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<?php

/*
 * This file is part of the Mink package.
 * (c) Konstantin Kudryashov <[e-mail]>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Behat\Mink\Element;

use Behat\Mink\Driver\DriverInterface;
use Behat\Mink\Exception\ElementNotFoundException;
use Behat\Mink\Selector\SelectorsHandler;
use Behat\Mink\Selector\Xpath\Manipulator;
use Behat\Mink\Session;

/**
 * Base element.
 *
 * @author Konstantin Kudryashov <[e-mail]>
 */
abstract class Element implements ElementInterface
{
    /**
     * @var Session
     */
    private $session;

    /**
     * Driver.
     *
     * @var DriverInterface
     */
    private $driver;

    /**
     * @var SelectorsHandler
     */
    private $selectorsHandler;

    /**
     * @var Manipulator
     */
    private $xpathManipulator;

    /**
     * Initialize element.
     *
     * @param Session $session
     */
    public function __construct(Session $session)
    {
        $this->xpathManipulator = new Manipulator();
        $this->session = $session;

        $this->driver = $session->getDriver();
        $this->selectorsHandler = $session->getSelectorsHandler();
    }

    /**
     * Returns element session.
     *
     * @return Session
     *
     * @deprecated Accessing the session from the element is deprecated as of 1.6 and will be impossible in 2.0.
     */
    public function getSession()
    {
        @trigger_error(sprintf('The method %s is deprecated as of 1.6 and will be removed in 2.0', __METHOD__), E_USER_DEPRECATED);

        return $this->session;
    }

    /**
     * Returns element's driver.
     *
     * @return DriverInterface
     */
    protected function getDriver()
    {
        return $this->driver;
    }

    /**
     * Returns selectors handler.
     *
     * @return SelectorsHandler
     *
     * @deprecated Accessing the selectors handler in the element is deprecated as of 1.7 and will be impossible in 2.0.
     */
    protected function getSelectorsHandler()
    {
        @trigger_error(sprintf('The method %s is deprecated as of 1.7 and will be removed in 2.0', __METHOD__), E_USER_DEPRECATED);

        return $this->selectorsHandler;
    }

    /**
     * {@inheritdoc}
     */
    public function has($selector, $locator)
    {
        return null !== $this->find($selector, $locator);
    }

    /**
     * {@inheritdoc}
     */
    public function isValid()
    {
        return 1 === count($this->getDriver()->find($this->getXpath()));
    }

    /**
     * {@inheritdoc}
     */
    public function waitFor($timeout, $callback)
    {
        if (!is_callable($callback)) {
            throw new \InvalidArgumentException('Given callback is not a valid callable');
        }

        $start = microtime(true);
        $end = $start + $timeout;

        do {
            $result = call_user_func($callback, $this);

            if ($result) {
                break;
            }

            usleep(100000);
        } while (microtime(true) < $end);

        return $result;
    }

    /**
     * {@inheritdoc}
     */
    public function find($selector, $locator)
    {
        $items = $this->findAll($selector, $locator);

        return count($items) ? current($items) : null;
    }

    /**
     * {@inheritdoc}
     */
    public function findAll($selector, $locator)
    {
        if ('named' === $selector) {
            $items = $this->findAll('named_exact', $locator);
            if (empty($items)) {
                $items = $this->findAll('named_partial', $locator);
            }

            return $items;
        }

        $xpath = $this->selectorsHandler->selectorToXpath($selector, $locator);
        $xpath = $this->xpathManipulator->prepend($xpath, $this->getXpath());

        return $this->getDriver()->find($xpath);
    }

    /**
     * {@inheritdoc}
     */
    public function getText()
    {
        return $this->getDriver()->getText($this->getXpath());
    }

    /**
     * {@inheritdoc}
     */
    public function getHtml()
    {
        return $this->getDriver()->getHtml($this->getXpath());
    }

    /**
     * Returns element outer html.
     *
     * @return string
     */
    public function getOuterHtml()
    {
        return $this->getDriver()->getOuterHtml($this->getXpath());
    }

    /**
     * Builds an ElementNotFoundException.
     *
     * @param string      $type
     * @param string|null $selector
     * @param string|null $locator
     *
     * @return ElementNotFoundException
     *
     * @deprecated as of 1.7, to be removed in 2.0
     */
    protected function elementNotFound($type, $selector = null, $locator = null)
    {
        @trigger_error(sprintf('The method %s is deprecated as of 1.7 and will be removed in 2.0', __METHOD__), E_USER_DEPRECATED);

        return new ElementNotFoundException($this->driver, $type, $selector, $locator);
    }
}