/*
  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.
*/
// $Id$

#import "common.h"
#import "LSNewInvoiceArticleCommand.h"

@interface LSNewInvoiceArticleCommand(privatemethods)
- (void)_checkArticleNrInContext:(id)_context;
@end

@implementation LSNewInvoiceArticleCommand

- (void)_computeArticleNrInContext:(id)_context {
  int              maxArtNumber = 1;
  NSString         *expr        = nil;
  EOAdaptorChannel *adChannel   = nil;

  adChannel  = [[_context valueForKey:LSDatabaseChannelKey] adaptorChannel];

  expr = @"SELECT MAX(article_nr) FROM article";
  
  if ([adChannel evaluateExpression:expr]) {
    NSDictionary *result;
    id v;

    result = [adChannel fetchAttributes:
                        [adChannel describeResults] withZone:nil];
    [adChannel cancelFetch];

    v = [[result keyEnumerator] nextObject];
    if (v) v = [result objectForKey:v];

    maxArtNumber = [v intValue] + 1;
  }
  [self takeValue:[[NSNumber numberWithInt:maxArtNumber] stringValue]
        forKey:@"articleNr"];
}

- (void)_prepareForExecutionInContext:(id)_context {
  NSNumber     *price;
  id           account;
  id           team;
  NSEnumerator *teamEnum;
  BOOL         access = NO;

  price    = [self valueForKey:@"price"];
  account  = [_context valueForKey:LSAccountKey];
  teamEnum =
    [LSRunCommandV(_context, @"account", @"teams",
                  @"account", account,
                  @"returnType", intObj(LSDBReturnType_ManyObjects),
                  nil) objectEnumerator];

  while ((team = [teamEnum nextObject])) {
    if ([[team valueForKey:@"login"] isEqualToString:@"invoices"]) {
      access = YES;
      break;
    }
  }

  [self assert:access reason:@"You have no permission for doing that!"];

  [self _computeArticleNrInContext:_context];

  [self assert:((price != nil) && ([price isNotNull]))
        reason:@"No Price set!"];

  [super _prepareForExecutionInContext:_context];
}

- (NSString*)entityName {
  return @"Article";
}

@end