cacert-boardvoting/cmd/boardvoting/jobs.go

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/*
Copyright 2017-2022 CAcert Inc.
SPDX-License-Identifier: Apache-2.0
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package main
import (
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"context"
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"log"
"time"
"git.cacert.org/cacert-boardvoting/internal/models"
)
type Job interface {
Schedule()
Run()
Stop()
}
type RemindVotersJob struct {
infoLog, errorLog *log.Logger
timer *time.Timer
voters *models.UserModel
decisions *models.MotionModel
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notify chan NotificationMail
reschedule chan Job
}
func (r *RemindVotersJob) Schedule() {
const reminderDays = 3
year, month, day := time.Now().UTC().Date()
nextExecution := time.Date(
year, month, day, 0, 0, 0, 0, time.UTC,
).AddDate(0, 0, reminderDays)
r.infoLog.Printf("scheduling RemindVotersJob for %s", nextExecution)
when := time.Until(nextExecution)
if r.timer != nil {
r.timer.Reset(when)
return
}
r.timer = time.AfterFunc(when, r.Run)
}
func (r *RemindVotersJob) Run() {
r.infoLog.Print("running RemindVotersJob")
defer func(r *RemindVotersJob) { r.reschedule <- r }(r)
var (
voters []*models.User
decisions []*models.Motion
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err error
)
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ctx := context.Background()
voters, err = r.voters.GetReminderVoters(ctx)
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if err != nil {
r.errorLog.Printf("problem getting voters: %v", err)
return
}
for _, voter := range voters {
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v := voter
decisions, err = r.decisions.UnVotedDecisionsForVoter(ctx, v)
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if err != nil {
r.errorLog.Printf("problem getting unvoted decisions: %v", err)
return
}
if len(decisions) > 0 {
r.notify <- &RemindVoterNotification{voter: voter, decisions: decisions}
}
}
}
func (r *RemindVotersJob) Stop() {
if r.timer != nil {
r.timer.Stop()
r.timer = nil
}
}
func (app *application) NewRemindVotersJob(
rescheduleChannel chan Job,
) Job {
return &RemindVotersJob{
infoLog: app.infoLog,
errorLog: app.errorLog,
voters: app.users,
decisions: app.motions,
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reschedule: rescheduleChannel,
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notify: app.mailNotifier.notifyChannel,
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}
}
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type CloseDecisionsJob struct {
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timer *time.Timer
infoLog *log.Logger
errorLog *log.Logger
decisions *models.MotionModel
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reschedule chan Job
notify chan NotificationMail
}
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func (c *CloseDecisionsJob) Schedule() {
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var (
nextDue *time.Time
err error
)
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ctx := context.Background()
nextDue, err = c.decisions.NextPendingDecisionDue(ctx)
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if err != nil {
c.errorLog.Printf("could not get next pending due date")
c.Stop()
return
}
if nextDue == nil {
c.infoLog.Printf("no next planned execution of CloseDecisionsJob")
c.Stop()
return
}
c.infoLog.Printf("scheduling CloseDecisionsJob for %s", nextDue)
when := time.Until(nextDue.Add(time.Second))
if c.timer == nil {
c.timer = time.AfterFunc(when, c.Run)
return
}
c.timer.Reset(when)
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}
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func (c *CloseDecisionsJob) Run() {
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c.infoLog.Printf("running CloseDecisionsJob")
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results, err := c.decisions.CloseDecisions(context.Background())
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if err != nil {
c.errorLog.Printf("closing decisions failed: %v", err)
}
for _, res := range results {
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c.notify <- &ClosedDecisionNotification{Decision: res}
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}
c.reschedule <- c
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}
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func (c *CloseDecisionsJob) Stop() {
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if c.timer != nil {
c.timer.Stop()
c.timer = nil
}
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}
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func (app *application) NewCloseDecisionsJob(
rescheduleChannel chan Job,
) Job {
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return &CloseDecisionsJob{
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infoLog: app.infoLog,
errorLog: app.errorLog,
decisions: app.motions,
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reschedule: rescheduleChannel,
notify: app.mailNotifier.notifyChannel,
}
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}
type JobScheduler struct {
infoLogger *log.Logger
errorLogger *log.Logger
jobs []Job
rescheduleChannel chan Job
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quitChannel chan struct{}
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}
func (app *application) NewJobScheduler() {
rescheduleChannel := make(chan Job, 1)
app.jobScheduler = &JobScheduler{
infoLogger: app.infoLog,
errorLogger: app.errorLog,
jobs: make([]Job, 0, 2),
rescheduleChannel: rescheduleChannel,
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quitChannel: make(chan struct{}),
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}
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app.jobScheduler.addJob(app.NewCloseDecisionsJob(rescheduleChannel))
app.jobScheduler.addJob(app.NewRemindVotersJob(rescheduleChannel))
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}
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func (js *JobScheduler) Schedule() {
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for _, job := range js.jobs {
job.Schedule()
}
for {
select {
case job := <-js.rescheduleChannel:
job.Schedule()
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case <-js.quitChannel:
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for _, job := range js.jobs {
job.Stop()
}
js.infoLogger.Print("stop job scheduler")
return
}
}
}
func (js *JobScheduler) addJob(job Job) {
js.jobs = append(js.jobs, job)
}
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func (js *JobScheduler) Quit() {
js.quitChannel <- struct{}{}
}