library picker lit element w reactive properties

backend/library/library.go

@@ -3,10 +3,12 @@ package library
 import (
 	"context"
 	"fmt"
+	"os"
 )
 
 type Config struct {
 	DirectoryPath string
+	SaveFunc      func() error `toml:"-"`
 }
 
 func (c *Config) Validate() error {
@@ -27,7 +29,7 @@ func NewLibrary(conf *Config) (*Library, error) {
 		return nil, fmt.Errorf("nil config for library")
 	}
 	if err := conf.Validate(); err != nil {
-		return nil, fmt.Errorf("invalid library config %s\n%w", conf, err)
+		return nil, fmt.Errorf("invalid library config %#v: %w", conf, err)
 	}
 	return &Library{
 		conf: conf,
@@ -42,3 +44,20 @@ func (l *Library) Init(ctx context.Context) error {
 func (l *Library) GetDir() (string, error) {
 	return l.conf.DirectoryPath, nil
 }
+
+func (l *Library) SetDir(dirPath string) error {
+	fileInfo, err := os.Stat(dirPath)
+	if err != nil {
+		return fmt.Errorf("could not stat %s: %w", dirPath, err)
+	}
+	if !fileInfo.IsDir() {
+		return fmt.Errorf("dirPath is not a directory: %s", dirPath)
+	}
+
+	l.conf.DirectoryPath = dirPath
+	err = l.conf.SaveFunc()
+	if err != nil {
+		return fmt.Errorf("could not save library dir config: %w", err)
+	}
+	return nil
+}