Initial commit

internal/smtp/server.go

@@ -0,0 +1,62 @@
+package smtp
+
+import (
+	"context"
+	"io"
+	"log"
+
+	"github.com/emersion/go-smtp"
+
+	"ur.gs/crockery/internal/store"
+)
+
+type Server interface {
+	Run()
+
+	io.Closer
+}
+
+func NewServer(cancel context.CancelFunc, datastore store.Interface, submission bool) Server {
+	out := &concrete{
+		cancel: cancel,
+		store:  datastore,
+	}
+
+	out.server = smtp.NewServer(out)
+	out.server.Domain = datastore.Domain()
+
+	if submission {
+		out.server.Addr = ":587"
+	} else {
+		out.server.Addr = ":25"
+	}
+
+	return out
+}
+
+type concrete struct {
+	cancel context.CancelFunc
+	store  store.Interface
+	server *smtp.Server
+}
+
+func (c *concrete) Run() {
+	if err := c.server.ListenAndServe(); err != nil {
+		log.Printf("Error serving SMTP %s: %v", c.server.Addr, err)
+	} else {
+		log.Printf("Stopped listening on SMTP %s", c.server.Addr)
+	}
+
+	c.cancel()
+}
+
+// backend implementation for go-smtp
+func (c *concrete) Login(string, string) (smtp.User, error) {
+	return nil, nil
+}
+
+func (c *concrete) Close() error {
+	c.cancel() // FIXME: this doesn't touch the server
+
+	return nil
+}