fetch provider types (#161)

* feat: upgrade go mod dependencies

* feat: upgrade proton version to the latest

* feat: Add provider_type api

* feat: update provider repository mock

* test: add test cases

Author: bsushmith

Diff for: Makefile

@@ -2,7 +2,7 @@ NAME="github.com/odpf/guardian"
 LAST_COMMIT := $(shell git rev-parse --short HEAD)
 LAST_TAG := "$(shell git rev-list --tags --max-count=1)"
 APP_VERSION := "$(shell git describe --tags ${LAST_TAG})-next"
-PROTON_COMMIT := "bb41ca0a800f039208f21730ab9e78b49bf08aa7"
+PROTON_COMMIT := "3c386084a80432de6de1ed121eed2fd4967a8df4"
 
 .PHONY: all build test clean dist vet proto install
 

Diff for: api/handler/v1beta1/adapter.go

@@ -144,6 +144,13 @@ func (a *adapter) ToProviderConfigProto(pc *domain.ProviderConfig) (*guardianv1b
 	}, nil
 }
 
+func (a *adapter) ToProviderTypeProto(pt domain.ProviderType) (*guardianv1beta1.ProviderType, error) {
+	return &guardianv1beta1.ProviderType{
+		Name:          pt.Name,
+		ResourceTypes: pt.ResourceTypes,
+	}, nil
+}
+
 func (a *adapter) ToRole(role *domain.Role) (*guardianv1beta1.Role, error) {
 	permissions := []*structpb.Value{}
 	for _, p := range role.Permissions {

Diff for: api/handler/v1beta1/grpc.go

@@ -24,6 +24,7 @@ type ProtoAdapter interface {
 	FromProviderConfigProto(*guardianv1beta1.ProviderConfig) (*domain.ProviderConfig, error)
 	ToProviderProto(*domain.Provider) (*guardianv1beta1.Provider, error)
 	ToProviderConfigProto(*domain.ProviderConfig) (*guardianv1beta1.ProviderConfig, error)
+	ToProviderTypeProto(domain.ProviderType) (*guardianv1beta1.ProviderType, error)
 	ToRole(*domain.Role) (*guardianv1beta1.Role, error)
 
 	FromPolicyProto(*guardianv1beta1.Policy) (*domain.Policy, error)
@@ -113,6 +114,26 @@ func (s *GRPCServer) GetProvider(ctx context.Context, req *guardianv1beta1.GetPr
 	}, nil
 }
 
+func (s *GRPCServer) GetProviderTypes(ctx context.Context, req *guardianv1beta1.GetProviderTypesRequest) (*guardianv1beta1.GetProviderTypesResponse, error) {
+	providerTypes, err := s.providerService.GetTypes()
+	if err != nil {
+		return nil, status.Errorf(codes.Internal, "failed to retrieve provider types: %v", err)
+	}
+
+	var providerTypeProtos []*guardianv1beta1.ProviderType
+	for _, pt := range providerTypes {
+		providerTypeProto, err := s.adapter.ToProviderTypeProto(pt)
+		if err != nil {
+			return nil, status.Errorf(codes.Internal, "failed to parse provider type %s: %v", pt.Name, err)
+		}
+		providerTypeProtos = append(providerTypeProtos, providerTypeProto)
+	}
+
+	return &guardianv1beta1.GetProviderTypesResponse{
+		ProviderTypes: providerTypeProtos,
+	}, nil
+}
+
 func (s *GRPCServer) CreateProvider(ctx context.Context, req *guardianv1beta1.CreateProviderRequest) (*guardianv1beta1.CreateProviderResponse, error) {
 	providerConfig, err := s.adapter.FromProviderConfigProto(req.GetConfig())
 	if err != nil {