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<?php |
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declare(strict_types=1); |
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namespace TYPO3Fluid\Fluid\ViewHelpers\Expression; |
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/* |
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* This file belongs to the package "TYPO3 Fluid". |
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* See LICENSE.txt that was shipped with this package. |
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*/ |
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use TYPO3Fluid\Fluid\Component\ExpressionComponentInterface; |
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use TYPO3Fluid\Fluid\Core\Parser\ExpressionException; |
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use TYPO3Fluid\Fluid\Core\Rendering\RenderingContextInterface; |
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use TYPO3Fluid\Fluid\Core\ViewHelper\AbstractViewHelper; |
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/** |
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* Math Expression ViewHelper, seconds as expression type |
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*/ |
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class CastViewHelper extends AbstractViewHelper implements ExpressionComponentInterface |
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{ |
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protected $parts = []; |
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protected static $validTypes = [ |
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'integer', 'boolean', 'string', 'float', 'array', \DateTime::class |
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]; |
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public function __construct(iterable $parts = []) |
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{ |
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$this->parts = $parts; |
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} |
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protected function initializeArguments() |
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{ |
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$this->registerArgument('subject', 'mixed', 'Numeric first value to calculate', true); |
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$this->registerArgument('as', 'string', 'Type to cast, valid values are: integer, boolean, string, float and array', true); |
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} |
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public function evaluate(RenderingContextInterface $renderingContext) |
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{ |
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$arguments = $this->getArguments()->setRenderingContext($renderingContext)->getArrayCopy(); |
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if (!empty($this->parts)) { |
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$parts = $this->parts; |
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} else { |
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$parts = [$arguments['subject'], 'as', $arguments['as']]; |
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} |
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return $this->evaluateParts($renderingContext, $parts); |
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} |
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protected function evaluateParts(RenderingContextInterface $renderingContext, iterable $parts) |
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{ |
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$subject = $parts[0]; |
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if (is_string($subject)) { |
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$subject = $renderingContext->getVariableProvider()->get($subject) ?? $subject; |
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} |
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return static::convert($subject, $parts[2]); |
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} |
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/** |
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* Requires exactly three parts: X as Y. Match a size of 3 parts |
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* and verify the middle part is string "as". |
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* |
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* @param array $parts |
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* @return bool |
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*/ |
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public static function matches(array $parts): bool |
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{ |
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$valid = !isset($parts[3]) && ($parts[1] ?? null) === 'as'; |
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if ($valid && !in_array($parts[2], self::$validTypes, true)) { |
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throw new ExpressionException( |
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sprintf( |
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'Invalid target conversion type "%s" specified in casting expression "{%s}".', |
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$parts[2], |
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implode(' ', $parts) |
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), |
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1559248372 |
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); |
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} |
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return $valid; |
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} |
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/** |
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* @param mixed $variable |
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* @param string $type |
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* @return mixed |
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*/ |
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protected static function convert($variable, string $type) |
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{ |
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$value = null; |
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if ($type === 'integer') { |
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$value = (integer) $variable; |
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} elseif ($type === 'boolean') { |
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$value = (boolean) $variable; |
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} elseif ($type === 'string') { |
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$value = (string) $variable; |
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} elseif ($type === 'float') { |
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$value = (float) $variable; |
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} elseif ($type === \DateTime::class) { |
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$value = self::convertToDateTime($variable); |
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} elseif ($type === 'array') { |
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$value = (array) self::convertToArray($variable); |
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} |
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return $value; |
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} |
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/** |
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* @param mixed $variable |
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* @return \DateTime|false |
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*/ |
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protected static function convertToDateTime($variable) |
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{ |
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if (!is_numeric($variable)) { |
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return new \DateTime($variable); |
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} |
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return \DateTime::createFromFormat('U', (string) $variable); |
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} |
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protected static function convertToArray($variable): array |
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{ |
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if (is_array($variable)) { |
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return $variable; |
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} elseif (is_string($variable) && strpos($variable, ',')) { |
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return array_map('trim', explode(',', $variable)); |
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} elseif (is_object($variable) && $variable instanceof \Iterator) { |
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$array = []; |
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foreach ($variable as $key => $value) { |
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$array[$key] = $value; |
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} |
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return $array; |
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} elseif (is_object($variable) && method_exists($variable, 'toArray')) { |
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return $variable->toArray(); |
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} elseif (is_bool($variable)) { |
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return []; |
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} else { |
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return [$variable]; |
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} |
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} |
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} |
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