Introduce pkg/mail.Addr

Signed-off-by: Émile Ré <nemile.re@gmail.com>

pkg/server/gqlutils/types/mail/addr.go

@@ -0,0 +1,46 @@
+// Copyright (c) 2025 Probo Inc <hello@getprobo.com>.
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+package mail
+
+import (
+	"errors"
+	"io"
+	"strconv"
+
+	"github.com/99designs/gqlgen/graphql"
+	"go.probo.inc/probo/pkg/mail"
+)
+
+type AddrScalar = mail.Addr
+
+func MarshalAddrScalar(a mail.Addr) graphql.Marshaler {
+	return graphql.WriterFunc(func(w io.Writer) {
+		w.Write([]byte(strconv.Quote(a.String())))
+	})
+}
+
+func UnmarshalAddrScalar(v interface{}) (mail.Addr, error) {
+	s, ok := v.(string)
+	if !ok {
+		return mail.Nil, errors.New("must be a string")
+	}
+
+	a, err := mail.ParseAddr(s)
+	if err != nil {
+		return mail.Nil, err
+	}
+
+	return a, nil
+}