packages for handling email and protocol buffers

Signed-off-by: Michael <michael.lindman@gmail.com>

email/email.go

@@ -0,0 +1,29 @@
+package email
+
+import (
+	"fmt"
+	"net/smtp"
+	"strings"
+)
+
+type Mail struct {
+	Sender  string
+	To      []string
+	Subject string
+	Body    string
+}
+
+func (mail Mail) Compose() string {
+	msg := fmt.Sprintf("From: %s\r\n", mail.Sender)
+	msg += fmt.Sprintf("To: %s\r\n", strings.Join(mail.To, ";"))
+	msg += fmt.Sprintf("Subject: %s\r\n", mail.Subject)
+	msg += fmt.Sprintf("\r\n%s\r\n", mail.Body)
+	return msg
+}
+
+func (mail Mail) SendMail(addr string, a smtp.Auth) error {
+	if err := smtp.SendMail(addr, a, mail.Sender, mail.To, []byte(mail.Compose())); err != nil {
+		return err
+	}
+	return nil
+}

pb/proto.go

@@ -0,0 +1,33 @@
+package pb
+
+import (
+	"io/fs"
+	"io/ioutil"
+
+	"google.golang.org/protobuf/proto"
+	"google.golang.org/protobuf/reflect/protoreflect"
+)
+
+// Read protocol buffer from file
+func ReadFile(path string, message protoreflect.ProtoMessage) error {
+	file, err := ioutil.ReadFile(path)
+	if err != nil {
+		return err
+	}
+	if err := proto.Unmarshal(file, message); err != nil {
+		return err
+	}
+	return nil
+}
+
+// Write protocol buffer to file
+func WriteFile(path string, message protoreflect.ProtoMessage, perm fs.FileMode) error {
+	msg, err := proto.Marshal(message)
+	if err != nil {
+		return err
+	}
+	if err := ioutil.WriteFile(path, msg, perm); err != nil {
+		return err
+	}
+	return nil
+}