Now renders a .md file to use as the text and HTML versions of emails.

common/email/api.go

@@ -6,17 +6,14 @@ import (
   "context"
   "log"
   "github.com/redis/go-redis/v9"
-  "github.com/gofiber/template/html/v2"
+  "github.com/yuin/goldmark"
   "MY/webapp/config"
+  "path/filepath"
+  "text/template"
+  "os"
   "strings"
 )
 
-var HTMLTemplates *html.Engine
-
-func init() {
-  HTMLTemplates = html.New("./emails", ".html")
-}
-
 func NewSender(ctx context.Context) (Sender){
   client := redis.NewClient(&redis.Options{
     Addr: config.Settings.Redis.HostPort,
@@ -55,6 +52,33 @@ func (sender *Sender) Close() {
   sender.redis_client.Close()
 }
 
+func (router *Router) Render(tmpl_path string, data any) (string, string, error) {
+  tmpl_path = filepath.Join(config.Settings.Email.Templates, tmpl_path)
+
+  // load the markdown file
+  md_file, err := os.ReadFile(tmpl_path)
+  if err != nil { return "", "", err }
+
+  // template it
+  tmpl, err := template.New(tmpl_path).Parse(string(md_file))
+  if err != nil { return "", "", err }
+
+  out := new(strings.Builder)
+  err = tmpl.Execute(out, data)
+  if err != nil { return "", "",  err }
+  text_out := out.String()
+
+  // convert to html
+  out.Reset()
+  err = goldmark.Convert([]byte(text_out), out)
+  if err != nil { return "", "", err }
+
+  html_out := out.String()
+
+  // return the template .md as plain text and .html as html
+  return string(text_out), string(html_out), nil
+}
+
 func (router *Router) DeliverEmail(msg EmailMessage) error {
   email_msg := mail.NewMsg()
   err := email_msg.From(msg.From)
@@ -65,10 +89,6 @@ func (router *Router) DeliverEmail(msg EmailMessage) error {
 
   email_msg.Subject(msg.Subject)
 
-  out := new(strings.Builder)
-  err = HTMLTemplates.Render(out, msg.HTMLTemplate, msg.Data)
-  email_msg.SetBodyString(mail.TypeTextHTML, out.String())
-
   if config.Settings.Email.XMailer != "" {
     email_msg.SetGenHeader(mail.HeaderXMailer, config.Settings.Email.XMailer)
   }
@@ -77,8 +97,12 @@ func (router *Router) DeliverEmail(msg EmailMessage) error {
     email_msg.SetGenHeader(mail.HeaderUserAgent, config.Settings.Email.UserAgent)
   }
 
+  text, html, err := router.Render(msg.Template, nil)
   if err != nil { return err }
 
+  email_msg.SetBodyString(mail.TypeTextHTML, html)
+  email_msg.AddAlternativeString(mail.TypeTextPlain, text)
+
   err = router.smtp_client.DialAndSendWithContext(router.ctx, email_msg)
   if err != nil { return err }
 

common/email/data.go

@@ -4,15 +4,15 @@ import (
   "github.com/redis/go-redis/v9"
   "github.com/wneessen/go-mail"
   "context"
+
 )
 
 type EmailMessage struct {
   To string
   From string
   Subject string
+  Template string
   Data any
-  TextTemplate string
-  HTMLTemplate string
 }
 
 type Sender struct {
@@ -24,5 +24,6 @@ type Router struct {
   redis_client *redis.Client
   smtp_client *mail.Client
   ctx context.Context
+
 }
 

config/settings.go

@@ -28,6 +28,7 @@ type config struct {
     XMailer string
     UserAgent string
     RedisQueue string
+    Templates string
   }
 }
 

config_example.json

@@ -19,6 +19,7 @@
     "Port": 1025,
     "XMailer": "nunya-business",
     "UserAgent": "nunya-business",
-    "RedisQueue": "email"
+    "RedisQueue": "email",
+    "Templates": "emails"
   }
 }

emails/signup.html

@@ -1,3 +0,0 @@
-<h1>Welcome!</h1>
-
-<p>You signed up!</p>

emails/signup.md

@@ -0,0 +1,4 @@
+Welcome
+=======
+
+Welcome to my website!

features/email/api.go

@@ -11,8 +11,7 @@ func PostApiEmailSend(c *fiber.Ctx) error {
     To: c.FormValue("To"),
     From: c.FormValue("From"),
     Subject: c.FormValue("Subject"),
-    TextTemplate: c.FormValue("Template"),
+    Template: c.FormValue("Template"),
-    HTMLTemplate: c.FormValue("Template"),
   })
 
   return c.Redirect("/email/")

tools/cmd/qmgr/main.go

@@ -15,8 +15,7 @@ func main() {
     To: "tina.recip@example.com",
     From: "toni.sender@example.com",
     Subject: "This is my first mail.",
-    TextTemplate: "signup",
+    Template: "signup",
-    HTMLTemplate: "signup",
   }
 
   sender := email.NewSender(ctx)