/* 
 * Copyright (c) 2001, Xiaoping Jia.  
 * All Rights Reserved. 
 */

package expo2; 

import java.io.*; 
import java.util.*; 
import javax.servlet.*; 
import javax.servlet.http.*; 
import org.apache.ecs.*;
import org.apache.ecs.html.*;

/** 
 *  Java Expo web app version 2.
 *  The Java Expo web app registration servlet.
 *  
 * @version 1.1 2001/04/20 
 * @since 1.0
 * @author Xiaoping Jia
 */ 
public class JavaExpoRegister extends JavaExpoBase { 

  public boolean handleRequest(HttpServletRequest request, 
			       HttpServletResponse response, 
			       List contents) 
    throws ServletException, IOException { 
    contents.add(new H1("Enterprise Java Expo Registration")); 
    HttpSession session = request. getSession();
    //System.out.println("Default session lifetiem=" + session.getMaxInactiveInterval()); 
    String submit = request.getParameter("submit"); 
    RegistrationForm form = new RegistrationForm(); 
    if (submit == null) { // you have come to the page from the menu
      Form htmlform = new Form(response.encodeURL(urlPrefix + "JavaExpoRegister"), "post");
      contents.add(form.makeForm(htmlform)); 
    } else { //you have come here after hitting the submit button
      form.fillForm(request);
      String[] missing = form.validateForm();
      if (missing == null) { 
	session.setAttribute("registration form", form); // add the form to the session
	List confirmation = form.processForm(); 
	contents.addAll(confirmation);       
	contents.add(new Form(response.encodeURL(urlPrefix + "JavaExpoPresentations"), "post")
	  .addElement(new Input(Input.submit, "submit", "Select presentations")));
      } else { 
	contents.add("The follwing required field" + 
		     (missing.length > 1 ? "s are" : " is") + " missing"); 
	UL list = new UL(); 
	for (int i = 0; i < missing.length; i++) { 
	  list.addElement(new LI(missing[i]));
	}
	contents.add(list);
	Form htmlform = new Form(response.encodeURL(urlPrefix + "JavaExpoRegister"), "post");
	contents.add(form.makeForm(htmlform));
      }
    }
    return true; 
  }

  /**
   * A class represents the registration form for the Java Expo 
   */ 
  class RegistrationForm implements Serializable { 

    // fields in the registration form 

    String salutation; 
    String firstName, lastName; 
    String email;
    String company;
    String business; 
    String street, city, state, country, postalCode; 
    String[] interests; 
    String comments; 

    /**
     *   Build an HTML form that consists of the input fields of the registration form.  
     *   If the a field in the RegistrationForm object contains a non-null value, 
     *   the value will be filled in the corresponding input field in the HTML form.  
     *
     * @return an HTML form with fields corresponding to the fields of the RegistrationForm class.
     */
    Form makeForm(Form form) { 
      Input rbMr, rbMrs, rbMs, rbDr;
      Input inFirstName, inLastName, inEmail, inCompany, 
	inStreet, inCity, inState, inCountry, inPostalCode; 
      Input cbServlets, cbJSP, cbEJB, cbJDBC, cbJavaMail, cbJNDI, 
	cbJMS, cbJTA, cbJTS, cbIDL, cbRMI, cbConnector;
      TextArea taComments; 

