feat: implement data retention mechanism

config.default.yml

@@ -15,9 +15,11 @@ app:
   aggregation_time: '0 15 2 * * *'                          # time at which to run daily aggregation batch jobs
   leaderboard_generation_time: '0 0 6 * * *,0 0 18 * * *'   # times at which to re-calculate the leaderboard
   report_time_weekly: '0 0 18 * * 5'                        # time at which to fan out weekly reports (extended cron)
+  data_cleanup_time: '0 0 6 * * 7'                          # time at which to run old data cleanup (if enabled through data_retention_months)
   inactive_days: 7                                          # time of previous days within a user must have logged in to be considered active
   import_batch_size: 50                                     # maximum number of heartbeats to insert into the database within one transaction
   heartbeat_max_age: '4320h'                                # maximum acceptable age of a heartbeat (see https://pkg.go.dev/time#ParseDuration)
+  data_retention_months: -1                                 # maximum retention period on months for user data (heartbeats) (-1 for infinity)
   custom_languages:
     vue: Vue
     jsx: JSX

config/config.go

@@ -68,14 +68,16 @@ var cFlag = flag.String("config", defaultConfigPath, "config file location")
 var env string
 
 type appConfig struct {
-	AggregationTime           string                       `yaml:"aggregation_time" default:"02:15" env:"WAKAPI_AGGREGATION_TIME"`
-	LeaderboardGenerationTime string                       `yaml:"leaderboard_generation_time" default:"06:00;18:00" env:"WAKAPI_LEADERBOARD_GENERATION_TIME"`
-	ReportTimeWeekly          string                       `yaml:"report_time_weekly" default:"fri,18:00" env:"WAKAPI_REPORT_TIME_WEEKLY"`
+	AggregationTime           string                       `yaml:"aggregation_time" default:"0 15 2 * * *" env:"WAKAPI_AGGREGATION_TIME"`
+	LeaderboardGenerationTime string                       `yaml:"leaderboard_generation_time" default:"0 0 6 * * *,0 0 18 * * *" env:"WAKAPI_LEADERBOARD_GENERATION_TIME"`
+	ReportTimeWeekly          string                       `yaml:"report_time_weekly" default:"0 0 18 * * 5" env:"WAKAPI_REPORT_TIME_WEEKLY"`
+	DataCleanupTime           string                       `yaml:"data_cleanup_time" default:"0 0 6 * * 7" env:"WAKAPI_DATA_CLEANUP_TIME"`
 	ImportBackoffMin          int                          `yaml:"import_backoff_min" default:"5" env:"WAKAPI_IMPORT_BACKOFF_MIN"`
 	ImportBatchSize           int                          `yaml:"import_batch_size" default:"50" env:"WAKAPI_IMPORT_BATCH_SIZE"`
 	InactiveDays              int                          `yaml:"inactive_days" default:"7" env:"WAKAPI_INACTIVE_DAYS"`
 	HeartbeatMaxAge           string                       `yaml:"heartbeat_max_age" default:"4320h" env:"WAKAPI_HEARTBEAT_MAX_AGE"`
 	CountCacheTTLMin          int                          `yaml:"count_cache_ttl_min" default:"30" env:"WAKAPI_COUNT_CACHE_TTL_MIN"`
+	DataRetentionMonths       int                          `yaml:"data_retention_months" default:"-1" env:"WAKAPI_DATA_RETENTION_MONTHS"`
 	AvatarURLTemplate         string                       `yaml:"avatar_url_template" default:"api/avatar/{username_hash}.svg" env:"WAKAPI_AVATAR_URL_TEMPLATE"`
 	CustomLanguages           map[string]string            `yaml:"custom_languages"`
 	Colors                    map[string]map[string]string `yaml:"-"`
@@ -442,6 +444,12 @@ func Load(version string) *Config {
 		initSentry(config.Sentry, config.IsDev())
 	}
 
