feat: add http as smtp provider (#8545)

# Which Problems Are Solved

Send Email messages as a HTTP call to a relay, for own logic on handling
different Email providers

# How the Problems Are Solved

Create endpoints under Email provider to manage SMTP and HTTP in the
notification handlers.

# Additional Changes

Clean up old logic in command and query side to handle the general Email
providers with deactivate, activate and remove.

# Additional Context

Partially closes #8270

---------

Co-authored-by: Livio Spring <livio.a@gmail.com>

internal/api/grpc/admin/email.go

@@ -0,0 +1,140 @@
+package admin
+
+import (
+	"context"
+
+	"github.com/zitadel/zitadel/internal/api/authz"
+	"github.com/zitadel/zitadel/internal/api/grpc/object"
+	admin_pb "github.com/zitadel/zitadel/pkg/grpc/admin"
+)
+
+func (s *Server) GetEmailProvider(ctx context.Context, req *admin_pb.GetEmailProviderRequest) (*admin_pb.GetEmailProviderResponse, error) {
+	smtp, err := s.query.SMTPConfigActive(ctx, authz.GetInstance(ctx).InstanceID())
+	if err != nil {
+		return nil, err
+	}
+	return &admin_pb.GetEmailProviderResponse{
+		Config: emailProviderToProviderPb(smtp),
+	}, nil
+}
+
+func (s *Server) GetEmailProviderById(ctx context.Context, req *admin_pb.GetEmailProviderByIdRequest) (*admin_pb.GetEmailProviderByIdResponse, error) {
+	smtp, err := s.query.SMTPConfigByID(ctx, authz.GetInstance(ctx).InstanceID(), req.Id)
+	if err != nil {
+		return nil, err
+	}
+	return &admin_pb.GetEmailProviderByIdResponse{
+		Config: emailProviderToProviderPb(smtp),
+	}, nil
+}
+
+func (s *Server) AddEmailProviderSMTP(ctx context.Context, req *admin_pb.AddEmailProviderSMTPRequest) (*admin_pb.AddEmailProviderSMTPResponse, error) {
+	config := addEmailProviderSMTPToConfig(ctx, req)
+	if err := s.command.AddSMTPConfig(ctx, config); err != nil {
+		return nil, err
+	}
+	return &admin_pb.AddEmailProviderSMTPResponse{
+		Details: object.DomainToChangeDetailsPb(config.Details),
+		Id:      config.ID,
+	}, nil
+}
+
+func (s *Server) UpdateEmailProviderSMTP(ctx context.Context, req *admin_pb.UpdateEmailProviderSMTPRequest) (*admin_pb.UpdateEmailProviderSMTPResponse, error) {
+	config := updateEmailProviderSMTPToConfig(ctx, req)
+	if err := s.command.ChangeSMTPConfig(ctx, config); err != nil {
+		return nil, err
+	}
+	return &admin_pb.UpdateEmailProviderSMTPResponse{
+		Details: object.DomainToChangeDetailsPb(config.Details),
+	}, nil
+}
+
+func (s *Server) AddEmailProviderHTTP(ctx context.Context, req *admin_pb.AddEmailProviderHTTPRequest) (*admin_pb.AddEmailProviderHTTPResponse, error) {
+	config := addEmailProviderHTTPToConfig(ctx, req)
+	if err := s.command.AddSMTPConfigHTTP(ctx, config); err != nil {
+		return nil, err
+	}
+	return &admin_pb.AddEmailProviderHTTPResponse{
+		Details: object.DomainToChangeDetailsPb(config.Details),
+		Id:      config.ID,
+	}, nil
+}
+
+func (s *Server) UpdateEmailProviderHTTP(ctx context.Context, req *admin_pb.UpdateEmailProviderHTTPRequest) (*admin_pb.UpdateEmailProviderHTTPResponse, error) {
+	config := updateEmailProviderHTTPToConfig(ctx, req)
+	if err := s.command.ChangeSMTPConfigHTTP(ctx, config); err != nil {