      form
	.addElement(new Table()
	  .addElement(new TR()
	    .addElement(new TD().setColSpan(2)
	      .addElement(rbMr = new Input(Input.radio, "salutation", "Mr.")
		.addElement("&nbsp;Mr.&nbsp;"))
	      .addElement(rbMrs = new Input(Input.radio, "salutation", "Mrs.")
		.addElement("&nbsp;Mrs.&nbsp;"))
	      .addElement(rbMs = new Input(Input.radio, "salutation", "Ms.")
		.addElement("&nbsp;Ms.&nbsp;"))
	      .addElement(rbDr = new Input(Input.radio, "salutation", "Dr.")
		.addElement("&nbsp;Dr.&nbsp;"))))
	  .addElement(new TR()
	    .addElement(new TD("First&nbsp;name&nbsp;*"))
	    .addElement(new TD()
	      .addElement(inFirstName = new Input(Input.text, "firstname", "")
		.setSize(20)))
	    .addElement(new TD("Last&nbsp;name&nbsp;*"))
	    .addElement(new TD()
	      .addElement(inLastName = new Input(Input.text, "lastname", "")
		.setSize(20))))
	  .addElement(new TR()
	    .addElement(new TD("E-mail&nbsp;*"))
	    .addElement(new TD()
	      .addElement(inEmail = new Input(Input.text, "email", "")
		.setSize(20)))
	    .addElement(new TD("Company"))
	    .addElement(new TD()
	      .addElement(inCompany = new Input(Input.text, "company", "")
		.setSize(20))))
	  .addElement(new TR()
	    .addElement(new TD("Primary area of business").setColSpan(2)))
	  .addElement(new TR()
	    .addElement(new TD().setColSpan(4)
	      .addElement(new Table()
		.addElement(new TR()
		  .addElement(new TD("&nbsp;"))
		  .addElement(new TD()
		    .addElement(new Select("business")
		      .addElement(new Option("Software Development")
			.addElement("&nbsp;Software Development&nbsp;"))
		      .addElement(new Option("Consulting")
			.addElement("&nbsp;Consulting&nbsp;"))
		      .addElement(new Option("E-Commerce")
			.addElement("&nbsp;E-Commerce&nbsp;"))
		      .addElement(new Option("Financial")
			.addElement("&nbsp;Financial&nbsp;"))
		      .addElement(new Option("Education")
			.addElement("&nbsp;Education&nbsp;"))
		      .addElement(new Option("Government")
			.addElement("&nbsp;Government&nbsp;"))
		      .addElement(new Option("Research")
			.addElement("&nbsp;Research&nbsp;"))
		      .addElement(new Option("Unknown")
			.addElement("&nbsp;Other&nbsp;"))))))))
	  .addElement(new TR()
	    .addElement(new TD("Mailing address:").setColSpan(4)))
	  .addElement(new TR()
	    .addElement(new TD().setColSpan(4)
	      .addElement(new Table()
		.addElement(new TR()
		  .addElement(new TD("&nbsp;"))
		  .addElement(new TD("Street"))
		  .addElement(new TD()
		    .addElement(inStreet = new Input(Input.text, "street", "")
		      .setSize(20)))
		  .addElement(new TD("City"))
		  .addElement(new TD()
		    .addElement(inCity = new Input(Input.text, "city", "")
		      .setSize(20))))
		.addElement(new TR()
		  .addElement(new TD())
		  .addElement(new TD("State"))
		  .addElement(new TD()
		    .addElement(inState = new Input(Input.text, "state", "")
		      .setSize(20)))
		  .addElement(new TD("Country"))
		  .addElement(new TD()
		    .addElement(inCountry = new Input(Input.text, "country", "")
		      .setSize(20))))
		.addElement(new TR()
		  .addElement(new TD())
		  .addElement(new TD("Postal Code"))
		  .addElement(new TD()
		    .addElement(inPostalCode = new Input(Input.text, "postal", "")
		      .setSize(20)))))))
	  .addElement(new TR()
	    .addElement(new TD("Interest areas:").setColSpan(4))) 
	  .addElement(new TR()
	    .addElement(new TD().setColSpan(4)
	      .addElement(new Table()
		.addElement(new TR()
		  .addElement(new TD("&nbsp;"))
		  .addElement(new TD()
		    .addElement(cbServlets = new Input(Input.checkbox, "interests", "Servlets")
		      .addElement("&nbsp;Servlets&nbsp;")))
		  .addElement(new TD()
		    .addElement(cbJSP = new Input(Input.checkbox, "interests", "JSP")
		      .addElement("&nbsp;JSP&nbsp;")))
		  .addElement(new TD()
		    .addElement(cbEJB = new Input(Input.checkbox, "interests", "EJB")
		      .addElement("&nbsp;EJB&nbsp;")))
		  .addElement(new TD()
		    .addElement(cbJDBC = new Input(Input.checkbox, "interests", "JDBC")
		      .addElement("&nbsp;JDBC&nbsp;"))))
		.addElement(new TR()
		  .addElement(new TD("&nbsp;"))
		  .addElement(new TD()
		    .addElement(cbJavaMail = new Input(Input.checkbox, "interests", "JavaMail")
		      .addElement("&nbsp;JavaMail&nbsp;")))
		  .addElement(new TD()
		    .addElement(cbJNDI = new Input(Input.checkbox, "interests", "JNDI")
		      .addElement("&nbsp;JNDI&nbsp;")))
		  .addElement(new TD()
		    .addElement(cbJMS = new Input(Input.checkbox, "interests", "JMS")
		      .addElement("&nbsp;JMS&nbsp;")))
		  .addElement(new TD()
		    .addElement(cbJTA = new Input(Input.checkbox, "interests", "JTA")
		      .addElement("&nbsp;JTA&nbsp;"))))
		.addElement(new TR()
		  .addElement(new TD("&nbsp;"))
		  .addElement(new TD()
		    .addElement(cbJTS = new Input(Input.checkbox, "interests", "JTS")
		      .addElement("&nbsp;JTS&nbsp;")))
		  .addElement(new TD()
		    .addElement(cbIDL = new Input(Input.checkbox, "interests", "IDL")
		      .addElement("&nbsp;IDL&nbsp;")))
		  .addElement(new TD()
		    .addElement(cbRMI = new Input(Input.checkbox, "interests", "RMI-IIOP")
		      .addElement("&nbsp;RMI-IIOP&nbsp;")))
		  .addElement(new TD()
		    .addElement(cbConnector = new Input(Input.checkbox, "interests", "J2EE Connector")
		      .addElement("&nbsp;J2EE Connector&nbsp;")))))))
	  .addElement(new TR()
	    .addElement(new TD("Comments:").setColSpan(4)))
	  .addElement(new TR()
	    .addElement(new TD().setColSpan(4)
	      .addElement(taComments = new TextArea("comments", 3, 80))))
	  .addElement(new TR()
	    .addElement(new TD().setColSpan(2)
	      .addElement(new Input(Input.submit, "submit", "Register"))))
	  .addElement(new TR()
	    .addElement(new TD().setColSpan(2)
	      .addElement("* Indicates required fields."))));

