filedrive: wrap ListDir to exclude future dated files

pkg/filedrive/mtime_filter.go

@@ -0,0 +1,36 @@
+package filedrive
+
+import (
+	"time"
+
+	"goftp.io/server/core"
+)
+
+type MTimeFilter struct {
+	core.Driver
+}
+
+func (mtf MTimeFilter) ListDir(path string, callback func(core.FileInfo) error) error {
+	now := time.Now()
+
+	return mtf.Driver.ListDir(path, func(info core.FileInfo) error {
+		if info.ModTime().Before(now) {
+			return callback(info)
+		}
+		return nil
+	})
+}
+
+type Factory struct {
+	DriverFactory core.DriverFactory
+}
+
+func (f *Factory) NewDriver() (core.Driver, error) {
+	dd, err := f.DriverFactory.NewDriver()
+	if err != nil {
+		return nil, err
+	}
+	return MTimeFilter{
+		Driver: dd,
+	}, nil
+}

pkg/service/server.go

@@ -10,6 +10,7 @@ import (
 	"path/filepath"
 
 	_ "github.com/moov-io/ach-test-harness"
+	"github.com/moov-io/ach-test-harness/pkg/filedrive"
 	"github.com/moov-io/base/admin"
 	"github.com/moov-io/base/log"
 
@@ -42,12 +43,15 @@ func bootFTPServer(errs chan<- error, logger log.Logger, cfg *FTPConfig, respons
 	createDataDirectories(errs, logger, cfg)
 
 	// Start the FTP server
-	fileDriver := &file.DriverFactory{
+	fileDriverFactory := &file.DriverFactory{
 		RootPath: cfg.RootPath,
 		Perm:     ftp.NewSimplePerm("user", "group"),
 	}
+	filteringDriver := &filedrive.Factory{
+		DriverFactory: fileDriverFactory,
+	}
 	opts := &ftp.ServerOpts{
-		Factory:  fileDriver,
+		Factory:  filteringDriver,
 		Port:     cfg.Port,
 		Hostname: cfg.Hostname,
 		Auth: &ftp.SimpleAuth{