Create fs.Directory interface and use it everywhere

fs/dir.go

@@ -0,0 +1,85 @@
+package fs
+
+import "time"
+
+// Dir describes an unspecialized directory for directory/container/bucket lists
+type Dir struct {
+	remote  string    // name of the directory
+	modTime time.Time // modification or creation time - IsZero for unknown
+	size    int64     // size of directory and contents or -1 if unknown
+	items   int64     // number of objects or -1 for unknown
+}
+
+// NewDir creates an unspecialized Directory object
+func NewDir(remote string, modTime time.Time) *Dir {
+	return &Dir{
+		remote:  remote,
+		modTime: modTime,
+		size:    -1,
+		items:   -1,
+	}
+}
+
+// NewDirCopy creates an unspecialized copy of the Directory object passed in
+func NewDirCopy(d Directory) *Dir {
+	return &Dir{
+		remote:  d.Remote(),
+		modTime: d.ModTime(),
+		size:    d.Size(),
+		items:   d.Items(),
+	}
+}
+
+// String returns the name
+func (d *Dir) String() string {
+	return d.remote
+}
+
+// Remote returns the remote path
+func (d *Dir) Remote() string {
+	return d.remote
+}
+
+// SetRemote sets the remote
+func (d *Dir) SetRemote(remote string) *Dir {
+	d.remote = remote
+	return d
+}
+
+// ModTime returns the modification date of the file
+// It should return a best guess if one isn't available
+func (d *Dir) ModTime() time.Time {
+	if !d.modTime.IsZero() {
+		return d.modTime
+	}
+	return time.Now()
+}
+
+// Size returns the size of the file
+func (d *Dir) Size() int64 {
+	return d.size
+}
+
+// SetSize sets the size of the directory
+func (d *Dir) SetSize(size int64) *Dir {
+	d.size = size
+	return d
+}
+
+// Items returns the count of items in this directory or this
+// directory and subdirectories if known, -1 for unknown
+func (d *Dir) Items() int64 {
+	return d.items
+}
+
+// SetItems sets the number of items in the directory
+func (d *Dir) SetItems(items int64) *Dir {
+	d.items = items
+	return d
+}
+
+// Check interfaces
+var (
+	_ DirEntry  = (*Dir)(nil)
+	_ Directory = (*Dir)(nil)
+)