basic common app packages

email/message.go

@@ -0,0 +1,44 @@
+package email
+
+import (
+	"errors"
+	"net/mail"
+)
+
+type Message struct {
+	ReplyTo *mail.Address `json:"replyTo"`
+
+	ID       string
+	From     string `json:"from"`
+	Subject  string `json:"subject"`
+	HtmlBody string `json:"htmlBody"`
+	TxtBody  string `json:"txtBody"`
+
+	To  []mail.Address `json:"to"`
+	Cc  []mail.Address `json:"cc"`
+	Bcc []mail.Address `json:"bcc"`
+}
+
+func (m *Message) Validate() error {
+	if m == nil {
+		return errors.New("email: message is nil")
+	}
+
+	if len(m.To) == 0 {
+		return errors.New("email: message must have at least one recipient")
+	}
+
+	if len(m.From) == 0 {
+		return errors.New("email: message must have a sender")
+	}
+
+	if len(m.Subject) == 0 {
+		return errors.New("email: message must have a subject")
+	}
+
+	if len(m.HtmlBody) == 0 && len(m.TxtBody) == 0 {
+		return errors.New("email: message must have a body")
+	}
+
+	return nil
+}