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service.go
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service.go
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package bertymessenger
import (
"context"
"errors"
"sync"
"time"
// nolint:staticcheck // cannot use the new protobuf API while keeping gogoproto
"github.com/golang/protobuf/proto"
"go.uber.org/zap"
"gorm.io/driver/sqlite"
"gorm.io/gorm"
"moul.io/u"
"moul.io/zapgorm2"
"berty.tech/berty/v2/go/internal/lifecycle"
"berty.tech/berty/v2/go/internal/notification"
"berty.tech/berty/v2/go/pkg/bertyprotocol"
"berty.tech/berty/v2/go/pkg/bertytypes"
"berty.tech/berty/v2/go/pkg/bertyversion"
"berty.tech/berty/v2/go/pkg/errcode"
)
type Service interface {
MessengerServiceServer
Close()
}
// service is a Service
var _ Service = (*service)(nil)
type service struct {
logger *zap.Logger
protocolClient bertyprotocol.ProtocolServiceClient
startedAt time.Time
db *gorm.DB
dispatcher *Dispatcher
cancelFn func()
optsCleanup func()
ctx context.Context
handlerMutex sync.Mutex
notifmanager notification.Manager
lcmanager *lifecycle.Manager
}
type Opts struct {
Logger *zap.Logger
DB *gorm.DB
NotificationManager notification.Manager
LifeCycleManager *lifecycle.Manager
}
func (opts *Opts) applyDefaults() (func(), error) {
cleanup := func() {}
if opts.Logger == nil {
opts.Logger = zap.NewNop()
}
if opts.DB == nil {
opts.Logger.Warn("Messenger started without database, creating a volatile one in memory")
zapLogger := zapgorm2.New(opts.Logger.Named("gorm"))
zapLogger.SetAsDefault()
db, err := gorm.Open(sqlite.Open("file::memory:?cache=shared"), &gorm.Config{Logger: zapLogger})
if err != nil {
return nil, err
}
cleanup = func() {
sqlDB, _ := db.DB()
u.SilentClose(sqlDB)
}
opts.DB = db
}
if opts.NotificationManager == nil {
opts.NotificationManager = notification.NewNoopManager()
}
if opts.LifeCycleManager == nil {
opts.LifeCycleManager = lifecycle.NewManager(StateActive)
}
return cleanup, nil
}
func New(client bertyprotocol.ProtocolServiceClient, opts *Opts) (Service, error) {
optsCleanup, err := opts.applyDefaults()
if err != nil {
return nil, errcode.TODO.Wrap(err)
}
opts.Logger = opts.Logger.Named("msg")
opts.Logger.Debug("initializing messenger", zap.String("version", bertyversion.Version))
if err := initDB(opts.DB); err != nil {
return nil, errcode.TODO.Wrap(err)
}
ctx, cancel := context.WithCancel(context.Background())
svc := service{
protocolClient: client,
logger: opts.Logger,
startedAt: time.Now(),
db: opts.DB,
notifmanager: opts.NotificationManager,
lcmanager: opts.LifeCycleManager,
dispatcher: NewDispatcher(),
cancelFn: cancel,
optsCleanup: optsCleanup,
ctx: ctx,
handlerMutex: sync.Mutex{},
}
icr, err := client.InstanceGetConfiguration(ctx, &bertytypes.InstanceGetConfiguration_Request{})
if err != nil {
return nil, err
}
pkStr := bytesToString(icr.GetAccountGroupPK())
// get or create account in DB
{
acc, err := getAccount(svc.db)
switch {
case err == gorm.ErrRecordNotFound: // account not found, create a new one
svc.logger.Debug("account not found, creating a new one", zap.String("pk", pkStr))
ret, err := svc.internalInstanceShareableBertyID(ctx, &InstanceShareableBertyID_Request{})
if err != nil {
return nil, err
}
acc = Account{
PublicKey: pkStr,
Link: ret.GetHTMLURL(),
State: Account_NotReady,
}
if err := svc.db.Create(&acc).Error; err != nil {
return nil, err
}
case err != nil: // internal error
return nil, err
case err == nil && pkStr != acc.GetPublicKey(): // Check that we are connected to the correct node
// FIXME: use errcode
