Add ability to reorder playlist items

server/app/playlists.go

@@ -4,16 +4,13 @@ import (
 	"encoding/json"
 	"fmt"
 	"net/http"
+	"strconv"
 
 	"github.com/deluan/navidrome/log"
 	"github.com/deluan/navidrome/model"
 	"github.com/deluan/navidrome/utils"
 )
 
-type addTracksPayload struct {
-	Ids []string `json:"ids"`
-}
-
 func deleteFromPlaylist(ds model.DataStore) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
 		playlistId := utils.ParamString(r, ":playlistId")
@@ -38,6 +35,10 @@ func deleteFromPlaylist(ds model.DataStore) http.HandlerFunc {
 }
 
 func addToPlaylist(ds model.DataStore) http.HandlerFunc {
+	type addTracksPayload struct {
+		Ids []string `json:"ids"`
+	}
+
 	return func(w http.ResponseWriter, r *http.Request) {
 		playlistId := utils.ParamString(r, ":playlistId")
 		tracksRepo := ds.Playlist(r.Context()).Tracks(playlistId)
@@ -60,3 +61,40 @@ func addToPlaylist(ds model.DataStore) http.HandlerFunc {
 		}
 	}
 }
+
+func reorderItem(ds model.DataStore) http.HandlerFunc {
+	type reorderPayload struct {
+		InsertBefore string `json:"insert_before"`
+	}
+
+	return func(w http.ResponseWriter, r *http.Request) {
+		playlistId := utils.ParamString(r, ":playlistId")
+		id := utils.ParamInt(r, ":id", 0)
+		if id == 0 {
+			http.Error(w, "invalid id", http.StatusBadRequest)
+			return
+		}
+		tracksRepo := ds.Playlist(r.Context()).Tracks(playlistId)
+		var payload reorderPayload
+		err := json.NewDecoder(r.Body).Decode(&payload)
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusBadRequest)
+			return
+		}
+		newPos, err := strconv.Atoi(payload.InsertBefore)
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusBadRequest)
+			return
+		}
+		err = tracksRepo.Reorder(id, newPos)
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusBadRequest)
+			return
+		}
+
+		_, err = w.Write([]byte(fmt.Sprintf(`{"id":"%d"}`, id)))
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+		}
+	}
+}