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package mautrix
import (
"maunium.net/go/mautrix/id"
)
// SyncStore is an interface which must be satisfied to store client data.
//
// You can either write a struct which persists this data to disk, or you can use the
// provided "MemorySyncStore" which just keeps data around in-memory which is lost on
// restarts.
type SyncStore interface {
SaveFilterID(userID id.UserID, filterID string)
LoadFilterID(userID id.UserID) string
SaveNextBatch(userID id.UserID, nextBatchToken string)
LoadNextBatch(userID id.UserID) string
}
// Deprecated: renamed to SyncStore
type Storer = SyncStore
// MemorySyncStore implements the Storer interface.
//
// Everything is persisted in-memory as maps. It is not safe to load/save filter IDs
// or next batch tokens on any goroutine other than the syncing goroutine: the one
// which called Client.Sync().
type MemorySyncStore struct {
Filters map[id.UserID]string
NextBatch map[id.UserID]string
}
// SaveFilterID to memory.
func (s *MemorySyncStore) SaveFilterID(userID id.UserID, filterID string) {
s.Filters[userID] = filterID
}
// LoadFilterID from memory.
func (s *MemorySyncStore) LoadFilterID(userID id.UserID) string {
return s.Filters[userID]
}
// SaveNextBatch to memory.
func (s *MemorySyncStore) SaveNextBatch(userID id.UserID, nextBatchToken string) {
s.NextBatch[userID] = nextBatchToken
}
// LoadNextBatch from memory.
func (s *MemorySyncStore) LoadNextBatch(userID id.UserID) string {
return s.NextBatch[userID]
}
// NewMemorySyncStore constructs a new MemorySyncStore.
func NewMemorySyncStore() *MemorySyncStore {
return &MemorySyncStore{
Filters: make(map[id.UserID]string),
NextBatch: make(map[id.UserID]string),
}
}
// AccountDataStore uses account data to store the next batch token, and stores the filter ID in memory
// (as filters can be safely recreated every startup).
type AccountDataStore struct {
FilterID string
EventType string
client *Client
}
type accountData struct {
NextBatch string `json:"next_batch"`
}
func (s *AccountDataStore) SaveFilterID(userID id.UserID, filterID string) {
if userID.String() != s.client.UserID.String() {
panic("AccountDataStore must only be used with a single account")
}
s.FilterID = filterID
}
func (s *AccountDataStore) LoadFilterID(userID id.UserID) string {
if userID.String() != s.client.UserID.String() {
panic("AccountDataStore must only be used with a single account")
}
return s.FilterID
}
func (s *AccountDataStore) SaveNextBatch(userID id.UserID, nextBatchToken string) {
if userID.String() != s.client.UserID.String() {
panic("AccountDataStore must only be used with a single account")
}
data := accountData{
NextBatch: nextBatchToken,
}
err := s.client.SetAccountData(s.EventType, data)
if err != nil {
s.client.Log.Warn().Err(err).Msg("Failed to save next batch token to account data")
}
}
func (s *AccountDataStore) LoadNextBatch(userID id.UserID) string {
if userID.String() != s.client.UserID.String() {
panic("AccountDataStore must only be used with a single account")
}
data := &accountData{}
err := s.client.GetAccountData(s.EventType, data)
if err != nil {
s.client.Log.Warn().Err(err).Msg("Failed to load next batch token from account data")
return ""
}
return data.NextBatch
}
// NewAccountDataStore returns a new AccountDataStore, which stores
// the next_batch token as a custom event in account data in the
// homeserver.
//
// AccountDataStore is only appropriate for bots, not appservices.
//
// The event type should be a reversed DNS name like tld.domain.sub.internal and
// must be unique for a client. The data stored in it is considered internal
// and must not be modified through outside means. You should also add a filter
// for account data changes of this event type, to avoid ending up in a sync
// loop:
//
// filter := mautrix.Filter{
// AccountData: mautrix.FilterPart{
// Limit: 20,
// NotTypes: []event.Type{
// event.NewEventType(eventType),
// },
// },
// }
// // If you use a custom Syncer, set the filter there, not like this
// client.Syncer.(*mautrix.DefaultSyncer).FilterJSON = &filter
// client.Store = mautrix.NewAccountDataStore("com.example.mybot.store", client)
// go func() {
// err := client.Sync()
// // don't forget to check err
// }()
func NewAccountDataStore(eventType string, client *Client) *AccountDataStore {
return &AccountDataStore{
EventType: eventType,
client: client,
}
}
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