/*
 * Copyright (C) 2010-2015 Mamadou Diop.
 *	
 * 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_A.c
  * @brief SDP "a=" header (Attributes).
  * 
  */
 #include "tinysdp/headers/tsdp_header_A.h"
 
 #include "tsk_debug.h"
 #include "tsk_memory.h"
 #include "tsk_string.h"
 
 #include <string.h>
 
 /***********************************
 *	Ragel state machine.
 */
 %%{
 	machine tsdp_machine_parser_header_A;
 
 	# Includes
 	include tsdp_machine_utils "./ragel/tsdp_machine_utils.rl";
 	
 	action tag{
 		tag_start = p;
 	}
 	
 	action parse_field{
 		TSK_PARSER_SET_STRING(hdr_A->field);
 	}
 	
 	action parse_value{
 		TSK_PARSER_SET_STRING(hdr_A->value);
 	}
 	
 	field = token>tag %parse_field;
 	value = any*>tag %parse_value;
 	
 	A = 'a' SP* "=" SP*<: ((field ":" value) | (field));
 	
 	# Entry point
 	main := A :>CRLF?;
 
 }%%
 
 
 
 tsdp_header_A_t* tsdp_header_A_create(const char* field, const char* value)
 {
         return tsk_object_new(TSDP_HEADER_A_VA_ARGS(field, value));
 }
 
 tsdp_header_A_t* tsdp_header_A_create_null()
 {
         return tsdp_header_A_create(tsk_null, tsk_null);
 }
 
 
 int tsdp_header_A_tostring(const tsdp_header_t* header, tsk_buffer_t* output)
 {
         if(header){
                 const tsdp_header_A_t *A = (const tsdp_header_A_t *)header;
                 
                 return tsk_buffer_append_2(output, "%s%s%s",
                         A->field,
 
                         A->value ? ":" : "",
                         A->value ? A->value : ""
                         );
         }
 
         return -1;
 }
 
 tsdp_header_t* tsdp_header_A_clone(const tsdp_header_t* header)
 {
         if(header){
                 const tsdp_header_A_t *A = (const tsdp_header_A_t *)header;
                 return (tsdp_header_t*)tsdp_header_A_create(A->field, A->value);
         }
         return tsk_null;
 }
 
 tsdp_header_A_t *tsdp_header_A_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_A_t *hdr_A = tsdp_header_A_create_null();
 	
 	const char *tag_start = tsk_null;
 
 	TSK_RAGEL_DISABLE_WARNINGS_BEGIN()
 	%%write data;
 	%%write init;
 	(void)(tsdp_machine_parser_header_A_first_final);
 	(void)(tsdp_machine_parser_header_A_error);
 	(void)(tsdp_machine_parser_header_A_en_main);
 	%%write exec;
 	TSK_RAGEL_DISABLE_WARNINGS_END()
 	
 	if( cs < %%{ write first_final; }%% ){
 		TSK_DEBUG_ERROR("Failed to parse \"a=\" header.");
 		TSK_OBJECT_SAFE_FREE(hdr_A);
 	}
 	
 	return hdr_A;
 }
 
 
 int tsdp_header_A_removeAll_by_field(tsdp_headers_A_L_t *attributes, const char* field)
 {
         tsk_list_item_t* item;
         const tsdp_header_A_t* A;
 
         if(!attributes || !field){
                 TSK_DEBUG_ERROR("Invalid parameter");
                 return -1;
         }
 
 again:
         tsk_list_foreach(item, attributes){
                 if(!(A = item->data) || TSDP_HEADER(A)->type != tsdp_htype_A){
                         continue;
                 }
                 if(tsk_striequals(field, A->field)){
                         tsk_list_remove_item(attributes, item);
                         goto again;
                 }
         }
 
         return 0;
 }
 
 int tsdp_header_A_removeAll_by_fields(tsdp_headers_A_L_t *attributes, const char** fields, tsk_size_t fields_count)
 {
         tsk_size_t i;
 
         if(!attributes || !fields){
                 TSK_DEBUG_ERROR("Invalid parameter");
                 return -1;
         }
 
         for(i = 0; i < fields_count; ++i){
                 if(!fields[i]){
                         continue;
                 }
                 tsdp_header_A_removeAll_by_field(attributes, fields[i]);
         }
         return 0;
 }
 
 
 
 
 //========================================================
 //      A header object definition
 //
 
 static tsk_object_t* tsdp_header_A_ctor(tsk_object_t *self, va_list * app)
 {
         tsdp_header_A_t *A = self;
         if(A)
         {
                 TSDP_HEADER(A)->type = tsdp_htype_A;
                 TSDP_HEADER(A)->tostring = tsdp_header_A_tostring;
                 TSDP_HEADER(A)->clone = tsdp_header_A_clone;
                 TSDP_HEADER(A)->rank = TSDP_HTYPE_A_RANK;
                 
                 A->field = tsk_strdup(va_arg(*app, const char*));
                 A->value = tsk_strdup(va_arg(*app, const char*));
         }
         else{
                 TSK_DEBUG_ERROR("Failed to create new A header.");
         }
         return self;
 }
 
 static tsk_object_t* tsdp_header_A_dtor(tsk_object_t *self)
 {
         tsdp_header_A_t *A = self;
         if(A){
                 TSK_FREE(A->field);
                 TSK_FREE(A->value);
         }
         else{
                 TSK_DEBUG_ERROR("Null A header.");
         }
 
         return self;
 }
 static int tsdp_header_A_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_A_def_s = 
 {
         sizeof(tsdp_header_A_t),
         tsdp_header_A_ctor,
         tsdp_header_A_dtor,
         tsdp_header_A_cmp
 };
 
 const tsk_object_def_t *tsdp_header_A_def_t = &tsdp_header_A_def_s;