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certificate.go
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certificate.go
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// Copyright 2021 Monoskope Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package aggregates
import (
"context"
"fmt"
"github.com/finleap-connect/monoskope/pkg/api/domain/eventdata"
"github.com/finleap-connect/monoskope/pkg/domain/commands"
"github.com/finleap-connect/monoskope/pkg/domain/constants/aggregates"
"github.com/finleap-connect/monoskope/pkg/domain/constants/events"
"github.com/finleap-connect/monoskope/pkg/domain/errors"
es "github.com/finleap-connect/monoskope/pkg/eventsourcing"
"github.com/google/uuid"
)
// CertificateAggregate is an aggregate for certificates.
type CertificateAggregate struct {
*DomainAggregateBase
aggregateManager es.AggregateStore
referencedAggregateId uuid.UUID
referencedAggregateType es.AggregateType
signingRequest []byte
certificate []byte
caCertBundle []byte
}
// CertificateAggregate creates a new CertificateAggregate
func NewCertificateAggregate(aggregateManager es.AggregateStore) es.Aggregate {
return &CertificateAggregate{
DomainAggregateBase: &DomainAggregateBase{
BaseAggregate: es.NewBaseAggregate(aggregates.Certificate),
},
aggregateManager: aggregateManager,
}
}
// HandleCommand implements the HandleCommand method of the Aggregate interface.
func (a *CertificateAggregate) HandleCommand(ctx context.Context, cmd es.Command) (*es.CommandReply, error) {
switch cmd := cmd.(type) {
case *commands.RequestCertificateCommand:
if a.Exists() {
return nil, errors.ErrCertificateAlreadyExists
}
ed := es.ToEventDataFromProto(&eventdata.CertificateRequested{
ReferencedAggregateId: cmd.GetReferencedAggregateId(),
ReferencedAggregateType: cmd.GetReferencedAggregateType(),
SigningRequest: cmd.GetSigningRequest(),
})
_ = a.AppendEvent(ctx, events.CertificateRequested, ed)
default:
return nil, fmt.Errorf("couldn't handle command of type '%s'", cmd.CommandType())
}
return a.DefaultReply(), nil
}
// ApplyEvent implements the ApplyEvent method of the Aggregate interface.
func (a *CertificateAggregate) ApplyEvent(event es.Event) error {
switch event.EventType() {
case events.CertificateRequested:
data := &eventdata.CertificateRequested{}
err := event.Data().ToProto(data)
if err != nil {
return err
}
id, err := uuid.Parse(data.GetReferencedAggregateId())
if err != nil {
return err
}
a.referencedAggregateId = id
a.referencedAggregateType = es.AggregateType(data.GetReferencedAggregateType())
a.signingRequest = data.GetSigningRequest()
case events.CertificateIssued:
data := &eventdata.CertificateIssued{}
err := event.Data().ToProto(data)
if err != nil {
return err
}
a.certificate = data.Certificate.GetCertificate()
a.caCertBundle = data.Certificate.GetCa()
case events.CertificateRequestIssued:
// ignored as it does not update the aggregate. TODO: the state of the signing should be tracked in the aggregate, and thus in the projection.
case events.CertificateIssueingFailed:
// ignored as it does not update the aggregate. TODO: the state of the signing should be tracked in the aggregate, and thus in the projection.
default:
return fmt.Errorf("couldn't handle event of type '%s'", event.EventType())
}
return nil
}