71 lines
1.5 KiB
Go
71 lines
1.5 KiB
Go
package app
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import (
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"errors"
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"fmt"
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"os"
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"time"
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"github.com/robfig/cron/v3"
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"go.balki.me/tss/log"
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"gopkg.in/yaml.v3"
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)
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type Scheduler interface {
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ShouldDownload(name string, scheduleSpec string) (bool, error)
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Save() error
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Good(name string)
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}
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type scheduler struct {
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filePath string
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lastSuccessTime map[string]time.Time
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}
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func NewScheduler(filePath string) (Scheduler, error) {
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s := scheduler{filePath: filePath, lastSuccessTime: map[string]time.Time{}}
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data, err := os.ReadFile(filePath)
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if err != nil {
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if !errors.Is(err, os.ErrNotExist) {
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return nil, err
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}
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f, err := os.Create(filePath)
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if err != nil {
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return nil, fmt.Errorf("path:%v does not exist and unable to create: err: %w", filePath, err)
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}
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f.Close()
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log.Info("scheduler file does not exist, will be created", "path", filePath)
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} else {
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err = yaml.Unmarshal(data, &s.lastSuccessTime)
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if err != nil {
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return nil, err
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}
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}
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return &s, nil
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}
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func (s *scheduler) Save() error {
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data, err := yaml.Marshal(&s.lastSuccessTime)
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if err != nil {
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return err
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}
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return os.WriteFile(s.filePath, data, 0644)
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}
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func (s *scheduler) Good(name string) {
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s.lastSuccessTime[name] = time.Now()
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}
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func (s *scheduler) ShouldDownload(name string, scheduleSpec string) (bool, error) {
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lastSuccess, ok := s.lastSuccessTime[name]
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if !ok {
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return true, nil
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}
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cron, err := cron.ParseStandard(scheduleSpec)
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if err != nil {
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return false, err
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}
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n := cron.Next(lastSuccess)
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return n.Before(time.Now()), nil
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}
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