+	if config.App.DataRetentionMonths <= 0 {
+		logbuch.Info("disabling data retention policy, keeping data forever")
+	} else {
+		logbuch.Info("data retention policy set to keep data for %d months at max", config.App.DataRetentionMonths)
+	}
+
 	// some validation checks
 	if config.Server.ListenIpV4 == "" && config.Server.ListenIpV6 == "" && config.Server.ListenSocket == "" {
 		logbuch.Fatal("either of listen_ipv4 or listen_ipv6 or listen_socket must be set")

config/jobqueue.go

@@ -12,10 +12,11 @@ var jobQueues map[string]*artifex.Dispatcher
 var jobCounts map[string]int
 
 const (
-	QueueDefault    = "wakapi.default"
-	QueueProcessing = "wakapi.processing"
-	QueueReports    = "wakapi.reports"
-	QueueImports    = "wakapi.imports"
+	QueueDefault      = "wakapi.default"
+	QueueProcessing   = "wakapi.processing"
+	QueueReports      = "wakapi.reports"
+	QueueImports      = "wakapi.imports"
+	QueueHousekeeping = "wakapi.housekeeping"
 )
 
 type JobQueueMetrics struct {
@@ -28,9 +29,10 @@ func init() {
 	jobQueues = make(map[string]*artifex.Dispatcher)
 
 	InitQueue(QueueDefault, 1)
-	InitQueue(QueueProcessing, int(math.Ceil(float64(runtime.NumCPU())/2.0)))
+	InitQueue(QueueProcessing, halfCPUs())
 	InitQueue(QueueReports, 1)
 	InitQueue(QueueImports, 1)
+	InitQueue(QueueHousekeeping, halfCPUs())
 }
 
 func InitQueue(name string, workers int) error {
@@ -71,3 +73,11 @@ func CloseQueues() {
 		q.Stop()
 	}
 }
+
+func allCPUs() int {
+	return runtime.NumCPU()
+}
+
+func halfCPUs() int {
+	return int(math.Ceil(float64(runtime.NumCPU()) / 2.0))
+}

main.go

@@ -81,6 +81,7 @@ var (
 	keyValueService        services.IKeyValueService
 	reportService          services.IReportService
 	diagnosticsService     services.IDiagnosticsService
+	housekeepingService    services.IHousekeepingService
 	miscService            services.IMiscService
 )
 
@@ -182,12 +183,14 @@ func main() {
 	keyValueService = services.NewKeyValueService(keyValueRepository)
 	reportService = services.NewReportService(summaryService, userService, mailService)
 	diagnosticsService = services.NewDiagnosticsService(diagnosticsRepository)
+	housekeepingService = services.NewHousekeepingService(userService, heartbeatService, summaryService)
 	miscService = services.NewMiscService(userService, summaryService, keyValueService)
 
 	// Schedule background tasks
 	go aggregationService.Schedule()
 	go leaderboardService.Schedule()
 	go reportService.Schedule()
+	go housekeepingService.Schedule()
 	go miscService.ScheduleCountTotalTime()
 
 	routes.Init()

mocks/heartbeat_service.go

@@ -10,13 +10,13 @@ type HeartbeatServiceMock struct {
 	mock.Mock
 }
 
-func (m *HeartbeatServiceMock) Insert(heartbeat *models.Heartbeat) error {
-	args := m.Called(heartbeat)
+func (m *HeartbeatServiceMock) Insert(h *models.Heartbeat) error {
+	args := m.Called(h)
 	return args.Error(0)
 }
 
-func (m *HeartbeatServiceMock) InsertBatch(heartbeats []*models.Heartbeat) error {
-	args := m.Called(heartbeats)
+func (m *HeartbeatServiceMock) InsertBatch(h []*models.Heartbeat) error {
+	args := m.Called(h)
 	return args.Error(0)
 }
 
@@ -74,3 +74,8 @@ func (m *HeartbeatServiceMock) DeleteByUser(u *models.User) error {
 	args := m.Called(u)
 	return args.Error(0)
 }
+
+func (m *HeartbeatServiceMock) DeleteByUserBefore(u *models.User, t time.Time) error {
+	args := m.Called(u, t)
+	return args.Error(0)
+}

mocks/summary_repository.go

@@ -10,8 +10,8 @@ type SummaryRepositoryMock struct {
 	mock.Mock
 }
 
-func (m *SummaryRepositoryMock) Insert(summary *models.Summary) error {
-	args := m.Called(summary)
+func (m *SummaryRepositoryMock) Insert(s *models.Summary) error {
+	args := m.Called(s)
 	return args.Error(0)
 }
 
@@ -20,8 +20,8 @@ func (m *SummaryRepositoryMock) GetAll() ([]*models.Summary, error) {
 	return args.Get(0).([]*models.Summary), args.Error(1)
 }
 
-func (m *SummaryRepositoryMock) GetByUserWithin(user *models.User, time time.Time, time2 time.Time) ([]*models.Summary, error) {
-	args := m.Called(user, time, time2)
+func (m *SummaryRepositoryMock) GetByUserWithin(u *models.User, t1 time.Time, t2 time.Time) ([]*models.Summary, error) {
+	args := m.Called(u, t1, t2)
 	return args.Get(0).([]*models.Summary), args.Error(1)
 }
 
