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|
package main
import (
"bytes"
"flag"
"go/ast"
"go/format"
"go/parser"
"go/token"
"os"
"slices"
"strings"
"text/template"
)
func main() {
inputFile := flag.String("i", "", "input file")
outputFile := flag.String("o", "", "output file")
flag.Parse()
if inputFile == nil || *inputFile == "" || outputFile == nil || *outputFile == "" {
flag.PrintDefaults()
os.Exit(1)
}
// Parse the input file
fileSet := token.NewFileSet()
parsedFile, err := parser.ParseFile(fileSet, *inputFile, nil, parser.SkipObjectResolution)
if err != nil {
panic(err)
}
// Find methods in StrictServerInterface
var methods []string
for _, decl := range parsedFile.Decls {
genDecl, ok := decl.(*ast.GenDecl)
if !ok {
continue
}
for _, spec := range genDecl.Specs {
typeSpec, ok := spec.(*ast.TypeSpec)
if !ok {
continue
}
if typeSpec.Name.Name != "StrictServerInterface" {
continue
}
interfaceType, ok := typeSpec.Type.(*ast.InterfaceType)
if !ok {
continue
}
for _, method := range interfaceType.Methods.List {
if len(method.Names) != 0 {
methods = append(methods, method.Names[0].Name)
}
}
}
}
if len(methods) == 0 {
panic("StrictServerInterface not found")
}
slices.Sort(methods)
type TemplateParameter struct {
Name string
RequiresLogin bool
RequiresAdminRole bool
}
templateParameters := make([]TemplateParameter, len(methods))
for i, method := range methods {
templateParameters[i] = TemplateParameter{
Name: method,
RequiresLogin: method != "PostLogin",
RequiresAdminRole: strings.Contains(method, "Admin"),
}
}
// Generate code.
tmpl, err := template.New("code").Parse(templateText)
if err != nil {
panic(err)
}
var buf bytes.Buffer
err = tmpl.Execute(&buf, templateParameters)
if err != nil {
panic(err)
}
formatted, err := format.Source(buf.Bytes())
if err != nil {
panic(err)
}
err = os.WriteFile(*outputFile, formatted, 0644)
if err != nil {
panic(err)
}
}
const templateText = `// Code generated by go generate; DO NOT EDIT.
package api
import (
"context"
"albatross-2026-backend/config"
"albatross-2026-backend/db"
)
var _ StrictServerInterface = (*HandlerWrapper)(nil)
type HandlerWrapper struct {
impl Handler
}
func NewHandler(queries db.Querier, txm db.TxManager, hub GameHubInterface, auth AuthenticatorInterface, conf *config.Config) *HandlerWrapper {
return &HandlerWrapper{
impl: Handler{
q: queries,
txm: txm,
hub: hub,
auth: auth,
conf: conf,
},
}
}
{{ range . }}
func (h *HandlerWrapper) {{ .Name }}(ctx context.Context, request {{ .Name }}RequestObject) ({{ .Name }}ResponseObject, error) {
{{ if .RequiresLogin -}}
user, ok := GetUserFromContext(ctx)
if !ok {
return {{ .Name }}401JSONResponse{
Message: "Unauthorized",
}, nil
}
{{ if .RequiresAdminRole -}}
if !user.IsAdmin {
return {{ .Name }}403JSONResponse{
Message: "Forbidden",
}, nil
}
{{ end -}}
return h.impl.{{ .Name }}(ctx, request, user)
{{ else -}}
return h.impl.{{ .Name }}(ctx, request)
{{ end -}}
}
{{ end }}
`
|
