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remind.go
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remind.go
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package runner
import (
"fmt"
"log"
"time"
"github.com/nlopes/slack"
"github.com/quintilesims/slackbot/db"
"github.com/quintilesims/slackbot/models"
"github.com/quintilesims/slackbot/utils"
)
// InterviewReminders will be send out 1 hour before the interview
const InterviewReminderLead = time.Hour
// NewReminderRunner will return a runner that will send reminders to slack users.
// Each time the runner executes, it will read from the store and
func NewReminderRunner(store db.Store, client utils.SlackClient) *Runner {
timers := []*time.Timer{}
return &Runner{
Name: "Remind",
run: func() error {
interviewTimers, err := getInterviewTimers(store, client)
if err != nil {
return err
}
// stop all of our timers before overwriting them
for i := 0; i < len(timers); i++ {
timers[i].Stop()
}
timers = interviewTimers
return nil
},
}
}
func getInterviewTimers(store db.Store, client utils.SlackClient) ([]*time.Timer, error) {
interviews := models.Interviews{}
if err := store.Read(db.InterviewsKey, &interviews); err != nil {
return nil, err
}
timers := []*time.Timer{}
for i := 0; i < len(interviews); i++ {
interview := interviews[i]
d := interview.Time.UTC().Sub(time.Now().UTC())
if d < InterviewReminderLead {
continue
}
timer := time.AfterFunc(d, func() {
for _, interviewerID := range interview.InterviewerIDs {
text := fmt.Sprintf("Hi <@%s>! Just reminding you that ", interviewerID)
text += fmt.Sprintf("you have an interview with *%s* ", interview.Candidate)
text += fmt.Sprintf(" at %s", interview.Time.In(time.Local).Format("03:04:05PM"))
if _, _, _, err := client.SendMessage(interviewerID, slack.MsgOptionText(text, true)); err != nil {
log.Printf("[ERROR] [Reminder] %v", err)
}
}
})
timers = append(timers, timer)
}
return timers, nil
}