Add nda signature middleware

Signed-off-by: Émile Ré <emile@getprobo.com>

pkg/esign/errors.go

@@ -0,0 +1,21 @@
+// Copyright (c) 2025 Probo Inc <hello@getprobo.com>.
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+package esign
+
+import "errors"
+
+var (
+	ErrElectronicSignatureNotFound = errors.New("electronic signature not found")
+)

pkg/esign/service.go

@@ -17,6 +17,7 @@ package esign
 import (
 	"bytes"
 	"context"
+	"errors"
 	"fmt"
 	"strings"
 	"time"
@@ -338,6 +339,10 @@ func (s *Service) GetSignatureByID(ctx context.Context, id gid.GID) (*coredata.E
 		ctx,
 		func(conn pg.Conn) error {
 			if err := signature.LoadByID(ctx, conn, scope, id); err != nil {
+				if errors.Is(err, coredata.ErrResourceNotFound) {
+					return ErrElectronicSignatureNotFound
+				}
+
 				return fmt.Errorf("cannot load electronic signature: %w", err)
 			}
 

pkg/server/api/compliancepage/nda_middleware.go

@@ -0,0 +1,102 @@
+// Copyright (c) 2025 Probo Inc <hello@getprobo.com>.
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+package compliancepage
+
+import (
+	"errors"
+	"net/http"
+
+	"github.com/99designs/gqlgen/graphql"
+	"github.com/vektah/gqlparser/v2/gqlerror"
+	"go.gearno.de/kit/httpserver"
+	"go.gearno.de/kit/log"
+	"go.probo.inc/probo/pkg/coredata"
+	"go.probo.inc/probo/pkg/esign"
+	"go.probo.inc/probo/pkg/server/gqlutils"
+	"go.probo.inc/probo/pkg/trust"
+)
+
+func NewNDAMiddleware(trustSvc *trust.Service, esignSvc *esign.Service, logger *log.Logger) func(next http.Handler) http.Handler {
+	return func(next http.Handler) http.Handler {
+		return http.HandlerFunc(
+			func(w http.ResponseWriter, r *http.Request) {
+				ctx := r.Context()
+
+				membership := ComplianceMembershipFromContext(ctx)
+
+				if membership == nil {
+					next.ServeHTTP(w, r)
+					return
+				}
+
+				compliancePage := CompliancePageFromContext(ctx)
+
+				if _, err := trustSvc.GetNDAFile(ctx, compliancePage.ID); err != nil {
+					if errors.Is(err, trust.ErrNDAFileNotFound) {
+						next.ServeHTTP(w, r)
+						return
+					}
+
+					logger.ErrorCtx(ctx, "cannot get NDA file", log.Error(err))
+					httpserver.RenderJSON(
+						w,
+						http.StatusInternalServerError,
+						&graphql.Response{
+							Errors: gqlerror.List{
+								gqlutils.Internal(ctx),
+							},
+						},
+					)
+					return
+				}
+
+				if membership.ElectronicSignatureID == nil {
+					next.ServeHTTP(w, r)
+					return
+				}
+
+				sig, err := esignSvc.GetSignatureByID(ctx, *membership.ElectronicSignatureID)
+				if err != nil {
+					logger.ErrorCtx(ctx, "cannot get NDA signature", log.Error(err))
+					httpserver.RenderJSON(
+						w,
+						http.StatusInternalServerError,
+						&graphql.Response{
+							Errors: gqlerror.List{
+								gqlutils.Internal(ctx),
+							},
+						},
+					)
+					return
+				}
+
+				if sig.Status != coredata.ElectronicSignatureStatusCompleted {
+					httpserver.RenderJSON(
+						w,
+						http.StatusForbidden,
+						&graphql.Response{
+							Errors: gqlerror.List{
+								gqlutils.NDASignatureRequiredf(ctx, "NDA signature required"),
+							},
+						},
+					)
+					return
+				}
+
+				next.ServeHTTP(w, r)
+			},
+		)
+	}
+}

pkg/server/api/trust/v1/resolver.go

@@ -88,6 +88,7 @@ func NewMux(
 	r.Use(compliancepage.NewCompliancePagePresenceMiddleware())
 	r.Use(authn.NewSessionMiddleware(iamSvc, cookieConfig))
 	r.Use(compliancepage.NewMembershipMiddleware(trustSvc, logger))
+	r.Use(compliancepage.NewNDAMiddleware(trustSvc, esignSvc, logger))
 
 	graphqlHandler := NewGraphQLHandler(iamSvc, trustSvc, esignSvc, logger, baseURL, cookieConfig)
 

pkg/server/api/trust/v1/v1_resolver.go

@@ -289,10 +289,6 @@ func (r *mutationResolver) ExportDocumentPDF(ctx context.Context, input types.Ex
 		return nil, gqlutils.Forbiddenf(ctx, "access denied: no permission to access this document")
 	}
 
