SimpleDIC\DIC

Complexity

Total Complexity

43

Size/Duplication

Total Lines	283
Duplicated Lines	0 %

Importance

Changes	3
Bugs	0	Features	0

17 Methods

Rating	Name	Duplication	Size	Complexity
A	getArgumentToInject()	0	5	2
A	getCacheFilePath()	0	3	1
A	count()	0	3	1
B	instantiateTheClass()	0	29	7
A	getParamKey()	0	3	1
A	getCache()	0	3	1
A	getArgumentsToInject()	0	11	3
A	has()	0	7	2
B	setInCache()	0	22	7
A	getFromEnvOrDICParams()	0	11	5
A	calculateCreatingTime()	0	8	1
A	keys()	0	3	1
A	initFromFile()	0	27	4
A	getEnvKey()	0	5	2
A	get()	0	4	2
A	getMetadata()	0	4	2
A	getCacheDir()	0	3	1

<?php

namespace SimpleDIC;

use SimpleDIC\Parser\Parser;

class DIC
{
    /**
     * @var string
     */
    private static $filename;

    /**
     * @param string $filename
     *
     * @throws Exceptions\ParserException
     */
    public static function initFromFile($filename)
    {
        self::$filename = $filename;

        // create cache file if does not exists
        if (false === file_exists($sha1file = self::getCacheFilePath())) {
            $cachedMap = [];

            foreach (Parser::parse(self::$filename) as $key => $content) {
                $start = microtime(true);
                $memoryUsage = memory_get_usage();

                $cachedMap[$key] = [
                    'value'     => self::setInCache($cachedMap, $content),
                    '@metadata' => [
                        'type'         => gettype(self::setInCache($cachedMap, $content)),
                        'create_time'  => self::calculateCreatingTime($start),
                        'memory_usage' => (memory_get_usage() - $memoryUsage),
                    ],
                ];
            }

            if (false === is_dir(self::getCacheDir())) {
                mkdir(self::getCacheDir(), 0755, true);
            }

            file_put_contents($sha1file, '<?php return unserialize(\''. serialize($cachedMap) .'\');' . PHP_EOL);
        }
    }

    /**
     * @param float $start
     *
     * @return float
     */
    private static function calculateCreatingTime($start)
    {
        $stringval = microtime(true) - $start;
        $numericval = sscanf((string)$stringval, "%f")[0];

        $seconds = number_format($numericval, 8);

        return (float)$seconds * 1000000;
    }

    /**
     * @return string
     */
    private static function getCacheDir()
    {
        return __DIR__.'/../_cache/';
    }

    /**
     * @return string
     */
    private static function getCacheFilePath()
    {
        return self::getCacheDir() . sha1_file(self::$filename) .'.php';
    }

    /**
     * @return mixed
     */
    private static function getCache()
    {
        return include(self::getCacheFilePath());
    }

    /**
     * @return int
     */
    public static function count()
    {
        return count(self::getCache());
    }

    /**
     * @param string $id
     *
     * @return mixed
     */
    public static function get($id)
    {
        if (self::has($id)) {
            return self::getCache()[$id]['value'];
        }
    }

    /**
     * @param string $id
     *
     * @return mixed
     */
    public static function getMetadata($id)
    {
        if (self::has($id)) {
            return self::getCache()[$id]['@metadata'];
        }
    }

    /**
     * @param string $id
     *
     * @return bool
     */
    public static function has($id)
    {
        if (false === file_exists($sha1file = self::getCacheFilePath())) {
            return false;
        }

        return isset(self::getCache()[$id]);
    }

    /**
     * @return array
     */
    public static function keys()
    {
        return array_keys(self::getCache());
    }

    /**
     * Set an entry in the container.
     *
     * @param array $cachedMap
     * @param mixed $content
     *
     * @return mixed|bool|null
     */
    private static function setInCache($cachedMap, $content)
    {
        // if is not a class set the entry value in DIC
        if (false === isset($content['class'])) {
            return self::getFromEnvOrDICParams($content);
        }

