/*
* Copyright (C) 2009 Mamadou Diop.
*
* Contact: Mamadou Diop <diopmamadou(at)doubango.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 tsdp_header_T.c
 * @brief SDP "t=" header (Timing).
 *
 * @author Mamadou Diop <diopmamadou(at)doubango.org>
 *
 * @date Created: Uat Nov 8 16:54:58 2009 mdiop
 */
#include "tinysdp/headers/tsdp_header_T.h"

#include "tsk_debug.h"
#include "tsk_memory.h"
#include "tsk_string.h"

#include <string.h>

/***********************************
*	Ragel state machine.
*/
%%{
	machine tsdp_machine_parser_header_T;

	# Includes
	include tsdp_machine_utils "./ragel/tsdp_machine_utils.rl";
	
	action tag{
		tag_start = p;
	}

	action parse_value{
		TSK_PARSER_SET_STRING(hdr_T->value);
	}

	action parse_start_time{
		TSK_PARSER_SET_INTEGER_EX(hdr_T->start, uint64_t, atoi64);
	}

	action parse_stop_time{
		TSK_PARSER_SET_INTEGER_EX(hdr_T->stop, uint64_t, atoi64);
	}

	action parse_repeat_fields{
		tsdp_header_R_t* header_R;
		if((header_R = tsdp_header_R_parse(tag_start, (p - tag_start)))){
			if(!hdr_T->repeat_fields){
				hdr_T->repeat_fields = tsk_list_create();
			}
			tsk_list_push_back_data(hdr_T->repeat_fields, (void**)&header_R);
		}
	}
	
	start_time = DIGIT+ >tag %parse_start_time;
	stop_time = DIGIT+ >tag %parse_stop_time;
	repeat_fields = any+ >tag %parse_repeat_fields;

	T = 't' SP* "=" SP*<: start_time :>SP stop_time (CRLF <:repeat_fields)?;
	
	# Entry point
	main := T :>CRLF?;

}%%


tsdp_header_T_t* tsdp_header_T_create(uint64_t start, uint64_t stop)
{
	return tsk_object_new(TSDP_HEADER_T_VA_ARGS(start, stop));
}

tsdp_header_T_t* tsdp_header_T_create_null()
{
	return tsdp_header_T_create(0, 0);
}

int tsdp_header_T_tostring(const tsdp_header_t* header, tsk_buffer_t* output)
{
	if(header)
	{
		const tsdp_header_T_t *T = (const tsdp_header_T_t *)header;
		const tsk_list_item_t *item;
		
		//"t=3034423619 3042462419\r\n"
		//"r=7d 1h 0 25h\r\n"
		// IMPORTANT: Do not append the last CRLF (because we only print the header value).
		tsk_buffer_append_2(output, "%llu %llu", 
			T->start,
			T->stop
			);

		tsk_list_foreach(item, T->repeat_fields)
		{
			if(TSK_LIST_IS_FIRST(T->repeat_fields, item)){
				tsk_buffer_append(output, "\r\n", 2);
			}
			tsk_buffer_append_2(output, "%c=", tsdp_header_get_nameex(TSDP_HEADER(item->data)));
			TSDP_HEADER(item->data)->tostring(TSDP_HEADER(item->data), output);
			//tsdp_header_tostring(TSDP_HEADER(item->data), output);

			if(!TSK_LIST_IS_LAST(T->repeat_fields, item)){
				tsk_buffer_append(output, "\r\n", 2);
			}
		}

		return 0;
	}

	return -1;
}

tsdp_header_t* tsdp_header_T_clone(const tsdp_header_t* header)
{
	if(header){
		const tsdp_header_T_t *T = (const tsdp_header_T_t *)header;
		tsdp_header_T_t* clone;
		const tsk_list_item_t *item;

		if((clone = tsdp_header_T_create(T->start, T->stop))){

			if(T->repeat_fields){
				clone->repeat_fields = tsk_list_create();
			}

			tsk_list_foreach(item, T->repeat_fields){
				const tsdp_header_t* curr = item->data;
				tsdp_header_t* hdr_clone = curr->clone(curr);
				tsk_list_push_back_data(clone->repeat_fields, (void**)&hdr_clone);
			}
		}
		return TSDP_HEADER(clone);
	}
	return tsk_null;
}

tsdp_header_T_t *tsdp_header_T_parse(const char *data, tsk_size_t size)
{
	int cs = 0;
	const char *p = data;
	const char *pe = p + size;
	const char *eof = pe;
	tsdp_header_T_t *hdr_T = tsdp_header_T_create_null();
	
	const char *tag_start;

	%%write data;
	%%write init;
	%%write exec;
	
	if( cs < %%{ write first_final; }%% ){
		TSK_DEBUG_ERROR("Failed to parse \"t=\" header.");
		TSK_OBJECT_SAFE_FREE(hdr_T);
	}
	
	return hdr_T;
}







//========================================================
//	T header object definition
//

static tsk_object_t* tsdp_header_T_ctor(tsk_object_t *self, va_list * app)
{
	tsdp_header_T_t *T = self;
	if(T){
		TSDP_HEADER(T)->type = tsdp_htype_T;
		TSDP_HEADER(T)->tostring = tsdp_header_T_tostring;
		TSDP_HEADER(T)->clone = tsdp_header_T_clone;
		TSDP_HEADER(T)->rank = TSDP_HTYPE_T_RANK;
	}
	else{
		TSK_DEBUG_ERROR("Failed to create new U header.");
	}
	return self;
}

static tsk_object_t* tsdp_header_T_dtor(tsk_object_t *self)
{
	tsdp_header_T_t *T = self;
	if(T){
		TSK_OBJECT_SAFE_FREE(T->repeat_fields);
	}
	else{
		TSK_DEBUG_ERROR("Null U header.");
	}

	return self;
}
static int tsdp_header_T_cmp(const tsk_object_t *obj1, const tsk_object_t *obj2)
{
	if(obj1 && obj2){
		return tsdp_header_rank_cmp(obj1, obj2);
	}
	else{
		return -1;
	}
}

static const tsk_object_def_t tsdp_header_T_def_s = 
{
	sizeof(tsdp_header_T_t),
	tsdp_header_T_ctor,
	tsdp_header_T_dtor,
	tsdp_header_T_cmp
};

const tsk_object_def_t *tsdp_header_T_def_t = &tsdp_header_T_def_s;
