add mailer

go.mod

@@ -11,6 +11,7 @@ require (
 	github.com/gin-gonic/autotls v0.0.3
 	github.com/gin-gonic/gin v1.7.2
 	github.com/go-gormigrate/gormigrate/v2 v2.0.0
+	github.com/go-mail/mail v2.3.1+incompatible
 	github.com/google/uuid v1.2.0
 	github.com/kylelemons/godebug v1.1.0 // indirect
 	github.com/naoina/go-stringutil v0.1.0 // indirect
@@ -19,6 +20,8 @@ require (
 	github.com/stretchr/testify v1.7.0
 	golang.org/x/crypto v0.0.0-20210513164829-c07d793c2f9a
 	golang.org/x/time v0.0.0-20210220033141-f8bda1e9f3ba
+	gopkg.in/alexcesaro/quotedprintable.v3 v3.0.0-20150716171945-2caba252f4dc // indirect
+	gopkg.in/mail.v2 v2.3.1 // indirect
 	gorm.io/driver/postgres v1.1.0
 	gorm.io/gorm v1.21.10
 	gorm.io/plugin/prometheus v0.0.0-20210507023802-dc84a49b85d1

go.sum

@@ -96,6 +96,8 @@ github.com/go-kit/kit v0.10.0/go.mod h1:xUsJbQ/Fp4kEt7AFgCuvyX4a71u8h9jB8tj/ORgO
 github.com/go-logfmt/logfmt v0.3.0/go.mod h1:Qt1PoO58o5twSAckw1HlFXLmHsOX5/0LbT9GBnD5lWE=
 github.com/go-logfmt/logfmt v0.4.0/go.mod h1:3RMwSq7FuexP4Kalkev3ejPJsZTpXXBr9+V4qmtdjCk=
 github.com/go-logfmt/logfmt v0.5.0/go.mod h1:wCYkCAKZfumFQihp8CzCvQ3paCTfi41vtzG1KdI/P7A=
+github.com/go-mail/mail v2.3.1+incompatible h1:UzNOn0k5lpfVtO31cK3hn6I4VEVGhe3lX8AJBAxXExM=
+github.com/go-mail/mail v2.3.1+incompatible/go.mod h1:VPWjmmNyRsWXQZHVHT3g0YbIINUkSmuKOiLIDkWbL6M=
 github.com/go-playground/assert/v2 v2.0.1 h1:MsBgLAaY856+nPRTKrp3/OZK38U/wa0CcBYNjji3q3A=
 github.com/go-playground/assert/v2 v2.0.1/go.mod h1:VDjEfimB/XKnb+ZQfWdccd7VUvScMdVu0Titje2rxJ4=
 github.com/go-playground/locales v0.12.1/go.mod h1:IUMDtCfWo/w/mtMfIE/IG2K+Ey3ygWanZIBtBW0W2TM=
@@ -604,6 +606,8 @@ google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzi
 google.golang.org/protobuf v1.23.0 h1:4MY060fB1DLGMB/7MBTLnwQUY6+F09GEiz6SsrNqyzM=
 google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
+gopkg.in/alexcesaro/quotedprintable.v3 v3.0.0-20150716171945-2caba252f4dc h1:2gGKlE2+asNV9m7xrywl36YYNnBG5ZQ0r/BOOxqPpmk=
+gopkg.in/alexcesaro/quotedprintable.v3 v3.0.0-20150716171945-2caba252f4dc/go.mod h1:m7x9LTH6d71AHyAX77c9yqWCCa3UKHcVEj9y7hAtKDk=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
@@ -615,6 +619,8 @@ gopkg.in/gcfg.v1 v1.2.3/go.mod h1:yesOnuUOFQAhST5vPY4nbZsb/huCgGGXlipJsBn0b3o=
 gopkg.in/go-playground/assert.v1 v1.2.1/go.mod h1:9RXL0bg/zibRAgZUYszZSwO/z8Y/a8bDuhia5mkpMnE=
 gopkg.in/go-playground/validator.v9 v9.29.1/go.mod h1:+c9/zcJMFNgbLvly1L1V+PpxWdVbfP1avr/N00E2vyQ=
 gopkg.in/inconshreveable/log15.v2 v2.0.0-20180818164646-67afb5ed74ec/go.mod h1:aPpfJ7XW+gOuirDoZ8gHhLh3kZ1B08FtV2bbmy7Jv3s=
+gopkg.in/mail.v2 v2.3.1 h1:WYFn/oANrAGP2C0dcV6/pbkPzv8yGzqTjPmTeO7qoXk=
+gopkg.in/mail.v2 v2.3.1/go.mod h1:htwXN1Qh09vZJ1NVKxQqHPBaCBbzKhp5GzuJEA4VJWw=
 gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
 gopkg.in/warnings.v0 v0.1.2/go.mod h1:jksf8JmL6Qr/oQM2OXTHunEvvTAsrWBLb6OOjuVWRNI=

