/** GSWForm.m - <title>GSWeb: Class GSWForm</title>

   Copyright (C) 1999-2005 Free Software Foundation, Inc.
   
   Written by:	David Wetzel <dave@turbocat.de> http://www.turbocat.de/
   Date: Jan 2006
   
   $Revision$
   $Date$

   This file is part of the GNUstep Web Library.
   
   <license>
   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library 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
   Library General Public License for more details.
   
   You should have received a copy of the GNU Library General Public
   License along with this library; if not, write to the Free
   Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
   </license>
**/

#include "config.h"

#include "GSWeb.h"

static GSWIMP_BOOL standardEvaluateConditionInContextIMP = NULL;

static Class standardClass = Nil;

//====================================================================
@implementation GSWForm

static GSWAssociation* static_defaultMethodAssociation = nil;
//--------------------------------------------------------------------
+ (void) initialize
{
  if (self == [GSWForm class])
    {
      standardClass=[GSWForm class];

      standardEvaluateConditionInContextIMP = 
        (GSWIMP_BOOL)[self instanceMethodForSelector:evaluateConditionInContextSEL];

      ASSIGN(static_defaultMethodAssociation,([GSWAssociation associationWithValue:@"post"]));
    };
};

//--------------------------------------------------------------------
-(id)initWithName:(NSString*)name
     associations:(NSDictionary*)associations
         template:(GSWElement*)template
{
  if ((self = [super initWithName:@"form"
		     associations:associations
		     template:template]))
    {
      DESTROY(_otherQueryAssociations);
      _otherQueryAssociations = RETAIN([_associations extractObjectsForKeysWithPrefix:@"?" removePrefix: YES]);

      if ([_otherQueryAssociations count] == 0)
	DESTROY(_otherQueryAssociations);

      GSWAssignAndRemoveAssociation(&_action,_associations,action__Key);
      GSWAssignAndRemoveAssociation(&_href,_associations,href__Key);
      GSWAssignAndRemoveAssociation(&_multipleSubmit,_associations,multipleSubmit__Key);
      GSWAssignAndRemoveAssociation(&_actionClass,_associations,actionClass__Key);
      GSWAssignAndRemoveAssociation(&_queryDictionary,_associations,queryDictionary__Key);
      GSWAssignAndRemoveAssociation(&_directActionName,_associations,directActionName__Key);

      if ([_associations objectForKey:method__Key] == nil
	  && [_associations objectForKey:@"Method"] == nil
	  && [_associations objectForKey:@"METHOD"] == nil)
	{
	  [_associations setObject: static_defaultMethodAssociation
			 forKey:method__Key];
	}

      if ((_action != nil && _href != nil)
	  || (_action != nil && _directActionName != nil)
	  || (_href != nil && _directActionName != nil)
	  || (_action != nil && _actionClass != nil)
	  || (_href != nil && _actionClass != nil))
	{
	  [NSException raise:NSInvalidArgumentException
		       format:@"%s: At least two of these conflicting attributes are present: 'action', 'href', 'directActionName', 'actionClass'",
		       __PRETTY_FUNCTION__];
	}
      if (_action != nil
	  && [_action isValueConstant])
	{
	  [NSException raise:NSInvalidArgumentException
		       format:@"%s: 'action' is a constant.",
		       __PRETTY_FUNCTION__];
	  
	}
    }
  return self;
}

//--------------------------------------------------------------------
-(void) dealloc
{
  DESTROY(_action);
  DESTROY(_href);
  DESTROY(_multipleSubmit);
  DESTROY(_actionClass);
  DESTROY(_queryDictionary);
  DESTROY(_otherQueryAssociations);
  DESTROY(_directActionName);

  [super dealloc];
}

//--------------------------------------------------------------------
-(id) description
{
  return [NSString stringWithFormat:@"<%s %p action: %@ actionClass: %@ directActionName: %@ href:%@ multipleSubmit: %@ queryDictionary: %@ otherQueryAssociations: %@ >",
                   object_getClassName(self),
                   (void*)self, _action, _actionClass, _directActionName, _href, _multipleSubmit,
                   _queryDictionary, _otherQueryAssociations];
};

//--------------------------------------------------------------------
- (void) _enterFormInContext:(GSWContext *) context
{
  [context setInForm:YES];
  if ([[context elementID] isEqual:[context senderID]])
    [context _setFormSubmitted:YES];
}

//--------------------------------------------------------------------
- (void) _exitFormInContext:(GSWContext *) context
{
  [context setInForm:NO];
  [context _setFormSubmitted:NO];
}

