Function generateConvertFileForPath

codegen/service/convert.go:152–333

generateConvertFileForPath generates a single convert.go file for the given path containing the specified conversions and creations

(
	convertPath string,
	conversions []*expr.TypeMap,
	creations []*expr.TypeMap,
	service *expr.ServiceExpr,
	svc *Data,
)

// generateConvertFileForPath generates a single convert.go file for the given path
// containing the specified conversions and creations
func generateConvertFileForPath(
	convertPath string,
	conversions []*expr.TypeMap,
	creations []*expr.TypeMap,
	service *expr.ServiceExpr,
	svc *Data,
) (*codegen.File, error) {
	if len(conversions) == 0 && len(creations) == 0 {
		return nil, nil
	}

	// Determine package name from path
	var convertPkgName string
	if len(conversions) > 0 {
		if loc := codegen.UserTypeLocation(conversions[0].User); loc != nil {
			convertPkgName = loc.PackageName()
		} else {
			convertPkgName = svc.PkgName
		}
	} else if len(creations) > 0 {
		if loc := codegen.UserTypeLocation(creations[0].User); loc != nil {
			convertPkgName = loc.PackageName()
		} else {
			convertPkgName = svc.PkgName
		}
	}

	// Retrieve external packages info
	ppm := make(map[string]string)
	for _, c := range conversions {
		pkgImport, alias, err := getExternalTypeInfo(c.External)
		if err != nil {
			return nil, err
		}
		ppm[pkgImport] = alias
	}
	for _, c := range creations {
		pkgImport, alias, err := getExternalTypeInfo(c.External)
		if err != nil {
			return nil, err
		}
		ppm[pkgImport] = alias
	}
	pkgs := make([]*codegen.ImportSpec, 0, len(ppm)+2)
	for pp, alias := range ppm {
		pkgs = append(pkgs, &codegen.ImportSpec{Name: alias, Path: pp})
	}

	// Build header section
	pkgs = append(pkgs, &codegen.ImportSpec{Path: "context"}, codegen.GoaImport(""))
	sections := []*codegen.SectionTemplate{
		codegen.Header(service.Name+" service type conversion functions", convertPkgName, pkgs),
	}

	var (
		names      = map[string]struct{}{}
		transFuncs []*codegen.TransformFunctionData
	)