Add Checkpoint properties

Checkpoint.go

@@ -2,9 +2,26 @@ package gonetworkmanager
 
 import "github.com/godbus/dbus"
 
-type Checkpoint interface {
+const (
+	CheckpointInterface = NetworkManagerInterface + ".Checkpoint"
 
+	/* Properties */
+	CheckpointPropertyDevices         = CheckpointInterface + ".Devices"         // readable   ao
+	CheckpointPropertyCreated         = CheckpointInterface + ".Created"         // readable   x
+	CheckpointPropertyRollbackTimeout = CheckpointInterface + ".RollbackTimeout" // readable   u
+)
+
+type Checkpoint interface {
 	GetPath() dbus.ObjectPath
+
+	// Array of object paths for devices which are part of this checkpoint.
+	GetPropertyDevices() []Device
+
+	// The timestamp (in CLOCK_BOOTTIME milliseconds) of checkpoint creation.
+	GetPropertyCreated() int64
+
+	// Timeout in seconds for automatic rollback, or zero.
+	GetPropertyRollbackTimeout() uint32
 }
 
 func NewCheckpoint(objectPath dbus.ObjectPath) (Checkpoint, error) {
@@ -16,6 +33,29 @@ type checkpoint struct {
 	dbusBase
 }
 
+func (c *checkpoint) GetPropertyDevices() []Device {
+	devicesPaths := c.getSliceObjectProperty(CheckpointPropertyDevices)
+	devices := make([]Device, len(devicesPaths))
+
+	var err error
+	for i, path := range devicesPaths {
+		devices[i], err = NewDevice(path)
+		if err != nil {
+			panic(err)
+		}
+	}
+
+	return devices
+}
+
+func (c *checkpoint) GetPropertyCreated() int64 {
+	return c.getInt64Property(CheckpointPropertyCreated)
+}
+
+func (c *checkpoint) GetPropertyRollbackTimeout() uint32 {
+	return c.getUint32Property(CheckpointPropertyRollbackTimeout)
+}
+
 func (c *checkpoint) GetPath() dbus.ObjectPath {
 	return c.obj.Path()
 }

utils.go

@@ -140,6 +140,14 @@ func (d *dbusBase) getUint32Property(iface string) uint32 {
 	return value
 }
 
+func (d *dbusBase) getInt64Property(iface string) int64 {
+	value, ok := d.getProperty(iface).(int64)
+	if !ok {
+		panic(makeErrVariantType(iface))
+	}
+	return value
+}
+
 func (d *dbusBase) getSliceUint32Property(iface string) []uint32 {
 	value, ok := d.getProperty(iface).([]uint32)
 	if !ok {