<?php

namespace Task;

class Injector

{

protected $container;

public function __construct(\Pimple $container)

{

$this->container = $container;

}

public function __invoke(array $arguments, $bindTo = null)

{

$callback = array_pop($arguments);

if (!is_callable($callback)) {

throw new \InvalidArgumentException("Last element must be callable");

}

if ($callback instanceof \Closure) {

$callback = $callback->bindTo($bindTo);

}

# Can't do this with array_map because exceptions are swallowed (see

# https://bugs.php.net/bug.php?id=55416).

$args = [];

foreach ($arguments as $id) {

$args[] = $this->container[$id];

}

return function () use ($callback, $args) {

return call_user_func_array($callback, $args);

};

}

}