#include "zipios-config.h"

#include "meta-iostreams.h"

#include "collcoll.h"
#include "zipios_common.h"

namespace zipios {

using std::ifstream ;

CollectionCollection *CollectionCollection::_inst = 0 ;


CollectionCollection::CollectionCollection() {
  _valid = true ; // we're valid even though we are empty!
}


bool CollectionCollection::addCollection( const FileCollection &collection ) {
  if ( ! _valid )
    throw InvalidStateException( "Attempt to add a FileCollection to an invalid CollectionCollection" ) ;
  if ( this == &collection || ! collection.isValid()  )
    return false ;
  _collections.push_back( collection.clone() ) ;
  return true ;
  
}

bool CollectionCollection::addCollection( FileCollection *collection ) {
  if ( ! _valid )
    throw InvalidStateException( "Attempt to add a FileCollection to an invalid CollectionCollection" ) ;
  if ( collection == 0 || this == collection || ! collection->isValid() )
    return false ;
  _collections.push_back( collection ) ;
  return true ;
}


void CollectionCollection::close() {
  _valid = false ;
}


ConstEntries CollectionCollection::entries() const {
  if ( ! _valid )
    throw InvalidStateException( "Attempt to get entries from an invalid CollectionCollection" ) ;

  ConstEntries all_entries ;
  std::vector< FileCollection * >::const_iterator it ;
  for ( it = _collections.begin() ; it != _collections.end() ; it++ )
    all_entries += (*it)->entries() ;
  return all_entries ;
}


ConstEntryPointer CollectionCollection::getEntry( const string &name, 
						  MatchPath matchpath ) const {
  if ( ! _valid )
    throw InvalidStateException( "Attempt to get an entry from an invalid CollectionCollection" ) ;
  // Returns the first matching entry.
  std::vector< FileCollection * >::const_iterator it ;
  ConstEntryPointer cep ;

  getEntry( name, cep, it, matchpath ) ; 

  return cep ;
}


istream *CollectionCollection::getInputStream( const ConstEntryPointer &entry ) {
  if ( ! _valid )
    throw InvalidStateException( "Attempt to get an input stream from an invalid CollectionCollection" ) ;

  return getInputStream( entry->getName() ) ;
}


istream *CollectionCollection::getInputStream( const string &entry_name, 
					       MatchPath matchpath ) {
  if ( ! _valid )
    throw InvalidStateException( "Attempt to get an input stream from an invalid CollectionCollection" ) ;

  std::vector< FileCollection * >::const_iterator it ;
  ConstEntryPointer cep ;

  getEntry( entry_name, cep, it, matchpath ) ; 
  
  if ( cep == 0 )
    return 0 ;
  else
    return (*it)->getInputStream( entry_name ) ;
  
}


int CollectionCollection::size() const {
  if ( ! _valid )
    throw InvalidStateException( "Attempt to get the size of an invalid CollectionCollection" ) ;
  int sz = 0 ;
  std::vector< FileCollection * >::const_iterator it ;
  for ( it = _collections.begin() ; it != _collections.end() ; it++ )
    sz += (*it)->size() ;
  return sz ;
}

FileCollection *CollectionCollection::clone() const {
  return new CollectionCollection( *this ) ;
}

CollectionCollection::~CollectionCollection() {
  std::vector< FileCollection * >::iterator it ;
  for ( it = _collections.begin() ; it != _collections.end() ; ++it )
    delete *it ;
}


//
// Protected member functions
//

void CollectionCollection::getEntry( const string &name,
				     ConstEntryPointer &cep, 
				     std::vector< FileCollection * >::const_iterator &it, 
				     MatchPath matchpath ) const {
  
  // Returns the first matching entry.
  cep = 0 ;
  for ( it = _collections.begin() ; it != _collections.end() ; it++ ) {
    cep = (*it)->getEntry( name, matchpath ) ;
    if ( cep )
      break ;
  }
}



} // namespace

/** \file
    Implementation of CollectionCollection.
*/

/*
  Zipios++ - a small C++ library that provides easy access to .zip files.
  Copyright (C) 2000  Thomas Søndergaard
  
  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2 of the License, or (at your option) any later version.
  
  This library 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
  Lesser General Public License for more details.
  
  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
*/