Feat: jukebox mode #37

htdocs/index.html

@@ -709,6 +709,13 @@
               <div class="invalid-feedback">Must be a number.</div>
             </div>            
           </div>
+          <div class="row">
+            <div class="form-group col-md-6" data-toggle="buttons">
+              <button data-href='{"cmd": "toggleBtn", "options": ["btnJukebox"]}' id="btnJukebox" type="button" class="btn btn-secondary btn-block" title="Jukebox">
+                Jukebox
+              </button>
+            </div>
+          </div>
           <hr/>
           <div class="row">
             <div class="form-group col-md-6" data-toggle="buttons">

src/mpd_client.c

@@ -57,7 +57,6 @@ void callback_mympd(struct mg_connection *nc, const struct mg_str msg) {
     int je, int_buf, int_rc; 
     float float_buf;
     char *p_charbuf1, *p_charbuf2, *p_charbuf3;
-    struct mympd_state { int a; int b; } state = { .a = 0, .b = 1 };
     enum mpd_cmd_ids cmd_id;
     struct pollfd fds[1];
     int pollrc;
@@ -113,11 +112,17 @@ void callback_mympd(struct mg_connection *nc, const struct mg_str msg) {
             n = mympd_put_state(mpd.buf, &mpd.song_id, &mpd.next_song_id, &mpd.last_song_id, &mpd.queue_version, &mpd.queue_length);
             break;
         case MPD_API_SETTINGS_SET:
-            je = json_scanf(msg.p, msg.len, "{data: {notificationWeb: %d, notificationPage: %d}}", &state.a, &state.b);
+            je = json_scanf(msg.p, msg.len, "{data: {notificationWeb: %B, notificationPage: %B, jukeboxMode: %B}}", 
-            if (je == 2) {
+                &mympd_state.notificationWeb, 
+                &mympd_state.notificationPage,
+                &mympd_state.jukeboxMode);
+            if (je == 3) {
                 char tmp_file[200];
                 snprintf(tmp_file, 200, "%s.tmp", config.statefile);
-                json_fprintf(tmp_file, "{notificationWeb: %d, notificationPage: %d}", state.a, state.b);
+                json_fprintf(tmp_file, "{notificationWeb: %B, notificationPage: %B, jukeboxMode: %B}", 
+                    mympd_state.notificationWeb,
+                    mympd_state.notificationPage,
+                    mympd_state.jukeboxMode);
                 rename(tmp_file, config.statefile);
             }
             
@@ -541,6 +546,8 @@ void mympd_parse_idle(struct mg_mgr *s, int idle_bitmask) {
                     break;
                 case MPD_IDLE_QUEUE:
                     len = snprintf(mpd.buf, MAX_SIZE, "{\"type\": \"update_queue\"}");
+                    if (mympd_state.jukeboxMode == true)
+                        mympd_jukebox();
                     break;
                 case MPD_IDLE_PLAYER:
                     len = mympd_put_state(mpd.buf, &mpd.song_id, &mpd.next_song_id, &mpd.last_song_id, &mpd.queue_version, &mpd.queue_length);
@@ -720,6 +727,8 @@ void mympd_idle(struct mg_mgr *s, int timeout) {
             mpd_connection_set_timeout(mpd.conn, mpd.timeout);
             mpd.conn_state = MPD_CONNECTED;
             mympd_mpd_features();
+            if (mympd_state.jukeboxMode == true)
+                        mympd_jukebox();
             mpd_send_idle(mpd.conn);
             break;
 
@@ -908,6 +917,51 @@ char* mympd_get_tag(struct mpd_song const *song, enum mpd_tag_type tag) {
     return str;
 }
 
+void mympd_jukebox() {
+    struct mpd_status *status;
+    status = mpd_run_status(mpd.conn);
+    int queue_length, num_songs, rand_song, i;
+    struct mpd_entity *entity;
+    const struct mpd_song *song;
+    
+    if (!status) {
+        printf("MPD mpd_run_status: %s\n", mpd_connection_get_error_message(mpd.conn));
+        mpd.conn_state = MPD_FAILURE;
+        return;
+    }
+    queue_length = mpd_status_get_queue_length(status);
+    mpd_status_free(status);
+    if (queue_length > 0)
+        return;
+    
+    struct mpd_stats *stats = mpd_run_stats(mpd.conn);
+    num_songs = mpd_stats_get_number_of_songs(stats);
+    mpd_stats_free(stats);
+    num_songs--;
+    if (num_songs > 0) {
+        srand((unsigned int)time(NULL));
+        rand_song = rand() % num_songs;
+        mpd_send_list_all(mpd.conn, "/");
+        i = 0;
+        while ((entity = mpd_recv_entity(mpd.conn)) != NULL) {
+            if (mpd_entity_get_type(entity) == MPD_ENTITY_TYPE_SONG) {
+                if (i == rand_song)
+                        break;
+                i++;
+            }
+            mpd_entity_free(entity);
+        }
+        mpd_response_finish(mpd.conn);
+        song = mpd_entity_get_song(entity);        
+        if (song != NULL) {
+            printf("Jukebox enabled, playing random song %d/%d\n", rand_song, num_songs);
+            mpd_run_add(mpd.conn, mpd_song_get_uri(song));
+            mpd_run_play(mpd.conn);
+        }
+        mpd_entity_free(entity);
+    }
+}
+
 int mympd_put_state(char *buffer, int *current_song_id, int *next_song_id, int *last_song_id, unsigned *queue_version, unsigned *queue_length) {
     struct mpd_status *status;
     const struct mpd_audio_format *audioformat;
@@ -976,20 +1030,7 @@ int mympd_put_settings(char *buffer) {
     struct mpd_status *status;
     char *replaygain = strdup("");
     int len;
-    int je;
     struct json_out out = JSON_OUT_BUF(buffer, MAX_SIZE);
-    struct mympd_state { int a; int b; } state = { .a = 0, .b = 0 };
-    if (access( config.statefile, F_OK ) != -1 ) {
-        char *content = json_fread(config.statefile);
-        je = json_scanf(content, strlen(content), "{notificationWeb: %d, notificationPage: %d}", &state.a, &state.b);
-        if (je != 2) {
-          state.a = 0;
-          state.b = 1;
-        }
-    } else {
-        state.a = 0;
-        state.b = 1;
-    }
     
