btc-pay-checker/internal/services/mail/mail.go

package mail

import (
	"strings"
	"time"

	"gitea.urkob.com/urko/btc-pay-checker/internal/services/mail/templates"
	"gitea.urkob.com/urko/emailsender/pkg/email"
)

const (
	mime        = "MIME-version: 1.0;\nContent-Type: text/html; charset=\"UTF-8\";\n\n"
	okSubject   = "BTC Pay Checker successful"
	failSubject = "BTC Pay Checker failed"
)

type MailService struct {
	emailSrv *email.EmailService
}

func NewMailService(emailSrv *email.EmailService) *MailService {
	return &MailService{
		emailSrv: emailSrv,
	}
}

type SendOK struct {
	Amount       float64
	ExplorerUrl  string
	Tx           string
	CustomerID   string
	OrderID      string
	Block        string
	Timestamp    time.Time
	To           string
	SupportEmail string
}

func (m *MailService) SendProviderConfirm(data SendOK) error {
	template := strings.Replace(templates.ProviderConfirm, "{{explorer_url}}", data.ExplorerUrl, -1)
	template = strings.Replace(template, "{{customer_id}}", data.CustomerID, -1)
	template = strings.Replace(template, "{{order_id}}", data.OrderID, -1)
	template = strings.Replace(template, "{{tx}}", data.Tx, -1)
	template = strings.Replace(template, "{{block}}", data.Block, -1)
	template = strings.Replace(template, "{{timestamp}}", data.Timestamp.Format(time.RFC3339), -1)

	return m.emailSrv.SendEmail(email.EmailMessage{
		To:      data.To,
		Subject: okSubject,
		Body:    template,
	})
}

func (m *MailService) SendClientConfirm(data SendOK) error {
	template := strings.Replace(templates.ClientConfirm, "{{explorer_url}}", data.ExplorerUrl, -1)
	template = strings.Replace(template, "{{customer_id}}", data.CustomerID, -1)
	template = strings.Replace(template, "{{order_id}}", data.OrderID, -1)
	template = strings.Replace(template, "{{tx}}", data.Tx, -1)
	template = strings.Replace(template, "{{block}}", data.Block, -1)
	template = strings.Replace(template, "{{timestamp}}", data.Timestamp.Format(time.RFC3339), -1)

	return m.emailSrv.SendEmail(email.EmailMessage{
		To:      data.To,
		Subject: okSubject,
		Body:    template,
	})
}

func (m *MailService) SendFail(data SendOK) error {
	template := strings.Replace(templates.Error, "{{explorer_url}}", data.ExplorerUrl, -1)
	template = strings.Replace(template, "{{tx_id}}", data.Tx, -1)
	template = strings.Replace(template, "{{block_hash}}", data.Block, -1)
	template = strings.Replace(template, "{{support_email}}", data.SupportEmail, -1)
	// TODO: Alert client too

	return m.emailSrv.SendEmail(email.EmailMessage{
		To:      data.To,
		Subject: failSubject,
		Body:    template,
	})
}