/*
    * Licensed under the GPL License. You may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    *   https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
    *
    * THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
    * WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
    * PURPOSE.
   */
  package psiprobe.jsp;
  
  import java.io.IOException;
  
  import javax.servlet.jsp.JspException;
  import javax.servlet.jsp.tagext.TagSupport;
  
  /**
   * Silly JSP tag to display duration in milliseconds as hours:minutes:seconds.milliseconds
   */
  public class DurationTag extends TagSupport {
  
    /** The Constant serialVersionUID. */
    private static final long serialVersionUID = 1L;
  
    /** The value. */
    private long value;
  
    /**
     * Sets the value.
     *
     * @param value the new value
     */
    public void setValue(long value) {
      this.value = value;
    }
  
    @Override
    public int doStartTag() throws JspException {
      try {
        pageContext.getOut().write(duration(value));
      } catch (IOException e) {
        throw new JspException("Exception writing duration to JspWriter", e);
      }
      return EVAL_BODY_INCLUDE;
    }
  
    /**
     * Duration.
     *
     * @param value the value
     *
     * @return the string
     */
    public static String duration(long value) {
      long millis = value % 1000;
      long sec = value / 1000;
      long mins = sec / 60;
      long hours = mins / 60;
  
      sec = sec % 60;
      mins = mins % 60;
  
      return hours + ":" + long2Str(mins) + ":" + long2Str(sec) + "." + long3Str(millis);
    }
  
    /**
     * Long2 str.
     *
     * @param value the value
     *
     * @return the string
     */
    private static String long2Str(long value) {
      return value < 10 ? "0" + value : Long.toString(value);
    }
  
    /**
     * Long3 str.
     *
     * @param value the value
     *
     * @return the string
     */
    private static String long3Str(long value) {
      if (value < 10) {
        return "00" + value;
      }
      if (value < 100) {
        return "0" + value;
      }
      return Long.toString(value);
    }
  
  }