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


/**
 * A simple conveience class for taking care of drawing 
 * static HTML pages or static HTML pages with a few simple
 * tags.
 */
public class Template {

    String template;

    public Template(String filename) throws IOException {
	String line;
	StringBuffer complete = new StringBuffer();
	BufferedReader reader =
	    new BufferedReader(new FileReader(filename));
	while((line = reader.readLine()) != null) {
	    complete.append(line);
	    complete.append("\n");
	}
	reader.close();
	template = complete.toString();
    }

    public void substitute(String tag, String replacement) {
	substitute(tag, replacement, false);
    }

    public void substitute(String tag, int replacement) {
	substitute(tag, String.valueOf(replacement), false);
    }

    public void substitute(String tag, double replacement) {
	substitute(tag, String.valueOf(replacement), false);
    }

    public void substitute(String tag, int replacement, boolean all) {
	substitute(tag, String.valueOf(replacement), all);
    }


    public void substitute(String tag, double replacement, boolean all) {
	substitute(tag, String.valueOf(replacement), all);
    }

    public void substitute(String tag, String replacement, boolean all) {
	String fulltag = "[" + tag + "]";
	int tagIndex = template.indexOf(fulltag);
	while (tagIndex != -1) {
	    template = template.substring(0, tagIndex) +
		replacement +
		template.substring(tagIndex + fulltag.length());
	    if (!all) break;
	    tagIndex = template.indexOf(fulltag);
	}
    }

    public String toString() {
	return template;
    }
}