@@ -34,3 +34,8 @@ func (m *SummaryRepositoryMock) DeleteByUser(s string) error {
 	args := m.Called(s)
 	return args.Error(0)
 }
+
+func (m *SummaryRepositoryMock) DeleteByUserBefore(s string, t time.Time) error {
+	args := m.Called(s, t)
+	return args.Error(0)
+}

repositories/heartbeat.go

@@ -170,7 +170,7 @@ func (r *HeartbeatRepository) CountByUsers(users []*models.User) ([]*models.Coun
 	return counts, nil
 }
 
-func (r HeartbeatRepository) GetEntitySetByUser(entityType uint8, user *models.User) ([]string, error) {
+func (r *HeartbeatRepository) GetEntitySetByUser(entityType uint8, user *models.User) ([]string, error) {
 	var results []string
 	if err := r.db.
 		Model(&models.Heartbeat{}).
@@ -199,3 +199,13 @@ func (r *HeartbeatRepository) DeleteByUser(user *models.User) error {
 	}
 	return nil
 }
+
+func (r *HeartbeatRepository) DeleteByUserBefore(user *models.User, t time.Time) error {
+	if err := r.db.
+		Where("user_id = ?", user.ID).
+		Where("time <= ?", t.Local()).
+		Delete(models.Heartbeat{}).Error; err != nil {
+		return err
+	}
+	return nil
+}

repositories/repositories.go

@@ -31,6 +31,7 @@ type IHeartbeatRepository interface {
 	GetEntitySetByUser(uint8, *models.User) ([]string, error)
 	DeleteBefore(time.Time) error
 	DeleteByUser(*models.User) error
+	DeleteByUserBefore(*models.User, time.Time) error
 }
 
 type IDiagnosticsRepository interface {
@@ -66,6 +67,7 @@ type ISummaryRepository interface {
 	GetByUserWithin(*models.User, time.Time, time.Time) ([]*models.Summary, error)
 	GetLastByUser() ([]*models.TimeByUser, error)
 	DeleteByUser(string) error
+	DeleteByUserBefore(string, time.Time) error
 }
 
 type IUserRepository interface {

repositories/summary.go

@@ -86,6 +86,16 @@ func (r *SummaryRepository) DeleteByUser(userId string) error {
 	return nil
 }
 
+func (r *SummaryRepository) DeleteByUserBefore(userId string, t time.Time) error {
+	if err := r.db.
+		Where("user_id = ?", userId).
+		Where("to_time <= ?", t.Local()).
+		Delete(models.Summary{}).Error; err != nil {
+		return err
+	}
+	return nil
+}
+
 // inplace
 func (r *SummaryRepository) populateItems(summaries []*models.Summary, conditions []clause.Interface) error {
 	var items []*models.SummaryItem

routes/settings.go

@@ -657,12 +657,12 @@ func (h *SettingsHandler) validateWakatimeKey(apiKey string, baseUrl string) boo
 func (h *SettingsHandler) regenerateSummaries(user *models.User) error {
 	logbuch.Info("clearing summaries for user '%s'", user.ID)
 	if err := h.summarySrvc.DeleteByUser(user.ID); err != nil {
-		logbuch.Error("failed to clear summaries: %v", err)
+		conf.Log().Error("failed to clear summaries: %v", err)
 		return err
 	}
 
 	if err := h.aggregationSrvc.AggregateSummaries(datastructure.NewSet(user.ID)); err != nil {
-		logbuch.Error("failed to regenerate summaries: %v", err)
+		conf.Log().Error("failed to regenerate summaries: %v", err)
 		return err
 	}
 

services/heartbeat.go

@@ -192,6 +192,11 @@ func (srv *HeartbeatService) DeleteByUser(user *models.User) error {
 	return srv.repository.DeleteByUser(user)
 }
 
