/
events.go
52 lines (42 loc) · 1.16 KB
/
events.go
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package internal
import (
"context"
"encoding/json"
"github.com/justanotherorganization/justanotherbotkit/users"
"github.com/pkg/errors"
bolt "go.etcd.io/bbolt"
)
// ErrNotImplemented is returned if Apply is attempted on an internal event type.
var ErrNotImplemented = errors.New("not implemented")
type (
// Event represents a database event.
Event interface {
Apply(ctx context.Context, _db *bolt.DB) (users.User, error)
}
event struct {
snap *Snapshot
}
)
// Apply is a dummy apply function present in all events.
// It should be overwritten.
func (e *event) Apply(ctx context.Context, _db *bolt.DB) (users.User, error) {
return nil, ErrNotImplemented
}
func (e *event) _save(ctx context.Context, _db *bolt.DB) (users.User, error) {
byt, err := json.Marshal(e.snap)
if err != nil {
return e.snap.User, err
}
if err = _db.Update(func(tx *bolt.Tx) error {
b := tx.Bucket(SnapshotBucket)
err := b.Put([]byte(e.snap.ID), byt)
if err != nil {
return err
}
b = tx.Bucket(MainBucket)
return b.Put([]byte(e.snap.User.GetID()), byt)
}); err != nil {
return e.snap.User, errors.Wrap(err, "_db.Update")
}
return Get(e.snap.User.GetID(), _db)
}