123 lines
2.8 KiB
Go
123 lines
2.8 KiB
Go
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package alerting
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import (
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"context"
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"fmt"
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"sync"
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"time"
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cl "dynatron.me/x/stillbox/pkg/calls"
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"dynatron.me/x/stillbox/pkg/gordio/database"
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"dynatron.me/x/stillbox/internal/timeseries"
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"dynatron.me/x/stillbox/internal/trending"
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"github.com/rs/zerolog/log"
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)
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const (
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StorageLookbackDays = 2
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HalfLife = time.Hour
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RecentDuration = time.Hour
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)
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type AlertSink struct {
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sync.RWMutex
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scorer trending.Scorer[cl.Talkgroup]
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}
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func NewSink(ctx context.Context) *AlertSink {
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as := &AlertSink{
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scorer: trending.NewScorer[cl.Talkgroup](
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trending.WithTimeSeries(newTimeSeries),
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trending.WithStorageDuration[cl.Talkgroup](StorageLookbackDays*24*time.Hour),
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trending.WithRecentDuration[cl.Talkgroup](RecentDuration),
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trending.WithHalfLife[cl.Talkgroup](HalfLife),
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),
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}
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go as.startBackfill(ctx)
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return as
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}
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func (as *AlertSink) startBackfill(ctx context.Context) {
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since := time.Now().Add(StorageLookbackDays * -24 * time.Hour)
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log.Debug().Time("since", since).Msg("starting stats backfill")
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count, err := as.backfill(ctx, since)
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if err != nil {
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log.Error().Err(err).Msg("backfill failed")
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return
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}
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log.Debug().Int("count", count).Int("len", as.scorer.Score().Len()).Msg("backfill finished")
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as.printScores()
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}
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type score[K comparable] struct {
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ID K
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Score float64
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Probability float64
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Expectation float64
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Maximum float64
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KLScore float64
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}
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func (as *AlertSink) printScores() {
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scores := as.scorer.Score()
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fmt.Printf("score len is %d\n", scores.Len())
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for _, s := range scores {
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fmt.Printf("%d:%d score %f prob %f exp %f max %f kl %f", s.ID.System, s.ID.Talkgroup, s.Score,
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s.Probability, s.Expectation, s.Maximum, s.KLScore)
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}
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}
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func (as *AlertSink) backfill(ctx context.Context, since time.Time) (count int, err error) {
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db := database.FromCtx(ctx)
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const backfillStatsQuery = `SELECT system, talkgroup, call_date FROM calls WHERE call_date > $1`
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rows, err := db.Query(ctx, backfillStatsQuery, since)
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if err != nil {
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return count, err
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}
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defer rows.Close()
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as.Lock()
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defer as.Unlock()
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for rows.Next() {
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var tg cl.Talkgroup
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var callDate time.Time
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if err := rows.Scan(&tg.System, &tg.Talkgroup, &callDate); err != nil {
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return count, err
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}
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as.scorer.AddEvent(tg, callDate)
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count++
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}
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if err := rows.Err(); err != nil {
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return count, err
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}
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return count, nil
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}
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func newTimeSeries(id cl.Talkgroup) trending.TimeSeries {
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ts, _ := timeseries.NewTimeSeries(timeseries.WithGranularities(
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[]timeseries.Granularity{
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{Granularity: time.Second, Count: 60},
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{Granularity: time.Minute, Count: 10},
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{Granularity: time.Hour, Count: 24},
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{Granularity: time.Hour * 24, Count: StorageLookbackDays},
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},
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))
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return ts
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}
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func (as *AlertSink) SinkType() string {
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return "alerting"
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}
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func (ns *AlertSink) Call(ctx context.Context, call *cl.Call) error {
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return nil
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}
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