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

   Copyright (C) 1999-2004 Free Software Foundation, Inc.
   
   Written by:	Manuel Guesdon <mguesdon@orange-concept.com>
   Date: 	Jan 1999
   
   $Revision$
   $Date$

   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"

RCS_ID("$Id$")

#include "GSWeb.h"

static GSWIMP_BOOL standardEvaluateConditionInContextIMP = NULL;

static Class standardClass = Nil;

//====================================================================
@implementation GSWGenericElement

//--------------------------------------------------------------------
+ (void) initialize
{
  if (self == [GSWGenericElement class])
    {
      standardClass=[GSWGenericElement class];

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

//-----------------------------------------------------------------------------------
-(id)initWithName:(NSString*)name
     associations:(NSDictionary*)associations
         template:(GSWElement*)templateElement
{

  if ((self=[super initWithName: name
		   associations: associations
		   template: templateElement]))
    {
      NSMutableDictionary *dict=nil;

      ASSIGN(_elementName, [associations objectForKey: elementName__Key]);
      ASSIGN(_name, [associations objectForKey: name__Key]);
      ASSIGN(_omitTags, [associations objectForKey: omitTags__Key]);
      ASSIGN(_formValue, [associations objectForKey: formValue__Key]);
      ASSIGN(_formValues, [associations objectForKey: formValues__Key]);
      ASSIGN(_invokeAction, [associations objectForKey: invokeAction__Key]);
      ASSIGN(_elementID, [associations objectForKey: elementID__Key]);
      ASSIGN(_otherTagString, [associations objectForKey: otherTagString__Key]);

      if(_formValue || _formValues)
	{
	  _hasFormValues = YES;
	  if (name == nil)
	    {
	      [NSException raise: NSInvalidArgumentException
			   format: @"%@(%@):Attribute 'name' is manditory "
			           @"when formValue(s) are supplied. (%@)",
			   [self description],
			   NSStringFromSelector(_cmd), 
			   associations];
	    }
	}

      dict = AUTORELEASE([associations mutableCopy]);

      [dict removeObjectForKey: elementName__Key];
      [dict removeObjectForKey: name__Key];
      [dict removeObjectForKey: omitTags__Key];
      [dict removeObjectForKey: formValue__Key];
      [dict removeObjectForKey: formValues__Key];
      [dict removeObjectForKey: invokeAction__Key];
      [dict removeObjectForKey: elementID__Key];
      [dict removeObjectForKey: otherTagString__Key];

      ASSIGNCOPY(_otherAssociations, dict);
    }


  return self;
};

//--------------------------------------------------------------------
-(void)dealloc
{
  RELEASE (_name);
  RELEASE (_omitTags);
  RELEASE (_formValue);
  RELEASE (_formValues);
  RELEASE (_invokeAction);
  RELEASE (_elementID);
  RELEASE (_otherTagString);
  RELEASE (_otherAssociations);
  [super dealloc];
};

//--------------------------------------------------------------------
-(NSString*)description
{
  return [NSString stringWithFormat:@"%@(%p)\n(%@)", 
		   NSStringFromClass([self class]), self, _otherAssociations];
};

//--------------------------------------------------------------------
-(void)appendToResponse:(GSWResponse*)response
              inContext:(GSWContext*)context
{

  [self _elementNameAppendToResponse: response 
        inContext: context];

};

//--------------------------------------------------------------------
-(GSWElement*)invokeActionForRequest:(GSWRequest*)request
                           inContext:(GSWContext*)aContext
{
  GSWElement *element = nil;
  GSWComponent *component = nil;


  component = GSWContext_component(aContext);

  if (_invokeAction != nil
      && [_invokeAction isImplementedForComponent:component])
    {
      NSString *elementID = GSWContext_elementID(aContext);
      NSString *senderID = GSWContext_senderID(aContext);

      NSDebugMLog(@"elementID=%@ senderID=%@",
                  elementID,senderID);

      if ([elementID isEqualToString: senderID])
	{
          if (_elementID != nil)
              [_elementID setValue: elementID
                          inComponent: component];

          element = [_invokeAction valueInComponent:component];
          if (!element)
            element = [aContext page];
        }
      else if (_name)
        {
          id nameValue = [_name valueInComponent:component];
          id formValue = [request stringFormValueForKey:nameValue];

          if (formValue)
            {
              if(_elementID)
                [_elementID setValue: elementID
                            inComponent:component];

              element = [_invokeAction valueInComponent: component];
              if (!element)
                element = [aContext page];
            };
        };
    }


  return element;
};

