feat(mpd): Add support for date (#222)

include/adapters/mpd.hpp

@@ -63,6 +63,7 @@ namespace mpd {
     string get_artist();
     string get_album();
     string get_title();
+    string get_date();
     unsigned get_duration();
 
    private:

src/adapters/mpd.cpp

@@ -76,6 +76,15 @@ namespace mpd {
     return string{tag};
   }
 
+  string mpdsong::get_date() {
+    assert(m_song);
+    auto tag = mpd_song_get_tag(m_song.get(), MPD_TAG_DATE, 0);
+    if (tag == nullptr) {
+      return "";
+    }
+    return string{tag};
+  }
+
   string mpdsong::get_title() {
     assert(m_song);
     auto tag = mpd_song_get_tag(m_song.get(), MPD_TAG_TITLE, 0);

src/modules/mpd.cpp

@@ -191,6 +191,7 @@ namespace modules {
     string artist;
     string album;
     string title;
+    string date;
     string elapsed_str;
     string total_str;
 
@@ -207,6 +208,7 @@ namespace modules {
           artist = song->get_artist();
           album = song->get_album();
           title = song->get_title();
+          date = song->get_date();
         }
       }
     } catch (const mpd_exception& err) {
@@ -219,6 +221,7 @@ namespace modules {
       m_label_song->replace_token("%artist%", !artist.empty() ? artist : "untitled artist");
       m_label_song->replace_token("%album%", !album.empty() ? album : "untitled album");
       m_label_song->replace_token("%title%", !title.empty() ? title : "untitled track");
+      m_label_song->replace_token("%date%", !date.empty() ? date : "unknown date");
     }
 
     if (m_label_time) {