/// <summary>
/// Restore a specific file version as the current version.
/// </summary>
/// <param name="versioningFileItem">A versioning file instance containing the version to restore.</param>
/// <param name="versionId">Version id of the version to restore.</param>
public static void RestoreVersion(IVersioningFile versioningFileItem, string versionId)
{
Validate.RequiredParameter("versioningFileItem", versioningFileItem);
if (String.IsNullOrEmpty(versionId))
{
throw new ArgumentException("versionId can not be null or empty", "versionId");
}
ThrowIfCheckedOut(versioningFileItem);
IList <UnifiedVersion> versions = versioningFileItem.GetVersions();
if (versions.Count == 1)
{
throw new InvalidVersioningOperationException("Can not restore version when only one version exists.");
}
UnifiedVersion targetVersion = versions.SingleOrDefault <UnifiedVersion>(v => v.Id.ToString() == versionId);
if (targetVersion == null)
{
throw new VersionNotFoundException(versionId);
}
var query = from version in versions orderby version.Changed descending select version;
UnifiedVersion lastVersion = query.First <UnifiedVersion>();
if (lastVersion.Id.ToString() == targetVersion.Id.ToString())
{
throw new InvalidVersioningOperationException("The version to be restored is already the currently active version.");
}
targetVersion.Restore();
}
/// <summary>
/// Deletes a specific file version.
/// </summary>
/// <param name="versioningFileItem">File version.</param>
/// <param name="versionId">File version Id.</param>
public static void DeleteVersion(IVersioningFile versioningFileItem, string versionId)
{
Validate.RequiredParameter("versioningFileItem", versioningFileItem);
if (String.IsNullOrEmpty(versionId))
{
throw new ArgumentException("versionId can not be null or empty", "versionId");
}
ThrowIfCheckedOut(versioningFileItem);
IList <UnifiedVersion> versions = versioningFileItem.GetVersions();
if (versions.Count == 1)
{
throw new InvalidVersioningOperationException();
}
UnifiedVersion targetVersion = versions.SingleOrDefault <UnifiedVersion>(v => v.Id.ToString() == versionId);
if (targetVersion == null)
{
throw new VersionNotFoundException(versionId);
}
targetVersion.Delete();
}
