mirror of
https://github.com/christianselig/apollo-backend
synced 2024-11-13 23:47:44 +00:00
336 lines
7.9 KiB
Go
336 lines
7.9 KiB
Go
package worker
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import (
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"context"
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"fmt"
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"math/rand"
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"os"
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"strconv"
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"strings"
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"github.com/DataDog/datadog-go/statsd"
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"github.com/adjust/rmq/v5"
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"github.com/go-redis/redis/v8"
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"github.com/jackc/pgx/v5/pgxpool"
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"github.com/sideshow/apns2"
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"github.com/sideshow/apns2/payload"
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"github.com/sideshow/apns2/token"
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"go.opentelemetry.io/otel/trace"
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"go.uber.org/zap"
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"github.com/christianselig/apollo-backend/internal/domain"
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"github.com/christianselig/apollo-backend/internal/reddit"
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"github.com/christianselig/apollo-backend/internal/repository"
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)
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type usersWorker struct {
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context.Context
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logger *zap.Logger
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tracer trace.Tracer
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statsd *statsd.Client
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db *pgxpool.Pool
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redis *redis.Client
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queue rmq.Connection
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reddit *reddit.Client
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apns *token.Token
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consumers int
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accountRepo domain.AccountRepository
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deviceRepo domain.DeviceRepository
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userRepo domain.UserRepository
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watcherRepo domain.WatcherRepository
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}
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const userNotificationTitleFormat = "👨\u200d🚀 %s"
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func NewUsersWorker(ctx context.Context, logger *zap.Logger, tracer trace.Tracer, statsd *statsd.Client, db *pgxpool.Pool, redis *redis.Client, queue rmq.Connection, consumers int) Worker {
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reddit := reddit.NewClient(
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os.Getenv("REDDIT_CLIENT_ID"),
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os.Getenv("REDDIT_CLIENT_SECRET"),
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tracer,
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statsd,
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redis,
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consumers,
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)
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var apns *token.Token
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{
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authKey, err := token.AuthKeyFromFile(os.Getenv("APPLE_KEY_PATH"))
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if err != nil {
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panic(err)
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}
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apns = &token.Token{
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AuthKey: authKey,
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KeyID: os.Getenv("APPLE_KEY_ID"),
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TeamID: os.Getenv("APPLE_TEAM_ID"),
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}
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}
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return &usersWorker{
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ctx,
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logger,
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tracer,
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statsd,
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db,
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redis,
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queue,
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reddit,
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apns,
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consumers,
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repository.NewPostgresAccount(db),
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repository.NewPostgresDevice(db),
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repository.NewPostgresUser(db),
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repository.NewPostgresWatcher(db),
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}
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}
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func (uw *usersWorker) Start() error {
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queue, err := uw.queue.OpenQueue("users")
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if err != nil {
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return err
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}
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uw.logger.Info("starting up subreddits worker", zap.Int("consumers", uw.consumers))
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prefetchLimit := int64(uw.consumers * 2)
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if err := queue.StartConsuming(prefetchLimit, pollDuration); err != nil {
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return err
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}
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host, _ := os.Hostname()
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for i := 0; i < uw.consumers; i++ {
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name := fmt.Sprintf("consumer %s-%d", host, i)
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consumer := NewUsersConsumer(uw, i)
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if _, err := queue.AddConsumer(name, consumer); err != nil {
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return err
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}
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}
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return nil
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}
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func (uw *usersWorker) Stop() {
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<-uw.queue.StopAllConsuming() // wait for all Consume() calls to finish
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}
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type usersConsumer struct {
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*usersWorker
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tag int
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apnsSandbox *apns2.Client
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apnsProduction *apns2.Client
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}
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func NewUsersConsumer(uw *usersWorker, tag int) *usersConsumer {
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return &usersConsumer{
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uw,
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tag,
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apns2.NewTokenClient(uw.apns),
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apns2.NewTokenClient(uw.apns).Production(),
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}
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}
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func (uc *usersConsumer) Consume(delivery rmq.Delivery) {
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ctx, cancel := context.WithCancel(uc)
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defer cancel()
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id, err := strconv.ParseInt(delivery.Payload(), 10, 64)
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if err != nil {
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uc.logger.Error("failed to parse subreddit id from payload", zap.Error(err), zap.String("payload", delivery.Payload()))
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_ = delivery.Reject()
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return
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}
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uc.logger.Debug("starting job", zap.Int64("subreddit#id", id))
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defer func() { _ = delivery.Ack() }()
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user, err := uc.userRepo.GetByID(ctx, id)
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if err != nil {
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uc.logger.Error("failed to fetch user from database", zap.Error(err), zap.Int64("subreddit#id", id))
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return
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}
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watchers, err := uc.watcherRepo.GetByUserID(ctx, user.ID)
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if err != nil {
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uc.logger.Error("failed to fetch watchers from database",
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zap.Error(err),
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zap.Int64("user#id", id),
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zap.String("user#name", user.NormalizedName()),
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)
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return
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}
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if len(watchers) == 0 {
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uc.logger.Debug("no watchers for user, bailing early",
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zap.Int64("user#id", id),
