feat:#36 added new event grpc message

services/Makefile

@@ -10,7 +10,7 @@ build-ical:
 gen:
 	@protoc \
 	  --proto_path=protobuf "protobuf/modules.proto" \
-	  --go_out=common/genproto/modules \
+	  --go_out="common/genproto/modules" \
 	  --go_opt=paths=source_relative \
-	  --go-grpc_out=common/genproto/modules \
+	  --go-grpc_out="common/genproto/modules" \
 	  --go-grpc_opt=paths=source_relative

services/README.md

@@ -0,0 +1,6 @@
+To execute the protobuf gen script, install the protobuf compiler and the python protobuf library. Then run the following command:
+
+```bash
+go install google.golang.org/protobuf/cmd/protoc-gen-go@v1.28
+go install google.golang.org/grpc/cmd/protoc-gen-go-grpc@v1.2
+```

services/common/genproto/modules/modules.pb.go

@@ -305,6 +305,53 @@ func (x *GetModuleRequest) GetUuid() string {
 	return ""
 }
 
+type GetModulesRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Uuids []string `protobuf:"bytes,1,rep,name=uuids,proto3" json:"uuids,omitempty"`
+}
+
+func (x *GetModulesRequest) Reset() {
+	*x = GetModulesRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_modules_proto_msgTypes[3]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *GetModulesRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*GetModulesRequest) ProtoMessage() {}
+
+func (x *GetModulesRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_modules_proto_msgTypes[3]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use GetModulesRequest.ProtoReflect.Descriptor instead.
+func (*GetModulesRequest) Descriptor() ([]byte, []int) {
+	return file_modules_proto_rawDescGZIP(), []int{3}
+}
+
+func (x *GetModulesRequest) GetUuids() []string {
+	if x != nil {
+		return x.Uuids
+	}
+	return nil
+}
+
 type GetModuleResponse struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -316,7 +363,7 @@ type GetModuleResponse struct {
 func (x *GetModuleResponse) Reset() {
 	*x = GetModuleResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_modules_proto_msgTypes[3]
+		mi := &file_modules_proto_msgTypes[4]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -329,7 +376,7 @@ func (x *GetModuleResponse) String() string {
 func (*GetModuleResponse) ProtoMessage() {}
 
 func (x *GetModuleResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_modules_proto_msgTypes[3]
+	mi := &file_modules_proto_msgTypes[4]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -342,7 +389,7 @@ func (x *GetModuleResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use GetModuleResponse.ProtoReflect.Descriptor instead.
 func (*GetModuleResponse) Descriptor() ([]byte, []int) {
-	return file_modules_proto_rawDescGZIP(), []int{3}
+	return file_modules_proto_rawDescGZIP(), []int{4}
 }
 
 func (x *GetModuleResponse) GetModule() *Module {
@@ -352,6 +399,100 @@ func (x *GetModuleResponse) GetModule() *Module {
 	return nil
 }
 
+type GetModulesResponse struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Modules []*Module `protobuf:"bytes,1,rep,name=modules,proto3" json:"modules,omitempty"`
+}
+
+func (x *GetModulesResponse) Reset() {
+	*x = GetModulesResponse{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_modules_proto_msgTypes[5]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *GetModulesResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*GetModulesResponse) ProtoMessage() {}
+
+func (x *GetModulesResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_modules_proto_msgTypes[5]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use GetModulesResponse.ProtoReflect.Descriptor instead.
+func (*GetModulesResponse) Descriptor() ([]byte, []int) {
+	return file_modules_proto_rawDescGZIP(), []int{5}
+}
+
+func (x *GetModulesResponse) GetModules() []*Module {
+	if x != nil {
+		return x.Modules
+	}
+	return nil
+}
+
+type GetEventsResponse struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Events []*Event `protobuf:"bytes,1,rep,name=events,proto3" json:"events,omitempty"`
+}
+
+func (x *GetEventsResponse) Reset() {
+	*x = GetEventsResponse{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_modules_proto_msgTypes[6]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *GetEventsResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*GetEventsResponse) ProtoMessage() {}
+
+func (x *GetEventsResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_modules_proto_msgTypes[6]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use GetEventsResponse.ProtoReflect.Descriptor instead.
+func (*GetEventsResponse) Descriptor() ([]byte, []int) {
+	return file_modules_proto_rawDescGZIP(), []int{6}
+}
+
+func (x *GetEventsResponse) GetEvents() []*Event {
+	if x != nil {
+		return x.Events
+	}
+	return nil
+}
+
 var File_modules_proto protoreflect.FileDescriptor
 