//--------------------------------------------------------------------
-(void)takeValuesFromRequest:(GSWRequest*)request
                   inContext:(GSWContext*)context
{
  [self _enterFormInContext:context];
  [super takeValuesFromRequest:request
                     inContext:context];
  [self _exitFormInContext:context];  
}

//--------------------------------------------------------------------
-(id <GSWActionResults>)invokeActionForRequest:(GSWRequest*) request
				     inContext:(GSWContext*) context

{
  id <GSWActionResults> result = nil;
  
  [self _enterFormInContext:context];
  [context _setActionInvoked:NO];
  [context _setIsMultipleSubmitForm:(_multipleSubmit == nil ? 
				     NO : [_multipleSubmit boolValueInComponent:[context component]])];
  
  result = [super invokeActionForRequest:request
		  inContext:context];
  if (![context _wasActionInvoked]
      && [context _wasFormSubmitted])
    {
      if (_action != nil)
	result = [_action valueInComponent:[context component]];
      if (result == nil)
	result = [context page];
    }
  [context _setIsMultipleSubmitForm:NO];
  [self _exitFormInContext:context];
  
  return result;
}

//--------------------------------------------------------------------
-(void) _appendHiddenFieldsToResponse:(GSWResponse*) response
			    inContext:(GSWContext*) context
{
  NSDictionary * queryDict = [self computeQueryDictionaryWithActionClassAssociation: _actionClass
                                                        directActionNameAssociation: _directActionName
                                                         queryDictionaryAssociation: _queryDictionary
                                                             otherQueryAssociations: _otherQueryAssociations 
                                                                          inContext: context];
  if ([queryDict count] > 0)
    {
      NSEnumerator* myEnumer = [queryDict keyEnumerator];
      NSString* key=nil;

      while ((key = [myEnumer nextObject]))
	{
	  NSString* value = NSStringWithObject([queryDict objectForKey:key]);
	  GSWResponse_appendContentAsciiString(response,@"<input type=hidden");
	  GSWResponse_appendTagAttributeValueEscapingHTMLAttributeValue(response, name__Key, key, NO);  
	  GSWResponse_appendTagAttributeValueEscapingHTMLAttributeValue(response, value__Key, value, NO);
	  GSWResponse_appendContentAsciiString(response,@">\n");
	}
    }
}

//--------------------------------------------------------------------
-(void) appendToResponse:(GSWResponse *) response
               inContext:(GSWContext*) context
{
  [context setInForm:YES];
  [super appendToResponse: response
	 inContext: context];
  [context setInForm:NO];
}

//--------------------------------------------------------------------
-(void) appendChildrenToResponse:(GSWResponse *) response
                       inContext:(GSWContext*) context
{
  [super appendChildrenToResponse:response
                        inContext:context];

  [self _appendHiddenFieldsToResponse:response
                            inContext:context];
}

//--------------------------------------------------------------------
-(void) _appendCGIActionToResponse:(GSWResponse *) response
                         inContext:(GSWContext*) context
{
  NSString *str = [self computeActionStringWithActionClassAssociation: _actionClass
                                          directActionNameAssociation: _directActionName
                                                            inContext: context];

  NSString * myActionURL = [context directActionURLForActionNamed: str
                                                  queryDictionary: nil];
                                                       
  
  GSWResponse_appendTagAttributeValueEscapingHTMLAttributeValue(response, action__Key, myActionURL, NO);
}

//--------------------------------------------------------------------
-(void) appendAttributesToResponse:(GSWResponse *) response 
                         inContext:(GSWContext*) aContext
{
  GSWComponent * component = GSWContext_component(aContext);

  [super appendAttributesToResponse:response
	 inContext:aContext];
  

  if (_directActionName != nil
      || _actionClass != nil)
    {
      [self _appendCGIActionToResponse:response
	    inContext: aContext];
    }
  else
    {
      NSString* href=[_href valueInComponent:component];
      if (href != nil)
	{
	  GSWResponse_appendTagAttributeValueEscapingHTMLAttributeValue(response, 
									action__Key, 
									NSStringWithObject(href),
									NO);
	}
      else if (_href == nil)
	{
	  BOOL secure = (_secure != nil ? [_secure boolValueInComponent:component] : NO);
	  GSWResponse_appendTagAttributeValueEscapingHTMLAttributeValue(response,
									action__Key, 
									[aContext _componentActionURLIsSecure:secure],
									NO);
	}
      else
	{
	  NSLog(@"%s: action attribute evaluates to null. %@", __PRETTY_FUNCTION__, self);
	}
    }
}

//--------------------------------------------------------------------
+(BOOL)hasGSWebObjectsAssociations
{
  return NO;
};

@end