package atlas

// PrependGenerated puts live nodes ahead of the authored ones on every stage
// carrying the given `generate` key. Authored nodes are kept, never replaced:
// they are the graceful-degradation path, and a live source that is
// unavailable (no token, no network) must leave the atlas rendering exactly as
// authored. Passing no nodes is therefore a no-op, not an erasure.
func PrependGenerated(a *Atlas, generate string, nodes []Node) {
	if a == nil || len(nodes) == 0 {
		return
	}
	for i := range a.Stages {
		if a.Stages[i].Generate.Has(generate) {
			a.Stages[i].Nodes = append(append([]Node{}, nodes...), a.Stages[i].Nodes...)
		}
	}
}