Move shared logic into separate file

cmd/shared.go

@@ -0,0 +1,46 @@
+package cmd
+
+import (
+	"errors"
+
+	"github.com/charmbracelet/huh"
+	"github.com/lewissteele/dbat/internal/db"
+)
+
+func isNotBlank(val string) error {
+	if len(val) > 0 {
+		return nil
+	}
+
+	return errors.New("value cannot be blank")
+}
+
+func selectedDB(args []string) string {
+	if len(args) > 0 {
+		return args[0]
+	}
+
+	var name string
+
+	options := []huh.Option[string]{}
+
+	for _, n := range db.UserDBNames() {
+		options = append(options, huh.NewOption[string](n, n))
+	}
+
+	form := huh.NewForm(
+		huh.NewGroup(
+			huh.NewSelect[string]().Title("database").Value(&name).Options(
+				options...,
+			),
+		),
+	)
+
+	err := form.Run()
+
+	if err != nil {
+		panic(err)
+	}
+
+	return name
+}