/*
 * 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 tsip_header_From.c
  * @brief SIP From/f header as per RFC 3261 subclause 20.20.
  *
  * @author Mamadou Diop <diopmamadou(at)doubango[dot]org>
  *
 
  */
 #include "tinysip/headers/tsip_header_From.h"
 
 #include "tinysip/parsers/tsip_parser_uri.h"
 
 #include "tsk_debug.h"
 #include "tsk_memory.h"
 
 
 
 /***********************************
 *	Ragel state machine.
 */
 %%{
 	machine tsip_machine_parser_header_From;
 
 	# Includes
 	include tsip_machine_utils "./ragel/tsip_machine_utils.rl";
 	
 	action tag{
 		tag_start = p;
 	}
 	
 	action parse_uri{
 		int len = (int)(p  - tag_start);
 		if(hdr_from && !hdr_from->uri){
 			if((hdr_from->uri = tsip_uri_parse(tag_start, (tsk_size_t)len)) && hdr_from->display_name){
 				hdr_from->uri->display_name = tsk_strdup(hdr_from->display_name);
 			}
 		}
 	}
 
 	action parse_display_name{
 		TSK_PARSER_SET_STRING(hdr_from->display_name);
 		tsk_strunquote(&hdr_from->display_name);
 	}
 
 	action parse_tag{
 		TSK_PARSER_SET_STRING(hdr_from->tag);
 	}
 
 	action parse_param{
 		TSK_PARSER_ADD_PARAM(TSIP_HEADER_PARAMS(hdr_from));
 	}
 
 	action eob{
 	}
 
 	URI = (scheme HCOLON any+)>tag %parse_uri;
 	display_name = (( token LWS )+ | quoted_string)>tag %parse_display_name;
 	my_name_addr = display_name? :>LAQUOT<: URI :>RAQUOT;
 	my_tag_param = "tag"i EQUAL token>tag %parse_tag;
 	from_param = (my_tag_param)@1 | (generic_param)@0 >tag %parse_param;
 	from_spec = ( my_name_addr | URI ) :> ( SEMI from_param )*;
 	
 	From = ( "From"i | "f"i ) HCOLON from_spec;
 	
 	# Entry point
 	main := From :>CRLF @eob;
 
 }%%
 
 
 tsip_header_From_t* tsip_header_From_create(const char* display_name, const tsip_uri_t* uri, const char* tag)
 {
 	return tsk_object_new(TSIP_HEADER_FROM_VA_ARGS(display_name, uri, tag));
 }
 
 int tsip_header_From_serialize(const tsip_header_t* header, tsk_buffer_t* output)
 {
 	int ret = -1;
 	if(header){
 		const tsip_header_From_t *From = (const tsip_header_From_t *)header;
 
 		/* Uri with hacked display-name*/
 		if((ret = tsip_uri_serialize(From->uri, tsk_true, tsk_true, output))){
 			return ret;
 		}
 		if(From->tag){
 			ret = tsk_buffer_append_2(output, ";tag=%s", From->tag);
 		}
 	}
 	return ret;
 }
 
 tsip_header_From_t *tsip_header_From_parse(const char *data, tsk_size_t size)
 {
 	int cs = 0;
 	const char *p = data;
 	const char *pe = p + size;
 	const char *eof = pe;
 	tsip_header_From_t *hdr_from = tsip_header_From_create(tsk_null, tsk_null, tsk_null);
 	
 	const char *tag_start = tsk_null;
 
 	%%write data;
 	(void)(eof);
 	(void)(tsip_machine_parser_header_From_first_final);
 	(void)(tsip_machine_parser_header_From_error);
 	(void)(tsip_machine_parser_header_From_en_main);
 	%%write init;
 	%%write exec;
 	
 	if( cs < %%{ write first_final; }%% ){
 		TSK_DEBUG_ERROR("Failed to parse 'From' header.");
 		TSK_OBJECT_SAFE_FREE(hdr_from);
 	}
 	
 	return hdr_from;
 }
 
 
 
 
 
 
 
 //========================================================
 //	From header object definition
 //
 
 static tsk_object_t* tsip_header_From_ctor(tsk_object_t *self, va_list * app)
 {
 	tsip_header_From_t *From = self;
 	if(From){
 		const char* display_name = va_arg(*app, const char *);
 		const tsip_uri_t* uri = va_arg(*app, const tsip_uri_t *);
 		const char* tag = va_arg(*app, const char *);
 
 		From->display_name = tsk_strdup(display_name);
 		if(uri) From->uri = tsk_object_ref((void *)uri);
 		From->tag = tsk_strdup(tag);
 
 		TSIP_HEADER(From)->type = tsip_htype_From;
 		TSIP_HEADER(From)->serialize = tsip_header_From_serialize;
 	}
 	else{
 		TSK_DEBUG_ERROR("Failed to create new From header.");
 	}
 	return self;
 }
 
 static tsk_object_t* tsip_header_From_dtor(tsk_object_t *self)
 {
 	tsip_header_From_t *From = self;
 	if(From){
 		TSK_FREE(From->display_name);
 		TSK_FREE(From->tag);
 
 		TSK_OBJECT_SAFE_FREE(From->uri);
 		TSK_OBJECT_SAFE_FREE(TSIP_HEADER_PARAMS(From));
 	}
 	else{
 		TSK_DEBUG_ERROR("Null From header.");
 	}
 
 	return self;
 }
 
 static const tsk_object_def_t tsip_header_From_def_s = 
 {
 	sizeof(tsip_header_From_t),
 	tsip_header_From_ctor,
 	tsip_header_From_dtor,
 	tsk_null
 };
 const tsk_object_def_t *tsip_header_From_def_t = &tsip_header_From_def_s;