/*
* Copyright (C) 2010-2011 Mamadou Diop.
*
* Contact: Mamadou Diop <diopmamadou(at)doubango[dot]org>
*	
* This file is part of Open Source Doubango Framework.
*
* DOUBANGO is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*	
* DOUBANGO 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 General Public License for more details.
*	
* You should have received a copy of the GNU General Public License
* along with DOUBANGO.
*
*/

/**@file thttp_header.c
 * @brief Defines a HTTP header (field-name: field-value).
 *
 * @author Mamadou Diop <diopmamadou(at)doubango[dot]org>
 *

 */
#include "tinyhttp/headers/thttp_header.h"

#include "tinyhttp/headers/thttp_header_Dummy.h"

/**@defgroup thttp_header_group HTTP Headers
*/

const char *thttp_header_get_name(thttp_header_type_t type)
{
	switch(type)
	{
		case thttp_htype_Authorization: return "Authorization";
		case thttp_htype_Content_Length: return "Content-Length";
		case thttp_htype_Content_Type: return "Content-Type";
		case thttp_htype_ETag: return "ETag";
		case thttp_htype_Proxy_Authenticate: return "Proxy-Authenticate";
		case thttp_htype_Proxy_Authorization: return "Proxy-Authorization";
		case thttp_htype_Transfer_Encoding: return "Transfer-Encoding";
		case thttp_htype_WWW_Authenticate: return "WWW-Authenticate";
		case thttp_htype_Sec_WebSocket_Accept: return "Sec-WebSocket-Accept";
		case thttp_htype_Sec_WebSocket_Protocol: return "Sec-WebSocket-Protocol";
		case thttp_htype_Sec_WebSocket_Key: return "Sec-WebSocket-Key";
		case thttp_htype_Sec_WebSocket_Version: return "Sec-WebSocket-Version";

		default: return "unknown-header";
	}
}

const char *thttp_header_get_nameex(const thttp_header_t *self)
{
	if(self){
		if(self->type == thttp_htype_Dummy){
			return ((thttp_header_Dummy_t*)self)->name;
		}
		else{
			return thttp_header_get_name(self->type);
		}
	}
	return "unknown-header";
}

char thttp_header_get_param_separator(const thttp_header_t *self)
{
	if(self)
	{
		switch(self->type)
		{
		case thttp_htype_Authorization:
		case thttp_htype_Proxy_Authorization:
		case thttp_htype_Proxy_Authenticate:
		case thttp_htype_WWW_Authenticate:
			return ',';
		default:
			return ';';
		}
	}
	return 0;
}

/**@ingroup thttp_header_group
*/
int thttp_header_serialize(const thttp_header_t *self, tsk_buffer_t *output)
{
	int ret = -1;
	static const char* hname;
	static char separator;

	if(self && THTTP_HEADER(self)->tostring)
	{
		tsk_list_item_t *item;
		
		hname = thttp_header_get_nameex(self);
		ret = 0; // for empty lists

		/* Header name */
		tsk_buffer_append_2(output, "%s: ", hname);

		/*  Header value.*/
		if((ret = THTTP_HEADER(self)->tostring(self, output))){
			// CHECK all headers return value!
			//return ret;
		}

		/* Parameters */
		tsk_list_foreach(item, self->params){
			tsk_param_t* param = item->data;
			separator = thttp_header_get_param_separator(self);
			if((ret = tsk_buffer_append_2(output, param->value?"%c%s=%s":"%c%s", separator, param->name, param->value))){
				return ret;
			}
		}

		/* CRLF */
		tsk_buffer_append(output, "\r\n", 2);
	}
	return ret;
}

/**@ingroup thttp_header_group
*/
char* thttp_header_tostring(const thttp_header_t *self)
{
	tsk_buffer_t *output = tsk_buffer_create_null();
	char* ret = tsk_null;

	if(!thttp_header_serialize(self, output)){
		ret = tsk_strndup(output->data, output->size);
	}

	TSK_OBJECT_SAFE_FREE(output);
	return ret;
}

/**@ingroup thttp_header_group
*/
char* thttp_header_value_tostring(const thttp_header_t *self)
{
	tsk_buffer_t *output = tsk_buffer_create_null();
	char* ret = tsk_null;

	if(!self->tostring(self, output)){
		ret = tsk_strndup(output->data, output->size);
	}

	TSK_OBJECT_SAFE_FREE(output);
	return ret;
}