     status = mpd_run_status(mpd.conn);
     if (!status) {
@@ -1009,8 +1050,8 @@ int mympd_put_settings(char *buffer) {
     len = json_printf(&out, "{type: settings, data: {"
         "repeat: %d, single: %d, crossfade: %d, consume: %d, random: %d, "
         "mixrampdb: %f, mixrampdelay: %f, mpdhost: %Q, mpdport: %d, passwort_set: %B, "
-        "streamport: %d, coverimage: %Q, stickers: %B, mixramp: %B, "
+        "streamport: %d, coverimage: %Q, stickers: %B, mixramp: %B, maxElementsPerPage: %d, "
-        "maxElementsPerPage: %d, replaygain: %Q, notificationWeb: %d, notificationPage: %d, "
+        "replaygain: %Q, notificationWeb: %B, notificationPage: %B, jukeboxMode: %B, "
         "tags: { Artist: %B, Album: %B, AlbumArtist: %B, Title: %B, Track: %B, Genre: %B, Date: %B,"
         "Composer: %B, Performer: %B }"
         "}}", 
@@ -1030,8 +1071,9 @@ int mympd_put_settings(char *buffer) {
         config.mixramp,
         MAX_ELEMENTS_PER_PAGE,
         replaygain,
-        state.a,
+        mympd_state.notificationWeb,
-        state.b,
+        mympd_state.notificationPage,
+        mympd_state.jukeboxMode,
         mpd.tag_artist,
         mpd.tag_album,
         mpd.tag_album_artist,

src/mpd_client.h

@@ -171,6 +171,14 @@ typedef struct {
     long like;
 } t_sticker;
 
+typedef struct {
+    bool notificationWeb;
+    bool notificationPage;
+    bool jukeboxMode;
+} t_mympd_state;
+
+t_mympd_state mympd_state;
+
 static int is_websocket(const struct mg_connection *nc) {
     return nc->flags & MG_F_IS_WEBSOCKET;
 }
@@ -185,6 +193,7 @@ void mympd_like_song_uri(const char *uri, int value);
 void mympd_last_played_song_uri(const char *uri);
 void mympd_last_played_song_id(int song_id);
 void mympd_get_sticker(const char *uri, t_sticker *sticker);
+void mympd_jukebox();
 int mympd_get_updatedb_state(char *buffer);
 int mympd_put_state(char *buffer, int *current_song_id, int *next_song_id, int *last_song_id, unsigned *queue_version, unsigned *queue_length);
 int mympd_put_outputs(char *buffer);

src/mympd.c

@@ -31,6 +31,7 @@
 #include <grp.h>
 
 #include "../dist/src/mongoose/mongoose.h"
+#include "../dist/src/frozen/frozen.h"
 #include "../dist/src/inih/ini.h"
 #include "mpd_client.h"
 #include "config.h"
@@ -233,6 +234,23 @@ int main(int argc, char **argv) {
         return EXIT_FAILURE;
     }
 
+    if (access( config.statefile, F_OK ) != -1 ) {
+        char *content = json_fread(config.statefile);
+        int je = json_scanf(content, strlen(content), "{notificationWeb: %B, notificationPage: %B, jukeboxMode: %B}", 
+            &mympd_state.notificationWeb, 
+            &mympd_state.notificationPage,
+            &mympd_state.jukeboxMode);
+        if (je != 3) {
+            mympd_state.notificationWeb = false;
+            mympd_state.notificationPage = true;
+            mympd_state.jukeboxMode = false;
+        }
+    } else {
+        mympd_state.notificationWeb = false;
+        mympd_state.notificationPage = true;
+        mympd_state.jukeboxMode = false;
+    }
+
     signal(SIGTERM, signal_handler);
     signal(SIGINT, signal_handler);
     setvbuf(stdout, NULL, _IOLBF, 0);
@@ -302,7 +320,6 @@ int main(int argc, char **argv) {
     s_http_server_opts.document_root = SRC_PATH;
     s_http_server_opts.enable_directory_listing = "no";
 
-
     printf("Listening on http port %s\n", config.webport);
     if (config.ssl == true)
         printf("Listening on ssl port %s\n", config.sslport);