<?php

namespace KupShop\FeedGeneratorBundle;

use Symfony\Component\DependencyInjection\ContainerInterface;

class ContextPropertiesLocator
{
    /** @var ContainerInterface */
    private $container;

    /** @var array */
    private $contexts = [];

    public function __construct(ContainerInterface $container)
    {
        $this->container = $container;
    }

    public function addContextProperty($serviceID, string $name)
    {
        if (isset($this->contexts[$name])) {
            throw new \Exception('Duplicated feed generator context property name "'.$name.'" from service "'.$serviceID.'"!');
        }
        $this->contexts[$name] = ['serviceID' => $serviceID];
    }

    public function sortContexts()
    {
        ksort($this->contexts, SORT_STRING);
    }

    public function getContexts(): array
    {
        return $this->contexts;
    }

    public function getServiceByContextName(string $name)
    {
        return isset($this->contexts[$name]) ? $this->container->get($this->contexts[$name]['serviceID']) : null;
    }
}