+		return nil, err
+	}
+	return &admin_pb.UpdateEmailProviderHTTPResponse{
+		Details: object.DomainToChangeDetailsPb(config.Details),
+	}, nil
+}
+
+func (s *Server) RemoveEmailProvider(ctx context.Context, req *admin_pb.RemoveEmailProviderRequest) (*admin_pb.RemoveEmailProviderResponse, error) {
+	details, err := s.command.RemoveSMTPConfig(ctx, authz.GetInstance(ctx).InstanceID(), req.Id)
+	if err != nil {
+		return nil, err
+	}
+	return &admin_pb.RemoveEmailProviderResponse{
+		Details: object.DomainToChangeDetailsPb(details),
+	}, nil
+}
+
+func (s *Server) UpdateEmailProviderSMTPPassword(ctx context.Context, req *admin_pb.UpdateEmailProviderSMTPPasswordRequest) (*admin_pb.UpdateEmailProviderSMTPPasswordResponse, error) {
+	details, err := s.command.ChangeSMTPConfigPassword(ctx, authz.GetInstance(ctx).InstanceID(), req.Id, req.Password)
+	if err != nil {
+		return nil, err
+	}
+	return &admin_pb.UpdateEmailProviderSMTPPasswordResponse{
+		Details: object.DomainToChangeDetailsPb(details),
+	}, nil
+}
+
+func (s *Server) ListEmailProviders(ctx context.Context, req *admin_pb.ListEmailProvidersRequest) (*admin_pb.ListEmailProvidersResponse, error) {
+	queries, err := listEmailProvidersToModel(req)
+	if err != nil {
+		return nil, err
+	}
+	result, err := s.query.SearchSMTPConfigs(ctx, queries)
+	if err != nil {
+		return nil, err
+	}
+	return &admin_pb.ListEmailProvidersResponse{
+		Details: object.ToListDetails(result.Count, result.Sequence, result.LastRun),
+		Result:  emailProvidersToPb(result.Configs),
+	}, nil
+}
+
+func (s *Server) ActivateEmailProvider(ctx context.Context, req *admin_pb.ActivateEmailProviderRequest) (*admin_pb.ActivateEmailProviderResponse, error) {
+	result, err := s.command.ActivateSMTPConfig(ctx, authz.GetInstance(ctx).InstanceID(), req.Id)
+	if err != nil {
+		return nil, err
+	}
+	return &admin_pb.ActivateEmailProviderResponse{
+		Details: object.DomainToAddDetailsPb(result),
+	}, nil
+}
+
+func (s *Server) DeactivateEmailProvider(ctx context.Context, req *admin_pb.DeactivateEmailProviderRequest) (*admin_pb.DeactivateEmailProviderResponse, error) {
+	result, err := s.command.DeactivateSMTPConfig(ctx, authz.GetInstance(ctx).InstanceID(), req.Id)
+	if err != nil {
+		return nil, err
+	}
+	return &admin_pb.DeactivateEmailProviderResponse{
+		Details: object.DomainToAddDetailsPb(result),
+	}, nil
+}
+
+func (s *Server) TestEmailProviderById(ctx context.Context, req *admin_pb.TestEmailProviderSMTPByIdRequest) (*admin_pb.TestEmailProviderSMTPByIdResponse, error) {
+	if err := s.command.TestSMTPConfigById(ctx, authz.GetInstance(ctx).InstanceID(), req.Id, req.ReceiverAddress); err != nil {
+		return nil, err
+	}
+	return &admin_pb.TestEmailProviderSMTPByIdResponse{}, nil
+}
+
+func (s *Server) TestEmailProviderSMTP(ctx context.Context, req *admin_pb.TestEmailProviderSMTPRequest) (*admin_pb.TestEmailProviderSMTPResponse, error) {
+	if err := s.command.TestSMTPConfig(ctx, authz.GetInstance(ctx).InstanceID(), req.Id, req.ReceiverAddress, testEmailProviderSMTPToConfig(req)); err != nil {
+		return nil, err
+	}
+	return &admin_pb.TestEmailProviderSMTPResponse{}, nil
+}