ympd/src/mpd_client.h

/* ympd
   (c) 2013-2014 Andrew Karpow <andy@ndyk.de>
   This project's homepage is: http://www.ympd.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; version 2 of the License.

   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, write to the Free Software Foundation, Inc.,
   Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
   
#ifndef __MPD_CLIENT_H__
#define __MPD_CLIENT_H__

#include "mongoose.h"

#define RETURN_ERROR_AND_RECOVER(X) do { \
    fprintf(stderr, "MPD X: %s\n", mpd_connection_get_error_message(mpd.conn)); \
    cur += snprintf(cur, end  - cur, "{\"type\":\"error\",\"data\":\"%s\"}", \
    mpd_connection_get_error_message(mpd.conn)); \
    if (!mpd_connection_clear_error(mpd.conn)) \
        mpd.conn_state = MPD_FAILURE; \
    return cur - buffer; \
} while(0)


#define MAX_SIZE 1024 * 100
#define MAX_ELEMENTS_PER_PAGE 512

#define GEN_ENUM(X) X,
#define GEN_STR(X) #X,
#define MPD_CMDS(X) \
    X(MPD_API_GET_QUEUE) \
    X(MPD_API_GET_BROWSE) \
    X(MPD_API_GET_MPDHOST) \
    X(MPD_API_ADD_TRACK) \
    X(MPD_API_ADD_PLAY_TRACK) \
    X(MPD_API_ADD_PLAYLIST) \
    X(MPD_API_PLAY_TRACK) \
    X(MPD_API_RM_TRACK) \
    X(MPD_API_RM_ALL) \
    X(MPD_API_SEARCH) \
    X(MPD_API_SET_VOLUME) \
    X(MPD_API_SET_PAUSE) \
    X(MPD_API_SET_PLAY) \
    X(MPD_API_SET_STOP) \
    X(MPD_API_SET_SEEK) \
    X(MPD_API_SET_NEXT) \
    X(MPD_API_SET_PREV) \
    X(MPD_API_SET_MPDHOST) \
    X(MPD_API_SET_MPDPASS) \
    X(MPD_API_UPDATE_DB) \
    X(MPD_API_TOGGLE_RANDOM) \
    X(MPD_API_TOGGLE_CONSUME) \
    X(MPD_API_TOGGLE_SINGLE) \
    X(MPD_API_TOGGLE_REPEAT)

enum mpd_cmd_ids {
    MPD_CMDS(GEN_ENUM)
};

enum mpd_conn_states {
    MPD_DISCONNECTED,
    MPD_FAILURE,
    MPD_CONNECTED,
    MPD_RECONNECT,
    MPD_DISCONNECT
};

struct t_mpd {
    int port;
    char host[128];
    char *password;

    struct mpd_connection *conn;
    enum mpd_conn_states conn_state;

    /* Reponse Buffer */
    char buf[MAX_SIZE];
    size_t buf_size;

    int song_id;
    unsigned queue_version;
} mpd;

struct t_mpd_client_session {
    int song_id;
    unsigned queue_version;
};

void mpd_poll(struct mg_server *s);
int callback_mpd(struct mg_connection *c);
int mpd_close_handler(struct mg_connection *c);
int mpd_put_state(char *buffer, int *current_song_id, unsigned *queue_version);
int mpd_put_current_song(char *buffer);
int mpd_put_queue(char *buffer, unsigned int offset);
int mpd_put_browse(char *buffer, char *path, unsigned int offset);
int mpd_search(char *buffer, char *searchstr);
void mpd_disconnect();
#endif