return nil, errcode.TODO.Wrap(errors.New("messenger's account key does not match protocol's account key"))
default: // account exists, and public keys match
// noop
}
}
// monitor messenger lifecycle
go svc.monitorState(ctx)
// Dispatch app notifications to native manager
svc.dispatcher.Register(&NotifieeBundle{StreamEventImpl: func(se *StreamEvent) error {
if se.GetType() != StreamEvent_TypeNotified {
return nil
}
var notif *StreamEvent_Notified
{
payload, err := se.UnmarshalPayload()
if err != nil {
opts.Logger.Error("unable to unmarshal Notified", zap.Error(err))
return nil
}
notif = payload.(*StreamEvent_Notified)
}
if svc.lcmanager.GetCurrentState() == StateInactive {
if err := svc.notifmanager.Notify(¬ification.Notification{
Title: notif.GetTitle(),
Body: notif.GetBody(),
}); err != nil {
opts.Logger.Error("unable to trigger notify", zap.Error(err))
}
}
return nil
}})
// Subscribe to account group metadata
err = svc.subscribeToMetadata(icr.GetAccountGroupPK())
if err != nil {
return nil, err
}
// subscribe to groups
{
var convs []Conversation
err := svc.db.Find(&convs).Error
if err != nil {
return nil, err
}
for _, cv := range convs {
gpkb, err := stringToBytes(cv.GetPublicKey())
if err != nil {
return nil, err
}
_, err = svc.protocolClient.ActivateGroup(svc.ctx, &bertytypes.ActivateGroup_Request{GroupPK: gpkb})
if err != nil {
return nil, err
}
if err := svc.subscribeToGroup(gpkb); err != nil {
return nil, err
}
}
}
// subscribe to contact groups
{
var contacts []Contact
err := svc.db.Find(&contacts).Error
if err != nil {
return nil, err
}
for _, c := range contacts {
if c.State != Contact_OutgoingRequestSent {
continue
}
gpkb, err := stringToBytes(c.GetConversationPublicKey())
if err != nil {
return nil, err
}
_, err = svc.protocolClient.ActivateGroup(svc.ctx, &bertytypes.ActivateGroup_Request{GroupPK: gpkb})
if err != nil {
return nil, err
}
if err := svc.subscribeToMetadata(gpkb); err != nil {
return nil, err
}
}
}
return &svc, nil
}
func (svc *service) subscribeToMetadata(gpkb []byte) error {
// subscribe
s, err := svc.protocolClient.GroupMetadataList(
svc.ctx,
&bertytypes.GroupMetadataList_Request{GroupPK: gpkb},
)
if err != nil {
return errcode.ErrEventListMetadata.Wrap(err)
}
go func() {
for {
gme, err := s.Recv()
if err != nil {
svc.logStreamingError("group metadata", err)
return
}
svc.handlerMutex.Lock()
err = handleProtocolEvent(svc, gme)
svc.handlerMutex.Unlock()
if err != nil {
svc.logger.Error("failed to handle protocol event", zap.Error(errcode.ErrInternal.Wrap(err)))
}
}
}()
return nil
}
func (svc *service) subscribeToMessages(gpkb []byte) error {
ms, err := svc.protocolClient.GroupMessageList(
svc.ctx,
&bertytypes.GroupMessageList_Request{GroupPK: gpkb},
)
if err != nil {
return errcode.ErrEventListMessage.Wrap(err)
}
go func() {
for {
gme, err := ms.Recv()
if err != nil {
svc.logStreamingError("group message", err)
return
}
var am AppMessage
if err := proto.Unmarshal(gme.GetMessage(), &am); err != nil {
svc.logger.Warn("failed to unmarshal AppMessage", zap.Error(err))
return
}
svc.handlerMutex.Lock()
err = handleAppMessage(svc, bytesToString(gpkb), gme, &am)
svc.handlerMutex.Unlock()
if err != nil {
svc.logger.Error("failed to handle app message", zap.Error(errcode.ErrInternal.Wrap(err)))
}
}
}()
return nil
}
func (svc *service) subscribeToGroup(gpkb []byte) error {
if err := svc.subscribeToMetadata(gpkb); err != nil {
return err
}
return svc.subscribeToMessages(gpkb)
}
func (svc *service) Close() {
svc.logger.Debug("closing service")
svc.dispatcher.UnregisterAll()
svc.cancelFn()
svc.optsCleanup()
}