Move app packages under internal

internal/clipboard/service.go

@@ -0,0 +1,101 @@
+package clipboard
+
+import (
+	"errors"
+
+	systemclipboard "github.com/atotto/clipboard"
+
+	"git.julianfamily.org/keepassgo/internal/vault"
+)
+
+var ErrUnsupportedTarget = errors.New("unsupported clipboard target")
+var ErrWriteFailed = errors.New("clipboard write failed")
+
+type Target string
+
+const (
+	TargetUsername Target = "username"
+	TargetPassword Target = "password"
+	TargetURL      Target = "url"
+)
+
+type Writer interface {
+	WriteText(text string) error
+}
+
+type Service struct {
+	Writer Writer
+}
+
+func (s Service) Copy(model vault.Model, entryID string, target Target) error {
+	entry, err := findEntry(model, entryID)
+	if err != nil {
+		return err
+	}
+
+	content, err := contentForTarget(entry, target)
+	if err != nil {
+		return err
+	}
+
+	if err := s.writer().WriteText(content); err != nil {
+		return writeError{err: err}
+	}
+
+	return nil
+}
+
+func (s Service) writer() Writer {
+	if s.Writer != nil {
+		return s.Writer
+	}
+	return systemWriter{}
+}
+
+func WriteText(text string) error {
+	return systemWriter{}.WriteText(text)
+}
+
+func findEntry(model vault.Model, entryID string) (vault.Entry, error) {
+	for _, entry := range model.Entries {
+		if entry.ID == entryID {
+			return entry, nil
+		}
+	}
+	return vault.Entry{}, vault.ErrEntryNotFound
+}
+
+func contentForTarget(entry vault.Entry, target Target) (string, error) {
+	switch target {
+	case TargetUsername:
+		return entry.Username, nil
+	case TargetPassword:
+		return entry.Password, nil
+	case TargetURL:
+		return entry.URL, nil
+	default:
+		return "", ErrUnsupportedTarget
+	}
+}
+
+type systemWriter struct{}
+
+func (systemWriter) WriteText(text string) error {
+	return systemclipboard.WriteAll(text)
+}
+
+type writeError struct {
+	err error
+}
+
+func (e writeError) Error() string {
+	return ErrWriteFailed.Error()
+}
+
+func (e writeError) Unwrap() error {
+	return e.err
+}
+
+func (e writeError) Is(target error) bool {
+	return target == ErrWriteFailed
+}