better emails

controllers/authController.go

@@ -12,8 +12,6 @@ import (
 	"github.com/SowinskiBraeden/school-management-api/models"
 	"github.com/howeyc/gopass"
 
-	"net/smtp"
-
 	"github.com/dgrijalva/jwt-go"
 	"github.com/gofiber/fiber/v2"
 	"github.com/google/uuid"
@@ -207,11 +205,11 @@ func Enroll(c *fiber.Ctx) error {
 	student.AccountData.TempPassword = true
 
 	// Send student personal email temp password
-	message := []byte("Your temporary password is " + tempPass)
-	auth := smtp.PlainAuth("", systemEmail, systemPassword, "smtp.gmail.com")
+	subject := "Password Changed"
+	receiver := student.PersonalData.Email
+	r := NewRequest([]string{receiver}, subject)
 
-	err := smtp.SendMail("smtp.gmail.com:587", auth, systemEmail, []string{student.PersonalData.Email}, message)
-	if err != nil {
+	if err := r.Send("./templates/passwordChanged.html", map[string]string{"username": student.PersonalData.FirstName, "password": tempPass}); err {
 		cancel()
 		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{
 			"success": false,
@@ -342,15 +340,15 @@ func RegisterTeacher(c *fiber.Ctx) error {
 	teacher.AccountData.TempPassword = true
 
 	// Send teacher personal email temp password
-	message := []byte("Your temporary password is " + tempPass)
-	auth := smtp.PlainAuth("", systemEmail, systemPassword, "smtp.gmail.com")
+	subject := "Password Changed"
+	receiver := teacher.PersonalData.Email
+	r := NewRequest([]string{receiver}, subject)
 
-	err := smtp.SendMail("smtp.gmail.com:587", auth, systemEmail, []string{teacher.PersonalData.Email}, message)
-	if err != nil {
+	if err := r.Send("./templates/passwordChanged.html", map[string]string{"username": teacher.PersonalData.FirstName, "password": tempPass}); err {
 		cancel()
 		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{
 			"success": false,
-			"message": "Could not send password to teacners email",
+			"message": "Could not send password to teachers email",
 			"error":   err,
 		})
 	}
@@ -430,15 +428,15 @@ func CreateAdmin(c *fiber.Ctx) error {
 	admin.TempPassword = true
 
 	// Send admin personal email temp password
-	message := []byte("Your temporary password is " + tempPass)
-	auth := smtp.PlainAuth("", systemEmail, systemPassword, "smtp.gmail.com")
+	subject := "Password Changed"
+	receiver := admin.Email
+	r := NewRequest([]string{receiver}, subject)
 
-	err := smtp.SendMail("smtp.gmail.com:587", auth, systemEmail, []string{admin.Email}, message)
-	if err != nil {
+	if err := r.Send("./templates/passwordChanged.html", map[string]string{"username": admin.FirstName, "password": tempPass}); err {
 		cancel()
 		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{
 			"success": false,
-			"message": "Could not send password to admins email",
+			"message": "Could not send password to students email",
 			"error":   err,
 		})
 	}
@@ -537,6 +535,21 @@ func StudentLogin(c *fiber.Ctx) error {
 
 	if localAccountDisabled || student.AccountData.AccountDisabled {
 		cancel()
+
+		// Send student email warning of disabled account
+		subject := "Account Disabled"
+		receiver := student.PersonalData.Email
+		r := NewRequest([]string{receiver}, subject)
+
+		if err := r.Send("./templates/accountDisabled.html", map[string]string{"username": student.PersonalData.FirstName}); err {
+			cancel()
+			return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{
+				"success": false,
+				"message": "Could not send password to students email",
+				"error":   err,
+			})
+		}
+
 		return c.Status(fiber.StatusUnauthorized).JSON(fiber.Map{
 			"success": false,
 			"message": "Account is Disabled, contact an Admin",

