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wakapi/models/heartbeat.go
2021-01-31 18:06:20 +01:00

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package models
import (
"fmt"
"github.com/emvi/logbuch"
"github.com/mitchellh/hashstructure/v2"
"regexp"
"time"
)
type Heartbeat struct {
ID uint `gorm:"primary_key"`
User *User `json:"-" gorm:"not null; constraint:OnUpdate:CASCADE,OnDelete:CASCADE;"`
UserID string `json:"-" gorm:"not null; index:idx_time_user"`
Entity string `json:"entity" gorm:"not null; index:idx_entity"`
Type string `json:"type"`
Category string `json:"category"`
Project string `json:"project"`
Branch string `json:"branch"`
Language string `json:"language" gorm:"index:idx_language"`
IsWrite bool `json:"is_write"`
Editor string `json:"editor"`
OperatingSystem string `json:"operating_system"`
Machine string `json:"machine"`
Time CustomTime `json:"time" gorm:"type:timestamp; default:CURRENT_TIMESTAMP; index:idx_time,idx_time_user"`
Hash string `json:"-" gorm:"type:varchar(17); uniqueIndex"`
languageRegex *regexp.Regexp
}
func (h *Heartbeat) Valid() bool {
return h.User != nil && h.UserID != "" && h.User.ID == h.UserID && h.Time != CustomTime(time.Time{})
}
func (h *Heartbeat) Augment(languageMappings map[string]string) {
if h.languageRegex == nil {
h.languageRegex = regexp.MustCompile(`^.+\.(.+)$`)
}
groups := h.languageRegex.FindAllStringSubmatch(h.Entity, -1)
if len(groups) == 0 || len(groups[0]) != 2 {
return
}
ending := groups[0][1]
if _, ok := languageMappings[ending]; !ok {
return
}
h.Language, _ = languageMappings[ending]
}
func (h *Heartbeat) GetKey(t uint8) (key string) {
switch t {
case SummaryProject:
key = h.Project
case SummaryEditor:
key = h.Editor
case SummaryLanguage:
key = h.Language
case SummaryOS:
key = h.OperatingSystem
case SummaryMachine:
key = h.Machine
}
if key == "" {
key = UnknownSummaryKey
}
return key
}
func (h *Heartbeat) String() string {
return fmt.Sprintf(
"Heartbeat {user=%s, entity=%s, type=%s, category=%s, project=%s, branch=%s, language=%s, iswrite=%v, editor=%s, os=%s, machine=%s, time=%d}",
h.UserID,
h.Entity,
h.Type,
h.Category,
h.Project,
h.Branch,
h.Language,
h.IsWrite,
h.Editor,
h.OperatingSystem,
h.Machine,
(time.Time(h.Time)).UnixNano(),
)
}
// Hash is used to prevent duplicate heartbeats
// Using a UNIQUE INDEX over all relevant columns would be more straightforward,
// whereas manually computing this kind of hash is quite cumbersome. However,
// such a unique index would, according to https://stackoverflow.com/q/65980064/3112139,
// essentially double the space required for heartbeats, so we decided to go this way.
func (h *Heartbeat) Hashed() *Heartbeat {
hash, err := hashstructure.Hash(h.String(), hashstructure.FormatV2, nil)
if err != nil {
logbuch.Error("CRITICAL ERROR: failed to hash struct %v", err)
}
h.Hash = fmt.Sprintf("%x", hash) // "uint64 values with high bit set are not supported"
return h
}