 var file_modules_proto_rawDesc = []byte{
@@ -389,17 +530,34 @@ var file_modules_proto_rawDesc = []byte{
 	0x52, 0x06, 0x65, 0x76, 0x65, 0x6e, 0x74, 0x73, 0x22, 0x26, 0x0a, 0x10, 0x47, 0x65, 0x74, 0x4d,
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+	0x2f, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2f, 0x6d, 0x6f, 0x64, 0x75, 0x6c, 0x65, 0x73, 0x62,
+	0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -414,23 +572,32 @@ func file_modules_proto_rawDescGZIP() []byte {
 	return file_modules_proto_rawDescData
 }
 
-var file_modules_proto_msgTypes = make([]protoimpl.MessageInfo, 4)
+var file_modules_proto_msgTypes = make([]protoimpl.MessageInfo, 7)
 var file_modules_proto_goTypes = []interface{}{
-	(*Event)(nil),             // 0: Event
+	(*Event)(nil),              // 0: Event
-	(*Module)(nil),            // 1: Module
+	(*Module)(nil),             // 1: Module
-	(*GetModuleRequest)(nil),  // 2: GetModuleRequest
+	(*GetModuleRequest)(nil),   // 2: GetModuleRequest
-	(*GetModuleResponse)(nil), // 3: GetModuleResponse
+	(*GetModulesRequest)(nil),  // 3: GetModulesRequest
+	(*GetModuleResponse)(nil),  // 4: GetModuleResponse
+	(*GetModulesResponse)(nil), // 5: GetModulesResponse
+	(*GetEventsResponse)(nil),  // 6: GetEventsResponse
 }
 var file_modules_proto_depIdxs = []int32{
 	0, // 0: Module.events:type_name -> Event
 	1, // 1: GetModuleResponse.module:type_name -> Module
-	2, // 2: ModuleService.GetModule:input_type -> GetModuleRequest
+	1, // 2: GetModulesResponse.modules:type_name -> Module
-	3, // 3: ModuleService.GetModule:output_type -> GetModuleResponse
+	0, // 3: GetEventsResponse.events:type_name -> Event
-	3, // [3:4] is the sub-list for method output_type
+	2, // 4: ModuleService.GetModule:input_type -> GetModuleRequest
-	2, // [2:3] is the sub-list for method input_type
+	3, // 5: ModuleService.GetModules:input_type -> GetModulesRequest
-	2, // [2:2] is the sub-list for extension type_name
+	3, // 6: ModuleService.GetEventsForModules:input_type -> GetModulesRequest
-	2, // [2:2] is the sub-list for extension extendee
+	4, // 7: ModuleService.GetModule:output_type -> GetModuleResponse
-	0, // [0:2] is the sub-list for field type_name
+	5, // 8: ModuleService.GetModules:output_type -> GetModulesResponse
+	6, // 9: ModuleService.GetEventsForModules:output_type -> GetEventsResponse
+	7, // [7:10] is the sub-list for method output_type
+	4, // [4:7] is the sub-list for method input_type
+	4, // [4:4] is the sub-list for extension type_name
+	4, // [4:4] is the sub-list for extension extendee
+	0, // [0:4] is the sub-list for field type_name
 }
 
