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Viewing / Editing File: ScreenshotHelper.php

<?php

namespace Facebook\WebDriver\Support;

use Facebook\WebDriver\Exception\Internal\IOException;
use Facebook\WebDriver\Exception\Internal\UnexpectedResponseException;
use Facebook\WebDriver\Exception\WebDriverException;
use Facebook\WebDriver\Remote\DriverCommand;
use Facebook\WebDriver\Remote\RemoteExecuteMethod;

/**
 * Helper class to handle taking, decoding and screenshots using WebDriver.
 */
class ScreenshotHelper
{
    /** @var RemoteExecuteMethod */
    private $executor;

public function __construct(RemoteExecuteMethod $executor)
    {
        $this->executor = $executor;
    }

/**
     * @param string|null $saveAs
     * @throws WebDriverException
     * @return string
     */
    public function takePageScreenshot($saveAs = null)
    {
        $commandToExecute = [DriverCommand::SCREENSHOT];

return $this->takeScreenshot($commandToExecute, $saveAs);
    }

public function takeElementScreenshot($elementId, $saveAs = null)
    {
        $commandToExecute = [DriverCommand::TAKE_ELEMENT_SCREENSHOT, [':id' => $elementId]];

return $this->takeScreenshot($commandToExecute, $saveAs);
    }

private function takeScreenshot(array $commandToExecute, $saveAs = null)
    {
        $response = $this->executor->execute(...$commandToExecute);

if (!is_string($response)) {
            throw UnexpectedResponseException::forError(
                'Error taking screenshot, no data received from the remote end'
            );
        }

$screenshot = base64_decode($response, true);

if ($screenshot === false) {
            throw UnexpectedResponseException::forError('Error decoding screenshot data');
        }

if ($saveAs !== null) {
            $this->saveScreenshotToPath($screenshot, $saveAs);
        }

return $screenshot;
    }

private function saveScreenshotToPath($screenshot, $path)
    {
        $this->createDirectoryIfNotExists(dirname($path));

file_put_contents($path, $screenshot);
    }

private function createDirectoryIfNotExists($directoryPath)
    {
        if (!file_exists($directoryPath)) {
            if (!mkdir($directoryPath, 0777, true) && !is_dir($directoryPath)) {
                throw IOException::forFileError('Directory cannot be not created', $directoryPath);
            }
        }
    }
}

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