// generated by Dynamator Wed Mar 31 19:16:32 CST 2004

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Dictionary;
import java.util.Hashtable;
import java.util.Vector;

import javax.servlet.http.*;

public class Guestbook
extends HttpServlet
{
    // following is identical to JSP

    private static
    class Entry
    {
        private String name_;
        private String comment_;
        
        public 
        Entry(
            String name,
            String comment
            )
        {
            name_ = name;
            comment_ = comment;
        }

        public String name()    { return name_; }
        public String comment() { return comment_; }
    }
    
    private static final Vector entries = new Vector();
    static
    {
        entries.addElement(new Entry("Socrates", "To do is to be"));
        entries.addElement(new Entry("Plato",    "To be is to do"));
        entries.addElement(new Entry("Sinatra",  "Do be do be do"));
    }
    
    private static final
    String
    safeTrim(
        String s
        )
    {
        return s == null ? s : s.trim();
    }
    
    // above is identical to JSP

    public 
    void
    doGet(
        HttpServletRequest request,
        HttpServletResponse response
        )
    throws IOException
    {
        response.setContentType("text/html");
        PrintWriter out = response.getWriter();
        output(request, response, out);
        out.flush();
        out.close();
    }

    public 
    void
    doPost(
        HttpServletRequest request,
        HttpServletResponse response
        )
    throws IOException
    {
        response.setContentType("text/html");
        PrintWriter out = response.getWriter();
        output(request, response, out);
        out.flush();
        out.close();
    }
    
    public static 
    void 
    output(
        HttpServletRequest request,
        HttpServletResponse response,
        PrintWriter out
        )
    {
        // following is identical to JSP
        String name = "";
        String comment = "";
        Dictionary fieldErrors = new Hashtable();
        String pageMessage = null;

        if ( "POST".equals(request.getMethod()) )
        {
            name = safeTrim(request.getParameter("name"));
            comment = safeTrim(request.getParameter("comment"));
            
            if ( name == null || name.length() == 0 )
            {
                fieldErrors.put("name", "Please enter your name");
            }
            
            if ( comment == null || comment.length() == 0 )
            {
                fieldErrors.put("comment", "Please enter a comment");
            }

