Write screenshot to file

[negiDharmendra]

• Changed default screenshot grabber to write to file and return file path.
• Depricate existing custom screenshot grabber API contract.
• Create a new API contact for custom screenshot grabber to write the screenshot into file and returning file path instead of screenhsot bytes.

import java.io.File;
import java.io.IOException;
import java.nio.file.Paths;
import org.apache.commons.io.FileUtils;
import org.openqa.selenium.OutputType;
import org.openqa.selenium.TakesScreenshot;
import com.thoughtworks.gauge.screenshot.CustomScreenshotWriter;

import driver.DriverFactory;

public class CustomScreenshotGrabber implements CustomScreenshotWriter {

    @Override
    public String takeScreenshot() {
        TakesScreenshot driver = (TakesScreenshot) DriverFactory.getDriver();
        File screenshotFile = new File(Paths.get(System.getenv("gauge_screenshots_dir"), "screenshot-1.png").toString());
        File tmpFile = driver.getScreenshotAs(OutputType.FILE);
        try {
            FileUtils.copyFile(tmpFile, screenshotFile);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return screenshotFile.getName();
    }

}