/*
 * File    : StrUtils.java
 * Created : 17-may-2004 19:50
 * By      : fbusquets
 *
 * JClic - Authoring and playing system for educational activities
 *
 * Copyright (C) 2000 - 2005 Francesc Busquets & Departament
 * d'Educacio de la Generalitat de Catalunya
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details (see the LICENSE file).
 */
package edu.xtec.util;

import java.util.ArrayList;
import java.util.List;
import java.util.StringTokenizer;

/**
 *
 * @author Francesc Busquets (fbusquets@xtec.cat)
 * @version 13.09.23
 */
public abstract class StrUtils {

  public static void strToIntArray(String str, int[] intArray) {
    if (str == null || intArray == null) {
      return;
    }
    int i = 0;
    StringTokenizer st = new StringTokenizer(str, ",", false);
    while (st.hasMoreTokens() && i < intArray.length) {
      try {
        intArray[i] = Integer.parseInt(st.nextToken().trim());
      } catch (Exception e) {
      }
      i++;
    }
  }

  public static void strToPoint(String str, java.awt.Point pt) {
    int[] values = new int[2];
    strToIntArray(str, values);
    pt.x = values[0];
    pt.y = values[1];
  }

  public static void strToDimension(String str, java.awt.Dimension d) {
    int[] values = new int[2];
    strToIntArray(str, values);
    d.width = values[0];
    d.height = values[1];
  }

  public static void strToRect(String str, java.awt.Rectangle r) {
    int[] values = new int[4];
    strToIntArray(str, values);
    r.setBounds(values[0], values[1], values[2], values[3]);
  }

  public static String[] strToStrArray(String source, String separator) {
    if (source == null || separator == null) {
      return null;
    }
    StringTokenizer st = new StringTokenizer(source, separator, true);
    List<String> v = new ArrayList<String>();
    while (st.hasMoreTokens()) {
      String s = st.nextToken();
      if (separator.equals(s)) {
        v.add(new String());
      } else {
        v.add(s);
        if (st.hasMoreTokens()) {
          st.nextToken();
        }
      }
    }
    return v.toArray(new String[v.size()]);
  }

  public static String[] strToStrArrayNoNulls(String source, String separator) throws Exception {
    String[] result = strToStrArray(source, separator);
    if (result == null || result.length == 0) {
      throw new Exception("Invalid parameter: " + source);
    }
    for (String s : result) {
      if (s == null || s.length() == 0) {
        throw new Exception("Invalid parameter: " + source);
      }
    }
    return result;
  }

  public static byte[] extractByteSeq(byte[] data, int line, byte searchFor, byte changeTo) {

    byte[] result = null;
    int l = data.length;
    int k = 0;
    int p0 = 0, p1 = 0;

    for (int i = 0; i < l; i++) {
      if (data[i] == 0x0D) {
        if (i < l && data[i + 1] == 0x0A) {
          p0 = p1 == 0 ? p1 : p1 + 2;
          p1 = i;
          if (k == line) {
            break;
          }
          k++;
        }
      }
    }

    if (p1 > p0) {
      int j = p1 - p0;
      result = new byte[j];
      for (int i = 0; i < j; i++) {
        result[i] = data[p0 + i];
        if (result[i] == searchFor) {
          result[i] = changeTo;
        }
      }
    }

    return result;
  }

  public static int roundTo(double v, int n) {
    return ((int) (v / n)) * n;
  }

  public static int countSpaces(String tx) {
    String t = tx.trim();
    int j = 0;
    for (char ch : t.toCharArray()) {
      if (ch == ' ') {
        j++;
      }
    }
    return j;
  }

  public static boolean compareStringsIgnoreCase(String s1, String s2) {
    if (s1 == null && s2 == null) {
      return true;
    }
    if (s1 == null || s2 == null) {
      return false;
    }
    return s1.compareToIgnoreCase(s2) == 0;
  }

  public static boolean compareTrimStringsIgnoreCase(Object s1, Object s2) {
    if (s1 == null) {
      s1 = "";
    }
    if (s2 == null) {
      s2 = "";
    }
    return s1.toString().trim().compareToIgnoreCase(s2.toString().trim()) == 0;
  }

