flamenco/internal/manager/persistence/worker_sleep_schedule.go
Sybren A. Stüvel 83467e4c60 Sleep schedule: store 'next check' timestamp in UTC
SQLite doesn't parse the timezone info, so timestamps should always be in
UTC.
2022-07-18 19:30:17 +02:00

122 lines
3.5 KiB
Go

package persistence
// SPDX-License-Identifier: GPL-3.0-or-later
import (
"context"
"fmt"
"time"
"github.com/rs/zerolog/log"
"gorm.io/gorm/clause"
)
// SleepSchedule belongs to a Worker, and determines when it's automatically
// sent to the 'asleep' and 'awake' states.
type SleepSchedule struct {
Model
WorkerID uint `gorm:"default:0;unique;index"`
Worker *Worker `gorm:"foreignkey:WorkerID;references:ID;constraint:OnDelete:CASCADE"`
IsActive bool `gorm:"default:false;index"`
// Space-separated two-letter strings indicating days of week the schedule is
// active ("mo", "tu", etc.). Empty means "every day".
DaysOfWeek string `gorm:"default:''"`
StartTime TimeOfDay `gorm:"default:''"`
EndTime TimeOfDay `gorm:"default:''"`
NextCheck time.Time
}
// FetchWorkerSleepSchedule fetches the worker's sleep schedule.
// It does not fetch the worker itself. If you need that, call
// `FetchSleepScheduleWorker()` afterwards.
func (db *DB) FetchWorkerSleepSchedule(ctx context.Context, workerUUID string) (*SleepSchedule, error) {
logger := log.With().Str("worker", workerUUID).Logger()
logger.Trace().Msg("fetching worker sleep schedule")
var sched SleepSchedule
tx := db.gormDB.WithContext(ctx).
Joins("inner join workers on workers.id = sleep_schedules.worker_id").
Where("workers.uuid = ?", workerUUID).
// This is the same as First(&sched), except it doesn't cause an error if it doesn't exist:
Limit(1).Find(&sched)
if tx.Error != nil {
return nil, tx.Error
}
if sched.ID == 0 {
return nil, nil
}
return &sched, nil
}
func (db *DB) SetWorkerSleepSchedule(ctx context.Context, workerUUID string, schedule *SleepSchedule) error {
logger := log.With().Str("worker", workerUUID).Logger()
logger.Trace().Msg("setting worker sleep schedule")
worker, err := db.FetchWorker(ctx, workerUUID)
if err != nil {
return fmt.Errorf("fetching worker %q: %w", workerUUID, err)
}
schedule.WorkerID = worker.ID
schedule.Worker = worker
// Only store timestamps in UTC.
if schedule.NextCheck.Location() != time.UTC {
schedule.NextCheck = schedule.NextCheck.UTC()
}
tx := db.gormDB.WithContext(ctx).
Clauses(clause.OnConflict{
Columns: []clause.Column{{Name: "worker_id"}},
UpdateAll: true,
}).
Create(&schedule)
return tx.Error
}
func (db *DB) SetWorkerSleepScheduleNextCheck(ctx context.Context, schedule *SleepSchedule) error {
// Only store timestamps in UTC.
if schedule.NextCheck.Location() != time.UTC {
schedule.NextCheck = schedule.NextCheck.UTC()
}
tx := db.gormDB.WithContext(ctx).
Select("next_check").
Updates(schedule)
return tx.Error
}
// FetchSleepScheduleWorker sets the given schedule's `Worker` pointer.
func (db *DB) FetchSleepScheduleWorker(ctx context.Context, schedule *SleepSchedule) error {
var worker Worker
tx := db.gormDB.WithContext(ctx).First(&worker, schedule.WorkerID)
if tx.Error != nil {
return workerError(tx.Error, "finding worker by their sleep schedule")
}
schedule.Worker = &worker
return nil
}
// FetchSleepSchedulesToCheck returns the sleep schedules that are due for a check.
func (db *DB) FetchSleepSchedulesToCheck(ctx context.Context) ([]*SleepSchedule, error) {
now := db.gormDB.NowFunc()
log.Debug().
Str("timeout", now.String()).
Msg("fetching sleep schedules that need checking")
schedules := []*SleepSchedule{}
tx := db.gormDB.WithContext(ctx).
Model(&SleepSchedule{}).
Where("is_active = ?", true).
Where("next_check <= ? or next_check is NULL or next_check = ''", now).
Scan(&schedules)
if tx.Error != nil {
return nil, tx.Error
}
return schedules, nil
}