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	mpd.c - spoon - set dwm status
	git clone git://git.codemadness.org/spoon
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	---
	mpd.c (1662B)
	---
	1 #include <err.h>
	2 #include <stdio.h>
	3
	4 #include <mpd/client.h>
	5
	6 #include "types.h"
	7 #include "util.h"
	8
	9 char *anim[] = {
	10 "!!.\|.",
	11 "\|!.!.",
	12 "!.!!.",
	13 "!!\|.!",
	14 ".!!\|!",
	15 };
	16
	17 int
	18 mpdread(void arg, char buf, size_t len)
	19 {
	20 static struct mpd_connection *conn;
	21 struct mpd_status *status;
	22 enum mpd_state state;
	23 struct mpd_song *song;
	24 const char artist, title;
	25 struct mpdarg *mpdarg = arg;
	26 static int frame = 0;
	27
	28 #define CHECK_CONNECTION(conn) \
	29 if (mpd_connection_get_error(conn) != MPD_ERROR_SUCCESS) { \
	30 warnx("mpd_connection_get_error: %s", \
	31 mpd_connection_get_error_message(conn)); \
	32 goto out; \
	33 }
	34
	35 if (conn == NULL) {
	36 conn = mpd_connection_new(mpdarg->host, mpdarg->port, 0);
	37 if (conn == NULL)
	38 return -1;
	39 CHECK_CONNECTION(conn);
	40 }
	41 mpd_send_status(conn);
	42 status = mpd_recv_status(conn);
	43 if (status == NULL) {
	44 CHECK_CONNECTION(conn);
	45 mpd_response_finish(conn);
	46 return -1;
	47 }
	48 state = mpd_status_get_state(status);
	49 mpd_status_free(status);
	50 mpd_response_finish(conn);
	51 if (state != MPD_STATE_PLAY && state != MPD_STATE_PAUSE)
	52 return -1;
	53 mpd_send_current_song(conn);
	54 song = mpd_recv_song(conn);
	55 if (song == NULL) {
	56 CHECK_CONNECTION(conn);
	57 mpd_response_finish(conn);
	58 return -1;
	59 }
	60 artist = mpd_song_get_tag(song, MPD_TAG_ARTIST, 0);
	61 title = mpd_song_get_tag(song, MPD_TAG_TITLE, 0);
	62 if (artist != NULL && title != NULL) {
	63 snprintf(buf, len, "%s - %s", artist, title);
	64 } else if (title != NULL) {
	65 strlcpy(buf, title, len);
	66 } else {
	67 strlcpy(buf, anim[frame++ % LEN(anim)], len);
	68 }
	69 mpd_song_free(song);
	70 mpd_response_finish(conn);
	71 return 0;
	72 out:
	73 mpd_connection_free(conn);
	74 conn = NULL;
	75 return -1;
	76 }