mirror of
https://github.com/christianselig/apollo-backend
synced 2024-11-13 07:27:43 +00:00
332 lines
8.8 KiB
Go
332 lines
8.8 KiB
Go
package worker
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import (
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"context"
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"encoding/json"
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"fmt"
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"os"
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"sort"
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"time"
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"github.com/DataDog/datadog-go/statsd"
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"github.com/adjust/rmq/v4"
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"github.com/go-redis/redis/v8"
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"github.com/jackc/pgx/v4/pgxpool"
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"github.com/sideshow/apns2"
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"github.com/sideshow/apns2/token"
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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 DynamicIslandNotification struct {
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PostCommentCount int `json:"postTotalComments"`
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PostScore int64 `json:"postScore"`
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CommentID string `json:"commentId,omitempty"`
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CommentAuthor string `json:"commentAuthor,omitempty"`
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CommentBody string `json:"commentBody,omitempty"`
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CommentAge int64 `json:"commentAge,omitempty"`
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CommentScore int64 `json:"commentScore,omitempty"`
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}
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type liveActivitiesWorker struct {
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context.Context
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logger *zap.Logger
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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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liveActivityRepo domain.LiveActivityRepository
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}
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func NewLiveActivitiesWorker(ctx context.Context, logger *zap.Logger, 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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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 &liveActivitiesWorker{
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ctx,
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logger,
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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.NewPostgresLiveActivity(db),
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}
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}
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func (law *liveActivitiesWorker) Start() error {
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queue, err := law.queue.OpenQueue("live-activities")
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if err != nil {
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return err
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}
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law.logger.Info("starting up live activities worker", zap.Int("consumers", law.consumers))
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prefetchLimit := int64(law.consumers * 4)
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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 < law.consumers; i++ {
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name := fmt.Sprintf("consumer %s-%d", host, i)
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consumer := NewLiveActivitiesConsumer(law, 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 (law *liveActivitiesWorker) Stop() {
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<-law.queue.StopAllConsuming() // wait for all Consume() calls to finish
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}
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type liveActivitiesConsumer struct {
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*liveActivitiesWorker
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tag int
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apns *apns2.Client
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}
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func NewLiveActivitiesConsumer(law *liveActivitiesWorker, tag int) *liveActivitiesConsumer {
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return &liveActivitiesConsumer{
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law,
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tag,
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apns2.NewTokenClient(law.apns).Production(),
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}
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}
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func (lac *liveActivitiesConsumer) Consume(delivery rmq.Delivery) {
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ctx, cancel := context.WithCancel(lac)
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defer cancel()
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now := time.Now()
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defer func() {
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elapsed := time.Now().Sub(now).Milliseconds()
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_ = lac.statsd.Histogram("apollo.consumer.runtime", float64(elapsed), []string{"queue:live_activities"}, 0.1)
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}()
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at := delivery.Payload()
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key := fmt.Sprintf("locks:live-activities:%s", at)
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// Measure queue latency
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ttl := lac.redis.PTTL(ctx, key).Val()
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age := (domain.NotificationCheckTimeout - ttl)
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_ = lac.statsd.Histogram("apollo.dequeue.latency", float64(age.Milliseconds()), []string{"queue:live_activities"}, 0.1)
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defer func() {
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if err := lac.redis.Del(ctx, key).Err(); err != nil {
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lac.logger.Error("failed to remove account lock", zap.Error(err), zap.String("key", key))
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}
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}()
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lac.logger.Debug("starting job", zap.String("live_activity#apns_token", at))
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defer func() {
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if err := delivery.Ack(); err != nil {
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lac.logger.Error("failed to acknowledge message", zap.Error(err), zap.String("live_activity#apns_token", at))
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}
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}()
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la, err := lac.liveActivityRepo.Get(ctx, at)
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if err != nil {
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lac.logger.Error("failed to get live activity", zap.Error(err), zap.String("live_activity#apns_token", at))
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return
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}
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rac := lac.reddit.NewAuthenticatedClient(la.RedditAccountID, la.RefreshToken, la.AccessToken)
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if la.TokenExpiresAt.Before(now.Add(5 * time.Minute)) {
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lac.logger.Debug("refreshing reddit token",
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zap.String("live_activity#apns_token", at),
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zap.String("reddit#id", la.RedditAccountID),
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zap.String("reddit#access_token", rac.ObfuscatedAccessToken()),
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zap.String("reddit#refresh_token", rac.ObfuscatedRefreshToken()),
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)
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tokens, err := rac.RefreshTokens(ctx)
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if err != nil {
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lac.logger.Error("failed to refresh reddit tokens",
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zap.Error(err),
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zap.String("live_activity#apns_token", at),
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zap.String("reddit#id", la.RedditAccountID),
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zap.String("reddit#access_token", rac.ObfuscatedAccessToken()),
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zap.String("reddit#refresh_token", rac.ObfuscatedRefreshToken()),
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)
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if err == reddit.ErrOauthRevoked {