            if ( fieldErrors.isEmpty() )
            {
                entries.addElement(new Entry(name, comment));
                pageMessage = "Thank you for signing my guestbook!";
                name = "";
                comment = "";
            }
            else
            {
                pageMessage = "Please correct the items below";
            }
        }
        // above is identical to JSP
        out.write("<!-- \n");
        out.write("    This example demonstrates two things: simple form handling\n");
        out.write("    and basic demonstration site behavior.\n");
        out.write("    \n");
        out.write("    The standard form interaction pattern for a demo site is:\n");
        out.write("        1.  System displays the form\n");
        out.write("        2.  User submits the form (no data entry required)        \n");
        out.write("        3.  System displays the form again with a sample error message.\n");
        out.write("        4.  User submits the form again (no data entry required)\n");
        out.write("        5.  System displays the form again with a success message,\n");
        out.write("            or displays the next page.\n");
        out.write("\n");
        out.write("    Form pages in a demo site therefore have three possible states:\n");
        out.write("        - initial\n");
        out.write("        - error\n");
        out.write("        - success (optional)\n");
        out.write("        \n");
        out.write("    The query parameter can be used to determine state:\n");
        out.write("        - initial: (empty)\n");
        out.write("        - error:   '?error'\n");
        out.write("        - success: '?success'\n");
        out.write("\n");
        out.write("    Message display is handled using Javascript and CSS.\n");
        out.write("    Javascript is used to set and query the state of the page \n");
        out.write("    and to write message text and CSS.  CSS is used to control whether\n");
        out.write("    a message is displayed, and its color if it is displayed.\n");
        out.write("\n");
        out.write("    In production, there is no need to pass the state as a query\n");
        out.write("    parameter since it is known at the server side as a byproduct of\n");
        out.write("    request processing.  All the demo site Javascript is removed\n");
        out.write("    (class=\"Discard\").  Message presence and content should be\n");
        out.write("    controlled programmatically at the server side, not via CSS and\n");
        out.write("    Javascript.\n");
        out.write("\n");
        out.write("    This demo is self-contained; a real demo site would externalize\n");
        out.write("    common CSS and Javascript into separate files.\n");
        out.write("--><!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 Transitional//EN\">\n");
        out.write("<html>\n");
        out.write("  <head>\n");
        out.write("    <meta http-equiv=\"Content-Type\" content=\"text/html; charset=iso-8859-1\">\n");
        out.write("    <meta http-equiv=\"Content-Language\" content=\"en-us\">\n");
        out.write("    <title>My Guestbook</title>\n");
        out.write("    <!-- \n");
        out.write("        ============================================================\n");
        out.write("        Site-wide CSS. \n");
        out.write("        This would normally be an external file so it could be\n");
        out.write("        reused across the site.\n");
        out.write("        ============================================================ \n");
        out.write("    -->\n");
        out.write("    <style type=\"text/css\">\n");
        out.write("      *\n");
        out.write("      {\n");
        out.write("          font-family: verdana;\n");
        out.write("          font-size: 10pt;\n");
        out.write("      }\n");
        out.write("      h1\n");
        out.write("      {\n");
        out.write("          font-size: 14pt;\n");
        out.write("          text-align: center;\n");
        out.write("      }\n");
        out.write("      th\n");
        out.write("      {\n");
        out.write("          background-color: #eeeeee;\n");
        out.write("          color:#333333;\n");
        out.write("          font-family: verdana, sans-serif;\n");
        out.write("          font-size: 9pt;\n");
        out.write("          font-weight: bold;\n");
        out.write("          vertical-align: bottom;\n");
        out.write("      }\n");
        out.write("      form table\n");
        out.write("      {\n");
        out.write("          background-color: #eeeeee;\n");
        out.write("      }\n");
        out.write("      \n");
        out.write("      .errorContainer\n");
        out.write("      {\n");
        out.write("          background-color:#ff6600;\n");
        out.write("      }\n");
        out.write("      .errorMessage\n");
        out.write("      {\n");
        out.write("          background-color:#ffee99;\n");
        out.write("          color: #ff6600;\n");
        out.write("          font-weight: bold;\n");
        out.write("      }\n");
        out.write("      \n");
        out.write("      .successContainer\n");
        out.write("      {\n");
        out.write("          background-color:#0099cc;\n");
        out.write("      }\n");
        out.write("      .successMessage\n");
        out.write("      {\n");
        out.write("          background-color:#ccffee;\n");
        out.write("          color:#0099cc;\n");
        out.write("          font-weight: bold;\n");
        out.write("      }\n");
        out.write("    </style>\n");
        out.write("  </head>\n");
        out.write("  <body bgcolor=\"#ffffff\">\n");
        out.write("    <h1>My Guestbook</h1>\n");
        out.write("    <!-- \n");