mailer/main.go

@@ -0,0 +1,33 @@
+package mailer
+
+import (
+	"github.com/go-mail/mail"
+)
+
+// Service to send mail
+type Service struct {
+	SMTPHost     string       `toml:"smtp_host"`
+	SMTPPort     int          `toml:"smtp_port"`
+	SMTPUsername string       `toml:"smtp_username"`
+	SMTPPassword string       `toml:"smtp_password"`
+	SMTPSSL      bool         `toml:"smtp_ssl"`
+	Dailer       *mail.Dialer `toml:"-"`
+	From         string       `toml:"from"`
+}
+
+// Ping mailer
+func (m *Service) Ping() error {
+	conn, err := m.Dailer.Dial()
+	if err != nil {
+		return err
+	}
+	// do not run in timeout or reconnect errors
+	return conn.Close()
+}
+
+// Setup dailer (and ping)
+func (m *Service) Setup() error {
+	m.Dailer = mail.NewDialer(m.SMTPHost, m.SMTPPort, m.SMTPUsername, m.SMTPPassword)
+	m.Dailer.SSL = m.SMTPSSL
+	return m.Ping()
+}

mailer/main_test.go

@@ -0,0 +1 @@
+package mailer

mailer/template.go

@@ -0,0 +1,50 @@
+package mailer
+
+import (
+	"bytes"
+	hTemplate "html/template"
+	"text/template"
+)
+
+// Renderer for easy template of TXT or HTML
+type Renderer struct {
+	tmpl  *template.Template
+	hTmpl *hTemplate.Template
+}
+
+// TemplateTXT - create template render
+func TemplateTXT(temp string) *Renderer {
+	tmpl, err := template.New("").Parse(temp)
+	if err != nil {
+		return nil
+	}
+	return &Renderer{
+		tmpl: tmpl,
+	}
+}
+
+// TemplateHTML - create template render for html
+func TemplateHTML(temp string) *Renderer {
+	tmpl, err := hTemplate.New("").Parse(temp)
+	if err != nil {
+		return nil
+	}
+	return &Renderer{
+		hTmpl: tmpl,
+	}
+}
+
+// Render template
+func (r *Renderer) Render(data interface{}) string {
+	var buf bytes.Buffer
+	if r.hTmpl != nil {
+		if err := r.hTmpl.Execute(&buf, data); err != nil {
+			return ""
+		}
+	} else {
+		if err := r.tmpl.Execute(&buf, data); err != nil {
+			return ""
+		}
+	}
+	return string(buf.Bytes())
+}

web/main.go

@@ -3,10 +3,12 @@ package web
 import (
 	"github.com/bdlm/log"
 	"github.com/gin-gonic/gin"
-	"gorm.io/gorm"
 	// acme
 	"github.com/gin-gonic/autotls"
 	"golang.org/x/crypto/acme/autocert"
+	// internal
+	"dev.sum7.eu/genofire/golang-lib/mailer"
+	"gorm.io/gorm"
 )
 
 // Service to store Configuration and Webserver wide objects
@@ -27,6 +29,7 @@ type Service struct {
 	} `toml:"session"`
 	// internal
 	DB     *gorm.DB        `toml:"-"`
+	Mailer *mailer.Service `toml:"-"`
 }
 
 // Run to startup all related web parts