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_ = lac.liveActivityRepo.Delete(ctx, at)
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}
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return
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}
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// Update account
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la.AccessToken = tokens.AccessToken
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la.RefreshToken = tokens.RefreshToken
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la.TokenExpiresAt = now.Add(tokens.Expiry)
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_ = lac.liveActivityRepo.Update(ctx, &la)
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// Refresh client
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rac = lac.reddit.NewAuthenticatedClient(la.RedditAccountID, tokens.RefreshToken, tokens.AccessToken)
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}
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lac.logger.Debug("fetching latest comments", zap.String("live_activity#apns_token", at))
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tr, err := rac.TopLevelComments(ctx, la.Subreddit, la.ThreadID)
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if err != nil {
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lac.logger.Error("failed to fetch latest comments",
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zap.Error(err),
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zap.String("live_activity#apns_token", at),
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zap.String("reddit#id", la.RedditAccountID),
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zap.String("reddit#access_token", rac.ObfuscatedAccessToken()),
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zap.String("reddit#refresh_token", rac.ObfuscatedRefreshToken()),
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)
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if err == reddit.ErrOauthRevoked {
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_ = lac.liveActivityRepo.Delete(ctx, at)
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}
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return
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}
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if len(tr.Children) == 0 && la.ExpiresAt.After(now) {
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lac.logger.Debug("no comments found", zap.String("live_activity#apns_token", at))
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return
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}
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// Filter out comments in the last minute
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candidates := make([]*reddit.Thing, 0)
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cutoffs := []time.Time{
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now.Add(-domain.LiveActivityCheckInterval),
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now.Add(-domain.LiveActivityCheckInterval * 2),
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now.Add(-domain.LiveActivityCheckInterval * 4),
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}
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for _, cutoff := range cutoffs {
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for _, t := range tr.Children {
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if t.CreatedAt.After(cutoff) {
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candidates = append(candidates, t)
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}
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}
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if len(candidates) > 0 {
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break
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}
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}
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if len(candidates) == 0 && la.ExpiresAt.After(now) {
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lac.logger.Debug("no new comments found", zap.String("live_activity#apns_token", at))
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return
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}
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sort.Slice(candidates, func(i, j int) bool {
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return candidates[i].Score > candidates[j].Score
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})
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din := DynamicIslandNotification{
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PostCommentCount: tr.Post.NumComments,
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PostScore: tr.Post.Score,
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}
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if len(candidates) > 0 {
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comment := candidates[0]
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din.CommentID = comment.ID
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din.CommentAuthor = comment.Author
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din.CommentBody = comment.Body
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din.CommentAge = comment.CreatedAt.Unix()
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din.CommentScore = comment.Score
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}
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ev := "update"
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if la.ExpiresAt.Before(now) {
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ev = "end"
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}
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bb, _ := json.Marshal(map[string]interface{}{
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"aps": map[string]interface{}{
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"timestamp": time.Now().Unix(),
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"event": ev,
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"content-state": din,
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},
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})
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notification := &apns2.Notification{
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DeviceToken: la.APNSToken,
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Topic: "com.christianselig.Apollo.push-type.liveactivity",
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PushType: "liveactivity",
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Payload: bb,
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}
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res, err := lac.apns.PushWithContext(ctx, notification)
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if err != nil {
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_ = lac.statsd.Incr("apns.live_activities.errors", []string{}, 1)
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lac.logger.Error("failed to send notification",
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zap.Error(err),
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zap.String("live_activity#apns_token", at),
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zap.Bool("live_activity#sandbox", la.Sandbox),
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zap.String("notification#type", ev),
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)
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_ = lac.liveActivityRepo.Delete(ctx, at)
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} else if !res.Sent() {
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_ = lac.statsd.Incr("apns.live_activities.errors", []string{}, 1)
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lac.logger.Error("notification not sent",
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zap.String("live_activity#apns_token", at),
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zap.Bool("live_activity#sandbox", la.Sandbox),
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zap.String("notification#type", ev),
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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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_ = lac.liveActivityRepo.Delete(ctx, at)
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} else {
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_ = lac.statsd.Incr("apns.notification.sent", []string{}, 1)
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lac.logger.Info("sent notification",
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zap.String("live_activity#apns_token", at),
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zap.Bool("live_activity#sandbox", la.Sandbox),
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zap.String("notification#type", ev),
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)
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}
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if la.ExpiresAt.Before(now) {
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lac.logger.Debug("live activity expired, deleting", zap.String("live_activity#apns_token", at))
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_ = lac.liveActivityRepo.Delete(ctx, at)
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}
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lac.logger.Debug("finishing job",
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zap.String("live_activity#apns_token", at),
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)
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}
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