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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;
using OpenQA.Selenium.Chrome;
//using OpenQA.Selenium.Firefox;
using OpenQA.Selenium;
using OpenQA.Selenium.Support.UI;
using System.Drawing;
using System.Drawing.Imaging;
using System.Net;

namespace Facebook_Monitoring_System
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.OutputEncoding = Encoding.UTF8;
            //Get User Input
            //Console.WriteLine("------------- Enter Your Facebook User Name or Email or Phone -------------");
            //String FbUsername = Console.ReadLine();
            //Console.WriteLine("------------- Enter Your Facebook Password -------------");
            //String FbPassword = Console.ReadLine();
            //Console.SetCursorPosition(0, Console.CursorTop - 1);
            //ClearCurrentConsoleLine();

            Console.WriteLine("------------- Enter Desired Username to get Information -------------");
            String DesiredFbUser = Console.ReadLine();

            //Temp user
            String FbUsername = "dev.dnj";
            String FbPassword = "xxxxxxxxxx";

            //Desired user to get Information
            String DesiredUserURL = String.Format("https://mbasic.facebook.com/{0}?v=timeline", DesiredFbUser);

            //var chromeOptions = new ChromeOptions();
            //chromeOptions.AddArguments(new List<string>() { "headless" });
            //var driver = new ChromeDriver(chromeOptions);

            var chrome_options = new ChromeOptions();
            chrome_options.AddArgument("--disable-notifications");
            // chrome_options.addargument("headless");
            var driver = new ChromeDriver(chrome_options);

            // var driver = new FirefoxDriver();


            // Go to google
            driver.Navigate().GoToUrl("https://mbasic.facebook.com/");
            //IWebElement query = driver.FindElement(By.Name("q"));
            // query.SendKeys("Rafusoft");

            /*******************
            *  Login Page
            ********************/


            //Selectors

            //Login
            if (IsElementPresent(driver, By.CssSelector("input[name=\"email\"]")) && IsElementPresent(driver, By.CssSelector("input[name=\"pass\"]")) && IsElementPresent(driver, By.CssSelector("input[value=\"Log In\"]")))
            {
                var EmailInput = driver.FindElement(By.CssSelector("input[name=\"email\"]"));
                var PassInput = driver.FindElement(By.CssSelector("input[name=\"pass\"]"));
                var LoginButton = driver.FindElement(By.CssSelector("input[value=\"Log In\"]"));
                //Perform Input action and submit login
                EmailInput.SendKeys(FbUsername);
                // driver.Manage().Timeouts().ImplicitWait = TimeSpan.FromSeconds(2);
                PassInput.SendKeys(FbPassword);
                //driver.Manage().Timeouts().ImplicitWait = TimeSpan.FromSeconds(2);
                LoginButton.Click();
                // driver.Manage().Timeouts().ImplicitWait = TimeSpan.FromSeconds(5);


                if (IsElementPresent(driver, By.CssSelector("a[href^=\"/login/save-device\"]")))
                {
                    var NotNowLink = driver.FindElement(By.CssSelector("a[href^=\"/login/save-device\"]"));
                    NotNowLink.Click();
                }

                /*************************
                * Desired User Profile
                ***************************/
                // Go to desired user profile
                driver.Navigate().GoToUrl(DesiredUserURL);

                StreamWriter sw = new StreamWriter(AppDomain.CurrentDomain.BaseDirectory + @"\PostData.txt", true);

                IList<IWebElement> all = driver.FindElements(By.CssSelector("div[role=\"article\"]"));
                String[] allText = new String[all.Count];
                int i = 0;
                foreach (IWebElement element in all)
                {
                    allText[i++] = element.Text;

                    /** Crawling Time **/
                    sw.WriteLine(String.Format("Crawling Time: {0}", DateTime.Now.ToString()));
                    /** Crawling Time End **/

                    /** Post ID**/
                    String DataFtAttrValue = element.GetAttribute("data-ft");
                    Console.WriteLine(String.Format("Data FT Value: {0}", DataFtAttrValue));

