package backup

// definitionAdmitter is the R-971 question a restore asks BEFORE it stops the app: would the unit's (or the snapshot's)
// compose, rendered with the restore's env, pass the box's catalog allow-list? Implemented by main.go's stackAdapter;
// a provider without it (the test fakes) asks nothing. A refusal leaves the live app running and untouched.
type definitionAdmitter interface {
	AdmitDefinitionFromUnit(name, composeSrcDir string, fullEnv map[string]string) error
}

// admitRestoredDefinition asks the provider when it can answer; nil when it cannot.
func (m *Manager) admitRestoredDefinition(name, composeSrcDir string, env map[string]string) error {
	if a, ok := m.stackProvider.(definitionAdmitter); ok {
		return a.AdmitDefinitionFromUnit(name, composeSrcDir, env)
	}
	return nil
}