+func (srv *HeartbeatService) DeleteByUserBefore(user *models.User, t time.Time) error {
+	go srv.cache.Flush()
+	return srv.repository.DeleteByUserBefore(user, t)
+}
+
 func (srv *HeartbeatService) augmented(heartbeats []*models.Heartbeat, userId string) ([]*models.Heartbeat, error) {
 	languageMapping, err := srv.languageMappingSrvc.ResolveByUser(userId)
 	if err != nil {

services/housekeeping.go

@@ -0,0 +1,81 @@
+package services
+
+import (
+	"github.com/emvi/logbuch"
+	"github.com/muety/artifex/v2"
+	"github.com/muety/wakapi/config"
+	"github.com/muety/wakapi/models"
+	"time"
+)
+
+type HousekeepingService struct {
+	config        *config.Config
+	userSrvc      IUserService
+	heartbeatSrvc IHeartbeatService
+	summarySrvc   ISummaryService
+	queueDefault  *artifex.Dispatcher
+	queueWorkers  *artifex.Dispatcher
+}
+
+func NewHousekeepingService(userService IUserService, heartbeatService IHeartbeatService, summaryService ISummaryService) *HousekeepingService {
+	return &HousekeepingService{
+		config:        config.Get(),
+		userSrvc:      userService,
+		heartbeatSrvc: heartbeatService,
+		summarySrvc:   summaryService,
+		queueDefault:  config.GetDefaultQueue(),
+		queueWorkers:  config.GetQueue(config.QueueHousekeeping),
+	}
+}
+
+func (s *HousekeepingService) Schedule() {
+	if s.config.App.DataRetentionMonths <= 0 {
+		return
+	}
+
+	logbuch.Info("scheduling data cleanup")
+
+	// this is not exactly precise, because of summer / winter time, etc.
+	retentionDuration := time.Now().Sub(time.Now().AddDate(0, -s.config.App.DataRetentionMonths, 0))
+
+	_, err := s.queueDefault.DispatchCron(func() {
+		// fetch all users
+		users, err := s.userSrvc.GetAll()
+		if err != nil {
+			config.Log().Error("failed to get users for data cleanup, %v", err)
+			return
+		}
+
+		// schedule jobs
+		for _, u := range users {
+			user := *u
+			s.queueWorkers.Dispatch(func() {
+				if err := s.ClearOldUserData(&user, retentionDuration); err != nil {
+					config.Log().Error("failed to clear old user data for '%s'", user.ID)
+				}
+			})
+		}
+	}, s.config.App.DataCleanupTime)
+
+	if err != nil {
+		config.Log().Error("failed to dispatch data cleanup jobs, %v", err)
+	}
+}
+
+func (s *HousekeepingService) ClearOldUserData(user *models.User, maxAge time.Duration) error {
+	before := time.Now().Add(-maxAge)
+	logbuch.Warn("cleaning up user data for '%s' older than %v", user.ID, before)
+
+	// clear old heartbeats
+	if err := s.heartbeatSrvc.DeleteByUserBefore(user, before); err != nil {
+		return err
+	}
+
+	// clear old summaries
+	logbuch.Info("clearing summaries for user '%s' older than %v", user.ID, before)
+	if err := s.summarySrvc.DeleteByUserBefore(user.ID, before); err != nil {
+		return err
+	}
+
+	return nil
+}

services/services.go

@@ -42,6 +42,7 @@ type IHeartbeatService interface {
 	GetEntitySetByUser(uint8, *models.User) ([]string, error)
 	DeleteBefore(time.Time) error
 	DeleteByUser(*models.User) error
+	DeleteByUserBefore(*models.User, time.Time) error
 }
 
 type IDiagnosticsService interface {
@@ -89,6 +90,7 @@ type ISummaryService interface {
 	Summarize(time.Time, time.Time, *models.User, *models.Filters) (*models.Summary, error)
 	GetLatestByUser() ([]*models.TimeByUser, error)
 	DeleteByUser(string) error
+	DeleteByUserBefore(string, time.Time) error
 	Insert(*models.Summary) error
 }
 
@@ -97,6 +99,11 @@ type IReportService interface {
 	SendReport(*models.User, time.Duration) error
 }
 
+type IHousekeepingService interface {
+	Schedule()
+	ClearOldUserData(*models.User, time.Duration) error
+}
+
 type ILeaderboardService interface {
 	Schedule()
 	ComputeLeaderboard([]*models.User, *models.IntervalKey, []uint8) error

services/summary.go

@@ -208,6 +208,11 @@ func (srv *SummaryService) DeleteByUser(userId string) error {
 	return srv.repository.DeleteByUser(userId)
 }
 
+func (srv *SummaryService) DeleteByUserBefore(userId string, t time.Time) error {
+	srv.invalidateUserCache(userId)
+	return srv.repository.DeleteByUserBefore(userId, t)
+}
+
 func (srv *SummaryService) Insert(summary *models.Summary) error {
 	srv.invalidateUserCache(summary.UserID)
 	return srv.repository.Insert(summary)