add attach playlist feature

NOTES.md

@@ -47,7 +47,7 @@
 - Playlist browser
   - [x] Show current playlists
   - [x] `Replace` current queue with playlist button
-  - [ ] `Attach` playlist to current queue button
+  - [x] `Attach` playlist to current queue button
   - [ ] `Save` current queue as playlist button
     - [x] Show dialog
   - [ ] `Delete` selected playlist button
@@ -78,6 +78,7 @@
   - [x] GET `/api/queue/:song_id/delete`
   - [x] GET `/api/queue/:song_id/move/:position`
   - [x] GET `/api/queue/replace/:playlist_name`
+  - [x] GET `/api/queue/attach/:playlist_name`
   - [ ] `/api/list_database/:path`
   - [x] GET `/api/playlists`
   - [x] GET `/api/playlists/:name`

mpd.go

@@ -335,3 +335,22 @@ func replaceQueue(c echo.Context) error {
 
 	return c.JSON(http.StatusOK, "")
 }
+
+func attachPlaylist(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()
+
+	name := c.Param("playlist_name")
+
+	err = conn.PlaylistLoad(name, -1, -1)
+	if err != nil {
+		c.Logger().Error(err)
+		return c.String(http.StatusBadRequest, err.Error())
+	}
+
+	return c.JSON(http.StatusOK, "")
+}

server.go

@@ -92,6 +92,7 @@ func main() {
 	g.GET("/queue/:song_id/delete", deleteTrackFromQueue)
 	g.GET("/queue/:song_id/move/:position", moveTrackInQueue)
 	g.GET("/queue/replace/:playlist_name", replaceQueue)
+	g.GET("/queue/attach/:playlist_name", attachPlaylist)
 
 	g.GET("/playlists", listPlaylists)
 	g.GET("/playlists/:name", listPlaylist)

static/index.js

@@ -127,7 +127,7 @@ control_replace_playlist.addEventListener("click", () => {
 });
 
 control_attach_playlist.addEventListener("click", () => {
-  fetch(`${API_URL}/`).then(async r => {
+  fetch(`${API_URL}/queue/attach/${control_playlist_list.value}`).then(async r => {
     if (r.status !== 200) {
       console.error(`API returned ${r.status}: ${r.statusText}`);
     }