func (a *API) convertStateVolumeToParams(st state.Volume) (params.VolumeInstance, error) {
volume := params.VolumeInstance{VolumeTag: st.VolumeTag().String()}
if storage, err := st.StorageInstance(); err == nil {
volume.StorageTag = storage.String()
storageInstance, err := a.storage.StorageInstance(storage)
if err != nil {
err = errors.Annotatef(err,
"getting storage instance %v for volume %v",
storage, volume.VolumeTag)
return params.VolumeInstance{}, err
}
owner := storageInstance.Owner()
// only interested in Unit for now
if unitTag, ok := owner.(names.UnitTag); ok {
volume.UnitTag = unitTag.String()
}
}
if info, err := st.Info(); err == nil {
volume.HardwareId = info.HardwareId
volume.Size = info.Size
volume.Persistent = info.Persistent
volume.VolumeId = info.VolumeId
}
status, err := st.Status()
if err != nil {
return params.VolumeInstance{}, errors.Trace(err)
}
volume.Status = common.EntityStatusFromState(status)
return volume, nil
}
func createVolumeDetails(
st storageAccess, v state.Volume, attachments []state.VolumeAttachment,
) (*params.VolumeDetails, error) {
details := ¶ms.VolumeDetails{
VolumeTag: v.VolumeTag().String(),
}
if info, err := v.Info(); err == nil {
details.Info = storagecommon.VolumeInfoFromState(info)
}
if len(attachments) > 0 {
details.MachineAttachments = make(map[string]params.VolumeAttachmentInfo, len(attachments))
for _, attachment := range attachments {
stateInfo, err := attachment.Info()
var info params.VolumeAttachmentInfo
if err == nil {
info = storagecommon.VolumeAttachmentInfoFromState(stateInfo)
}
details.MachineAttachments[attachment.Machine().String()] = info
}
}
status, err := v.Status()
if err != nil {
return nil, errors.Trace(err)
}
details.Status = common.EntityStatusFromState(status)
if storageTag, err := v.StorageInstance(); err == nil {
storageInstance, err := st.StorageInstance(storageTag)
if err != nil {
return nil, errors.Trace(err)
}
storageDetails, err := createStorageDetails(st, storageInstance)
if err != nil {
return nil, errors.Trace(err)
}
details.Storage = storageDetails
}
return details, nil
}