memos/api/v2/memo_service.go

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package v2
import (
"context"
"github.com/google/cel-go/cel"
"github.com/pkg/errors"
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v1alpha1 "google.golang.org/genproto/googleapis/api/expr/v1alpha1"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
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apiv2pb "github.com/usememos/memos/proto/gen/api/v2"
"github.com/usememos/memos/store"
)
type MemoService struct {
apiv2pb.UnimplementedMemoServiceServer
Store *store.Store
}
// NewMemoService creates a new MemoService.
func NewMemoService(store *store.Store) *MemoService {
return &MemoService{
Store: store,
}
}
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func (s *MemoService) CreateMemo(ctx context.Context, request *apiv2pb.CreateMemoRequest) (*apiv2pb.CreateMemoResponse, error) {
user, err := getCurrentUser(ctx, s.Store)
if err != nil {
return nil, status.Errorf(codes.Internal, "failed to get user")
}
if user == nil {
return nil, status.Errorf(codes.PermissionDenied, "permission denied")
}
create := &store.Memo{
CreatorID: user.ID,
Content: request.Content,
Visibility: store.Visibility(request.Visibility),
}
memo, err := s.Store.CreateMemo(ctx, create)
if err != nil {
return nil, err
}
response := &apiv2pb.CreateMemoResponse{
Memo: convertMemoFromStore(memo),
}
return response, nil
}
func (s *MemoService) ListMemos(ctx context.Context, request *apiv2pb.ListMemosRequest) (*apiv2pb.ListMemosResponse, error) {
memoFind := &store.FindMemo{}
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if request.Filter != "" {
filter, err := parseListMemosFilter(request.Filter)
if err != nil {
return nil, status.Errorf(codes.InvalidArgument, "invalid filter: %v", err)
}
if filter.Visibility != nil {
memoFind.VisibilityList = []store.Visibility{*filter.Visibility}
}
if filter.CreatedTsBefore != nil {
memoFind.CreatedTsBefore = filter.CreatedTsBefore
}
if filter.CreatedTsAfter != nil {
memoFind.CreatedTsAfter = filter.CreatedTsAfter
}
}
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user, _ := getCurrentUser(ctx, s.Store)
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// If the user is not authenticated, only public memos are visible.
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if user == nil {
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memoFind.VisibilityList = []store.Visibility{store.Public}
}
if request.PageSize != 0 {
offset := int(request.Page * request.PageSize)
limit := int(request.PageSize)
memoFind.Offset = &offset
memoFind.Limit = &limit
}
memos, err := s.Store.ListMemos(ctx, memoFind)
if err != nil {
return nil, err
}
memoMessages := make([]*apiv2pb.Memo, len(memos))
for i, memo := range memos {
memoMessages[i] = convertMemoFromStore(memo)
}
response := &apiv2pb.ListMemosResponse{
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Memos: memoMessages,
}
return response, nil
}
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func (s *MemoService) GetMemo(ctx context.Context, request *apiv2pb.GetMemoRequest) (*apiv2pb.GetMemoResponse, error) {
memo, err := s.Store.GetMemo(ctx, &store.FindMemo{
ID: &request.Id,
})
if err != nil {
return nil, err
}
if memo == nil {
return nil, status.Errorf(codes.NotFound, "memo not found")
}
if memo.Visibility != store.Public {
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user, err := getCurrentUser(ctx, s.Store)
if err != nil {
return nil, status.Errorf(codes.Internal, "failed to get user")
}
if user == nil {
return nil, status.Errorf(codes.PermissionDenied, "permission denied")
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}
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if memo.Visibility == store.Private && memo.CreatorID != user.ID {
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return nil, status.Errorf(codes.PermissionDenied, "permission denied")
}
}
response := &apiv2pb.GetMemoResponse{
Memo: convertMemoFromStore(memo),
}
return response, nil
}
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func (s *MemoService) CreateMemoComment(ctx context.Context, request *apiv2pb.CreateMemoCommentRequest) (*apiv2pb.CreateMemoCommentResponse, error) {
// Create the comment memo first.
createMemoResponse, err := s.CreateMemo(ctx, request.Create)
if err != nil {
return nil, status.Errorf(codes.Internal, "failed to create memo")
}
// Build the relation between the comment memo and the original memo.
