/**
 * mds — A micro-display server
 * Copyright © 2014  Mattias Andrée (maandree@member.fsf.org)
 * 
 * This program 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.
 * 
 * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 */
#ifndef MDS_MDS_REGISTRY_H
#define MDS_MDS_REGISTRY_H


#include "mds-base.h"

#include <stdint.h>


/**
 * Handle the received message
 * 
 * @return  Zero on success -1 on error or interruption,
 *          errno will be set accordingly
 */
int handle_message(void);

/**
 * Convert a client ID string into a client ID integer
 * 
 * @param   str  The client ID string
 * @return       The client ID integer
 */
uint64_t parse_client_id(const char* str);

/**
 * Perform an action over the registry
 * 
 * @param   length           The length of the received message
 * @param   action           -1 to remove command, +1 to add commands, 0 to
 *                           wait until the message commnds are registered
 * @param   recv_client_id   The ID of the client
 * @param   recv_message_id  The ID of the received message
 * @return                   Zero on success -1 on error or interruption,
 *                           errno will be set accordingly
 */
int registry_action(size_t length, int action, const char* recv_client_id, const char* recv_message_id);

/**
 * Send a list of all registered commands to a client
 * 
 * @param   recv_client_id   The ID of the client
 * @param   recv_message_id  The ID of the received message
 * @return                   Zero on success -1 on error or interruption,
 *                           errno will be set accordingly
 */
int list_registry(const char* recv_client_id, const char* recv_message_id);

/**
 * Free a key from a table
 * 
 * @param  obj  The key
 */
void reg_table_free_key(size_t obj);

/**
 * Free a value from a table
 * 
 * @param  obj  The value
 */
void reg_table_free_value(size_t obj);

/**
 * Send a full message even if interrupted
 * 
 * @param   message  The message to send
 * @param   length   The length of the message
 * @return           Non-zero on success
 */
int full_send(const char* message, size_t length);


#endif