/*
  Copyright (C) 2000-2003 SKYRIX Software AG

  This file is part of OGo

  OGo 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, or (at your option) any
  later version.

  OGo 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 OGo; see the file COPYING.  If not, write to the
  Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  02111-1307, USA.
*/
// $Id$

#include "NGMimeHeaderFieldParser.h"
#include "NGMimeHeaderFields.h"
#include "NGMimeUtilities.h"
#include "common.h"

@implementation NGMimeContentTypeHeaderFieldParser

static BOOL StripLeadingSpaces = NO;
static BOOL MimeLogEnabled     = NO;

+ (int)version {
  return 2;
}
+ (void)initialize {
  StripLeadingSpaces = [self doesStripLeadingSpaces];
  MimeLogEnabled     = [self isMIMELogEnabled];
}

- (id)parseValue:(NSString *)_data ofHeaderField:(NSString *)_field {
  NSString *typeString;
  unsigned len;

  _data = [self removeCommentsFromValue:_data];
  len   = [_data length];

  if (len == 0) {
    if (MimeLogEnabled) {
      [self logWithFormat:@"WARNING(%s): empty value for header field %@ ..",
            __PRETTY_FUNCTION__, _field];
    }
    return [NGMimeType mimeType:@"text/plain"];
  }
  typeString = nil;
  if (StripLeadingSpaces) {
    unichar src[len + 1];
    int     cnt;

    cnt    = 0;
    [_data getCharacters:src];

    while (isRfc822_LWSP(src[cnt]) && (len > 0)) {
      cnt++;
      len--;
    }
    if (cnt > 0)
      typeString = [[[NSString alloc] initWithCharacters:src+cnt length:len]
                               autorelease];
  }
  if (!typeString) 
    typeString = _data;

  NSAssert(typeString, @"type string allocation failed ..");

  return [NGMimeType mimeType:typeString];
}

// description

- (NSString *)description {
  return [NSString stringWithFormat:
                     @"<MimeContentTypeHeaderFieldParser: object=0x%08X>",
                     (unsigned)self];
}

@end /* NGMimeContentTypeHeaderFieldParser */
