1 files changed, 145 insertions, 0 deletions
diff --git a/patch/mpdcontrol.c b/patch/mpdcontrol.c
new file mode 100644
index 0000000..fc81e07
--- /dev/null
+++ b/patch/mpdcontrol.c
@@ -0,0 +1,145 @@
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <regex.h>
+
+#include <mpd/client.h>
+
+#define MPDHOST "localhost"
+#define MPDPORT 6600
+
+struct mpd_connection *get_conn()
+{
+    struct mpd_connection *conn;
+
+    conn = mpd_connection_new(MPDHOST, MPDPORT, 1000);
+
+    if (mpd_connection_get_error(conn) != MPD_ERROR_SUCCESS) {
+        fprintf(stderr, "Could not connect to mpd: %s\n", mpd_connection_get_error_message(conn));
+
+        mpd_connection_free(conn);
+        return NULL;
+    }
+
+    return conn;
+}
+
+void mpdchange(const Arg *direction)
+{
+    struct mpd_connection *conn;
+
+    conn = get_conn();
+
+    if (conn == NULL) {
+        return;
+    }
+
+    if (direction->i > 0) {
+        mpd_run_next(conn);
+    }
+    else {
+        mpd_run_previous(conn);
+    }
+
+    mpd_connection_free(conn);
+}
+
+char *get_regerror(int errcode, regex_t *compiled)
+{
+    size_t length = regerror(errcode, compiled, NULL, 0);
+    char *buffer = malloc(length);
+    (void) regerror(errcode, compiled, buffer, length);
+
+    return buffer;
+}
+
+void mpdcontrol()
+{
+    struct mpd_connection *conn;
+    struct mpd_status *status;
+    struct mpd_song *song;
+    enum mpd_state state;
+
+    const char *filename;
+
+    regex_t expr;
+
+    conn = get_conn();
+
+    if (conn == NULL) {
+        return;
+    }
+
+    status = mpd_run_status(conn);
+
+    if (status == NULL) {
+        fprintf(stderr, "Could not get mpd status: %s\n", mpd_status_get_error(status));
+
+        mpd_status_free(status);
+        mpd_connection_free(conn);
+        return;
+    }
+
+    state = mpd_status_get_state(status);
+
+    if (state == MPD_STATE_STOP || state == MPD_STATE_PAUSE) {
+        mpd_run_play(conn);
+        mpd_status_free(status);
+        mpd_connection_free(conn);
+    }
+    else if (state != MPD_STATE_UNKNOWN) { //playing some music
+        song = mpd_run_current_song(conn);
+
+        if (song == NULL){
+            fprintf(stderr, "Error fetching current song!\n");
+
+            mpd_song_free(song);
+            mpd_status_free(status);
+            mpd_connection_free(conn);
+            return;
+        }
+
+        filename = mpd_song_get_uri(song);
+
+        int errcode = regcomp(&expr, "^[[:alnum:]]+://", REG_EXTENDED|REG_NOSUB);
+        if (errcode != 0) {
+            char *err = get_regerror(errcode, &expr);
+            fprintf(stderr, "Could not compile regexp: %s\n", err);
+
+            mpd_song_free(song);
+            mpd_status_free(status);
+            mpd_connection_free(conn);
+            free(err);
+            regfree(&expr);
+            return;
+        }
+
+        int matchcode = regexec(&expr, filename, 0, NULL, 0);
+
+        if (matchcode == 0) {
+            if (strstr(filename, "file://") == filename) { //match just at the start of the filename
+                //this means that mpd is playing a file outside the music_dir,
+                //but on disk, so we can safely pause
+                mpd_run_toggle_pause(conn);
+            }
+            else {
+                mpd_run_stop(conn);
+            }
+        }
+        else if (matchcode == REG_NOMATCH) {
+            mpd_run_toggle_pause(conn);
+        }
+        else {
+            char *err = get_regerror(matchcode, &expr);
+            fprintf(stderr, "Error while matching regexp: %s\n", err);
+
+            free(err);
+        }
+
+        regfree(&expr);
+        mpd_song_free(song);
+        mpd_status_free(status);
+        mpd_connection_free(conn);
+    }
+}
+