generated from OtusGolang/home_work
/
event.go
82 lines (68 loc) · 1.94 KB
/
event.go
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package storage
import (
"fmt"
"github.com/ezhk/golang-learning/banners-rotation/internal/core"
"github.com/ezhk/golang-learning/banners-rotation/internal/exceptions"
"github.com/ezhk/golang-learning/banners-rotation/internal/structs"
)
func (s *Storage) ProcessBannerEvent(id uint64, event string) error {
manyBannersPlacements, err := s.ReadBannersPlacements(structs.BannerFilter{"id": id})
if err != nil {
return err
}
if len(manyBannersPlacements) < 1 {
return exceptions.ErrObjectNotExist
}
bannerPlacement := manyBannersPlacements[0]
switch event {
case "show":
bannerPlacement.Shows++
case "click":
bannerPlacement.Clicks++
}
_, err = s.UpdateBannerPlacement(*bannerPlacement)
if err != nil {
return err
}
// TODO: too heavy logic, move it to background
err = s.RecalculateBannersScore(structs.BannerFilter{"slot_id": bannerPlacement.SlotID, "group_id": bannerPlacement.GroupID})
if err != nil {
return err
}
return nil
}
func (s *Storage) RecalculateBannersScore(filter structs.BannerFilter) error {
// Prepare summary stats in memory.
showsInMemory := make(map[string]int64)
shows, err := s.ReadBannersShows(filter)
if err != nil {
return err
}
for _, rec := range shows {
key := fmt.Sprintf("%d-%d", rec.SlotID, rec.GroupID)
showsInMemory[key] = rec.SummaryShows
}
// Update banners stats.
manyBannersPlacements, err := s.ReadBannersPlacements(filter)
if err != nil {
return err
}
for _, bannerPlacement := range manyBannersPlacements {
key := fmt.Sprintf("%d-%d", bannerPlacement.SlotID, bannerPlacement.GroupID)
sum, ok := showsInMemory[key]
if !ok {
return exceptions.ErrKeyNotExist
}
val, err := core.Score(bannerPlacement.Clicks, bannerPlacement.Shows, sum)
if err != nil {
// Skip current store value, but process another banners.
continue
}
bannerPlacement.Score = val
_, err = s.UpdateBannerPlacement(*bannerPlacement)
if err != nil {
return err
}
}
return nil
}