  public static boolean compareObjects(Object o1, Object o2) {
    if (o1 == null && o2 == null) {
      return true;
    }
    if (o1 == null || o2 == null) {
      return false;
    }
    return o1.equals(o2);
  }

  public static String replace(String str, String pattern, String replace) {
    int s = 0;
    if (str == null) {
      str = "";
    }
    StringBuilder result = new StringBuilder();

    int e;
    while ((e = str.indexOf(pattern, s)) >= 0) {
      result.append(str.substring(s, e));
      if (replace != null) {
        result.append(replace);
      }
      s = e + pattern.length();
    }
    result.append(str.substring(s));
    return result.substring(0);
  }

  public static String replace(String str, String pattern, String[] replace) {
    int s = 0;
    if (str == null) {
      str = "";
    }
    StringBuilder result = new StringBuilder();

    int e, i = 0;
    while ((e = str.indexOf(pattern, s)) >= 0) {
      result.append(str.substring(s, e));
      if (replace != null) {
        result.append(replace[i++ % replace.length]);
      }
      s = e + pattern.length();
    }
    result.append(str.substring(s));
    return result.substring(0);
  }

  public static boolean compareMultipleOptions(String answer, String check, boolean checkCase) {
    if (answer == null || answer.length() == 0 || check == null || check.length() == 0) {
      return false;
    }
    StringTokenizer st = new StringTokenizer(check, "|");
    while (st.hasMoreTokens()) {
      if (checkCase ? st.nextToken().equals(answer)
              : st.nextToken().equalsIgnoreCase(answer)) {
        return true;
      }
    }
    return false;
  }

  public static String secureString(Object data) {
    if (data == null) {
      return new String();
    }
    return data.toString();
  }

  public static String secureString(Object data, String defaultValue) {
    String result = nullableString(data);
    return result == null ? defaultValue : result;
  }

  public static String nullableString(Object o) {
    String result = null;
    if (o != null) {
      result = o.toString().trim();
      if (result.length() == 0) {
        result = null;
      }
    }
    return result;
  }

  public static String trimEnding(String str) {
    String result = str;
    if (result != null) {
      int p = result.length() - 1;
      int p0 = p;
      while (p >= 0) {
        char ch = result.charAt(p);
        if (ch == ' ' || ch == '\n' || ch == '\r') {
          p--;
        } else {
          break;
        }
      }
      if (p != p0) {
        result = result.substring(0, p + 1);
      }
    }
    return result;
  }

  public static String secureSQLString(String data) {
    return replace(secureString(data), "'", "''");
  }

  public static int getAbsIntValueOf(String s) {
    int result = -1;
    if (s != null && s.length() > 0) {
      for (char ch : s.toCharArray()) {
        if (ch < '0' || ch > '9') {
          return result;
        }
      }
      try {
        result = Integer.parseInt(s);
      } catch (NumberFormatException ex) {
        result = -1;
      }
    }
    return result;
  }

  public static String getShortExpression(String text, int maxLen) {
    String result = secureString(text).trim();
    if (maxLen > 0 && result.length() > maxLen) {
      result = result.substring(0, maxLen);
      for (int p = maxLen - 1; p > (2 * maxLen / 3); p--) {
        if (Character.isSpaceChar(result.charAt(p))) {
          result = result.substring(0, p) + "...";
          break;
        }
      }
    }
    return result;
  }

  public static String limitStrLen(String text, int maxLen) {
    String result = text;

    if (result != null && result.length() > maxLen) {
      result = result.substring(0, maxLen);
    }

    return result;
  }

  public static int getIndexOf(String val, String[] ops) {
    int result = -1;
    if (val != null && ops != null) {
      for (int k = 0; k < ops.length; k++) {
        if (val.equals(ops[k])) {
          result = k;
          break;
        }
      }
    }
    return result;
  }
  
  public static String safeHtml(String s){
    return StrUtils.secureString(s).replaceAll("<", "&lt;")
            .replaceAll(">", "&gt;")
            .replaceAll("\"", "&quot;")
            .replaceAll("&", "&amp;");    
  }
  
  public static String getEnumeration(String[] array){
    StringBuilder sb = new StringBuilder();
    String tr;
    for(String s : array){
      if(s!=null && (tr=s.trim()).length()>0){
        if(sb.length()>0)
          sb.append(", ");
        sb.append(tr);
      }
    }
    return sb.toString();
  }

}