 func init() { file_modules_proto_init() }
@@ -476,6 +643,18 @@ func file_modules_proto_init() {
 			}
 		}
 		file_modules_proto_msgTypes[3].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*GetModulesRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_modules_proto_msgTypes[4].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*GetModuleResponse); i {
 			case 0:
 				return &v.state
@@ -487,6 +666,30 @@ func file_modules_proto_init() {
 				return nil
 			}
 		}
+		file_modules_proto_msgTypes[5].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*GetModulesResponse); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_modules_proto_msgTypes[6].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*GetEventsResponse); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
 	}
 	type x struct{}
 	out := protoimpl.TypeBuilder{
@@ -494,7 +697,7 @@ func file_modules_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_modules_proto_rawDesc,
 			NumEnums:      0,
-			NumMessages:   4,
+			NumMessages:   7,
 			NumExtensions: 0,
 			NumServices:   1,
 		},

services/common/genproto/modules/modules_grpc.pb.go

@@ -23,6 +23,8 @@ const _ = grpc.SupportPackageIsVersion7
 // For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
 type ModuleServiceClient interface {
 	GetModule(ctx context.Context, in *GetModuleRequest, opts ...grpc.CallOption) (*GetModuleResponse, error)
+	GetModules(ctx context.Context, in *GetModulesRequest, opts ...grpc.CallOption) (*GetModulesResponse, error)
+	GetEventsForModules(ctx context.Context, in *GetModulesRequest, opts ...grpc.CallOption) (*GetEventsResponse, error)
 }
 
 type moduleServiceClient struct {
@@ -42,11 +44,31 @@ func (c *moduleServiceClient) GetModule(ctx context.Context, in *GetModuleReques
 	return out, nil
 }
 
+func (c *moduleServiceClient) GetModules(ctx context.Context, in *GetModulesRequest, opts ...grpc.CallOption) (*GetModulesResponse, error) {
+	out := new(GetModulesResponse)
+	err := c.cc.Invoke(ctx, "/ModuleService/GetModules", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *moduleServiceClient) GetEventsForModules(ctx context.Context, in *GetModulesRequest, opts ...grpc.CallOption) (*GetEventsResponse, error) {
+	out := new(GetEventsResponse)
+	err := c.cc.Invoke(ctx, "/ModuleService/GetEventsForModules", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 // ModuleServiceServer is the server API for ModuleService service.
 // All implementations must embed UnimplementedModuleServiceServer
 // for forward compatibility
 type ModuleServiceServer interface {
 	GetModule(context.Context, *GetModuleRequest) (*GetModuleResponse, error)
+	GetModules(context.Context, *GetModulesRequest) (*GetModulesResponse, error)
+	GetEventsForModules(context.Context, *GetModulesRequest) (*GetEventsResponse, error)
 	mustEmbedUnimplementedModuleServiceServer()
 }
 
@@ -57,6 +79,12 @@ type UnimplementedModuleServiceServer struct {
 func (UnimplementedModuleServiceServer) GetModule(context.Context, *GetModuleRequest) (*GetModuleResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method GetModule not implemented")
 }
+func (UnimplementedModuleServiceServer) GetModules(context.Context, *GetModulesRequest) (*GetModulesResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method GetModules not implemented")
+}
+func (UnimplementedModuleServiceServer) GetEventsForModules(context.Context, *GetModulesRequest) (*GetEventsResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method GetEventsForModules not implemented")
+}
 func (UnimplementedModuleServiceServer) mustEmbedUnimplementedModuleServiceServer() {}
 
 // UnsafeModuleServiceServer may be embedded to opt out of forward compatibility for this service.
@@ -88,6 +116,42 @@ func _ModuleService_GetModule_Handler(srv interface{}, ctx context.Context, dec
 	return interceptor(ctx, in, info, handler)
 }
 
