/***************************************************************************
                                krdirwatch.cpp
                             -------------------
    copyright            : (C) 2000 by Shie Erlich & Rafi Yanai
    e-mail               : krusader@users.sourceforge.net
    web site             : http://krusader.sourceforge.net
 ---------------------------------------------------------------------------
  Description
 ***************************************************************************

  A

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                                                     S o u rc e    F i l e

 ***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/
#include "krdirwatch.h"
#include <unistd.h>
#include <sys/types.h>
#include <kdebug.h>
#include "krpermhandler.h"
#include "tqstringlist.h"
#include <tqdir.h>

KRdirWatch::KRdirWatch(int msec,bool dirOnly):
  delay(msec),t(this), changed(false) {
  if(dirOnly) dir.setFilter( TQDir::Dirs | TQDir::Hidden | TQDir::NoSymLinks );
  watched.setAutoDelete(true);
  connect(&t,TQ_SIGNAL(timeout()),this, TQ_SLOT(checkDirs()));
  startScan();
}

KRdirWatch::~KRdirWatch(){
  clearList();
  stopScan();
}

void KRdirWatch::removeDir(TQString path){
  t.stop();
  for ( it = watched.first(); it != 0;  )
    if (it->path == path) watched.remove();
    else it = watched.next();
  if (!stopped) startScan();
}

void KRdirWatch::addDir(TQString path, bool checkPermissions){
  t.stop();

  krDirEntry* temp = new krDirEntry;
  if (!dir.cd(path)){ // if it's not a dir or don't exist - don't add it
    //kdDebug() << "KRDirWatch: can't watch " + path +", (don't exist)" << endl;
    return;
  }
  if( checkPermissions ) {
    // if we can't read it - don't bother
    if (getgid() != 0 && !KRpermHandler::fileReadable(path) ){
      //kdDebug() << "KRDirWatch: can't watch " + path +", (not readable)" << endl;
      return;
    }
    if (!KRpermHandler::fileWriteable(path) ){ // read-only directorys can't be changed
      //kdDebug() << "KRDirWatch: not watching " + path +", (read-only directory)" << endl;
      return;
    }
  }
  qfi.setFile(path);

  temp->path = dir.path();
  temp->count = dir.entryList(TQDir::All | TQDir::AccessMask).count();
  temp->lastModified = qfi.lastModified();

  watched.append(temp);
  if (!stopped) startScan();
}

// here we do the actual checking
void KRdirWatch::checkDirs(){
  t.stop();

  TQString path;
  unsigned long count;
  TQDateTime dt;

  for ( it = watched.first(); it != 0; it = watched.next() ){
    path = it->path;
    qfi.setFile(path);
    if (!dir.cd(path)){
      clearList();
      emit dirty();
      return;
    }
    dt = qfi.lastModified();
    count = dir.entryList(TQDir::All | TQDir::AccessMask).count();
    // check for changes
    if(it->lastModified!=dt || it->count!=count){
      changed = true;
      it->lastModified=dt;
      it->count=count;
      startScan();
      return;
    }
    if(changed){
      changed = false;
      clearList();
      emit dirty();
      return;
    }
  }
  if (!stopped) startScan();
}

#include "krdirwatch.moc"