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zap.String("user#name", user.NormalizedName()),
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)
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return
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}
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// Load 25 newest posts
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i := rand.Intn(len(watchers))
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watcher := watchers[i]
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acc, _ := uc.accountRepo.GetByID(ctx, watcher.AccountID)
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rac := uc.reddit.NewAuthenticatedClient(acc.AccountID, acc.RefreshToken, acc.AccessToken)
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ru, err := rac.UserAbout(ctx, user.Name)
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if err != nil {
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uc.logger.Error("failed to fetch user details",
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zap.Error(err),
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zap.Int64("user#id", id),
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zap.String("user#name", user.NormalizedName()),
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)
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return
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}
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if !ru.AcceptFollowers {
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uc.logger.Info("user disabled followers, removing",
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zap.Int64("user#id", id),
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zap.String("user#name", user.NormalizedName()),
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)
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if err := uc.watcherRepo.DeleteByTypeAndWatcheeID(ctx, domain.UserWatcher, user.ID); err != nil {
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uc.logger.Error("failed to remove watchers for user who disallows followers",
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zap.Error(err),
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zap.Int64("user#id", id),
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zap.String("user#name", user.NormalizedName()),
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)
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return
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}
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if err := uc.userRepo.Delete(ctx, user.ID); err != nil {
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uc.logger.Error("failed to remove user",
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zap.Error(err),
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zap.Int64("user#id", id),
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zap.String("user#name", user.NormalizedName()),
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)
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return
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}
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}
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posts, err := rac.UserPosts(ctx, user.Name)
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if err != nil {
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uc.logger.Error("failed to fetch user activity",
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zap.Error(err),
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zap.Int64("user#id", id),
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zap.String("user#name", user.NormalizedName()),
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)
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return
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}
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for _, post := range posts.Children {
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lowcaseSubreddit := strings.ToLower(post.Subreddit)
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if post.SubredditType == "private" {
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continue
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}
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notifs := []domain.Watcher{}
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for _, watcher := range watchers {
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// Make sure we only alert on activities created after the search
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if watcher.CreatedAt.After(post.CreatedAt) {
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continue
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}
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if watcher.LastNotifiedAt.After(post.CreatedAt) {
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continue
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}
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if watcher.Subreddit != "" && lowcaseSubreddit != watcher.Subreddit {
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continue
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}
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notifs = append(notifs, watcher)
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}
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if len(notifs) == 0 {
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continue
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}
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payload := payloadFromUserPost(post)
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notification := &apns2.Notification{}
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notification.Topic = "com.christianselig.Apollo"
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for _, watcher := range notifs {
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if err := uc.watcherRepo.IncrementHits(ctx, watcher.ID); err != nil {
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uc.logger.Error("failed to increment watcher hits",
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zap.Error(err),
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zap.Int64("user#id", id),
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zap.String("user#name", user.NormalizedName()),
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zap.Int64("watcher#id", watcher.ID),
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)
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return
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}
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device, _ := uc.deviceRepo.GetByID(ctx, watcher.DeviceID)
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title := fmt.Sprintf(userNotificationTitleFormat, watcher.Label)
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payload.AlertTitle(title)
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notification.Payload = payload
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notification.DeviceToken = device.APNSToken
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client := uc.apnsProduction
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if device.Sandbox {
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client = uc.apnsSandbox
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}
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res, err := client.Push(notification)
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if err != nil || !res.Sent() {
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_ = uc.statsd.Incr("apns.notification.errors", []string{}, 1)
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uc.logger.Error("failed to send notification",
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zap.Error(err),
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zap.Int64("user#id", id),
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zap.String("user#name", user.NormalizedName()),
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zap.String("post#id", post.ID),
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zap.String("apns", watcher.Device.APNSToken),
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zap.Int("response#status", res.StatusCode),
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zap.String("response#reason", res.Reason),
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)
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} else {
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_ = uc.statsd.Incr("apns.notification.sent", []string{}, 1)
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uc.logger.Info("sent notification",
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zap.Int64("user#id", id),
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zap.String("user#name", user.NormalizedName()),
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zap.String("post#id", post.ID),
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zap.String("device#token", watcher.Device.APNSToken),
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)
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}
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}
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}
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uc.logger.Debug("finishing job",
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zap.Int64("user#id", id),
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zap.String("user#name", user.NormalizedName()),
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)
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}
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func payloadFromUserPost(post *reddit.Thing) *payload.Payload {
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payload := payload.
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NewPayload().
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AlertBody(post.Title).
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AlertSubtitle(post.Author).
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AlertSummaryArg(post.Author).
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Category("user-watch").
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Custom("post_title", post.Title).
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Custom("post_id", post.ID).
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Custom("subreddit", post.Subreddit).
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Custom("author", post.Author).
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Custom("post_age", post.CreatedAt).
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MutableContent().
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Sound("traloop.wav")
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return payload
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}
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