+func _ModuleService_GetModules_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(GetModulesRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ModuleServiceServer).GetModules(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/ModuleService/GetModules",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ModuleServiceServer).GetModules(ctx, req.(*GetModulesRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _ModuleService_GetEventsForModules_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(GetModulesRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ModuleServiceServer).GetEventsForModules(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/ModuleService/GetEventsForModules",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ModuleServiceServer).GetEventsForModules(ctx, req.(*GetModulesRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 // ModuleService_ServiceDesc is the grpc.ServiceDesc for ModuleService service.
 // It's only intended for direct use with grpc.RegisterService,
 // and not to be introspected or modified (even as a copy)
@@ -99,6 +163,14 @@ var ModuleService_ServiceDesc = grpc.ServiceDesc{
 			MethodName: "GetModule",
 			Handler:    _ModuleService_GetModule_Handler,
 		},
+		{
+			MethodName: "GetModules",
+			Handler:    _ModuleService_GetModules_Handler,
+		},
+		{
+			MethodName: "GetEventsForModules",
+			Handler:    _ModuleService_GetEventsForModules_Handler,
+		},
 	},
 	Streams:  []grpc.StreamDesc{},
 	Metadata: "modules.proto",

services/data-manager/service/db/dbEvents.go

@@ -131,25 +131,37 @@ func findEventByDayWeekStartEndNameCourse(event model.Event, course string, dao
 	}
 }
 
-func buildIcalQueryForModules(modules []model.FeedCollection) dbx.Expression {
+func buildIcalQueryForModules(modulesUuid []string) dbx.Expression {
+
+	// check uuids against sql injection
+	// uuids are generated by the system and are not user input
+	// following the pattern of only containing alphanumeric characters and dashes
+
+	for _, moduleUuid := range modulesUuid {
+		if !IsSafeIdentifier(moduleUuid) {
+			slog.Warn("Module UUID is not safe: ", "moduleUuid", moduleUuid)
+			return dbx.HashExp{}
+		}
+
+	}
 
 	// build where conditions for each module
 
 	//first check if modules is empty
-	if len(modules) == 0 {
+	if len(modulesUuid) == 0 {
 		return dbx.HashExp{}
 	}
 
 	//second check if modules has only one element
-	if len(modules) == 1 {
+	if len(modulesUuid) == 1 {
-		return dbx.HashExp{"uuid": modules[0].UUID}
+		return dbx.HashExp{"uuid": modulesUuid[0]}
 	}
 
 	//third check if modules has more than one element
 	var wheres []dbx.Expression
 
-	for _, module := range modules {
+	for _, moduleUuid := range modulesUuid {
-		where := dbx.HashExp{"uuid": module.UUID}
+		where := dbx.HashExp{"uuid": moduleUuid}
 		wheres = append(wheres, where)
 	}
 
@@ -162,18 +174,18 @@ func buildIcalQueryForModules(modules []model.FeedCollection) dbx.Expression {
 
 // GetPlanForModules returns all events for the given modules with the given course
 // used for the ical feed
-func GetPlanForModules(app *pocketbase.PocketBase, modules map[string]model.FeedCollection) (model.Events, error) {
+func GetPlanForModules(app *pocketbase.PocketBase, modules []string) (model.Events, error) {
 
 	var events model.Events
 
-	modulesArray := make([]model.FeedCollection, 0, len(modules))
+	modulesArray := make([]string, 0, len(modules))
 	for _, value := range modules {
 		modulesArray = append(modulesArray, value)
 	}
 
 	// iterate over modules in 100 batch sizes
 	for i := 0; i < len(modules); i += 100 {
-		var moduleBatch []model.FeedCollection
+		var moduleBatch []string
 
 		if i+100 > len(modules) {
 			moduleBatch = modulesArray[i:]

services/data-manager/service/db/dbEvents_test.go

@@ -18,14 +18,13 @@ package db
 
 import (
 	"github.com/pocketbase/dbx"
-	"htwkalender/data-manager/model"
 	"reflect"
 	"testing"
 )
 
