apollo-backend/internal/worker/users.go
2022-03-12 12:50:05 -05:00

327 lines
7.4 KiB
Go

package worker
import (
"context"
"fmt"
"math/rand"
"os"
"strconv"
"strings"
"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/sideshow/apns2"
"github.com/sideshow/apns2/payload"
"github.com/sideshow/apns2/token"
"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 usersWorker struct {
logger *logrus.Logger
statsd *statsd.Client
db *pgxpool.Pool
redis *redis.Client
queue rmq.Connection
reddit *reddit.Client
apns *token.Token
consumers int
accountRepo domain.AccountRepository
deviceRepo domain.DeviceRepository
userRepo domain.UserRepository
watcherRepo domain.WatcherRepository
}
const userNotificationTitleFormat = "👨\u200d🚀 %s"
func NewUsersWorker(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,
redis,
consumers,
)
var apns *token.Token
{
authKey, err := token.AuthKeyFromFile(os.Getenv("APPLE_KEY_PATH"))
if err != nil {
panic(err)
}
apns = &token.Token{
AuthKey: authKey,
KeyID: os.Getenv("APPLE_KEY_ID"),
TeamID: os.Getenv("APPLE_TEAM_ID"),
}
}
return &usersWorker{
logger,
statsd,
db,
redis,
queue,
reddit,
apns,
consumers,
repository.NewPostgresAccount(db),
repository.NewPostgresDevice(db),
repository.NewPostgresUser(db),
repository.NewPostgresWatcher(db),
}
}
func (uw *usersWorker) Start() error {
queue, err := uw.queue.OpenQueue("users")
if err != nil {
return err
}
uw.logger.WithFields(logrus.Fields{
"numConsumers": uw.consumers,
}).Info("starting up users worker")
prefetchLimit := int64(uw.consumers * 2)
if err := queue.StartConsuming(prefetchLimit, pollDuration); err != nil {
return err
}
host, _ := os.Hostname()
for i := 0; i < uw.consumers; i++ {
name := fmt.Sprintf("consumer %s-%d", host, i)
consumer := NewUsersConsumer(uw, i)
if _, err := queue.AddConsumer(name, consumer); err != nil {
return err
}
}
return nil
}
func (uw *usersWorker) Stop() {
<-uw.queue.StopAllConsuming() // wait for all Consume() calls to finish
}
type usersConsumer struct {
*usersWorker
tag int
apnsSandbox *apns2.Client
apnsProduction *apns2.Client
}
func NewUsersConsumer(uw *usersWorker, tag int) *usersConsumer {
return &usersConsumer{
uw,
tag,
apns2.NewTokenClient(uw.apns),
apns2.NewTokenClient(uw.apns).Production(),
}
}
func (uc *usersConsumer) Consume(delivery rmq.Delivery) {
ctx := context.Background()
uc.logger.WithFields(logrus.Fields{
"user#id": delivery.Payload(),
}).Debug("starting job")
id, err := strconv.ParseInt(delivery.Payload(), 10, 64)
if err != nil {
uc.logger.WithFields(logrus.Fields{
"user#id": delivery.Payload(),
"err": err,
}).Error("failed to parse user ID")
_ = delivery.Reject()
return
}
defer func() { _ = delivery.Ack() }()
user, err := uc.userRepo.GetByID(ctx, id)
if err != nil {
uc.logger.WithFields(logrus.Fields{
"err": err,
}).Error("failed to fetch user from database")
return
}
watchers, err := uc.watcherRepo.GetByUserID(ctx, user.ID)
if err != nil {
uc.logger.WithFields(logrus.Fields{
"user#id": user.ID,
"err": err,
}).Error("failed to fetch watchers from database")
return
}
if len(watchers) == 0 {
uc.logger.WithFields(logrus.Fields{
"user#id": user.ID,
}).Info("no watchers for user, skipping")
return
}
// Load 25 newest posts
i := rand.Intn(len(watchers))
watcher := watchers[i]
