initial commits 2

mailer.go

@@ -0,0 +1,183 @@
+// Copyright 2023 Harran Ali <harran.m@gmail.com>. All rights reserved.
+// Copyright (c) 2024 Zeni Kim <zenik@smarteching.com>
+// Use of this source code is governed by MIT-style
+// license that can be found in the LICENSE file.
+
+package core
+
+import (
+	"crypto/tls"
+	"fmt"
+	"net/mail"
+	"os"
+	"strconv"
+
+	"github.com/harranali/mailing"
+)
+
+type Mailer struct {
+	mailer     *mailing.Mailer
+	sender     mail.Address
+	receiver   mail.Address
+	cc         []mail.Address
+	bcc        []mail.Address
+	subject    string
+	htmlBody   string
+	plainText  string
+	attachment string
+}
+
+type EmailAddress struct {
+	Name    string // the name can be empty
+	Address string // ex: john@example.com
+}
+type EmailAttachment struct {
+	Name string // name of the file
+	Path string // full path to the file
+}
+
+func initiateMailerWithSMTP() *Mailer {
+	portStr := os.Getenv("SMTP_PORT")
+	if portStr == "" {
+		panic("error reading smtp port env var")
+	}
+	port, err := strconv.ParseInt(portStr, 10, 64)
+	if err != nil {
+		panic(fmt.Sprintf("error parsing smtp port env var: %v", err))
+	}
+	skipTlsVerifyStr := os.Getenv("SMTP_TLS_SKIP_VERIFY_HOST")
+	if skipTlsVerifyStr == "" {
+		panic("error reading smtp tls verify env var")
+	}
+	skipTlsVerify, err := strconv.ParseBool(skipTlsVerifyStr)
+	if err != nil {
+		panic(fmt.Sprintf("error parsing smtp tls verify env var: %v", err))
+	}
+
+	return &Mailer{
+		mailer: mailing.NewMailerWithSMTP(&mailing.SMTPConfig{
+			Host:     os.Getenv("SMTP_HOST"),
+			Port:     int(port),
+			Username: os.Getenv("SMTP_USERNAME"),
+			Password: os.Getenv("SMTP_PASSWORD"),
+			TLSConfig: tls.Config{
+				ServerName:         os.Getenv("SMTP_HOST"),
+				InsecureSkipVerify: skipTlsVerify,
+			},
+		}),
+	}
+
+}
+
+func initiateMailerWithSparkPost() *Mailer {
+	apiVersionStr := os.Getenv("SPARKPOST_API_VERSION")
+	if apiVersionStr == "" {
+		panic("error reading sparkpost base url env var")
+	}
+	apiVersion, err := strconv.ParseInt(apiVersionStr, 10, 64)
+	if err != nil {
+		panic(fmt.Sprintf("error parsing sparkpost base url env var: %v", apiVersion))
+	}
+	return &Mailer{
+		mailer: mailing.NewMailerWithSparkPost(&mailing.SparkPostConfig{
+			BaseUrl:    os.Getenv("SPARKPOST_BASE_URL"),
+			ApiKey:     os.Getenv("SPARKPOST_API_KEY"),
+			ApiVersion: int(apiVersion),
+		}),
+	}
+}
+
+func initiateMailerWithSendGrid() *Mailer {
+	return &Mailer{
+		mailer: mailing.NewMailerWithSendGrid(&mailing.SendGridConfig{
+			Host:     os.Getenv("SENDGRID_HOST"),
+			Endpoint: os.Getenv("SENDGRID_ENDPOINT"),
+			ApiKey:   os.Getenv("SENDGRID_API_KEY"),
+		}),
+	}
+}
+
+func initiateMailerWithMailGun() *Mailer {
+	skipTlsVerifyStr := os.Getenv("MAILGUN_TLS_SKIP_VERIFY_HOST")
+	if skipTlsVerifyStr == "" {
+		panic("error reading mailgun tls verify env var")
+	}
+	skipTlsVerify, err := strconv.ParseBool(skipTlsVerifyStr)
+	if err != nil {
+		panic(fmt.Sprintf("error parsing mailgun tls verify env var: %v", err))
+	}
+	return &Mailer{
+		mailer: mailing.NewMailerWithMailGun(&mailing.MailGunConfig{
+			Domain:              os.Getenv("MAILGUN_DOMAIN"),
+			APIKey:              os.Getenv("MAILGUN_API_KEY"),
+			SkipTLSVerification: skipTlsVerify,
+		}),
+	}
+}
+
+func (m *Mailer) SetFrom(emailAddresses EmailAddress) *Mailer {
+	e := mailing.EmailAddress{
+		Name:    emailAddresses.Name,
+		Address: emailAddresses.Address,
+	}
+	m.mailer.SetFrom(e)
+	return m
+}
+
+func (m *Mailer) SetTo(emailAddresses []EmailAddress) *Mailer {
+	var addressesList []mailing.EmailAddress
+	for _, v := range emailAddresses {
+		addressesList = append(addressesList, mailing.EmailAddress{Name: v.Name, Address: v.Address})
+	}
+
+	m.mailer.SetTo(addressesList)
+	return m
+}
+
+func (m *Mailer) SetCC(emailAddresses []EmailAddress) *Mailer {
+	var addressesList []mailing.EmailAddress
+	for _, v := range emailAddresses {
+		addressesList = append(addressesList, mailing.EmailAddress{Name: v.Name, Address: v.Address})
+	}
+
+	m.mailer.SetCC(addressesList)
+	return m
+}
+
+func (m *Mailer) SetBCC(emailAddresses []EmailAddress) *Mailer {
+	var addressesList []mailing.EmailAddress
+	for _, v := range emailAddresses {
+		addressesList = append(addressesList, mailing.EmailAddress{Name: v.Name, Address: v.Address})
+	}
+
+	m.mailer.SetBCC(addressesList)
+	return m
+}
+
+func (m *Mailer) SetSubject(subject string) *Mailer {
+	m.mailer.SetSubject(subject)
+	return m
+}
+
+func (m *Mailer) SetHTMLBody(body string) *Mailer {
+	m.mailer.SetHTMLBody(body)
+	return m
+}
+
+func (m *Mailer) SetPlainTextBody(body string) *Mailer {
+	m.mailer.SetPlainTextBody(body)
+	return m
+}
+
+func (m *Mailer) SetAttachments(attachments []EmailAttachment) *Mailer {
+	var aList []mailing.Attachment
+	for _, v := range attachments {
+		aList = append(aList, mailing.Attachment{Name: v.Name, Path: v.Path})
+	}
+	m.mailer.SetAttachments(aList)
+	return m
+}
+
+func (m *Mailer) Send() error {
+	return m.mailer.Send()
+}