 func Test_buildIcalQueryForModules(t *testing.T) {
 	type args struct {
-		modules []model.FeedCollection
+		modules []string
 	}
 	tests := []struct {
 		name string
@@ -34,17 +33,17 @@ func Test_buildIcalQueryForModules(t *testing.T) {
 	}{
 		{
 			name: "empty modules",
-			args: args{modules: []model.FeedCollection{}},
+			args: args{modules: []string{}},
 			want: dbx.HashExp{},
 		},
 		{
 			name: "one module",
-			args: args{modules: []model.FeedCollection{{Name: "test", Course: "test", UUID: "test"}}},
+			args: args{modules: []string{"test"}},
 			want: dbx.HashExp{"uuid": "test"},
 		},
 		{
 			name: "two modules",
-			args: args{modules: []model.FeedCollection{{Name: "test", Course: "test", UUID: "test"}, {Name: "test2", Course: "test2", UUID: "test2"}}},
+			args: args{modules: []string{"test", "test2"}},
 			want: dbx.Or(dbx.HashExp{"uuid": "test"}, dbx.HashExp{"uuid": "test2"}),
 		},
 	}

services/data-manager/service/db/dbFunctions.go

@@ -19,9 +19,26 @@ package db
 import (
 	"github.com/pocketbase/pocketbase"
 	"github.com/pocketbase/pocketbase/models"
+	"log/slog"
+	"regexp"
 )
 
 func FindCollection(app *pocketbase.PocketBase, collectionName string) (*models.Collection, error) {
 	collection, dbError := app.Dao().FindCollectionByNameOrId(collectionName)
 	return collection, dbError
 }
+
+// IsSafeIdentifier check uuids against sql injection
+// uuids are generated by the system and are not user input
+// following the pattern of only containing alphanumeric characters and dashes
+func IsSafeIdentifier(uuid string) bool {
+	// Define a regular expression that matches only valid UUID characters (alphanumeric and dashes)
+	validUUIDPattern := `^[a-zA-Z0-9-]+$`
+	match, err := regexp.MatchString(validUUIDPattern, uuid)
+	if err != nil {
+		// Handle the error according to your application's needs
+		slog.Warn("Invalid UUID pattern", "uuid", uuid)
+		return false
+	}
+	return match
+}

services/data-manager/service/db/dbFunctions_test.go

@@ -0,0 +1,50 @@
+package db
+
+import "testing"
+
+func TestIsSafeIdentifier(t *testing.T) {
+	type args struct {
+		uuid string
+	}
+	tests := []struct {
+		name string
+		args args
+		want bool
+	}{
+		{
+			name: "Test safe identifier",
+			args: args{
+				uuid: "1234567890-1234567890-1234567890-1234567890",
+			},
+			want: true,
+		},
+		{
+			name: "Test safe identifier",
+			args: args{
+				uuid: "1234567890-1234567890-1234567890-1234567890",
+			},
+			want: true,
+		},
+		{
+			name: "Test safe identifier",
+			args: args{
+				uuid: "77eddc32-c49d-5d0a-8c36-17b266396641",
+			},
+			want: true,
+		},
+		{
+			name: "Test unsafe identifier",
+			args: args{
+				uuid: "77eddc32-c49d-5d0a-8c36-17/1!!b266396641-",
+			},
+			want: false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := IsSafeIdentifier(tt.args.uuid); got != tt.want {
+				t.Errorf("IsSafeIdentifier() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}

services/data-manager/service/grpc/mapper.go

@@ -23,3 +23,11 @@ func eventToProto(event *model.Event) *pb.Event {
 		Semester:   event.Semester,
 	}
 }
+
+func eventsToProto(events model.Events) []*pb.Event {
+	protoEvents := make([]*pb.Event, 0)
+	for _, event := range events {
+		protoEvents = append(protoEvents, eventToProto(&event))
+	}
+	return protoEvents
+}

services/data-manager/service/grpc/server.go

@@ -67,3 +67,15 @@ func StartGRPCServer(app *pocketbase.PocketBase) {
 		log.Fatalf("failed to serve: %v", err)
 	}
 }
+
+func (s *ModulesGrpcHandler) GetEventsForModules(ctx context.Context, in *pb.GetModulesRequest) (*pb.GetEventsResponse, error) {
+
+	events, err := db.GetPlanForModules(s.app, in.Uuids)
+	if err != nil {
+		return nil, err
+	}
+
+	return &pb.GetEventsResponse{
+		Events: eventsToProto(events),
+	}, nil
+}

