farmstar-survey-backend/internal/worker/sms.go

package worker

import (
	"context"

	"github.com/kamikazechaser/africastalking"
	"github.com/riverqueue/river"
)

type (
	SMSType string
	SMSArgs struct {
		SMS   SMSType `json:"SMS"`
		Phone string  `json:"phone"`
		Text  string  `json:"text"`
	}

	SMSWorker struct {
		river.WorkerDefaults[SMSArgs]

		AtClient *africastalking.AtClient
	}
)

const (
	FarmerRegistration      SMSType = "You have registered as a farmer for the FarmStar rewards program. Follow the link https://t.ly/Vin2T to complete your registration and receive FSP."
	DistributorRegistration SMSType = "You have registered as a distributor for the FarmStar rewards program. Follow the link https://t.ly/U7SbY to complete your registration."
	FarmerComplete          SMSType = "Thank you for completing the farmer survey, rewards will be sent soon. Use the link https://t.ly/2CxGt to record purchases of EverGrow Organic Fertilizer."
	DistributorComplete     SMSType = "Thank you for completing the distributor survey. Use the link https://t.ly/2CxGt to verify purchases of EverGrow Organic Fertilizer."
	PurchaseComplete        SMSType = "Thank you for completing the purchase survey."
)

func (SMSArgs) Kind() string {
	return "sms"
}

func (w *SMSWorker) Work(ctx context.Context, job *river.Job[SMSArgs]) error {
	var text string

	if job.Args.Text != "" {
		text = job.Args.Text
	} else {
		text = string(job.Args.SMS)
	}

	_, err := w.AtClient.SendBulkSMS(ctx, africastalking.BulkSMSInput{
		To:      []string{"+254" + job.Args.Phone[1:]},
		From:    "Sarafu",
		Message: text,
	})
	if err != nil {
		return err
	}

	return nil
}