        // otherwise it's a class, so extract variables
        $class           = $content['class'];
        $classArguments  = isset($content['arguments']) ? $content['arguments'] : null;
        $method          = isset($content['method']) ? $content['method'] : null;
        $methodArguments = isset($content['method_arguments']) ? $content['method_arguments'] : null;

        $methodArgsToInject = self::getArgumentsToInject($cachedMap, $methodArguments);
        $classArgsToInject = self::getArgumentsToInject($cachedMap, $classArguments);

        try {
            return self::instantiateTheClass($class, $classArgsToInject, $method, $methodArgsToInject);
        } catch (\Error $error) {
            return false;
        } catch (\Exception $exception) {
            return false;
        }
    }

    /**
     * @param string $class
     * @param array $classArguments
     * @param null $method

Are you sure the doc-type for parameter $method is correct as it would always require null to be passed?

     * @param array $methodArguments
     *
     * @return mixed|bool
     *
     * @throws \ReflectionException
     */
    private static function instantiateTheClass($class, array $classArguments = [], $method = null, array $methodArguments = [])
    {
        if (false === class_exists($class)) {
            return false;
        }

        $reflected = new \ReflectionClass($class);

        // 1. the class has no method to call
        if (null == $method) {

The condition null == $method is always true.

            return new $class(...$classArguments);
        }

        if (false === $reflected->hasMethod($method)) {
            return false;
        }

        // 2. the method to call is static
        if ($reflected->getMethod($method)->isStatic()) {
            return $class::$method(...$methodArguments);
        }

        // 3. the class has a private constructor
        if ($reflected->hasMethod('__construct') and $reflected->getConstructor()->isPrivate()) {
            return call_user_func_array([$class, $method], $methodArguments);
        }

        // 4. the class has a public constructor
        return (new $class(...$classArguments))->$method(...$methodArguments);
    }

    /**
     * Get the arguments to inject into the class to instantiate within DIC.
     *
     * @param array $cachedMap
     * @param null  $providedArguments

Are you sure the doc-type for parameter $providedArguments is correct as it would always require null to be passed?

     *
     * @return array
     */
    private static function getArgumentsToInject(array $cachedMap = [], $providedArguments = null)
    {
        $returnArguments = [];

        if (null != $providedArguments) {

The condition null != $providedArguments is always false.

            foreach ($providedArguments as $argument) {
                $returnArguments[] = self::getArgumentToInject($cachedMap, $argument);
            }
        }

        return $returnArguments;
    }

    /**
     * @param array $cachedMap
     * @param string $argument
     *
     * @return mixed|string|null
     */
    private static function getArgumentToInject(array $cachedMap = [], $argument)
    {
        $id = ltrim($argument, '@');

        return (isset($cachedMap[$id])) ? $cachedMap[$id]['value'] : self::getFromEnvOrDICParams($argument);
    }

    /**
     * @param string $parameter
     *
     * @return mixed|string|null
     */
    private static function getFromEnvOrDICParams($parameter)
    {
        if (is_string($parameter)) {

The condition is_string($parameter) is always true.

            if (null !== self::getEnvKey($parameter)) {
                return (getenv(self::getEnvKey($parameter))) ? getenv(self::getEnvKey($parameter)) : $parameter;
            }

            return (DICParams::has(self::getParamKey($parameter))) ? DICParams::get(self::getParamKey($parameter)) : $parameter;
        }

        return $parameter;
    }

    /**
     * Extract from a string like %env(FOO)%
     *
     * @param string $string
     *
     * @return mixed|null
     */
    private static function getEnvKey($string)
    {
        preg_match('~%env\((.*?)\)%~', $string, $matches);

        return (count($matches) > 0) ? $matches[1] : null;
    }

    /**
     * @param string $string
     *
     * @return string
     */
    private static function getParamKey($string)
    {
        return trim($string, '%');
    }
}