                    String[] tokens = DataFtAttrValue.Split(',');
                    tokens = tokens[1].Split(':');
                    String PostId = tokens[1].Replace('"', ' ').Trim();

                    Console.WriteLine(String.Format("Post Id: {0}", PostId));
                    sw.WriteLine(String.Format("Post ID: {0}", PostId));

                    /** Post ID End**/


                    //Posted By

                    if (IsElementPresent(element, By.CssSelector("div div:nth-child(1) h3 strong a")))
                    {

                        String PosterName = element.FindElement(By.CssSelector("div div:nth-child(1) h3 strong a")).Text;

                        // String PostLikeCount = element.FindElement(By.XPath(".//*/a[1]")).Text;
                        //Console.WriteLine(element.Text);
                        sw.WriteLine(String.Format("Posted by: {0}\n", PosterName));

                        // sw.WriteLine(String.Format("Post Like Count: {0}\n\n", PostLikeCount));
                    }


                    //Post  Content
                    if (IsElementPresent(element, By.CssSelector("div div:nth-child(2)")))
                    {
                        String PostContent = element.FindElement(By.CssSelector("div div:nth-child(2)")).Text;
                        sw.WriteLine(String.Format("Post Content: {0}\n", PostContent));
                    }


                    // Post Time

                    if (IsElementPresent(element, By.CssSelector("div:nth-child(2) div:nth-child(1) abbr")))
                    {
                        String PostedTime = element.FindElement(By.CssSelector("div:nth-child(2) div:nth-child(1) abbr")).Text;
                        sw.WriteLine(String.Format("Posted Time: {0}\n", PostedTime));

                    }


                    // Post Privary
                    if (IsElementPresent(element, By.CssSelector("div:nth-child(2) div:nth-child(1) span span span")))
                    {
                        String PostPrivacy = element.FindElement(By.CssSelector("div:nth-child(2) div:nth-child(1) span span span")).Text;
                        sw.WriteLine(String.Format("Post Privacy: {0}\n\n", PostPrivacy));
                    }


                }
                sw.Flush();
                sw.Close();

                /**
                StreamWriter sw = new StreamWriter(AppDomain.CurrentDomain.BaseDirectory + @"\PostData.txt",true);
                IReadOnlyCollection<IWebElement> FbPosts = driver.FindElements(By.CssSelector("div[role=\"article\"]"));
                for (int i = 0; i < FbPosts.Count; i++)
                {
                    var PostInfo = FbPosts.ElementAt(i);
                    String Poster = PostInfo.FindElement(By.XPath("//div[1]/div[1]/table/tbody/tr/td[2]/div/h3/strong/a")).Text;
                    String PostContent = PostInfo.FindElement(By.XPath("//div[2]/div[2]/span/p")).GetAttribute("innerHTML"); ;
                    Console.WriteLine(String.Format("Posted By: {0}\n", Poster));
                    sw.WriteLine(String.Format("Posted By: {0}\n", Poster));
                    Console.WriteLine(String.Format("Post Content: {0}\n", PostContent));
                    sw.WriteLine(String.Format("Post Content: {0}\n", PostContent));

                    Console.WriteLine("\n\n\n");
                }
                sw.Flush();
                sw.Close();
                **/


                /**

                try
                {
                    driver.FindElement(By.XPath("//a[contains(text(),'Show more')]")).Click();
                    driver.FindElement(By.XPath("//a[contains(text(),'Show more')]")).Click();
                    driver.FindElement(By.XPath("//a[contains(text(),'Show more')]")).Click();
                    driver.FindElement(By.XPath("//a[contains(text(),'Show more')]")).Click();
                    driver.FindElement(By.XPath("//a[contains(text(),'Show more')]")).Click();
                    driver.FindElement(By.XPath("//a[contains(text(),'Show more')]")).Click();
                    driver.FindElement(By.XPath("//a[contains(text(),'Show more')]")).Click();
                    driver.FindElement(By.XPath("//a[contains(text(),'Show more')]")).Click();
                    driver.FindElement(By.XPath("//a[contains(text(),'Show more')]")).Click();

