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Sending invoice mails with attachement

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vinchent
2024-08-27 13:28:11 +02:00
parent 491f482fc7
commit 9b31ff0bbb
5 changed files with 133 additions and 18 deletions
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18
cmd/micro/invoice/email-templates/invoice.html.gohtml Normal file
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@ -0,0 +1,18 @@
{{ define "body" }}
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body>
<p>Hello:</p>
<p>Please find your invoice attached.</p>
<p>
--
<br>
Widget Co.
</p>
</body>
</html>
{{ end }}

9
cmd/micro/invoice/email-templates/invoice.plain.gohtml Normal file
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@ -0,0 +1,9 @@
{{ define "body" }}
Hello:
Please find your invoice attached.
--
Widget Co.
{{ end }}

34
cmd/micro/invoice/invoice-handlers.go
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@ -24,30 +24,30 @@ func (app *application) CreateAndSendInvoice(w http.ResponseWriter, r *http.Requ
// receive json
var order Order
order.ID = 100
order.Email = "me@here.com"
order.FirstName = "John"
order.LastName = "Smith"
order.Quantity = 1
order.Amount = 1000
order.Product = "Widget"
order.CreatedAt = time.Now()
// err = app.readJSON(w, r, &order)
// if err != nil {
// app.badRequest(w, r, err)
// return
// }
// generate a pdf invoice
err := app.createInvoicePDF(order)
err := app.readJSON(w, r, &order)
if err != nil {
app.badRequest(w, r, err)
return
}
// create mail
// generate a pdf invoice
err = app.createInvoicePDF(order)
if err != nil {
app.badRequest(w, r, err)
return
}
// create mail attachment
attachments := []string{
fmt.Sprintf("./invoices/%d.pdf", order.ID),
}
// send mail with attachment
err = app.SendMail("info@widgets.com", order.Email, "Your invoice", "invoice", attachments, nil)
if err != nil {
app.badRequest(w, r, err)
return
}
// send response
var resp JSONResponse

2
cmd/micro/invoice/invoice-routes.go
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@ -18,6 +18,6 @@ func (app *application) routes() http.Handler {
MaxAge: 300,
}))
mux.Get("/invoice/create-and-send", app.CreateAndSendInvoice)
mux.Post("/invoice/create-and-send", app.CreateAndSendInvoice)
return mux
}

88
cmd/micro/invoice/mailer.go Normal file
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@ -0,0 +1,88 @@
package main
import (
"bytes"
"embed"
"fmt"
"text/template"
"time"
mail "github.com/xhit/go-simple-mail/v2"
)
//go:embed email-templates
var emailTemplateFS embed.FS
func (app *application) SendMail(
from, to, subject, tmpl string,
attachments []string,
data interface{},
) error {
templateToRender := fmt.Sprintf("email-templates/%s.html.gohtml", tmpl)
t, err := template.New("email-html").ParseFS(emailTemplateFS, templateToRender)
if err != nil {
app.errorLog.Println(err)
return err
}
var tpl bytes.Buffer
if err = t.ExecuteTemplate(&tpl, "body", data); err != nil {
app.errorLog.Println(err)
return err
}
formattedMessage := tpl.String()
templateToRender = fmt.Sprintf("email-templates/%s.plain.gohtml", tmpl)
t, err = template.New("email-plain").ParseFS(emailTemplateFS, templateToRender)
if err != nil {
app.errorLog.Println(err)
return err
}
if err = t.ExecuteTemplate(&tpl, "body", data); err != nil {
app.errorLog.Println(err)
return err
}
plainMessage := tpl.String()
app.infoLog.Println(formattedMessage, plainMessage)
// send the mail
server := mail.NewSMTPClient()
server.Host = app.config.smtp.host
server.Port = app.config.smtp.port
// NOTE: not needed for MailHog
// server.Username = app.config.smtp.username
// server.Password = app.config.smtp.password
// server.Encryption = mail.EncryptionTLS
server.KeepAlive = false
server.ConnectTimeout = 10 * time.Second
server.SendTimeout = 10 * time.Second
smtpClient, err := server.Connect()
if err != nil {
return err
}
email := mail.NewMSG()
email.SetFrom(from).AddTo(to).SetSubject(subject)
email.SetBody(mail.TextHTML, formattedMessage)
email.AddAlternative(mail.TextPlain, plainMessage)
if len(attachments) > 0 {
for _, x := range attachments {
email.AddAttachment(x)
}
}
err = email.Send(smtpClient)
if err != nil {
app.errorLog.Println(err)
return err
}
app.infoLog.Println("send mail")
return nil
}