        out.write("        ============================================================\n");
        out.write("        this is the page message area.  \n");
        out.write("        It is always displayed, although normally it is empty.\n");
        out.write("        Its color is determined by status.\n");
        out.write("        ============================================================\n");
        out.write("    -->\n");
        out.write("    <table class=\"");
            out.write(String.valueOf(! fieldErrors.isEmpty()
                  ? "errorContainer"
                  : (pageMessage != null
                    ? "successContainer"
                    : "emptyMessageContainer")));
            out.write("\" align=\"center\" border=\"0\" cellpadding=\"5\" cellspacing=\"1\">\n");
        out.write("      <tr>\n");
        out.write("        <td class=\"");
            out.write(String.valueOf(! fieldErrors.isEmpty()
                  ? "errorMessage"
                  : (pageMessage != null
                    ? "successMessage"
                    : "emptyMessage")));
            out.write("\">");
            out.write(String.valueOf(pageMessage != null ? pageMessage : "&nbsp;"));
            out.write("</td>\n");
        out.write("      </tr>\n");
        out.write("    </table>\n");
        out.write("    <!-- \n");
        out.write("          ============================================================\n");
        out.write("          Data entry.\n");
        out.write("          ============================================================\n");
        out.write("      -->\n");
        out.write("    <form name=\"add\" action=\"");
            out.write(String.valueOf(request.getRequestURI()));
            out.write("\" method=\"POST\">\n");
        out.write("      <table align=\"center\" border=\"1\" cellpadding=\"0\" cellspacing=\"1\">\n");
        out.write("        <tr>\n");
        out.write("          <td>\n");
        out.write("            <table border=\"0\" cellpadding=\"5\" cellspacing=\"0\">\n");
        if ( fieldErrors.get("name") != null ) 
        {
            out.write("              <tr class=\"errorContainer\">\n");
            out.write("                <td id=\"DynNameMessage\" class=\"errorMessage\" align=\"center\" colspan=\"2\">Please enter your name.</td>\n");
            out.write("              </tr>");
        }
        out.write("<tr>\n");
        out.write("                <td align=\"right\">Your&nbsp;Name:</td>\n");
        out.write("                <td align=\"left\"><input name=\"name\" value=\"");
            out.write(String.valueOf(name));
            out.write("\" size=\"50\"></td>\n");
        out.write("              </tr>\n");
        if ( fieldErrors.get("comment") != null ) 
        {
            out.write("              <tr class=\"errorContainer\">\n");
            out.write("                <td id=\"DynCommentMessage\" class=\"errorMessage\" align=\"center\" colspan=\"2\">Please enter a comment.</td>\n");
            out.write("              </tr>");
        }
        out.write("<tr>\n");
        out.write("                <td align=\"right\">Your&nbsp;Comment:</td>\n");
        out.write("                <td align=\"left\"><textarea name=\"comment\" rows=\"5\" cols=\"50\">");
            out.write(String.valueOf(comment));
            out.write("</textarea></td>\n");
        out.write("              </tr>\n");
        out.write("              <tr>\n");
        out.write("                <td align=\"center\" colspan=\"2\"><br>\n");
        out.write("                  <input type=\"submit\" name=\"action\" class=\"submit\" value=\"Add your entry!\"> </td>\n");
        out.write("              </tr>\n");
        out.write("            </table>\n");
        out.write("          </td>\n");
        out.write("        </tr>\n");
        out.write("      </table>\n");
        out.write("    </form>\n");
        out.write("    <hr>\n");
        out.write("    <!-- \n");
        out.write("        ============================================================\n");
        out.write("        Data display.  \n");
        out.write("        In a normal app this might be on a separate page.\n");
        out.write("        ============================================================\n");
        out.write("    -->\n");
        out.write("    <h1>Guest Comments</h1>\n");
        out.write("    <table align=\"center\" border=\"1\" cellpadding=\"5\" cellspacing=\"0\" width=\"50%\">\n");
        out.write("      <tr>\n");
        out.write("        <th>Name</th>\n");
        out.write("        <th>Comment</th>\n");
        out.write("      </tr>\n");
        {
            final java.util.Vector $entries = entries;
            final int lim$entries = $entries.size();
            Entry entry;
            for ( int i$entries = 0; i$entries < lim$entries; ++i$entries )
            {
                entry = (Entry) $entries.elementAt(i$entries);
                out.write("      <tr>\n");
                out.write("        <td>");
                    out.write(String.valueOf(entry.name()));
                    out.write("</td>\n");
                out.write("        <td>");
                    out.write(String.valueOf(entry.comment()));
                    out.write("</td>\n");
                out.write("      </tr>\n");

            }
        }
        out.write("      <!--\n");
        out.write("          The first two \"quotes\" above have also been attributed to various\n");
        out.write("          other sources (Voltaire, Descartes, Sartre).\n");
        out.write("          \n");
        out.write("          The only one that everyone seems to agree on is the last ;-).\n");
        out.write("      -->\n");
        out.write("    </table>\n");
        out.write("  </body>\n");
        out.write("</html>\n");

    }
}