-	if err := r.checkNDASignature(ctx, trustCenter, identity); err != nil {
-		return nil, err
-	}
-
 	pdf, err := trustService.Documents.ExportPDF(ctx, input.DocumentID, identity.EmailAddress)
 	if err != nil {
 		r.logger.ErrorCtx(ctx, "cannot export document PDF", log.Error(err))
@@ -347,10 +343,6 @@ func (r *mutationResolver) ExportReportPDF(ctx context.Context, input types.Expo
 		return nil, gqlutils.Forbiddenf(ctx, "access denied: no permission to access this report")
 	}
 
-	if err := r.checkNDASignature(ctx, trustCenter, identity); err != nil {
-		return nil, err
-	}
-
 	pdf, err := trustService.Reports.ExportPDF(ctx, input.ReportID, identity.EmailAddress)
 	if err != nil {
 		r.logger.ErrorCtx(ctx, "cannot export report PDF", log.Error(err))
@@ -403,10 +395,6 @@ func (r *mutationResolver) ExportTrustCenterFile(ctx context.Context, input type
 		return nil, gqlutils.Forbiddenf(ctx, "access denied: no permission to access this file")
 	}
 
-	if err := r.checkNDASignature(ctx, trustCenter, identity); err != nil {
-		return nil, err
-	}
-
 	fileData, err := trustService.TrustCenterFiles.ExportFile(ctx, input.TrustCenterFileID, identity.EmailAddress)
 	if err != nil {
 		r.logger.ErrorCtx(ctx, "cannot export trust center file", log.Error(err))

pkg/server/gqlutils/errors.go

@@ -66,6 +66,20 @@ func AssumptionRequiredf(ctx context.Context, format string, a ...any) *gqlerror
 	return AssumptionRequired(ctx, fmt.Errorf(format, a...))
 }
 
+func NDASignatureRequired(ctx context.Context, err error) *gqlerror.Error {
+	return &gqlerror.Error{
+		Message: err.Error(),
+		Path:    graphql.GetPath(ctx),
+		Extensions: map[string]any{
+			"code": "NDA_SIGNATURE_REQUIRED",
+		},
+	}
+}
+
+func NDASignatureRequiredf(ctx context.Context, format string, a ...any) *gqlerror.Error {
+	return NDASignatureRequired(ctx, fmt.Errorf(format, a...))
+}
+
 func Forbidden(ctx context.Context, err error) *gqlerror.Error {
 	return &gqlerror.Error{
 		Message: err.Error(),

pkg/trust/errors.go

@@ -22,4 +22,5 @@ var (
 	ErrMembershipNotFound     = errors.New("membership not found")
 	ErrMembershipInactive     = errors.New("membership inactive")
 	ErrDocumentAccessNotFound = errors.New("document access not found")
+	ErrNDAFileNotFound        = errors.New("NDA file not found")
 )

pkg/trust/service.go

@@ -300,3 +300,43 @@ func (s *Service) GetMembershipByCompliancePageIDAndEmail(ctx context.Context, c
 
 	return membership, nil
 }
+
+func (s *Service) GetNDAFile(
+	ctx context.Context,
+	compliancePageID gid.GID,
+) (*coredata.File, error) {
+	var (
+		file  *coredata.File
+		scope = coredata.NewScopeFromObjectID(compliancePageID)
+	)
+
+	err := s.pg.WithConn(
+		ctx,
+		func(conn pg.Conn) error {
+			trustCenter := &coredata.TrustCenter{}
+			if err := trustCenter.LoadByID(ctx, conn, scope, compliancePageID); err != nil {
+				return fmt.Errorf("cannot load trust center: %w", err)
+			}
+
+			if trustCenter.NonDisclosureAgreementFileID == nil {
+				return nil
+			}
+
+			file = &coredata.File{}
+			if err := file.LoadByID(ctx, conn, scope, *trustCenter.NonDisclosureAgreementFileID); err != nil {
+				if errors.Is(err, coredata.ErrResourceNotFound) {
+					return ErrNDAFileNotFound
+				}
+
+				return fmt.Errorf("cannot load file: %w", err)
+			}
+
+			return nil
+		},
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	return file, nil
+}