controllers/mailerController.go

@@ -0,0 +1,79 @@
+package controllers
+
+import (
+	"bytes"
+	"fmt"
+	"html/template"
+	"log"
+	"net/smtp"
+	"os"
+)
+
+type Config struct {
+	Server   string
+	Port     int
+	Email    string
+	Password string
+}
+
+var config Config = Config{
+	Server:   "smtp.gmail.com",
+	Port:     587,
+	Email:    os.Getenv("SYSTEM_EMAIL"),
+	Password: os.Getenv("SYSTEM_PASSWORD"),
+}
+
+type Request struct {
+	from    string
+	to      []string
+	subject string
+	body    string
+}
+
+const (
+	MIME = "MIME-version: 1.0;\nContent-Type: text/html; charset=\"UTF-8\";\n\n"
+)
+
+func NewRequest(to []string, subject string) *Request {
+	return &Request{
+		to:      to,
+		subject: subject,
+	}
+}
+
+func (r *Request) parseTemplate(fileName string, data interface{}) error {
+	t, err := template.ParseFiles(fileName)
+	if err != nil {
+		return err
+	}
+	buffer := new(bytes.Buffer)
+	if err = t.Execute(buffer, data); err != nil {
+		return err
+	}
+	r.body = buffer.String()
+	return nil
+}
+
+func (r *Request) sendMail() bool {
+	body := "To: " + r.to[0] + "\r\nSubject: " + r.subject + "\r\n" + MIME + "\r\n" + r.body
+	SMTP := fmt.Sprintf("%s:%d", config.Server, config.Port)
+	if err := smtp.SendMail(SMTP, smtp.PlainAuth("", config.Email, config.Password, config.Server), config.Email, r.to, []byte(body)); err != nil {
+		return false
+	}
+	return true
+}
+
+func (r *Request) Send(templateName string, items interface{}) bool {
+	err := r.parseTemplate(templateName, items)
+	if err != nil {
+		log.Fatal(err)
+		return false
+	}
+	if ok := r.sendMail(); ok {
+		log.Printf("Email has been sent to %s\n", r.to)
+		return true
+	} else {
+		log.Printf("Failed to send the email to %s\n", r.to)
+		return false
+	}
+}

controllers/updateController.go

@@ -5,7 +5,6 @@ import (
 	"encoding/base64"
 	"fmt"
 	"io/ioutil"
-	"net/smtp"
 	"os"
 	"strings"
 	"time"
@@ -339,6 +338,12 @@ func UpdateStudentPassword(c *fiber.Ctx) error {
 	}
 	defer cancel()
 
+	// Alert email the password has changed
+	subject := "Password Changed"
+	receiver := student.PersonalData.Email
+	r := NewRequest([]string{receiver}, subject)
+	r.Send("./templates/selfPasswordChanged.html", map[string]string{"username": student.PersonalData.FirstName})
+
 	return c.Status(fiber.StatusOK).JSON(fiber.Map{
 		"success": true,
 		"message": "successfully updated student password",
@@ -413,12 +418,11 @@ func ResetStudentPassword(c *fiber.Ctx) error {
 	defer cancel()
 
 	// Send student personal email temp password
-	message := []byte("Your temporary password is " + tempPass)
-	auth := smtp.PlainAuth("", systemEmail, systemPassword, "smtp.gmail.com")
+	subject := "Password Changed"
+	receiver := student.PersonalData.Email
+	r := NewRequest([]string{receiver}, subject)
 
-	err := smtp.SendMail("smtp.gmail.com:587", auth, systemEmail, []string{student.PersonalData.Email}, message)
-	if err != nil {
-		cancel()
+	if err := r.Send("./templates/passwordChanged.html", map[string]string{"username": student.PersonalData.FirstName, "password": tempPass}); err {
 		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{
 			"success": false,
 			"message": "Could not send password to students email",
@@ -1263,6 +1267,18 @@ func UpdateTeacherPassword(c *fiber.Ctx) error {
 	}
 	defer cancel()
 
+	subject := "Password Changed"
+	receiver := teacher.PersonalData.Email
+	r := NewRequest([]string{receiver}, subject)
+
+	if err := r.Send("./templates/selfPasswordChanged.html", map[string]string{"username": teacher.PersonalData.FirstName}); err {
+		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{
+			"success": false,
+			"message": "Could not send password to teachers email",
+			"error":   err,
+		})
+	}
+
 	return c.Status(fiber.StatusOK).JSON(fiber.Map{
 		"success": true,
 		"message": "successfully updated teacher password",
@@ -1335,13 +1351,12 @@ func ResetTeacherPassword(c *fiber.Ctx) error {
 	}
 	defer cancel()
 
-	// Send student personal email temp password
-	message := []byte("Your temporary password is " + tempPass)
-	auth := smtp.PlainAuth("", systemEmail, systemPassword, "smtp.gmail.com")
+	// Send teacher personal email temp password
+	subject := "Password Changed"
+	receiver := teacher.PersonalData.Email
+	r := NewRequest([]string{receiver}, subject)
 
-	err := smtp.SendMail("smtp.gmail.com:587", auth, systemEmail, []string{teacher.PersonalData.Email}, message)
-	if err != nil {
-		cancel()
+	if err := r.Send("./templates/passwordChanged.html", map[string]string{"username": teacher.PersonalData.FirstName, "password": tempPass}); err {
 		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{
 			"success": false,
 			"message": "Could not send password to teachers email",