services/ical/service/connector/grpc/events.go

@@ -0,0 +1,34 @@
+package grpc
+
+import (
+	"context"
+	"google.golang.org/grpc"
+	pb "htwkalender/common/genproto/modules"
+	"htwkalender/ical/model"
+	"log/slog"
+	"time"
+)
+
+func GetEvents(modules []model.FeedModule, conn *grpc.ClientConn) (model.Events, error) {
+	c := pb.NewModuleServiceClient(conn)
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second)
+	defer cancel()
+
+	// List of uuids
+	uuids := make([]string, 0)
+	for _, module := range modules {
+		uuids = append(uuids, module.UUID)
+	}
+
+	r, err := c.GetEventsForModules(ctx, &pb.GetModulesRequest{Uuids: uuids})
+	if err != nil {
+		slog.Error("could not get modules: %v", "error", err)
+	}
+
+	events := make(model.Events, 0)
+	for _, event := range r.GetEvents() {
+		events = append(events, protoToEvent(event))
+	}
+
+	return events, nil
+}

services/ical/service/connector/grpc/modules.go

@@ -33,6 +33,42 @@ func GetModuleWithEvents(module model.FeedModule, conn *grpc.ClientConn) (model.
 	}, nil
 }
 
+func GetModulesWithEvents(modules []model.FeedModule, conn *grpc.ClientConn) ([]model.Module, error) {
+	c := pb.NewModuleServiceClient(conn)
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second)
+	defer cancel()
+
+	// List of uuids
+	uuids := make([]string, 0)
+	for _, module := range modules {
+		uuids = append(uuids, module.UUID)
+	}
+
+	r, err := c.GetModules(ctx, &pb.GetModulesRequest{Uuids: uuids})
+	if err != nil {
+		slog.Error("could not get modules: %v", "error", err)
+	}
+
+	moduleList := make([]model.Module, 0)
+	for _, module := range r.GetModules() {
+		events := make([]model.Event, 0)
+		for _, event := range module.Events {
+			events = append(events, protoToEvent(event))
+		}
+
+		moduleList = append(moduleList, model.Module{
+			UUID:     module.Uuid,
+			Name:     module.Name,
+			Prof:     module.Prof,
+			Course:   module.Course,
+			Semester: module.Semester,
+			Events:   events,
+		})
+	}
+
+	return moduleList, nil
+}
+
 func protoToEvent(event *pb.Event) model.Event {
 
 	return model.Event{

services/ical/service/ical/ical.go

@@ -21,13 +21,10 @@ func Feed(app model.AppType, token string) (string, error) {
 
 	var events model.Events
 
-	for _, module := range feed.Modules {
+	// Get all events for modules
-		moduleWithEvents, err := htwkalenderGrpc.GetModuleWithEvents(module, app.GrpcClient)
+	events, err = htwkalenderGrpc.GetEvents(feed.Modules, app.GrpcClient)
-		if err != nil {
+	if err != nil {
-			return "", err
+		return "", err
-		}
-
-		events = append(events, moduleWithEvents.Events...)
 	}
 
 	// Sort events by start date

services/protobuf/modules.proto

@@ -4,6 +4,8 @@ option go_package = "htwkalender/common/modules";
 
 service ModuleService {
   rpc GetModule(GetModuleRequest) returns (GetModuleResponse) {}
+  rpc GetModules(GetModulesRequest) returns (GetModulesResponse) {}
+  rpc GetEventsForModules(GetModulesRequest) returns (GetEventsResponse) {}
 }
 
 message Event {
@@ -36,6 +38,18 @@ message GetModuleRequest {
   string uuid = 1;
 }
 
+message GetModulesRequest {
+  repeated string uuids = 1;
+}
+
 message GetModuleResponse {
   Module module = 1;
 }
+
+message GetModulesResponse {
+  repeated Module modules = 1;
+}
+
+message GetEventsResponse {
+  repeated Event events = 1;
+}