memo := createMemoResponse.Memo
_, err = s.Store.UpsertMemoRelation(ctx, &store.MemoRelation{
MemoID: memo.Id,
RelatedMemoID: request.Id,
Type: store.MemoRelationComment,
})
if err != nil {
return nil, status.Errorf(codes.Internal, "failed to create memo relation")
}
response := &apiv2pb.CreateMemoCommentResponse{
Memo: memo,
}
return response, nil
}
func (s *MemoService) ListMemoComments(ctx context.Context, request *apiv2pb.ListMemoCommentsRequest) (*apiv2pb.ListMemoCommentsResponse, error) {
memoRelationComment := store.MemoRelationComment
memoRelations, err := s.Store.ListMemoRelations(ctx, &store.FindMemoRelation{
RelatedMemoID: &request.Id,
Type: &memoRelationComment,
})
if err != nil {
return nil, status.Errorf(codes.Internal, "failed to list memo relations")
}
var memos []*apiv2pb.Memo
for _, memoRelation := range memoRelations {
memo, err := s.Store.GetMemo(ctx, &store.FindMemo{
ID: &memoRelation.MemoID,
})
if err != nil {
return nil, status.Errorf(codes.Internal, "failed to get memo")
}
if memo != nil {
memos = append(memos, convertMemoFromStore(memo))
}
}
response := &apiv2pb.ListMemoCommentsResponse{
Memos: memos,
}
return response, nil
}
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// ListMemosFilterCELAttributes are the CEL attributes for ListMemosFilter.
var ListMemosFilterCELAttributes = []cel.EnvOption{
cel.Variable("visibility", cel.StringType),
cel.Variable("created_ts_before", cel.IntType),
cel.Variable("created_ts_after", cel.IntType),
}
type ListMemosFilter struct {
Visibility *store.Visibility
CreatedTsBefore *int64
CreatedTsAfter *int64
}
func parseListMemosFilter(expression string) (*ListMemosFilter, error) {
e, err := cel.NewEnv(ListMemosFilterCELAttributes...)
if err != nil {
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return nil, err
}
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ast, issues := e.Compile(expression)
if issues != nil {
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return nil, errors.Errorf("found issue %v", issues)
}
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filter := &ListMemosFilter{}
expr, err := cel.AstToParsedExpr(ast)
if err != nil {
return nil, err
}
callExpr := expr.GetExpr().GetCallExpr()
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findField(callExpr, filter)
return filter, nil
}
func findField(callExpr *v1alpha1.Expr_Call, filter *ListMemosFilter) {
if len(callExpr.Args) == 2 {
idExpr := callExpr.Args[0].GetIdentExpr()
if idExpr != nil {
if idExpr.Name == "visibility" {
visibility := store.Visibility(callExpr.Args[1].GetConstExpr().GetStringValue())
filter.Visibility = &visibility
}
if idExpr.Name == "created_ts_before" {
createdTsBefore := callExpr.Args[1].GetConstExpr().GetInt64Value()
filter.CreatedTsBefore = &createdTsBefore
}
if idExpr.Name == "created_ts_after" {
createdTsAfter := callExpr.Args[1].GetConstExpr().GetInt64Value()
filter.CreatedTsAfter = &createdTsAfter
}
return
}
}
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for _, arg := range callExpr.Args {
callExpr := arg.GetCallExpr()
if callExpr != nil {
findField(callExpr, filter)
}
}
}
func convertMemoFromStore(memo *store.Memo) *apiv2pb.Memo {
return &apiv2pb.Memo{
Id: int32(memo.ID),
RowStatus: convertRowStatusFromStore(memo.RowStatus),
CreatedTs: memo.CreatedTs,
UpdatedTs: memo.UpdatedTs,
CreatorId: int32(memo.CreatorID),
Content: memo.Content,
Visibility: convertVisibilityFromStore(memo.Visibility),
Pinned: memo.Pinned,
}
}
func convertVisibilityFromStore(visibility store.Visibility) apiv2pb.Visibility {
switch visibility {
case store.Private:
return apiv2pb.Visibility_PRIVATE
case store.Protected:
return apiv2pb.Visibility_PROTECTED
case store.Public:
return apiv2pb.Visibility_PUBLIC
default:
return apiv2pb.Visibility_VISIBILITY_UNSPECIFIED
}
}