstError() |
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: $this->message; |
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if ($message === null) { |
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return ''; |
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} |
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if ($this->messageCallback !== null) { |
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/** @var string $message */ |
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$message = call_user_func( |
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$this->messageCallback, |
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$message, |
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$useModel ? $this->getFormModel() : null, |
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$useModel ? $this->formAttribute : null |
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); |
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} |
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return CustomTag::name($this->tag) |
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->addAttributes($this->attributes) |
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->content($message) |
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->encode($this->encode) |
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->render(); |
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} |
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protected static function getThemeConfig(?string $theme): array |
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{ |
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return ThemeContainer::getTheme($theme)?->getErrorConfig() ?? []; |
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} |
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} |
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yiisoft /
form
