82 lines
2.6 KiB
Go
82 lines
2.6 KiB
Go
package main
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import (
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"google.golang.org/protobuf/compiler/protogen"
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)
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var (
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chiPackageFiles map[protogen.GoPackageName]struct{}
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)
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func (g *Generator) chiGenerate(component string, plugin *protogen.Plugin) error {
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chiPackageFiles = make(map[protogen.GoPackageName]struct{})
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for _, file := range plugin.Files {
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if !file.Generate {
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continue
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}
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if len(file.Services) == 0 {
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continue
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}
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if _, ok := chiPackageFiles[file.GoPackageName]; ok {
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continue
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}
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chiPackageFiles[file.GoPackageName] = struct{}{}
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gname := "micro" + "_" + component + ".pb.go"
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path := file.GoImportPath
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if g.standalone {
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path = "."
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}
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gfile := plugin.NewGeneratedFile(gname, path)
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gfile.P("// Code generated by protoc-gen-micro")
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gfile.P("package ", file.GoPackageName)
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gfile.P()
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gfile.Import(contextPackage)
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gfile.Import(fmtPackage)
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gfile.Import(httpPackage)
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gfile.Import(reflectPackage)
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gfile.Import(stringsPackage)
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gfile.Import(chiPackage)
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gfile.Import(chiMiddlewarePackage)
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gfile.Import(microApiPackage)
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gfile.P("type routeKey struct{}")
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gfile.P("func RouteName(ctx ", contextPackage.Ident("Context"), ") (string, bool) {")
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gfile.P("value, ok := ctx.Value(routeKey{}).(string)")
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gfile.P("return value, ok")
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gfile.P("}")
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gfile.P()
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gfile.P("func RegisterHandlers(r *", chiPackage.Ident("Mux"), ", h interface{}, eps []*", microApiPackage.Ident("Endpoint"), ") error {")
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gfile.P("v := ", reflectPackage.Ident("ValueOf"), "(h)")
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gfile.P("if v.NumMethod() < 1 {")
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gfile.P(`return `, fmtPackage.Ident("Errorf"), `("handler has no methods: %T", h)`)
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gfile.P("}")
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gfile.P("for _, ep := range eps {")
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gfile.P(`idx := `, stringsPackage.Ident("Index"), `(ep.Name, ".")`)
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gfile.P("if idx < 1 || len(ep.Name) <= idx {")
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gfile.P(`return `, fmtPackage.Ident("Errorf"), `("invalid `, microApiPackage.Ident("Endpoint"), ` name: %s", ep.Name)`)
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gfile.P("}")
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gfile.P("name := ep.Name[idx+1:]")
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gfile.P("m := v.MethodByName(name)")
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gfile.P("if !m.IsValid() || m.IsZero() {")
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gfile.P(`return `, fmtPackage.Ident("Errorf"), `("invalid handler, method %s not found", name)`)
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gfile.P("}")
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gfile.P("rh, ok := m.Interface().(func(", httpPackage.Ident("ResponseWriter"), ", *", httpPackage.Ident("Request"), "))")
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gfile.P("if !ok {")
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gfile.P(`return `, fmtPackage.Ident("Errorf"), `("invalid handler: %#+v", m.Interface())`)
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gfile.P("}")
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gfile.P("for _, method := range ep.Method {")
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gfile.P("r.With(", chiMiddlewarePackage.Ident("WithValue"), "(routeKey{}, ep.Name)).MethodFunc(method, ep.Path[0], rh)")
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gfile.P("}")
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gfile.P("}")
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gfile.P("return nil")
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gfile.P("}")
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}
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return nil
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}
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