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wakapi/services/duration.go

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package services
import (
"github.com/muety/wakapi/config"
"github.com/muety/wakapi/models"
"time"
)
const HeartbeatDiffThreshold = 2 * time.Minute
type DurationService struct {
config *config.Config
heartbeatService IHeartbeatService
}
func NewDurationService(heartbeatService IHeartbeatService) *DurationService {
srv := &DurationService{
config: config.Get(),
heartbeatService: heartbeatService,
}
return srv
}
func (srv *DurationService) Get(from, to time.Time, user *models.User) (models.Durations, error) {
heartbeats, err := srv.heartbeatService.GetAllWithin(from, to, user)
if err != nil {
return nil, err
}
// Aggregation
var count int
var latest *models.Duration
mapping := make(map[string][]*models.Duration)
for _, h := range heartbeats {
d1 := models.NewDurationFromHeartbeat(h)
if list, ok := mapping[d1.GroupHash]; !ok || len(list) < 1 {
mapping[d1.GroupHash] = []*models.Duration{d1}
}
if latest == nil {
latest = d1
continue
}
dur := d1.Time.T().Sub(latest.Time.T().Add(latest.Duration))
if dur > HeartbeatDiffThreshold {
dur = HeartbeatDiffThreshold
}
latest.Duration += dur
if dur >= HeartbeatDiffThreshold || latest.GroupHash != d1.GroupHash {
list := mapping[d1.GroupHash]
if d0 := list[len(list)-1]; d0 != d1 {
mapping[d1.GroupHash] = append(mapping[d1.GroupHash], d1)
}
latest = d1
}
count++
}
durations := make(models.Durations, 0, count)
for _, list := range mapping {
for _, d := range list {
if d.Duration == 0 {
d.Duration = HeartbeatDiffThreshold
}
durations = append(durations, d)
}
}
return durations.Sorted(), nil
}