apollo-backend/internal/worker/stuck_notifications.go

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package worker
import (
"context"
"fmt"
"os"
"strconv"
"github.com/DataDog/datadog-go/statsd"
"github.com/adjust/rmq/v4"
"github.com/go-redis/redis/v8"
"github.com/jackc/pgx/v4/pgxpool"
"github.com/sirupsen/logrus"
"github.com/christianselig/apollo-backend/internal/domain"
"github.com/christianselig/apollo-backend/internal/reddit"
"github.com/christianselig/apollo-backend/internal/repository"
)
type stuckNotificationsWorker struct {
logger *logrus.Logger
statsd *statsd.Client
db *pgxpool.Pool
redis *redis.Client
queue rmq.Connection
reddit *reddit.Client
consumers int
accountRepo domain.AccountRepository
}
func NewStuckNotificationsWorker(logger *logrus.Logger, statsd *statsd.Client, db *pgxpool.Pool, redis *redis.Client, queue rmq.Connection, consumers int) Worker {
reddit := reddit.NewClient(
os.Getenv("REDDIT_CLIENT_ID"),
os.Getenv("REDDIT_CLIENT_SECRET"),
statsd,
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redis,
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consumers,
)
return &stuckNotificationsWorker{
logger,
statsd,
db,
redis,
queue,
reddit,
consumers,
repository.NewPostgresAccount(db),
}
}
func (snw *stuckNotificationsWorker) Start() error {
queue, err := snw.queue.OpenQueue("stuck-notifications")
if err != nil {
return err
}
snw.logger.WithFields(logrus.Fields{
"numConsumers": snw.consumers,
}).Info("starting up stuck notifications worker")
prefetchLimit := int64(snw.consumers * 2)
if err := queue.StartConsuming(prefetchLimit, pollDuration); err != nil {
return err
}
host, _ := os.Hostname()
for i := 0; i < snw.consumers; i++ {
name := fmt.Sprintf("consumer %s-%d", host, i)
consumer := NewStuckNotificationsConsumer(snw, i)
if _, err := queue.AddConsumer(name, consumer); err != nil {
return err
}
}
return nil
}
func (snw *stuckNotificationsWorker) Stop() {
<-snw.queue.StopAllConsuming() // wait for all Consume() calls to finish
}
type stuckNotificationsConsumer struct {
*stuckNotificationsWorker
tag int
}
func NewStuckNotificationsConsumer(snw *stuckNotificationsWorker, tag int) *stuckNotificationsConsumer {
return &stuckNotificationsConsumer{
snw,
tag,
}
}
func (snc *stuckNotificationsConsumer) Consume(delivery rmq.Delivery) {
ctx := context.Background()
snc.logger.WithFields(logrus.Fields{
"account#id": delivery.Payload(),
}).Debug("starting job")
id, err := strconv.ParseInt(delivery.Payload(), 10, 64)
if err != nil {
snc.logger.WithFields(logrus.Fields{
"account#id": delivery.Payload(),
"err": err,
}).Error("failed to parse account ID")
_ = delivery.Reject()
return
}
defer func() { _ = delivery.Ack() }()
account, err := snc.accountRepo.GetByID(ctx, id)
if err != nil {
snc.logger.WithFields(logrus.Fields{
"err": err,
}).Error("failed to fetch account from database")
return
}
if account.LastMessageID == "" {
snc.logger.WithFields(logrus.Fields{
"account#username": account.NormalizedUsername(),
}).Debug("account has no messages, returning")
return
}
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rac := snc.reddit.NewAuthenticatedClient(account.AccountID, account.RefreshToken, account.AccessToken)
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snc.logger.WithFields(logrus.Fields{
"account#username": account.NormalizedUsername(),
"thing#id": account.LastMessageID,
}).Debug("fetching last thing")
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kind := account.LastMessageID[:2]
var things *reddit.ListingResponse
if kind == "t4" {
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snc.logger.WithFields(logrus.Fields{
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"account#username": account.NormalizedUsername(),
"thing#id": account.LastMessageID,
}).Debug("checking last thing via inbox")
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things, err = rac.MessageInbox()
if err != nil {
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snc.logger.WithFields(logrus.Fields{
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"err": err,
}).Error("failed to fetch last thing via inbox")
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return
}
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} else {
things, err = rac.AboutInfo(account.LastMessageID)
if err != nil {
snc.logger.WithFields(logrus.Fields{
"err": err,
}).Error("failed to fetch last thing")
return
}
}
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if things.Count > 0 {
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for _, thing := range things.Children {
if thing.FullName() != account.LastMessageID {
continue
}
if !thing.IsDeleted() {
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snc.logger.WithFields(logrus.Fields{
"account#username": account.NormalizedUsername(),
"thing#id": account.LastMessageID,
}).Debug("thing exists, returning")
return
}
}
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}
snc.logger.WithFields(logrus.Fields{
"account#username": account.NormalizedUsername(),
"thing#id": account.LastMessageID,
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}).Info("thing got deleted, resetting")
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if kind != "t4" {
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snc.logger.WithFields(logrus.Fields{
"account#username": account.NormalizedUsername(),
}).Debug("getting message inbox to determine last good thing")
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things, err = rac.MessageInbox()
if err != nil {
snc.logger.WithFields(logrus.Fields{
"account#username": account.NormalizedUsername(),
"err": err,
}).Error("failed to get message inbox")
return
}
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}
account.LastMessageID = ""
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snc.logger.WithFields(logrus.Fields{
"account#username": account.NormalizedUsername(),
}).Debug("calculating last good thing")
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for _, thing := range things.Children {
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if thing.IsDeleted() {
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snc.logger.WithFields(logrus.Fields{
"account#username": account.NormalizedUsername(),
"thing#id": thing.FullName(),
}).Debug("thing deleted, next")
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continue
}
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account.LastMessageID = thing.FullName()
break
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}
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snc.logger.WithFields(logrus.Fields{
"account#username": account.NormalizedUsername(),
"thing#id": account.LastMessageID,
}).Debug("updating last good thing")
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if err := snc.accountRepo.Update(ctx, &account); err != nil {
snc.logger.WithFields(logrus.Fields{
"account#username": account.NormalizedUsername(),
"err": err,
}).Error("failed to update account's message id")
}
}