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<?php |
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namespace TraderInteractive\Filter; |
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/** |
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* A collection of filters for booleans. |
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*/ |
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final class Booleans |
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{ |
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/** |
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* Filters $value to a boolean strictly. |
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* |
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* $value must be a bool or 'true' or 'false' disregarding case and whitespace. |
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* |
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* The return value is the bool, as expected by the \TraderInteractive\Filterer class. |
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* |
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* @param string|bool $value the value to filter to a boolean |
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* @param bool $allowNull Set to true if NULL values are allowed. The filtered result of a NULL value is NULL |
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* @param array $trueValues Array of values which represent the boolean true value. Values should be lower cased |
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* @param array $falseValues Array of values which represent the boolean false value. Values should be lower cased |
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* |
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* @return bool|null the filtered $value |
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* |
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* @throws Exception if $value is not a string |
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* @throws Exception if $value is not 'true' or 'false' disregarding case and whitespace |
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*/ |
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public static function filter( |
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$value, |
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bool $allowNull = false, |
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array $trueValues = ['true'], |
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array $falseValues = ['false'] |
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) { |
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if ($allowNull === true && $value === null) { |
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return null; |
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} |
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if (is_bool($value)) { |
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return $value; |
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} |
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if (!is_string($value)) { |
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throw new Exception('"' . var_export($value, true) . '" $value is not a string'); |
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} |
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$value = trim($value); |
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$value = strtolower($value); |
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if (in_array($value, $trueValues, true)) { |
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return true; |
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} |
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if (in_array($value, $falseValues, true)) { |
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return false; |
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} |
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throw new Exception( |
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sprintf( |
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"%s is not '%s' disregarding case and whitespace", |
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$value, |
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implode("' or '", array_merge($trueValues, $falseValues)) |
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) |
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); |
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} |
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/** |
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* Filters the boolean $value to the given $true and $false cases |
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* |
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* @param boolean $value The boolean value to convert. |
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* @param mixed $true The value to return on the true case. |
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* @param mixed $false The value to return on the false case. |
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* |
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* @return mixed |
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*/ |
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public static function convert(bool $value, $true = 'true', $false = 'false') |
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{ |
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return $value ? $true : $false; |
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} |
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} |
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traderinteractive /
filter-php
