status-go/services/local-notifications/core.go

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package localnotifications
import (
"database/sql"
"encoding/json"
"sync"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/event"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/rpc"
"github.com/status-im/status-go/multiaccounts/accounts"
"github.com/status-im/status-go/services/wallet"
"github.com/status-im/status-go/signal"
)
type PushCategory string
type NotificationType string
type NotificationBody interface {
json.Marshaler
}
type Notification struct {
ID common.Hash
Platform float32
Body NotificationBody
BodyType NotificationType
Title string
Message string
Category PushCategory
Deeplink string
Image string
IsScheduled bool
ScheduledTime string
IsConversation bool
IsGroupConversation bool
ConversationID string
Timestamp uint64
Author NotificationAuthor
}
type NotificationAuthor struct {
ID string `json:"id"`
Icon string `json:"icon"`
Name string `json:"name"`
}
// notificationAlias is an interim struct used for json un/marshalling
type notificationAlias struct {
ID common.Hash `json:"id"`
Platform float32 `json:"platform,omitempty"`
Body json.RawMessage `json:"body"`
BodyType NotificationType `json:"bodyType"`
Title string `json:"title,omitempty"`
Message string `json:"message,omitempty"`
Category PushCategory `json:"category,omitempty"`
Deeplink string `json:"deepLink,omitempty"`
Image string `json:"imageUrl,omitempty"`
IsScheduled bool `json:"isScheduled,omitempty"`
ScheduledTime string `json:"scheduleTime,omitempty"`
IsConversation bool `json:"isConversation,omitempty"`
IsGroupConversation bool `json:"isGroupConversation,omitempty"`
ConversationID string `json:"conversationId,omitempty"`
Timestamp uint64 `json:"timestamp,omitempty"`
Author NotificationAuthor `json:"notificationAuthor,omitempty"`
}
// MessageEvent - structure used to pass messages from chat to bus
type MessageEvent struct{}
// CustomEvent - structure used to pass custom user set messages to bus
type CustomEvent struct{}
type transmitter struct {
publisher *event.Feed
wg sync.WaitGroup
quit chan struct{}
}
// Service keeps the state of message bus
type Service struct {
started bool
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WatchingEnabled bool
transmitter *transmitter
walletTransmitter *transmitter
db *Database
walletDB *wallet.Database
accountsDB *accounts.Database
}
func NewService(appDB *sql.DB, network uint64) *Service {
db := NewDB(appDB, network)
walletDB := wallet.NewDB(appDB, network)
accountsDB := accounts.NewDB(appDB)
trans := &transmitter{}
walletTrans := &transmitter{}
return &Service{
db: db,
walletDB: walletDB,
accountsDB: accountsDB,
transmitter: trans,
walletTransmitter: walletTrans,
}
}
func (n *Notification) MarshalJSON() ([]byte, error) {
var body json.RawMessage
if n.Body != nil {
encodedBody, err := n.Body.MarshalJSON()
if err != nil {
return nil, err
}
body = encodedBody
}
alias := notificationAlias{
ID: n.ID,
Platform: n.Platform,
Body: body,
BodyType: n.BodyType,
Category: n.Category,
Title: n.Title,
Message: n.Message,
Deeplink: n.Deeplink,
Image: n.Image,
IsScheduled: n.IsScheduled,
ScheduledTime: n.ScheduledTime,
IsConversation: n.IsConversation,
IsGroupConversation: n.IsGroupConversation,
ConversationID: n.ConversationID,
Timestamp: n.Timestamp,
Author: n.Author,
}
return json.Marshal(alias)
}
func PushMessages(ns []*Notification) {
for _, n := range ns {
pushMessage(n)
}
}
func pushMessage(notification *Notification) {
log.Debug("Pushing a new push notification", "notification", notification)
signal.SendLocalNotifications(notification)
}
// Start Worker which processes all incoming messages
func (s *Service) Start() error {
s.started = true
s.transmitter.quit = make(chan struct{})
s.transmitter.publisher = &event.Feed{}
events := make(chan TransactionEvent, 10)
sub := s.transmitter.publisher.Subscribe(events)
s.transmitter.wg.Add(1)
go func() {
defer s.transmitter.wg.Done()
for {
select {
case <-s.transmitter.quit:
sub.Unsubscribe()
return
case err := <-sub.Err():
if err != nil {
log.Error("Local notifications transmitter failed with", "error", err)
}
return
case event := <-events:
s.transactionsHandler(event)
}
}
}()
log.Info("Successful start")
return nil
}
// Stop worker
func (s *Service) Stop() error {
s.started = false
if s.transmitter.quit != nil {
close(s.transmitter.quit)
s.transmitter.wg.Wait()
s.transmitter.quit = nil
}
if s.walletTransmitter.quit != nil {
close(s.walletTransmitter.quit)
s.walletTransmitter.wg.Wait()
s.walletTransmitter.quit = nil
}
return nil
}
// APIs returns list of available RPC APIs.
func (s *Service) APIs() []rpc.API {
return []rpc.API{
{
Namespace: "localnotifications",
Version: "0.1.0",
Service: NewAPI(s),
},
}
}
// Protocols returns list of p2p protocols.
func (s *Service) Protocols() []p2p.Protocol {
return nil
}
func (s *Service) IsStarted() bool {
return s.started
}