      if ("Mrs.".equals(salutation)) { 
	rbMrs.setChecked(true);
      } else if ("Ms.".equals(salutation)) { 
	rbMs.setChecked(true);
      } else if ("Dr.".equals(salutation)) { 
	rbDr.setChecked(true);
      } else {
	rbMr.setChecked(true);
      }
      if (firstName != null) { 
	inFirstName.setValue(firstName);
      }
      if (lastName != null) { 
	inLastName.setValue(lastName);
      }
      if (email != null) { 
	inEmail.setValue(email);
      }
      if (company != null) { 
	inCompany.setValue(company);
      }
      if (street != null) { 
	inStreet.setValue(street);
      } 
      if (city != null) { 
	inCity.setValue(city);
      }
      if (state != null) { 
	inState.setValue(state);
      }
      if (country != null) { 
	inCountry.setValue(country);
      }
      if (postalCode != null) { 
	inPostalCode.setValue(postalCode);
      }
      if (interests != null) { 
	for (int i = 0; i < interests.length; i++) { 
	  if (interests[i].equals("Servlets")) { 
	    cbServlets.setChecked(true); 
	  } else if (interests[i].equals("JSP")) { 
	    cbJSP.setChecked(true); 
	  } else if (interests[i].equals("EJB")) { 
	    cbEJB.setChecked(true); 
	  } else if (interests[i].equals("JDBC")) { 
	    cbJDBC.setChecked(true); 
	  } else if (interests[i].equals("JavaMail")) { 
	    cbJavaMail.setChecked(true); 
	  } else if (interests[i].equals("JNDI")) { 
	    cbJNDI.setChecked(true); 
	  } else if (interests[i].equals("JMS")) { 
	    cbJMS.setChecked(true); 
	  } else if (interests[i].equals("JTA")) { 
	    cbJTA.setChecked(true); 
	  } else if (interests[i].equals("JTS")) { 
	    cbJTS.setChecked(true); 
	  } else if (interests[i].equals("IDL")) { 
	    cbIDL.setChecked(true); 
	  } else if (interests[i].equals("RMI-IIOP")) { 
	    cbRMI.setChecked(true); 
	  } else if (interests[i].equals("J2EE Connector")) { 
	    cbConnector.setChecked(true); 
	  }
	}
      }
      return form; 
    }

