/// <summary>
/// <c>LockscreenImageItemSetting</c>をJSONに変換する.
/// </summary>
/// <param name="setting"></param>
/// <returns></returns>
public static JsonObject ToJson(this LockscreenImageItemSetting setting)
{
var jsonObj = new JsonObject();
jsonObj.Add(LockscreenImageItemSettingProperty.Token.ToString(), JsonValue.CreateStringValue(setting.Token));
jsonObj.Add(LockscreenImageItemSettingProperty.IsTemporary.ToString(), JsonValue.CreateBooleanValue(setting.IsTemporary));
if (!String.IsNullOrEmpty(setting.TileId))
{
jsonObj.Add(LockscreenImageItemSettingProperty.TileId.ToString(), JsonValue.CreateStringValue(setting.TileId));
}
return(jsonObj);
}
/// <summary>
/// 指定したファイルを対象とする「ロック画面に設定するアイテム」を作成する.
/// </summary>
/// <param name="file">ファイル</param>
/// <returns>ロック画面に設定するアイテム</returns>
public static async Task <LockscreenImageItem> FromStorageItemAsync(StorageFile file, bool isTemporaryDefault, System.Threading.CancellationToken cancellationToken)
{
if (file == null)
{
throw new ArgumentNullException("file");
}
// await Task.Delay(10 * 1000, cancellationToken);
try
{
// temporaryはLocalFolderにKeepする
// + remove時に削除できるようにフラグをset
var fileAdded = file;
bool isTemporary = isTemporaryDefault;
if (file.Attributes.HasFlag(FileAttributes.Temporary))
{
isTemporary = true;
var folder = await ApplicationData.Current.LocalFolder.CreateFolderAsync(@"TempFileCache", CreationCollisionOption.OpenIfExists).AsTask(cancellationToken);
fileAdded = await file.CopyAsync(folder, file.Name, NameCollisionOption.GenerateUniqueName).AsTask(cancellationToken);
}
var token = StorageApplicationPermissions.FutureAccessList.Add(fileAdded);
var setting = new LockscreenImageItemSetting()
{
Token = token, IsTemporary = isTemporary
};
return(new LockscreenImageItem(fileAdded)
{
Setting = setting,
});
}
catch (System.IO.FileNotFoundException /*ex*/)
{
return(null);
}
}
