/**
    * Logback: the reliable, generic, fast and flexible logging framework.
    * Copyright (C) 1999-2011, QOS.ch. All rights reserved.
    *
    * This program and the accompanying materials are dual-licensed under
    * either the terms of the Eclipse Public License v1.0 as published by
    * the Eclipse Foundation
    *
    *   or (per the licensee's choosing)
   *
   * under the terms of the GNU Lesser General Public License version 2.1
   * as published by the Free Software Foundation.
   */
  package ch.qos.logback.access.html;
  
  import static ch.qos.logback.core.CoreConstants.LINE_SEPARATOR;
  
  import java.util.Map;
  
  import ch.qos.logback.access.PatternLayout;
  import ch.qos.logback.access.spi.IAccessEvent;
  import ch.qos.logback.core.html.HTMLLayoutBase;
  import ch.qos.logback.core.pattern.Converter;
  
  /**
   * 
   * HTMLLayout outputs events in an HTML table. 
   * <p>
   * The content of the table columns are specified using a conversion pattern. 
   * See {@link ch.qos.logback.access.PatternLayout} for documentation on the
   * available patterns.
   * <p>
   * For more information about this layout, please refer to the online manual at
   * http://logback.qos.ch/manual/layouts.html#AccessHTMLLayout
   * 
   * 
   * @author Ceki G&uuml;lc&uuml;
   * @author S&eacute;bastien Pennec
   */
  public class HTMLLayout extends HTMLLayoutBase<IAccessEvent> {
  
    /**
     * Default pattern string for log output.
     */
    static final String DEFAULT_CONVERSION_PATTERN = "%h%l%u%t%r%s%b";
  
    /**
     * Constructs a PatternLayout using the DEFAULT_LAYOUT_PATTERN.
     * 
     */
    public HTMLLayout() {
      pattern = DEFAULT_CONVERSION_PATTERN;
      cssBuilder = new DefaultCssBuilder();  
    }
    
    @Override
    protected Map<String, String> getDefaultConverterMap() {
      return PatternLayout.defaultConverterMap;
    }
  
    public String doLayout(IAccessEvent event) {
      StringBuilder buf = new StringBuilder();
      startNewTableIfLimitReached(buf);
  
      boolean odd = true;
      if (((counter++) & 1) == 0) {
        odd = false;
      }
  
      buf.append(LINE_SEPARATOR);
      buf.append("<tr class=\"");
      if (odd) {
        buf.append(" odd\">");
      } else {
        buf.append(" even\">");
      }
      buf.append(LINE_SEPARATOR);
  
      Converter<IAccessEvent> c = head;
      while (c != null) {
        appendEventToBuffer(buf, c, event);
        c = c.getNext();
      }
      buf.append("</tr>");
      buf.append(LINE_SEPARATOR);
  
      return buf.toString();
    }
  
    private void appendEventToBuffer(StringBuilder buf, Converter<IAccessEvent> c,
        IAccessEvent event) {
      buf.append("<td class=\"");
      buf.append(computeConverterName(c));
      buf.append("\">");
      c.write(buf, event);
      buf.append("</td>");
      buf.append(LINE_SEPARATOR);
    }
  }