/
agendas.go
94 lines (78 loc) · 3.44 KB
/
agendas.go
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// Copyright (c) 2017-2018 The Decred developers
// Use of this source code is governed by an ISC
// license that can be found in the LICENSE file.
package udb
import (
"decred.org/dcrwallet/v3/errors"
"decred.org/dcrwallet/v3/wallet/walletdb"
"github.com/decred/dcrd/chaincfg/chainhash"
)
type agendaPreferencesTy struct {
}
var agendaPreferences agendaPreferencesTy
var (
defaultAgendaPrefsBucketKey = []byte("agendaprefs")
ticketsAgendaPrefsBucketKey = []byte("ticketsagendaprefs")
)
func (agendaPreferencesTy) key(version uint32, agendaID string) []byte {
k := make([]byte, 4+len(agendaID))
byteOrder.PutUint32(k, version)
copy(k[4:], agendaID)
return k
}
func (agendaPreferencesTy) defaultBucketKey() []byte { return defaultAgendaPrefsBucketKey }
func (agendaPreferencesTy) ticketsBucketKey() []byte { return ticketsAgendaPrefsBucketKey }
func (t agendaPreferencesTy) setDefaultPreference(tx walletdb.ReadWriteTx, version uint32, agendaID, choiceID string) error {
b := tx.ReadWriteBucket(t.defaultBucketKey())
return b.Put(t.key(version, agendaID), []byte(choiceID))
}
func (t agendaPreferencesTy) setTicketPreference(tx walletdb.ReadWriteTx, txHash *chainhash.Hash, version uint32, agendaID, choiceID string) error {
b, err := tx.ReadWriteBucket(t.ticketsBucketKey()).CreateBucketIfNotExists(txHash[:])
if err != nil {
return err
}
return b.Put(t.key(version, agendaID), []byte(choiceID))
}
func (t agendaPreferencesTy) defaultPreference(dbtx walletdb.ReadTx, version uint32, agendaID string) (choiceID string) {
b := dbtx.ReadBucket(t.defaultBucketKey())
v := b.Get(t.key(version, agendaID))
return string(v)
}
func (t agendaPreferencesTy) ticketPreference(dbtx walletdb.ReadTx, ticketHash *chainhash.Hash, version uint32, agendaID string) (choiceID string) {
ticketBucket := dbtx.ReadBucket(t.ticketsBucketKey()).NestedReadBucket(ticketHash[:])
if ticketBucket == nil {
return ""
}
v := ticketBucket.Get(t.key(version, agendaID))
return string(v)
}
// SetDefaultAgendaPreference saves a default agenda choice ID for an agenda ID
// and deployment version.
func SetDefaultAgendaPreference(dbtx walletdb.ReadWriteTx, version uint32, agendaID, choiceID string) error {
err := agendaPreferences.setDefaultPreference(dbtx, version, agendaID, choiceID)
if err != nil {
return errors.E(errors.IO, err)
}
return nil
}
// SetTicketAgendaPreference saves a ticket-specific agenda choice ID for an
// agenda ID and deployment version.
func SetTicketAgendaPreference(dbtx walletdb.ReadWriteTx, txHash *chainhash.Hash, version uint32, agendaID, choiceID string) error {
err := agendaPreferences.setTicketPreference(dbtx, txHash, version, agendaID, choiceID)
if err != nil {
return errors.E(errors.IO, err)
}
return nil
}
// DefaultAgendaPreference returns the saved default choice ID, if any, for an
// agenda ID and deployment version. If no choice has been saved, this returns
// the empty string.
func DefaultAgendaPreference(dbtx walletdb.ReadTx, version uint32, agendaID string) (choiceID string) {
return agendaPreferences.defaultPreference(dbtx, version, agendaID)
}
// TicketAgendaPreference returns a ticket's saved choice ID, if any, for an agenda
// ID and deployment version. If no choice has been saved, this returns the empty
// string.
func TicketAgendaPreference(dbtx walletdb.ReadTx, ticketHash *chainhash.Hash, version uint32, agendaID string) (choiceID string) {
return agendaPreferences.ticketPreference(dbtx, ticketHash, version, agendaID)
}