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<?php |
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declare(strict_types=1); |
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namespace Sirius\Validation\Rule\File; |
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use Sirius\Validation\Rule\AbstractRule; |
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use Sirius\Validation\Util\RuleHelper; |
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class ImageRatio extends AbstractRule |
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{ |
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// the image width/height ration; |
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// can be a number or a string like 4:3, 16:9 |
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const OPTION_RATIO = 'ratio'; |
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// how much can the image ratio diverge from the allowed ratio |
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const OPTION_ERROR_MARGIN = 'error_margin'; |
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const MESSAGE = 'The image does must have a ratio (width/height) of {ratio})'; |
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const LABELED_MESSAGE = '{label} does must have a ratio (width/height) of {ratio})'; |
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protected $options = [ |
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self::OPTION_RATIO => 0, |
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self::OPTION_ERROR_MARGIN => 0, |
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]; |
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protected function normalizeRatio($ratio) |
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{ |
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if (is_numeric($ratio) || $ratio == filter_var($ratio, FILTER_SANITIZE_NUMBER_FLOAT)) { |
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return floatval($ratio); |
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} |
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if (strpos($ratio, ':') !== false) { |
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list($width, $height) = explode(':', $ratio); |
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return $width / $height; |
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} |
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return 0; |
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} |
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public function validate($value, string $valueIdentifier = null) |
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{ |
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$this->value = $value; |
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$ratio = RuleHelper::normalizeImageRatio($this->options[self::OPTION_RATIO]); |
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if (! file_exists($value)) { |
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$this->success = false; |
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} elseif ($ratio == 0) { |
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$this->success = true; |
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} else { |
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$imageInfo = getimagesize($value); |
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if (is_array($imageInfo)) { |
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$actualRatio = $imageInfo[0] / $imageInfo[1]; |
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$this->success = abs($actualRatio - $ratio) <= $this->options[self::OPTION_ERROR_MARGIN]; |
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} else { |
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// no image size computed => no valid image |
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return $this->success = false; |
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} |
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} |
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return $this->success; |
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} |
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} |
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siriusphp /
validation
