106 lines
2.0 KiB
Go
106 lines
2.0 KiB
Go
package generator
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import (
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"io"
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"strings"
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"unicode"
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"github.com/dave/jennifer/jen"
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"go.elara.ws/go-lemmy/cmd/gen/extractor"
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)
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type StructGenerator struct {
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w io.Writer
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PkgName string
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}
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func NewStruct(w io.Writer, pkgName string) *StructGenerator {
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return &StructGenerator{w, pkgName}
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}
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func (s *StructGenerator) Generate(items []extractor.Struct) error {
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f := jen.NewFile(s.PkgName)
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f.HeaderComment("Code generated by go.elara.ws/go-lemmy/cmd/gen (struct generator). DO NOT EDIT.")
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for _, item := range items {
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if len(item.UnionNames) > 0 {
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f.Type().Id(item.Name).String()
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f.Const().DefsFunc(func(g *jen.Group) {
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for _, member := range item.UnionNames {
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constName := strings.Replace(item.Name+string(member), " ", "", -1)
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g.Id(constName).Id(item.Name).Op("=").Lit(string(member))
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}
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})
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} else {
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f.Type().Id(item.Name).StructFunc(func(g *jen.Group) {
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for _, field := range item.Fields {
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g.Id(transformFieldName(field.Name)).Id(getType(field)).Tag(map[string]string{
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"json": field.Name,
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"url": field.Name + ",omitempty",
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})
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}
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if strings.HasSuffix(item.Name, "Response") {
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g.Id("LemmyResponse")
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}
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})
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}
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}
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return f.Render(s.w)
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}
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func getType(f extractor.Field) string {
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t := transformType(f.Type)
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if f.IsArray {
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t = "[]" + t
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}
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if f.IsOptional {
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t = "Optional[" + t + "]"
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}
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return t
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}
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func transformType(s string) string {
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switch s {
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case "number":
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return "float64"
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case "boolean":
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return "bool"
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default:
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return s
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}
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}
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func transformFieldName(s string) string {
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s = snakeToCamel(s)
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s = strings.NewReplacer(
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"Id", "ID",
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"Url", "URL",
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"Nsfw", "NSFW",
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"Jwt", "JWT",
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"Crud", "CRUD",
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).Replace(s)
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return s
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}
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func snakeToCamel(s string) string {
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sb := &strings.Builder{}
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capitalizeNext := true
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for _, char := range s {
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if char == '_' {
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capitalizeNext = true
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continue
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}
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if capitalizeNext {
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sb.WriteRune(unicode.ToUpper(char))
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capitalizeNext = false
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} else {
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sb.WriteRune(char)
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}
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}
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return sb.String()
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}
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