public LightboxPreviewModel GetGalleryPreviewModel(IEnumerable <int> mediaIds, IPresetStrategy strategy)
{
var medias = Umbraco.Web.Composing.Current.UmbracoHelper.Media(mediaIds);
var mediasList = medias.ToList();
var galleryViewModelList = mediasList.Select(MapToMedia).ToList();
TransformPreviewImage(galleryViewModelList, strategy);
var mediasViewModel = FindMedias(galleryViewModelList);
var galleryPreviewModel = new LightboxPreviewModel
{
Medias = mediasViewModel.Map <IEnumerable <LightboxGalleryItemPreviewModel> >(),
OtherFiles = galleryViewModelList.Except(mediasViewModel)
.Map <IEnumerable <LightboxGalleryItemPreviewModel> >()
};
galleryPreviewModel.Medias = galleryPreviewModel.Medias
.Select(MapAsHidden())
.ToList();
galleryPreviewModel.HiddenImagesCount = galleryPreviewModel.Medias.Count(i => i.IsHidden);
galleryPreviewModel.FilesToDisplay = strategy.MediaFilesToDisplay;
var count = mediasViewModel.Count;
if (count > 2)
{
galleryPreviewModel.AdditionalImages = Math.Abs(strategy.MediaFilesToDisplay - count);
}
return(galleryPreviewModel);
}
private void TransformPreviewImage(List <LightboxGalleryItemViewModel> galleryItems, IPresetStrategy strategy)
{
var imageItems = galleryItems.FindAll(m => m.Type is MediaTypeEnum.Image || m.Type is MediaTypeEnum.Video);
if (imageItems.Count == 1)
{
var item = imageItems[0];
item.PreviewUrl = _imageHelper.GetImageWithResize(IsVideo(item.Type)
? item.PreviewUrl
: item.Url, strategy.PreviewPreset);
return;
}
foreach (var item in imageItems)
{
item.PreviewUrl = imageItems.Count < 3 ?
_imageHelper.GetImageWithResize(IsVideo(item.Type) ? item.PreviewUrl : item.Url, strategy.PreviewTwoPreset) :
_imageHelper.GetImageWithResize(IsVideo(item.Type) ? item.PreviewUrl : item.Url, strategy.ThumbnailPreset);
}
}