Installing a mailer package and setting up a mail channel

cmd/web/main.go

@@ -33,7 +33,10 @@ func main() {
 		log.Fatal(err)
 	}
 	defer db.SQL.Close()
+	defer close(app.MailChan)
 
+	fmt.Println("Starting mail listener...")
+	listenForMail()
 	fmt.Printf("Starting application on port %s\n", portNumber)
 
 	srv := &http.Server{
@@ -52,6 +55,17 @@ func run() (*driver.DB, error) {
 	gob.Register(models.Room{})
 	gob.Register(models.Restriction{})
 
+	mailChan := make(chan models.MailData)
+	app.MailChan = mailChan
+
+	msg := models.MailData{
+		To:      "John@do.do",
+		From:    "me@here.com",
+		Subject: "mail",
+		Content: "Hello, <strong>world</strong>",
+	}
+	app.MailChan <- msg
+
 	// change this to true when in production
 	app.InProduction = false
 

cmd/web/send-mail.go

@@ -0,0 +1,43 @@
+package main
+
+import (
+	"go-udemy-web-1/internal/models"
+	"log"
+	"time"
+
+	mail "github.com/xhit/go-simple-mail"
+)
+
+func listenForMail() {
+	go func() {
+		for {
+			msg := <-app.MailChan
+			sendMsg(msg)
+		}
+	}()
+}
+
+func sendMsg(m models.MailData) {
+	server := mail.NewSMTPClient()
+	server.Host = "localhost"
+	server.Port = 1025 // fake port
+	server.KeepAlive = false
+	server.ConnectTimeout = 10 * time.Second
+	server.SendTimeout = 10 * time.Second
+
+	client, err := server.Connect()
+	if err != nil {
+		errorLog.Println(err)
+	}
+
+	email := mail.NewMSG()
+	email.SetFrom(m.From).AddTo(m.To).SetSubject(m.Subject)
+	email.SetBody(mail.TextHTML, m.Content)
+
+	err = email.Send(client)
+	if err != nil {
+		log.Println(err)
+	} else {
+		log.Println("Email sent")
+	}
+}