Add the beginnings of SMTP session management

internal/smtp/session.go

@@ -0,0 +1,32 @@
+package smtp
+
+import (
+	"fmt"
+	"io"
+	"io/ioutil"
+	"log"
+)
+
+// type Session implements the User interface for emersion/go-smtp
+type Session struct {
+	ID          uint64
+	AccountName string
+	ServiceName string
+}
+
+func (s *Session) Send(from string, to []string, r io.Reader) error {
+	data, err := ioutil.ReadAll(r)
+	if err != nil {
+		return err
+	}
+
+	log.Printf("%s session %d for %s: from=%s, to=%s, r=<<EOF\n%s\nEOF", s.ServiceName, s.ID, s.AccountName, from, to, string(data))
+
+	return fmt.Errorf("Not yet implemented")
+}
+
+func (s *Session) Logout() error {
+	log.Printf("Ending %s session %d for %s", s.ServiceName, s.ID, s.AccountName)
+
+	return nil
+}