feat: better way to detect initial account creation

server/app/app.go

@@ -49,6 +49,7 @@ func (app *Router) routes() http.Handler {
 	})
 
 	// Serve UI app assets
+	r.Handle("/", ServeIndex(app.ds))
 	r.Handle("/*", http.StripPrefix(app.path, http.FileServer(assets.AssetFile())))
 
 	return r

server/app/serve_index.go

@@ -0,0 +1,43 @@
+package app
+
+import (
+	"encoding/json"
+	"html/template"
+	"io/ioutil"
+	"net/http"
+
+	"github.com/deluan/navidrome/assets"
+	"github.com/deluan/navidrome/log"
+	"github.com/deluan/navidrome/model"
+)
+
+// Injects the `firstTime` config in the `index.html` template
+func ServeIndex(ds model.DataStore) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		c, err := ds.User(r.Context()).CountAll()
+		firstTime := c == 0 && err == nil
+
+		t := template.New("initial state")
+		fs := assets.AssetFile()
+		indexHtml, err := fs.Open("index.html")
+		if err != nil {
+			log.Error(r, "Could not find `index.html` template", err)
+		}
+		indexStr, err := ioutil.ReadAll(indexHtml)
+		if err != nil {
+			log.Error(r, "Could not read from `index.html`", err)
+		}
+		t, _ = t.Parse(string(indexStr))
+		appConfig := map[string]interface{}{
+			"firstTime": firstTime,
+		}
+		j, _ := json.Marshal(appConfig)
+		data := map[string]interface{}{
+			"AppConfig": string(j),
+		}
+		err = t.Execute(w, data)
+		if err != nil {
+			log.Error(r, "Could not execute `index.html` template", err)
+		}
+	}
+}