cleanup From, To and Cc. Send replies to all recipients (To+Cc)

email/utils.go

@@ -22,6 +22,34 @@ func MessageID(eventID id.EventID, domain string) string {
 	return fmt.Sprintf("<%s@%s>", eventID, domain)
 }
 
+// Address gets email address from a valid email address notation (eg: "Jane Doe" <jane@example.com> -> jane@example.com)
+func Address(email string) string {
+	addr, _ := mail.ParseAddress(email) //nolint:errcheck // if it fails here, nothing will help
+	if addr == nil {
+		return email
+	}
+
+	return addr.Address
+}
+
+// Address gets email address from a valid email address notation (eg: "Jane Doe" <jane@example.com>, john.doe@example.com -> jane@example.com, john.doe@example.com)
+func AddressList(emailList string) []string {
+	if emailList == "" {
+		return []string{}
+	}
+	list, _ := mail.ParseAddressList(emailList) //nolint:errcheck // if it fails here, nothing will help
+	if len(list) == 0 {
+		return []string{}
+	}
+
+	addrs := make([]string, 0, len(list))
+	for _, addr := range list {
+		addrs = append(addrs, addr.Address)
+	}
+
+	return addrs
+}
+
 // dateNow returns Date in RFC1123 with numeric timezone
 func dateNow(original ...time.Time) string {
 	now := time.Now().UTC()