//--------------------------------------------------------------------
-(void)takeValuesFromRequest:(GSWRequest*)request
                   inContext:(GSWContext*)aContext
{

  if (_hasFormValues)
    {
      GSWComponent *component = GSWContext_component(aContext);
      NSString *elementID = GSWContext_elementID(aContext);
      id nameValue = [_name valueInComponent: component];

      if (_elementID != nil)
	{
	  [_elementID setValue: elementID
		      inComponent: component];
	}
      if (_formValue != nil)
	{ 
	  [_formValue setValue: [request stringFormValueForKey: nameValue]
		      inComponent: component];
	}
      if (_formValues != nil)
	{
	  [_formValue setValue: [request formValuesForKey: nameValue]
		      inComponent: component];
	}
    }

};

//-------------------------------------------------------------------- 
-(id)_elementNameAppendToResponse:(GSWResponse*)response
			inContext:(GSWContext*)aContext
{
  NSString *elementName = nil;


  if (_elementID != nil)
    {
      [_elementID setValue: GSWContext_elementID(aContext)
		  inComponent: GSWContext_component(aContext)];
    }

  elementName = [self _elementNameInContext: aContext];
  NSDebugMLog(@"elementName=%@",elementName);

  if (elementName != nil)
    {
      [self _appendTagWithName: elementName 
	    toResponse: response 
	    inContext: aContext];
    }


  return elementName;
};

//--------------------------------------------------------------------
-(void)_appendTagWithName:(NSString*)name
               toResponse:(GSWResponse*)aResponse
                inContext:(GSWContext*)aContext
{
  GSWComponent *comp = nil;


  comp = GSWContext_component(aContext);
  GSWResponse_appendContentCharacter(aResponse,'<');
  GSWResponse_appendContentString(aResponse, name);
  if (_name != nil)
    {
      NSString *compName = [_name valueInComponent: comp];
      GSWResponse_appendContentAsciiString(aResponse, @" name=\"");
      GSWResponse_appendContentString(aResponse, compName);
      GSWResponse_appendContentCharacter(aResponse, '"');
    }
  if (_otherAssociations != nil)
    {
      [self _appendOtherAttributesToResponse: aResponse 
	    inContext: aContext];
    }
  if (_otherTagString != nil)
    {
      NSString *oTagComp = [_otherTagString valueInComponent: comp];
      if (oTagComp != nil && [oTagComp length])
	{
	  GSWResponse_appendContentCharacter(aResponse, ' ');
	  GSWResponse_appendContentString(aResponse, oTagComp);
	}
    }
  GSWResponse_appendContentCharacter(aResponse, '>');

};

//--------------------------------------------------------------------
-(void)_appendOtherAttributesToResponse:(GSWResponse*)aResponse
                              inContext:(GSWContext*)aContext
{
  GSWComponent *comp = nil;
  NSEnumerator *keyEnum = nil;
  NSString *key = nil;


  comp = GSWContext_component(aContext);
  keyEnum = [_otherAssociations keyEnumerator];

  while ((key = [keyEnum nextObject]))
    {
      GSWAssociation *assoc;
      id val;
      NSString *desc;

      assoc = [_otherAssociations objectForKey: key];
      val = [assoc valueInComponent: comp];
      if (val != nil)
	{
	  desc = [val description];
          GSWResponse_appendTagAttributeValueEscapingHTMLAttributeValue(aResponse,
                                                                        key,
                                                                        desc,
                                                                        NO);
	}
    }
  
};

//--------------------------------------------------------------------
-(NSString*)_elementNameInContext:(GSWContext*)aContext
{
  NSString* elementName = nil;


  NSDebugMLog(@"_elementName=%@",_elementName);

   if (_elementName)
    {
      BOOL omit = NO;

      if (_omitTags)
	{
	  omit = GSWDynamicElement_evaluateValueInContext(self,standardClass,
                                                          standardEvaluateConditionInContextIMP,
                                                          _omitTags,aContext);
	}

      if (omit == NO)
	{
	  elementName=[_elementName valueInComponent:GSWContext_component(aContext)];
	}
    }

  NSDebugMLog(@"elementName=%@",elementName);


  return elementName;
};

@end