add: adding mailer functionality.

.gitignore

@@ -23,4 +23,6 @@ tmp/
 # Go workspace file
 go.work
 # Config files for localhost
-config/local.json
+local.json
+prod.json
+

config/local.json

@@ -8,6 +8,14 @@
     "useCDN": false,
     "hostname": "localhost"
   },
+  "mailer": {
+    "smtpHost": "",
+    "smtpPort": "",
+    "emailId": "",
+    "bccEmailId": "",
+    "username": "",
+    "password": ""
+  },
   "database": {
     "type": "postgres",
     "host": "127.0.0.1",

config/prod.json

@@ -2,12 +2,20 @@
   "environment": "local",
   "appConfig": {
     "debug": false,
-    "secretKey": "APP_SECRET_KEY",
+    "secretKey": "$APP_SECRET_KEY",
     "defaultPort": "8080",
     "customPort": "",
     "useCDN": false,
     "hostname": "pinmyblogs.com"
   },
+  "mailer": {
+    "smtpHost": "",
+    "smtpPort": "",
+    "emailId": "",
+    "bccEmailId": "",
+    "username": "",
+    "password": ""
+  },
   "database": {
     "type": "postgres",
     "username": "username",

go.mod

@@ -66,6 +66,8 @@ require (
 	golang.org/x/sys v0.19.0 // indirect
 	golang.org/x/text v0.14.0 // indirect
 	google.golang.org/protobuf v1.33.0 // indirect
+	gopkg.in/alexcesaro/quotedprintable.v3 v3.0.0-20150716171945-2caba252f4dc // indirect
+	gopkg.in/gomail.v2 v2.0.0-20160411212932-81ebce5c23df // indirect
 	gopkg.in/ini.v1 v1.67.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -312,11 +312,15 @@ golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8T
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 google.golang.org/protobuf v1.33.0 h1:uNO2rsAINq/JlFpSdYEKIZ0uKD/R9cpdv0T+yoGwGmI=
 google.golang.org/protobuf v1.33.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
+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 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
 gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
+gopkg.in/gomail.v2 v2.0.0-20160411212932-81ebce5c23df h1:n7WqCuqOuCbNr617RXOY0AWRXxgwEyPp2z+p0+hgMuE=
+gopkg.in/gomail.v2 v2.0.0-20160411212932-81ebce5c23df/go.mod h1:LRQQ+SO6ZHR7tOkpBDuZnXENFzX8qRjMDMyPD6BRkCw=
 gopkg.in/inconshreveable/log15.v2 v2.0.0-20180818164646-67afb5ed74ec/go.mod h1:aPpfJ7XW+gOuirDoZ8gHhLh3kZ1B08FtV2bbmy7Jv3s=
 gopkg.in/ini.v1 v1.67.0 h1:Dgnx+6+nfE+IfzjUEISNeydPJh9AXNNsWbGP9KzCsOA=
 gopkg.in/ini.v1 v1.67.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=

internal/signup/service.go

@@ -2,6 +2,7 @@ package signup
 
 import (
 	"errors"
+
 	"github.com/gin-gonic/gin"
 	"github.com/puni9869/pinmyblogs/models"
 	"github.com/puni9869/pinmyblogs/pkg/mailer"

pkg/config/config.go

@@ -2,12 +2,15 @@ package config
 
 import (
 	"errors"
+
 	"github.com/spf13/viper"
 )
 
 var (
 	defaultEnv   = "local"
 	defaultPath  = "./config"
+	LocalEnv     = "local"
+	ProdEnv      = "prod"
 	environments = []string{"local", "prod"}
 )
 
@@ -37,12 +40,22 @@ type Authentication struct {
 	EnableRegistration bool `json:"enableRegistration"`
 }
 
+type Mailer struct {
+	SmtpHost   string `json:"smtpHost"`
+	SmtpPort   int    `json:"smtpPort"`
+	EmailId    string `json:"emailId"`
+	BccEmailId string `json:"bccEmailId"`
+	Username   string `json:"username"`
+	Password   string `json:"password"`
+}
+
 // ConfigProvider ie converted value in go types
 type ConfigProvider struct {
 	EnableSSL      bool           `json:"enableSSL"`
 	Database       Database       `json:"database"`
 	AppConfig      AppConfig      `json:"appConfig"`
 	Authentication Authentication `json:"authentication"`
+	Mailer         Mailer         `json:"mailer"`
 }
 
 var C ConfigProvider

pkg/mailer/registration_mailer.go

@@ -1,9 +1,13 @@
 package mailer
 
 import (
+	"fmt"
+
 	"github.com/puni9869/pinmyblogs/models"
+	"github.com/puni9869/pinmyblogs/pkg/config"
 	"github.com/puni9869/pinmyblogs/pkg/logger"
 	"github.com/sirupsen/logrus"
+	"gopkg.in/gomail.v2"
 )
 
 type UserRegister struct {
@@ -13,11 +17,50 @@ type UserRegister struct {
 }
 
 func (u *UserRegister) Send() {
+	if config.GetEnv() != config.LocalEnv {
+		u.log.WithFields(map[string]any{
+			"user": u.user.Email,
+			"id":   u.user.ID,
+			"env":  config.GetEnv(),
+		}).Info("user registration confirmation mail sent")
+		return
+	}
+	tmpl := fmt.Sprintf(`<!DOCTYPE>
+	<html>
+	<body>
+       Hi there, welcome to pinmyblogs.
+	   We have successfully registered the user with email: %s<br/>
+       <br/>
+       Regards,
+		<br/>
+       pinmyblogs and team
+	</body>
+	</html>
+	`, u.user.Email)
+
+	msg := gomail.NewMessage()
+	msg.SetHeader("From", config.C.Mailer.EmailId)
+	msg.SetHeader("To", u.user.Email)
+	msg.SetHeader("Bcc", config.C.Mailer.BccEmailId)
+	msg.SetHeader("Subject", "Welcome to pinmyblogs.com")
+	msg.SetBody("text/html", tmpl)
+
+	m := gomail.NewDialer(
+		config.C.Mailer.SmtpHost,
+		config.C.Mailer.SmtpPort,
+		config.C.Mailer.Username,
+		config.C.Mailer.Password,
+	)
+
+	if err := m.DialAndSend(msg); err != nil {
+		u.log.WithError(err).Error("error sending email")
+		return
+	}
 	u.log.WithFields(map[string]any{
 		"user": u.user.Email,
 		"id":   u.user.ID,
+		"env":  config.GetEnv(),
 	}).Info("user registration confirmation mail sent")
-
 }
 
 func NewUserRegisterMailer(user models.User) MailerAPI {

templates/mailer/user_registered.html

@@ -0,0 +1,2 @@
+{{define "mailer/user_registered"}}
+{{end}}