import org.openqa.selenium.By;
import org.openqa.selenium.NoSuchElementException;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.htmlunit.HtmlUnitDriver;
import org.testng.annotations.AfterTest;
import org.testng.annotations.BeforeTest;
import org.testng.annotations.Test;
 
import java.util.ArrayList;
import java.util.List;
 
public class Meetup {
 
    HtmlUnitDriver driver;
 
    String meetup = "seleniumlondon"; //meetup name from URL
    String event = "14712022"; //event ID from URL
 
    @BeforeTest
    public void startDriver() {
        driver = new HtmlUnitDriver();
    }
 
    @AfterTest
    public void stopDriver() {
        driver.close();
    }
 
    @Test
    public void listResponses() {
 
        //open the event page
        driver.get("http://www.meetup.com/" + meetup + "/calendar/" + event + "/");
 
        if (driver.findElement(By.xpath("id('C_document')/descendant::dl[@class='stats'][2]/dt")).getText().equals("Who’s coming?")) {
            //this event has not yet occurred
            listMembers("id('C_document')//li[div[@class='D_attendeeHeader D_yes']]//li[starts-with(@id, 'member_')]", "Yes");
            listMembers("id('C_document')//li[div[@class='D_attendeeHeader D_maybe']]//li[starts-with(@id, 'member_')]", "Maybe");
            listMembers("id('C_document')//li[div[@class='D_attendeeHeader D_no']]//li[starts-with(@id, 'member_')]", "No");
        } else {
            //this event is in the past
            listMembers("id('C_document')//li[starts-with(@id, 'member_')]", "Attended");
        }
    }
 
    public void listMembers(String xpath, String label) {
 
        //get a list of all members that have responded or attended
        List<WebElement> memberElements = driver.findElements(By.xpath(xpath));
 
        int guestTotal = 0; //set guest total to zero
        List<Member> members = new ArrayList<Member>(); //create a list to store our members
        for (WebElement member : memberElements) {
            String name = member.findElement(By.className("D_name")).getText(); //member name
 
            int guests = 0; //set member's guests to zero
 
            //get the number of guests for this member
            try {
                //upcoming events use a different class for the guest count as past events
                String guestsTemp = member.findElement(By.className("guests")).getText();
                guests = new Integer(guestsTemp.substring(guestsTemp.indexOf("+")+1, guestsTemp.indexOf(" ")));
            } catch (NoSuchElementException e) { }
 
            try {
                String guestsTemp = member.findElement(By.className("D_guests")).getText();
                //past events use a different format for the guest count
                guests = new Integer(guestsTemp.substring(guestsTemp.indexOf("+")+1, guestsTemp.indexOf(")")));
            } catch (NoSuchElementException e) { }
 
            guestTotal = guestTotal + guests; //update the total number of guests for this event
            members.add(new Member(name, guests)); //add the current member to our list
        }
 
        //output a label for this list including total member and guest counts
        System.out.println("\n" + members.size() + " " + label + getGuestSuffix(guestTotal));
 
        for (int i=0; i<members.size(); i++) {
            //output details for each member
            System.out.println(i+1 + ". " + members.get(i).name + getGuestSuffix(members.get(i).guests));
        }
    }
 
    public String getGuestSuffix(int guests) {
        //return a suffix to indicate the number of guests
        if (guests > 0) {
            return " (+" + guests + " guest" + (guests > 1 ? "s" : "") + ")";
        } else {
            return "";
        }
    }
 
    //inner class for members
    public class Member {
 
        String name;
        int guests;
 
        public Member(String name, int guests) {
            this.name = name;
            this.guests = guests;
        }
 
    }
 
}