80 lines
2.3 KiB
Go
80 lines
2.3 KiB
Go
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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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gfile := plugin.NewGeneratedFile(gname, ".")
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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.P("import (")
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gfile.P(`"context"`)
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gfile.P(`"fmt"`)
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gfile.P(`"net/http"`)
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gfile.P(`"reflect"`)
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gfile.P(`"strings"`)
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gfile.P(`chi "github.com/go-chi/chi/v4"`)
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gfile.P(`middleware "github.com/go-chi/chi/v4/middleware"`)
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gfile.P(`micro_api "github.com/unistack-org/micro/v3/api"`)
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gfile.P(")")
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gfile.P()
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gfile.P("type routeKey struct{}")
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gfile.P("func RouteName(ctx context.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 *chi.Mux, h interface{}, eps []*micro_api.Endpoint) error {")
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gfile.P("v := reflect.ValueOf(h)")
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gfile.P("if v.NumMethod() < 1 {")
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gfile.P(`return fmt.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 := strings.Index(ep.Name, ".")`)
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gfile.P("if idx < 1 || len(ep.Name) <= idx {")
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gfile.P(`return fmt.Errorf("invalid api.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 fmt.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(http.ResponseWriter, *http.Request))")
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gfile.P("if !ok {")
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gfile.P(`return fmt.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(middleware.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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