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<?php declare(strict_types=1); |
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namespace Benrowe\Properties; |
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class TypeChecker |
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{ |
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private $value; |
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const DOCBLOCK_PARAM_PATTERN = "/^(([a-z\\\])+(\[\])?\|?)+$/i"; |
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const TYPES = [ |
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'string', |
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'integer', |
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'int', |
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'float', |
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'boolean', |
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'bool', |
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'array', |
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'object', |
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'null', |
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'resource', |
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]; |
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private $remap = [ |
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'int' => 'integer', |
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'bool' => 'boolean', |
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]; |
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/** |
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* Grabs the value to check |
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*/ |
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public function __construct($value) |
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{ |
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$this->value = $value; |
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} |
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/** |
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* Check the already supplied value against the type specified |
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*/ |
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public function check(string $type): bool |
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{ |
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if (!preg_match("/^(([a-z\\\])+(\[\])?\|?)+$/i", $type)) { |
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throw new TypeException("Unknown type check for \"$type\""); |
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} |
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$types = $this->normaliseTypes(explode('|', $type)); |
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foreach ($types as $type) { |
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if (substr($type, -2) === '[]') { |
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$type = substr($type, 0, -2); |
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if ($this->isArrayOf($type, $this->value)) { |
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return true; |
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} |
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} else { |
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if ($this->checkType($type, $this->value)) { |
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return true; |
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} |
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} |
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} |
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return false; |
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} |
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public function checkAsClosure(\Closure $closure): bool |
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{ |
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$result = call_user_func($closure, $this->value, $this); |
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if (gettype($result) !== 'boolean') { |
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throw new TypeException('Return value for closure is not boolean'); |
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} |
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return $result; |
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} |
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private function isArrayOf(string $type, $value): bool |
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{ |
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if (!is_array($value)) { |
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return false; |
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} |
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foreach ($value as $val) { |
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if (!$this->checkType($type, $val)) { |
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return false; |
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} |
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} |
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return true; |
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} |
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private function checkType(string $type, $value): bool |
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{ |
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if ($this->isBaseType($type)) { |
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$calcType = gettype($value); |
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if (array_key_exists($type, $this->remap)) { |
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$type = $this->remap[$type]; |
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} |
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return $calcType === $type; |
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} |
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return (bool)($value instanceof $type); |
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} |
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/** |
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* Clean up the supplied array of types |
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* |
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* @param array $types |
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* |
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* @return array |
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*/ |
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private function normaliseTypes(array $types): array |
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{ |
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return array_filter(array_map('trim', $types)); |
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} |
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/** |
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* Determine if the supplied type is one of php's base values |
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* |
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* @param string $type |
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* @return bool |
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*/ |
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private function isBaseType(string $type): bool |
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{ |
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return in_array($type, self::TYPES, true); |
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} |
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} |
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benrowe /
properties
