/*
 * refactoring input example from 
 * http://www.informit.com/articles/article.aspx?p=167891&seqNum=1
 * "What Is Refactoring?" by William C. Wake.
 *
 */


import java.io.*;
import java.util.*;

/** Replace %CODE% with requested id, and
 **  replace %ALTCODE% w/"dashed" version of id.
 */
public class CodeReplacer {
  public final String TEMPLATE_DIR = "templatedir";
  String sourceTemplate;
  String code;
  String altcode;

  /**
   * @param reqId java.lang.String
   * @param oStream java.io.OutputStream
   * @exception java.io.IOException The exception description.
   */
  public void substitute(String reqId, PrintWriter out) 
      throws IOException
    {
      // Read in the template file
      String templateDir = System.getProperty(TEMPLATE_DIR, "");
      StringBuffer sb = new StringBuffer("");
      try {
	FileReader fr = new FileReader(templateDir +
				       "template.html");
	BufferedReader br = new BufferedReader(fr);
	String line;
	while(((line=br.readLine())!="") && line!=null) 
	  sb = new StringBuffer(sb + line + "\n");
	br.close();
	fr.close();
      } catch (Exception e) {
      }
      sourceTemplate = new String(sb);

      try {
	String template = new String(sourceTemplate);
	// Substitute for %CODE%
	int templateSplitBegin = template.indexOf("%CODE%");
	int templateSplitEnd = templateSplitBegin + 6;
	String templatePartOne = new String(
					    template.substring(0, templateSplitBegin));

	String templatePartTwo = new String(
					    template.substring(templateSplitEnd,
							       template.length()));
	code = new String(reqId);
	template = new String(
			      templatePartOne+code+templatePartTwo);

	// Substitute for %ALTCODE%
	templateSplitBegin = template.indexOf("%ALTCODE%");
	templateSplitEnd = templateSplitBegin + 9;
	templatePartOne = new String(
				     template.substring(0, templateSplitBegin));
	templatePartTwo = new String(
				     template.substring(templateSplitEnd,
							template.length()));
	altcode = code.substring(0,5) + "-" +
	    code.substring(5,8);
	out.print(templatePartOne+altcode+templatePartTwo);
      } catch (Exception e) {
	System.out.println("Error in substitute()");
      }
      out.flush();
      out.close();
    }
}