Expose import defaults and selection evidence

internal/engine/records.go

@@ -207,6 +207,90 @@ type importSelectionEvidence struct {
 	outcome  importSelectionOutcome
 }
 
+// ImportSelectionForFacade is a root-converted source-selection transport
+// record. Its paths and enum spellings are converted by the facade.
+type ImportSelectionForFacade struct {
+	Path     Path     // source-local import declaration path
+	Location Location // authored location and declaring source ID
+	Selector string   // path, dir, or glob
+	Outcome  string   // none for a completed empty optional selection
+}
+
+// SourceInfoImportSelectionsForFacade returns detached selection records for
+// explicit root-owned conversion.
+func SourceInfoImportSelectionsForFacade(source SourceInfo) []ImportSelectionForFacade {
+	if source.importSelections == nil {
+		return nil
+	}
+	result := make([]ImportSelectionForFacade, len(source.importSelections))
+	for index, selection := range source.importSelections {
+		result[index] = ImportSelectionForFacade{
+			Path: selection.path.clone(), Location: selection.location,
+			Selector: importSelectorString(selection.selector),
+			Outcome:  importSelectionOutcomeString(selection.outcome),
+		}
+	}
+	return result
+}
+
+// SourceInfoWithImportSelections copies converted root-owned records into
+// private engine source evidence.
+func SourceInfoWithImportSelections(source SourceInfo, selections []ImportSelectionForFacade) SourceInfo {
+	if selections == nil {
+		source.importSelections = nil
+		return source
+	}
+	source.importSelections = make([]importSelectionEvidence, len(selections))
+	for index, selection := range selections {
+		source.importSelections[index] = importSelectionEvidence{
+			path: selection.Path.clone(), location: selection.Location,
+			selector: importSelectorFromString(selection.Selector),
+			outcome:  importSelectionOutcomeFromString(selection.Outcome),
+		}
+	}
+	return source
+}
+
+func importSelectorString(value importSelector) string {
+	switch value {
+	case importSelectorPath:
+		return "path"
+	case importSelectorDirectory:
+		return "dir"
+	case importSelectorGlob:
+		return "glob"
+	default:
+		return ""
+	}
+}
+
+func importSelectorFromString(value string) importSelector {
+	switch value {
+	case "path":
+		return importSelectorPath
+	case "dir":
+		return importSelectorDirectory
+	case "glob":
+		return importSelectorGlob
+	default:
+		return 0
+	}
+}
+
+func importSelectionOutcomeString(value importSelectionOutcome) string {
+	if value == importSelectionNone {
+		return "none"
+	}
+	return ""
+}
+
+func importSelectionOutcomeFromString(value string) importSelectionOutcome {
+	if value == "none" {
+		return importSelectionNone
+	}
+	return 0
+}
+
 // SourceInfoPlacementModeForFacade converts private placement evidence to its
 // root-owned numeric representation.
 func SourceInfoPlacementModeForFacade(source SourceInfo) uint8 {