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<?php |
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namespace TraderInteractive\Filter; |
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use TraderInteractive\Filterer; |
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/** |
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* A collection of filters for arrays. |
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*/ |
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final class Arrays |
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{ |
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/** |
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* Filter an array by throwing if not an array or count not in the min/max range. |
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* |
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* The return value is the $value, as expected by the \TraderInteractive\Filterer class. |
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* |
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* @param mixed $value the value to filter |
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* @param int $minCount the minimum allowed count in the array |
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* @param int $maxCount the maximum allowed count in the array |
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* |
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* @return mixed The passed in value |
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* |
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* @throws \InvalidArgumentException if $minCount was not an int |
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* @throws \InvalidArgumentException if $maxCount was not an int |
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* @throws Exception if $value is not an array |
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* @throws Exception if $value count is less than $minCount |
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* @throws Exception if $value count is greater than $maxCount |
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*/ |
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public static function filter($value, int $minCount = 1, int $maxCount = PHP_INT_MAX) |
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{ |
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if (!is_int($minCount)) { |
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throw new \InvalidArgumentException('$minCount was not an int'); |
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} |
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if (!is_int($maxCount)) { |
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throw new \InvalidArgumentException('$maxCount was not an int'); |
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} |
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if (!is_array($value)) { |
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throw new Exception("Value '" . trim(var_export($value, true), "'") . "' is not an array"); |
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} |
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//optimization for default case |
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if ($minCount === 1 && empty($value)) { |
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throw new Exception('$value count of 0 is less than 1'); |
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} |
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$count = count($value); |
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if ($count < $minCount) { |
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throw new Exception("\$value count of {$count} is less than {$minCount}"); |
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} |
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if ($count > $maxCount) { |
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throw new Exception("\$value count of {$count} is greater than {$maxCount}"); |
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} |
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return $value; |
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} |
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/** |
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* Filter an array by throwing if $value is not in $haystack adhering to $strict. |
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* |
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* The return value is the $value, as expected by the \TraderInteractive\Filterer class. |
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* |
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* @param mixed $value value to search for |
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* @param array $haystack array to search in |
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* @param bool $strict to compare strictly or not. @see in_array() |
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* |
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* @return mixed The passed in value |
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* |
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* @see in_array() |
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* |
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* @throws Exception if $value is not in array $haystack |
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*/ |
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public static function in($value, array $haystack, bool $strict = true) |
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{ |
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if (!in_array($value, $haystack, $strict)) { |
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throw new Exception( |
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"Value '" . trim(var_export($value, true), "'") . "' is not in array " . var_export($haystack, true) |
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); |
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} |
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return $value; |
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} |
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/** |
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* Given a multi-dimensional array, flatten the array to a single level. |
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* |
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* The order of the values will be maintained, but the keys will not. |
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* |
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* For example, given the array [[1, 2], [3, [4, 5]]], this would result in the array [1, 2, 3, 4, 5]. |
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* |
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* @param array $value The array to flatten. |
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* |
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* @return array The single-dimension array. |
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*/ |
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public static function flatten(array $value) : array |
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{ |
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$result = []; |
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array_walk_recursive( |
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$value, |
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function ($item) use (&$result) { |
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$result[] = $item; |
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} |
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); |
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return $result; |
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} |
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} |
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traderinteractive /
filter-php
