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<?php namespace SimpleHash; |
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use SimpleHash\Container\HashContainer; |
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use SimpleHash\Exception\SimpleHashException; |
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/** |
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* Hash factory |
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* |
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* @package SimpleHash |
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* @author Kai Hempel <[email protected]> |
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* @copyright 2016 Kai Hempel <[email protected]> |
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* @license http://www.opensource.org/licenses/BSD-3-Clause The BSD 3-Clause License |
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* @link https://www.kuweh.de/ |
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* @since Class available since Release 1.0.0 |
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*/ |
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class HashFactory |
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{ |
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/** |
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* Magic factory method |
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* |
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* @param string $name |
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* @param array $arguments |
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* @throws SimpleHashException |
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*/ |
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public function __call($name, $arguments) |
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{ |
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if ($this->isCalledGetter($name) === false) { |
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throw SimpleHashException::make('Unsupported method "' . $name . '" called!'); |
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} |
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// Intialize variables |
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$plainText = $this->getPlainStringFromArguments($arguments); |
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$calculatorParams = $this->getCalculatorParamsFromArguments($arguments); |
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// Initialize calculator |
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$calculatorClass = $this->getCalculatorName($name); |
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if ( ! $this->calculatorExists($calculatorClass)) { |
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throw SimpleHashException::make('No calclator "' . $calculatorClass . '" exists!'); |
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} |
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$calculator = $this->initializeCalculator($calculatorClass, $calculatorParams); |
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// Initialize hash container with hash string |
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$container = new HashContainer(); |
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$container->setHashString($calculator->getHash($plainText)); |
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// Return hash container |
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return $container; |
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} |
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/** |
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* Checks if a getter method was called |
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* |
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* @param string $name |
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* @return string |
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*/ |
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private function isCalledGetter($name) |
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{ |
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return substr($name, 0, 3) == 'get'; |
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} |
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/** |
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* Builds the calculator class name string |
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* |
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* @param string $name |
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* @return string |
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*/ |
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private function getCalculatorName($name) |
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{ |
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$algorithmName = str_replace(['get', 'Hash'], ['', ''], $name); |
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return '\SimpleHash\Calculator\\' . ucfirst(strtolower($algorithmName)) . 'Calculator'; |
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} |
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/** |
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* Checks if the given class name exists |
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* |
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* @param string $calculatorClass |
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* @return type |
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*/ |
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private function calculatorExists($calculatorClass) |
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{ |
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return class_exists($calculatorClass, true); |
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} |
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/** |
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* Extracts the string for hashing from the given argument array |
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* |
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* @param array $arguments |
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* @return string |
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*/ |
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private function getPlainStringFromArguments($arguments) |
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{ |
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if (empty($arguments) || empty($arguments[0])) { |
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return ''; |
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} |
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return $arguments[0]; |
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} |
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/** |
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* Extracts the calculator parameter from given argument array |
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* |
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* @param array $arguments |
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* @return type |
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*/ |
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private function getCalculatorParamsFromArguments($arguments) |
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{ |
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if (empty($arguments) || empty($arguments[1]) || ! is_array($arguments[1])) { |
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return []; |
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} |
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return $arguments[1]; |
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} |
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/** |
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* Initialize calculator object |
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* |
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* @param string $calculatorClass |
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* @param array $params |
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* @return \SimpleHash\Calculator\HashCalculatorInterface |
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*/ |
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private function initializeCalculator($calculatorClass, array $params) |
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{ |
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return new $calculatorClass($params); |
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} |
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} |
kaihempel /
simplehash
