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<?php |
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namespace dameter\abstracts\validators; |
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use yii\validators\StringValidator; |
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/** |
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* Class VariableNameValidator |
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* Validates the variable name based mainly on SPSS variable name limitations |
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* @link https://www.ibm.com/support/knowledgecenter/en/SSLVMB_23.0.0/spss/base/syn_variables_variable_names.html |
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* @author Tõnis Ormisson <[email protected]> |
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*/ |
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class VariableNameValidator extends StringValidator |
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{ |
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public $max = 64; |
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/** @var string $containsSpacesMsg A message if the value contains spaces */ |
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public $containsSpacesMsg; |
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/** @var string $invalidFirstLetterMsg A message if invalid first letter */ |
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public $invalidFirstLetterMsg; |
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/** @var string $containsInvalidCharsMsg A message if contains invalid characters */ |
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public $containsInvalidCharsMsg; |
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const ALLOWED_NON_ALPHA_CHARACTERS = ['.', '-', '_']; |
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/** |
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* {@inheritdoc} |
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*/ |
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public function init() |
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{ |
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parent::init(); |
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$this->containsSpacesMsg = \Yii::t('dmabstract', "{attribute} must not contain spaces!"); |
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$this->invalidFirstLetterMsg = \Yii::t('dmabstract', "The first character of {attribute} must be a letter!"); |
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$this->containsInvalidCharsMsg = \Yii::t('dmabstract', "{attribute} contains invalid characters!"); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function validateAttribute($model, $attribute) |
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{ |
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parent::validateAttribute($model, $attribute); |
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$value = $model->{$attribute}; |
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if (!is_string($value)) { |
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$this->addError($model, $attribute, $this->message); |
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} else { |
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if (strpos($model->{$attribute}, ' ') !== false) { |
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$this->addError($model, $attribute, $this->containsSpacesMsg); |
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} |
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if (!ctype_alpha($model->{$attribute}[0])) { |
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$this->addError($model, $attribute, $this->invalidFirstLetterMsg); |
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} |
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if ($this->containsInvalidCharacters($model->{$attribute})) { |
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$this->addError($model, $attribute, $this->containsInvalidCharsMsg); |
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} |
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} |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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protected function validateValue($value) |
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{ |
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$validation = parent::validateValue($value); |
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if (!is_null($validation)) { |
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return $validation; |
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} |
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if (strpos($value, ' ') !== false) { |
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return [$this->containsSpacesMsg, []]; |
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} |
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if (!ctype_alpha($value[0])) { |
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return [$this->invalidFirstLetterMsg, []]; |
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} |
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if ($this->containsInvalidCharacters($value)) { |
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return [$this->containsInvalidCharsMsg, []]; |
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} |
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return null; |
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} |
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/** |
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* @param string $value |
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* @return bool |
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*/ |
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private function containsInvalidCharacters($value) |
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{ |
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if (!ctype_alnum($value)) { |
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foreach (str_split($value) as $char) { |
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if (!ctype_alnum($char) && !in_array($char, self::ALLOWED_NON_ALPHA_CHARACTERS)) { |
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return true; |
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} |
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} |
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// allowed chars only |
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return false; |
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} |
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return false; |
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} |
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110
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} |
dameter /
survey-abstracts
