HtmlLevelDataProvider.java :  » Game » jaro » com » robestone » jaro » Android Open Source

package com.robestone.jaro;

import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class HtmlLevelDataProvider implements LevelDataProvider {

  private List<LevelData> data = new ArrayList<LevelData>();
  private Pattern filePattern = Pattern.compile("<table class=\"level \\d+\">(.*?)</table>");
  private Pattern linePattern = Pattern.compile("<td>(.*?)</td>");
  private Pattern imgPattern = Pattern.compile("/drawable/(.*?)\\.png");
  
  public void load(InputStream in) {
    load(getHtmlData(in));
  }
  private static String getHtmlData(InputStream in) {
    StringBuilder buf = new StringBuilder();
    int r = 0;
    try {
      while ((r = in.read()) >= 0) {
        buf.append((char) r);
      }
    } catch (IOException e) {
      return null;
    }
    String s = buf.toString();
    s = s.replaceAll("<td/>", "<td></td>");
    return s;
  }
  public HtmlLevelDataProvider() {
  }
  public void load(String htmlData) {
    data.addAll(parse(htmlData));
  }
  
  public List<LevelData> parse(String htmlData) {
    List<LevelData> data = new ArrayList<LevelData>();
    
    htmlData = htmlData.replaceAll("[\\n\\r]", "");
    Matcher m = filePattern.matcher(htmlData);
    while (m.find()) {
      LevelData d = parseOne(m.group(1));
      data.add(d);
    }
    
    return data;
  }
  
  public LevelData parseOne(String htmlData) {
    int cols = getCols(htmlData);
    int totalCells = 0;
    StringBuilder buf = new StringBuilder();
    
    Matcher m = linePattern.matcher(htmlData);
    while (m.find()) {
      String img = m.group(1);
      Matcher im = imgPattern.matcher(img);
      // this is matching images in the TD
      // if there is no match, it means no image, but there's still a cell there
      if (im.find()) {
        String id = im.group(1);
        id = cleanKey(id);
        buf.append("|");
        buf.append(id);
      } else {
        buf.append("| ");
      }
      totalCells++;
    }
    int rows = totalCells / cols;
    return new LevelData(buf.toString(), cols, rows);
  }
  private String cleanKey(String k) {
    char c = k.charAt(k.length() - 1);
    if (Character.isDigit(c)) {
      k = k.substring(0, k.length() - 1);
    }
    return k;
  }
  private int getCols(String htmlData) {
    int cols = 0;
    int pos = htmlData.indexOf("<tr>");
    int pos2 = htmlData.indexOf("</tr>");
    String sub = htmlData.substring(pos, pos2);
    while (pos >= 0) {
      pos = sub.indexOf("<td>", pos + 1);
      cols++;
    }
    return cols - 1;
  }
  
  @Override
  public int getLastLevelIndex() {
    return data.size() - 1;
  }

  @Override
  public LevelData getLevelData(int levelIndex) {
    return data.get(levelIndex);
  }
}