acc, _ := uc.accountRepo.GetByID(ctx, watcher.AccountID)
rac := uc.reddit.NewAuthenticatedClient(acc.AccountID, acc.RefreshToken, acc.AccessToken)
ru, err := rac.UserAbout(user.Name)
if err != nil {
uc.logger.WithFields(logrus.Fields{
"user#id": user.ID,
"err": err,
}).Error("failed to fetch user details")
return
}
if !ru.AcceptFollowers {
uc.logger.WithFields(logrus.Fields{
"user#id": user.ID,
}).Info("user disabled followers, removing")
if err := uc.watcherRepo.DeleteByTypeAndWatcheeID(ctx, domain.UserWatcher, user.ID); err != nil {
uc.logger.WithFields(logrus.Fields{
"user#id": user.ID,
"err": err,
}).Error("failed to delete watchers for user who does not allow followers")
return
}
if err := uc.userRepo.Delete(ctx, user.ID); err != nil {
uc.logger.WithFields(logrus.Fields{
"user#id": user.ID,
"err": err,
}).Error("failed to delete user")
return
}
}
posts, err := rac.UserPosts(user.Name)
if err != nil {
uc.logger.WithFields(logrus.Fields{
"user#id": user.ID,
"err": err,
}).Error("failed to fetch user activity")
return
}
for _, post := range posts.Children {
lowcaseSubreddit := strings.ToLower(post.Subreddit)
if post.SubredditType == "private" {
continue
}
notifs := []domain.Watcher{}
for _, watcher := range watchers {
// Make sure we only alert on activities created after the search
if watcher.CreatedAt > post.CreatedAt {
continue
}
if watcher.LastNotifiedAt > post.CreatedAt {
continue
}
if watcher.Subreddit != "" && lowcaseSubreddit != watcher.Subreddit {
continue
}
notifs = append(notifs, watcher)
}
if len(notifs) == 0 {
continue
}
payload := payloadFromUserPost(post)
notification := &apns2.Notification{}
notification.Topic = "com.christianselig.Apollo"
for _, watcher := range notifs {
if err := uc.watcherRepo.IncrementHits(ctx, watcher.ID); err != nil {
uc.logger.WithFields(logrus.Fields{
"user#id": user.ID,
"watcher#id": watcher.ID,
"err": err,
}).Error("could not increment hits")
return
}
device, _ := uc.deviceRepo.GetByID(ctx, watcher.DeviceID)
title := fmt.Sprintf(userNotificationTitleFormat, watcher.Label)
payload.AlertTitle(title)
notification.Payload = payload
notification.DeviceToken = device.APNSToken
client := uc.apnsProduction
if device.Sandbox {
client = uc.apnsSandbox
}
res, err := client.Push(notification)
if err != nil || !res.Sent() {
_ = uc.statsd.Incr("apns.notification.errors", []string{}, 1)
uc.logger.WithFields(logrus.Fields{
"user#id": user.ID,
"device#id": device.ID,
"err": err,
"status": res.StatusCode,
"reason": res.Reason,
}).Error("failed to send notification")
} else {
_ = uc.statsd.Incr("apns.notification.sent", []string{}, 1)
uc.logger.WithFields(logrus.Fields{
"user#id": user.ID,
"device#id": device.ID,
"device#token": device.APNSToken,
}).Info("sent notification")
}
}
}
uc.logger.WithFields(logrus.Fields{
"user#id": user.ID,
"user#name": user.Name,
}).Debug("finishing job")
}
func payloadFromUserPost(post *reddit.Thing) *payload.Payload {
payload := payload.
NewPayload().
AlertBody(post.Title).
AlertSubtitle(post.Author).
AlertSummaryArg(post.Author).
Category("user-watch").
Custom("post_title", post.Title).
Custom("post_id", post.ID).
Custom("subreddit", post.Subreddit).
Custom("author", post.Author).
Custom("post_age", post.CreatedAt).
MutableContent().
Sound("traloop.wav")
return payload
}