                }
                catch (Exception Ex)
                {
                    Console.WriteLine(Ex.Message);
                } **/


                int numberOfElements = driver.FindElements(By.CssSelector("div[role=\"article\"]")).Count;
                Console.WriteLine(String.Format("Total Facebook Post: {0}", numberOfElements));


                ////Log Out
                //try{
                //    WebDriverWait wait = new WebDriverWait(driver, TimeSpan.FromSeconds(3));
                //    for (int i = 1; i < 6; i++)
                //    {
                //        By locator = By.CssSelector("a[href^=\"/logout.php\"]");
                //        IWebElement element = driver.FindElement(locator);
                //        element.Click();
                //        wait.Until(ExpectedConditions.StalenessOf(element));
                //        wait.Until(ExpectedConditions.ElementToBeClickable(locator));
                //    }
                //    //var LogOut = driver.FindElement(By.CssSelector("a[href^=\"/logout.php\"]"));
                //    //LogOut.Click();
                //}
                //catch (Exception Ex)
                //{
                //    Console.WriteLine(Ex.Message);
                //}


               // WebDriverWait wait = new WebDriverWait(driver, TimeSpan.FromSeconds(100)); // time out after 5 seconds


                // Console.WriteLine(String.Format("Page title is: {0}",driver.));
                driver.Close();
                driver.Quit();

            }
            else
            {
                Console.WriteLine("Error: Unable to login. Problem with page loading...");
                driver.Close();
                driver.Quit();
                
            }


            Console.ReadKey();
           
        }

        private static bool IsElementPresent(IWebElement Element,  By by)
        {
            try
            {
                Element.FindElement(by);
                return true;
            }
            catch (NoSuchElementException)
            {
                return false;
            }
        }

        private static bool IsElementPresent(ChromeDriver Driver, By by)
        {
            try
            {
                Driver.FindElement(by);
                return true;
            }
            catch (NoSuchElementException)
            {
                return false;
            }
        }

        /**** Helper Functions ****/

        private static void ClearCurrentConsoleLine()
        {
            int currentLineCursor = Console.CursorTop;
            Console.SetCursorPosition(0, Console.CursorTop);
            Console.Write(new string(' ', Console.WindowWidth));
            Console.SetCursorPosition(0, currentLineCursor);
        }

        private void GetAndSaveImage(ChromeDriver driver, By ImageSelector)
        {
            ITakesScreenshot ssdriver = driver as ITakesScreenshot;
            Screenshot screenshot = ssdriver.GetScreenshot();

            Screenshot tempImage = screenshot;

            tempImage.SaveAsFile(@"full.png", ScreenshotImageFormat.Png);

            //replace with the XPath of the image element
            IWebElement my_image = driver.FindElement(ImageSelector);

            Point point = my_image.Location;
            int width = my_image.Size.Width;
            int height = my_image.Size.Height;

            Rectangle section = new Rectangle(point, new Size(width, height));
            Bitmap source = new Bitmap(@"full.png");
            Bitmap final_image = CropImage(source, section);

            final_image.Save(@"image.jpg");
        }

        private Bitmap CropImage(Bitmap source, Rectangle section)
        {
            Bitmap bmp = new Bitmap(section.Width, section.Height);
            Graphics g = Graphics.FromImage(bmp);
            g.DrawImage(source, 0, 0, section, GraphicsUnit.Pixel);
            return bmp;
        }

        private bool ImageDownload(String ImageSource)
        {
            Uri uri = new Uri(ImageSource);
            if (true)
            {
                string filename = System.IO.Path.GetFileName(uri.LocalPath);
                WebClient wb = new WebClient();
                wb.Headers.Add("User-Agent", "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2490.33 Safari/537.36");
                try
                {
                    wb.DownloadFile(ImageSource, @"fbphoto\" + filename);

                    return true;
                }
                catch (Exception Ex)
                {
                    Console.WriteLine(Ex.Message);
                    return false;
                }


            }

            return false;

        }


    }
}