CapMousse\ReactRestify\Container\Container

Complexity

Total Complexity

26

Size/Duplication

Total Lines	181
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	0

Importance

Changes

0

10 Methods

Rating	Name	Duplication	Size	Complexity
A	getInstance()	0	8	2
A	add()	0	8	3
A	has()	0	8	2
A	get()	0	4	1
A	call()	0	20	3
A	getActionReflection()	0	8	2
A	getParametersDictionary()	0	11	3
A	getParameters()	0	11	2
B	getParameter()	0	18	6
A	build()	0	11	2

<?php

namespace CapMousse\ReactRestify\Container;

use ReflectionClass;
use ReflectionMethod;
use ReflectionFunction;
use ReflectionFunctionAbstract;
use ReflectionParameter;

class Container
{
    private static $instance;

    /**
     * Resolved types
     * @var array
     */
    protected $definitions = [];

    /**
     * Globally available container
     *
     * @return static
     */
    public static function getInstance()
    {
        if (is_null(self::$instance)) {
            self::$instance = new static;
        }

        return self::$instance;
    }

    /**
     * Add item to the container
     * @param string $alias
     * @param mixed|null $concrete
     */
    public function add($alias, $concrete = null)
    {
        if (isset($this->definitions[$alias])) return;

        if (is_null($concrete)) $concrete = $alias;

        $this->definitions[$alias] = $this->build($concrete);
    }

    /**
     * Check if item is available in container
     * @param  string  $alias
     * @return boolean
     */
    public function has($alias)
    {
        if (array_key_exists($alias, $this->definitions)) {
            return true;
        }

        return false;
    }

    /**
     * Get an item of the container
     * @param  string $alias
     * @return mixed
     */
    public function get($alias)
    {
        return $this->definitions[$alias];
    }

    /**
     * Call method with given parameters
     * @param  string|callable  $action
     * @param  array            $args
     * @return mixed
     */
    public function call ($action, array $args = [])
    {
        $method = $action;
        $class = null;

        if (is_string($action)) {
            list($class, $method) = explode('@', $action);
        }

        $reflection = $this->getActionReflection($method, $class);
        $args       = $this->getParametersDictionary($args);
        $parameters = $this->getParameters($reflection, $args);

        if (is_callable($method)) {
            return $method(...$parameters);
        }

        $class = $this->build($class);
        return $class->{$method}(...$parameters);
    }

    /**
     * Get reflection from an action
     * @param string      $method
     * @param string|null $class
     * @return callable
     */
    public function getActionReflection($method, $class = null)
    {
        if(!is_null($class)) {
            return new ReflectionMethod($class, $method);
        }

        return new ReflectionFunction($method);
    }

    /**
     * Find object and set classname alias on argument list
     * @param  array  $args
     * @return array
     */
    public function getParametersDictionary(array $args = [])
    {
        $dictionary = [];

        foreach ($args as $parameter) {
            if (!is_object($parameter)) continue;
            $dictionary[get_class($parameter)] = $parameter;
        }

        return array_merge($args, $dictionary);
    }

    /**
     * Get reflection parameters
     * @param  ReflectionFunctionAbstract $reflection
     * @param  array                      $args
     * @return array
     */
    public function getParameters(ReflectionFunctionAbstract $reflection, array $args = [])
    {
        $dependencies = $reflection->getParameters();
        $parameters = [];

        foreach ($dependencies as $parameter) {
            $parameters[] = $this->getParameter($parameter, $args);
        }

        return $parameters;
    }

    /**
     * Get paremeter value
     * @param  ReflectionParameter $parameter 
     * @param  array               $args      
     * @return mixed
     */
    public function getParameter(ReflectionParameter $parameter, array $args = [])
    {
        $class = $parameter->getClass();

        if ($class && $this->has($class->name)) {
            return $this->get($class->name);
        }

        if ($class && array_key_exists($class->name, $args)) {
            return $args[$class->name];
        }

        if (array_key_exists($parameter->name, $args)) {
            return $args[$parameter->name];
        }

        return null;
    }

    /**
     * Create a new container for asked class
     * @param  string $class
     * @return Container
     */
    public function build ($class)
    {
        $reflection = new ReflectionClass($class);
        $parameters = [];

        if (!is_null($reflection->getConstructor())) {
            $parameters = $this->getParameters($reflection->getConstructor());
        }

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