    /**
     *   Retrieves the values posted from the HTML form and assigns the values 
     *   to the corresponding fields of the RegistrationForm object. 
     *
     * @param request the HTTP request 
     */ 
    void fillForm(HttpServletRequest request) { 
      salutation = request.getParameter("salutation");
      firstName = request.getParameter("firstname");      
      if (firstName != null) { 
	firstName = firstName.trim();
      }
      lastName = request.getParameter("lastname");
      if (lastName != null) { 
	lastName = lastName.trim();
      }
      email = request.getParameter("email");
      if (email != null) { 
	email = email.trim();
      }
      company = request.getParameter("company");
      if (company != null) { 
	company = company.trim();
      }
      business = request.getParameter("business");
      if (business != null) { 
	business = business.trim();
      }
      street = request.getParameter("street");
      if (street != null) { 
	street = street.trim();
      }
      city = request.getParameter("city");
      if (city != null) { 
	city = city.trim();
      }
      state = request.getParameter("state");
      if (state != null) { 
	state = state.trim();
      }
      country = request.getParameter("country");
      if (country != null) { 
	country = country.trim();
      }
      postalCode = request.getParameter("postal");
      if (postalCode != null) { 
	postalCode = postalCode.trim();
      }
      comments = request.getParameter("comments");
      if (comments != null) { 
	comments = comments.trim();
      }
      interests = request.getParameterValues("interests");
    }

    /** 
     *  Checks whether all the required fields contains non-null values. 
     *  Returns null if all the required fields contains non-null values. 
     *  Otherwise, returns an array of the names of the required fields that contains
     *    null values.  
     *
     * @return an array of missing field names. 
     */ 
    String[] validateForm() { 
      List missing = new ArrayList(); 
      if (firstName == null ||
	  firstName.length() == 0) { 
	missing.add("first name"); 	
      }
      if (lastName == null ||
	  lastName.length() == 0) { 
	missing.add("last name"); 	
      }
      if (email == null ||
	  email.length() == 0) { 
	missing.add("email"); 	
      }
      if (missing.size() > 0) { 
	String[] arr = new String[missing.size()]; 
	for (int i = 0; i < missing.size(); i++) { 
	  arr[i] = (String) missing.get(i); 
	}
	return arr; 
      }
      return null;
    }

    /**
     *   Builds a HTML page that confirms the registration. 
     *
     * @return a list of HTML elements.  
     */ 
    List processForm() { 
      List contents = new ArrayList(); 
      contents.add(new H1("Thank you! Your registration is confirmed.")); 

      contents.add(salutation + " " + firstName + " " + lastName);
      contents.add(new BR());
      contents.add(company);
      contents.add(new BR());
      contents.add(street);
      contents.add(new BR());
      contents.add(city + " " + state + " " + postalCode);
      contents.add(new BR());
      contents.add(country);
      contents.add(new BR());
      contents.add("Email: " + email);
      contents.add(new BR());
      contents.add("Primary area of business: " + business);
      contents.add(new BR());
      contents.add("Interest areas");

      if (interests != null) { 
	UL list = new UL(); 
	for (int i = 0; i < interests.length; i++) { 
	  list.addElement(new LI(interests[i]));
	}
	contents.add(list);
      } 

      contents.add("Commetns: " + comments);
      return contents;
    }

  }

}