removed app, reorganized logic into modules

backend/frontendbindings/frontendbindings.go

@@ -0,0 +1,38 @@
+package frontendbindings
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/wailsapp/wails/v2/pkg/runtime"
+)
+
+// FrontendBindings contain any Go functions that are specific to the frontend only and need to be bound
+type FrontendBindings struct {
+	ctx context.Context
+}
+
+func NewFrontendBindings() (*FrontendBindings, error) {
+	return &FrontendBindings{}, nil
+}
+
+func (fe *FrontendBindings) Init(ctx context.Context) error {
+	fe.ctx = ctx
+	return nil
+}
+
+// Open a directory picker
+func (fe *FrontendBindings) DirectoryPicker() (string, error) {
+	runtime.LogInfo(fe.ctx, "selecting a directory")
+	dir, err := runtime.OpenDirectoryDialog(
+		fe.ctx,
+		runtime.OpenDialogOptions{})
+	if err != nil {
+		return "", fmt.Errorf("could not open directory dialog\n%w", err)
+	}
+	if dir == "" {
+		return "No Library Directory Selected", nil
+	}
+
+	return dir, nil
+}