add list playlists

mpd.go

@@ -238,3 +238,22 @@ func deleteTrackFromQueue(c echo.Context) error {
 
 	return c.String(http.StatusOK, "")
 }
+
+// Playlists
+
+func listPlaylists(c echo.Context) error {
+	// Connect to MPD server
+	conn, err := mpd.Dial("tcp", "localhost:6600")
+	if err != nil {
+		c.Logger().Error(err)
+	}
+	defer conn.Close()
+
+	playlists, err := conn.ListPlaylists()
+	if err != nil {
+		c.Logger().Error(err)
+		return c.String(http.StatusBadRequest, err.Error())
+	}
+
+	return c.JSON(http.StatusOK, playlists)
+}

server.go

@@ -91,6 +91,8 @@ func main() {
 
 	g.GET("/queue/delete/:song_id", deleteTrackFromQueue)
 
+	g.GET("/playlists", listPlaylists)
+
 	g.GET("/download", downloadTrack)
 
 	e.GET("/ws", wsServe)

static/controls.js

@@ -106,6 +106,18 @@ tab_search.addEventListener("click", e => {
 });
 
 tab_playlists.addEventListener("click", e => {
+  fetch(`${API_URL}/playlists`).then(async r => {
+    if (r.status === 200) {
+      const playlists = await r.json();
+      control_playlist_list.options.length = 0;  // clear playlists
+      playlists.forEach(p => {
+        const option = document.createElement("option")
+        option.appendChild(document.createTextNode(p["playlist"]));
+        option.value = p["playlist"];
+        control_playlist_list.appendChild(option)
+      });
+    }
+  });
   if (!tab_playlists.classList.contains("active")) {
     tab_browser.classList.remove("active");
     tab_search.classList.remove("active")