/*
 * Created on 09.08.2003
 *
 */
package net.sourceforge.phpdt.internal.ui.util;

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

import net.sourceforge.phpeclipse.PHPeclipsePlugin;

import org.eclipse.core.resources.IFile;
import org.eclipse.jface.preference.IPreferenceStore;

/**
 * @author khartlage
 *  
 */
public class PHPFileUtil {
  private static String[] PHP_EXTENSIONS = null;

  //  {
  //      "php",
  //      "php3",
  //      "php4",
  //      "php5",
  //      "phtml",
  //      "module", // drupal
  //      "inc",
  //      "class"
  //  };
  //  public final static String[] HTML_EXTENSIONS = {
  //      "html",
  //      "htm",
  //      "xhtml"
  //  };
  public final static String[] SMARTY_EXTENSIONS = { "tpl" };

  public static boolean isPHPFile(IFile file) {
    String extension = file.getFileExtension();
    return isPHPFileName(file.getLocation().toString());
  }

  public final static String getFileExtension(String name) {
    int index = name.lastIndexOf('.');
    if (index == -1)
      return null;
    if (index == (name.length() - 1))
      return null; //$NON-NLS-1$
    return name.substring(index + 1);
  }

  /**
   * Returns true iff str.toLowerCase().endsWith(".php") implementation is not creating extra strings.
   */
  public final static boolean isPHPFileName(String name) {
    String extension = getFileExtension(name);
    if (extension == null) {
      return false;
    }
    extension = extension.toLowerCase();
    PHP_EXTENSIONS = getExtensions();
    if (PHP_EXTENSIONS == null) {
      return false;
    }
    for (int i = 0; i < PHP_EXTENSIONS.length; i++) {
      if (extension.equals(PHP_EXTENSIONS[i])) {
        return true;
      }
    }
    return false;
  }

  /**
   * Returns true iff str.toLowerCase().endsWith(".html") implementation is not creating extra strings.
   */
  //  public final static boolean isHTML_FileName(String name) {
  //    String extension = getFileExtension(name);
  //    if (extension==null) {
  //      return false;
  //    }
  //  extension = extension.toLowerCase();
  //    for (int i=0;i<HTML_EXTENSIONS.length;i++) {
  //      if (extension.equals(HTML_EXTENSIONS[i])) {
  //        return true;
  //      }
  //    }
  //    return false;
  //  }
  /**
   * Returns true iff str.toLowerCase().endsWith(".tpl") implementation is not creating extra strings.
   */
  //  public final static boolean isTPL_FileName(String name) {
  //    String extension = getFileExtension(name);
  //    if (extension==null) {
  //      return false;
  //    }
  //  extension = extension.toLowerCase();
  //    for (int i=0;i<SMARTY_EXTENSIONS.length;i++) {
  //      if (extension.equals(SMARTY_EXTENSIONS[i])) {
  //        return true;
  //      }
  //    }
  //    return false;
  //  }
  /**
   * Returns true iff the file extension is a valid PHP Unit name implementation is not creating extra strings.
   */
  public final static boolean isValidPHPUnitName(String filename) {
    return PHPFileUtil.isPHPFileName(filename);
    //		||
    //		       PHPFileUtil.isHTML_FileName(filename) ||
    //			   PHPFileUtil.isTPL_FileName(filename);
  }

  /**
   * @return Returns the PHP extensions.
   */
  public static String[] getExtensions() {
    if (PHP_EXTENSIONS == null) {
      ArrayList list = new ArrayList();
      final IPreferenceStore store = PHPeclipsePlugin.getDefault().getPreferenceStore();
      String extensions = store.getString(PHPeclipsePlugin.PHP_EXTENSION_PREFS);
      extensions = extensions.trim();
      if (extensions.length() != 0) {
        StringTokenizer tokenizer = new StringTokenizer(extensions, " ,;:/-|");
        String token;
        while (tokenizer.hasMoreTokens()) {
          token = tokenizer.nextToken();
          if (token != null && token.length() >= 1) {
            list.add(token);
          }
        }
        if (list.size() != 0) {
          PHP_EXTENSIONS = new String[list.size()];
          for (int i = 0; i < list.size(); i++) {
            PHP_EXTENSIONS[i] = (String) list.get(i);
          }
        }
      }
    }
    return PHP_EXTENSIONS;
  }

  /**
   * @param php_extensions
   *          The PHP extensions to set.
   */
  public static void setExtensins(String[] php_extensions) {
    PHP_EXTENSIONS = php_extensions;
  }
}