feat: WGRplane Hybrid - Go-native with nftables + Multi-Webhook

app/email.go

@@ -0,0 +1,134 @@
+package main
+
+import (
+	"bytes"
+	"fmt"
+	"net/smtp"
+	"text/template"
+
+	"github.com/jordan-wright/email"
+	"gorm.io/gorm"
+)
+
+type EmailTemplate struct {
+	Subject string
+	Body    string
+}
+
+var emailTemplates = map[string]EmailTemplate{
+	"peer_created": {
+		Subject: "New Peer Created: {{.Peer.IP}}",
+		Body:    "Peer {{.Peer.IP}} was created on server {{.Server.Name}}.\nPublic Key: {{.Peer.PublicKey}}",
+	},
+	"peer_deleted": {
+		Subject: "Peer Deleted: {{.Peer.IP}}",
+		Body:    "Peer {{.Peer.IP}} was deleted from server {{.Server.Name}}.",
+	},
+	"policy_changed": {
+		Subject: "Policy Updated for {{.Peer.IP}}",
+		Body:    "Policy updated for peer {{.Peer.IP}} on server {{.Server.Name}}.\nChanges: {{range .Policy.Changes}}{{.}} {{end}}",
+	},
+}
+
+func GetSMTPSettings() (settings SMTPSettings, err error) {
+	err = db.First(&settings).Error
+	if err == gorm.ErrRecordNotFound {
+		return SMTPSettings{}, nil
+	}
+	return
+}
+
+func SaveSMTPSettings(settings SMTPSettings) error {
+	var existing SMTPSettings
+	if err := db.First(&existing).Error; err == gorm.ErrRecordNotFound {
+		return db.Create(&settings).Error
+	}
+	return db.Model(&existing).Updates(settings).Error
+}
+
+func SendEmail(to, templateName string, data map[string]interface{}) error {
+	settings, err := GetSMTPSettings()
+	if err != nil {
+		return err
+	}
+	if !settings.Enabled {
+		return fmt.Errorf("SMTP is disabled")
+	}
+	
+	template, ok := emailTemplates[templateName]
+	if !ok {
+		return fmt.Errorf("template %s not found", templateName)
+	}
+	
+	subject, err := renderTemplate(template.Subject, data)
+	if err != nil {
+		return err
+	}
+	body, err := renderTemplate(template.Body, data)
+	if err != nil {
+		return err
+	}
+	
+	e := email.NewEmail()
+	e.From = fmt.Sprintf("%s <%s>", settings.FromName, settings.FromEmail)
+	e.To = []string{to}
+	e.Subject = subject
+	e.Text = []byte(body)
+	
+	addr := fmt.Sprintf("%s:%d", settings.Server, settings.Port)
+	if settings.UseAuth {
+		return e.Send(addr, smtp.PlainAuth("", settings.Username, settings.Password, settings.Server))
+	}
+	return e.Send(addr, nil)
+}
+
+func TestSMTP(settings SMTPSettings) error {
+	e := email.NewEmail()
+	e.From = fmt.Sprintf("%s <%s>", settings.FromName, settings.FromEmail)
+	e.To = []string{settings.FromEmail}
+	e.Subject = "WGRplane SMTP Test"
+	e.Text = []byte("This is a test email from WGRplane.")
+	
+	addr := fmt.Sprintf("%s:%d", settings.Server, settings.Port)
+	if settings.UseAuth {
+		return e.Send(addr, smtp.PlainAuth("", settings.Username, settings.Password, settings.Server))
+	}
+	return e.Send(addr, nil)
+}
+
+func renderTemplate(tmpl string, data map[string]interface{}) (string, error) {
+	t, err := template.New("email").Parse(tmpl)
+	if err != nil {
+		return "", err
+	}
+	var buf bytes.Buffer
+	if err := t.Execute(&buf, data); err != nil {
+		return "", err
+	}
+	return buf.String(), nil
+}
+
+func NotifyPeerCreated(server *Server, peer *Peer) error {
+	data := map[string]interface{}{
+		"Server": server,
+		"Peer":   peer,
+	}
+	return SendEmail(server.Endpoint, "peer_created", data)
+}
+
+func NotifyPeerDeleted(server *Server, peer *Peer) error {
+	data := map[string]interface{}{
+		"Server": server,
+		"Peer":   peer,
+	}
+	return SendEmail(server.Endpoint, "peer_deleted", data)
+}
+
+func NotifyPolicyChanged(server *Server, peer *Peer, changes []string) error {
+	data := map[string]interface{}{
+		"Server": server,
+		"Peer":   peer,
+		"Policy": Policy{Action: "updated", Changes: changes},
+	}
+	return SendEmail(server.Endpoint, "policy_changed", data)
+}