/// <summary>
/// Creates and uploades to storage thumbnails for the given content item.
/// </summary>
/// <param name="contentItem"></param>
internal void CreateThumbnails(ContentItem contentItem)
{
if (contentItem == null || _thumbnailsStorage == null || contentItem.Uri == null || string.Compare(contentItem.MediaType, "Image", StringComparison.OrdinalIgnoreCase) != 0)
return;
// Retrieve storage account information
CloudStorageAccount storageAccount = CloudStorageAccount.Parse(_thumbnailsStorage);
// Create the blob client.
CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();
// Retrieve a reference to images container.
CloudBlobContainer imagesContainer = blobClient.GetContainerReference("images");
if (!imagesContainer.Exists())
{
imagesContainer.CreateIfNotExists();
imagesContainer.SetPermissions(
new BlobContainerPermissions
{
PublicAccess = BlobContainerPublicAccessType.Blob
});
}
// Generate thumbnails
WebRequest request = WebRequest.Create(contentItem.Uri);
using (WebResponse response = request.GetResponse())
{
Stream responseStream = response.GetResponseStream();
using (Bitmap bitmap = new Bitmap(responseStream))
{
if (response.ContentLength > _maxSourceContentLength)
{
throw new InvalidDataException("Source image is too big.");
}
SaveUploadThumbnail(imagesContainer, contentItem.Id.ToString(), bitmap, 8);
SaveUploadThumbnail(imagesContainer, contentItem.Id.ToString(), bitmap, 16);
SaveUploadThumbnail(imagesContainer, contentItem.Id.ToString(), bitmap, 32);
SaveUploadThumbnail(imagesContainer, contentItem.Id.ToString(), bitmap, 64);
SaveUploadThumbnail(imagesContainer, contentItem.Id.ToString(), bitmap, 128);
}
}
}
//used if creating timeline objects instead of flat json objects
private static Exhibit createExhibit(Timeline j, String URL, Collection col)
{
Exhibit e = new Exhibit();
e.Id = Guid.NewGuid();
e.Title = j.Title + " - Exhibit"; //todo
e.Threshold = "8. Origins of modern world"; //todo
e.Regime = "Humanity"; //todo
e.TimeUnit = "ce";
e.Day = j.FromDay;
e.Month = j.FromMonth;
e.Year = j.FromYear;
e.Sequence = 100;
e.UniqueId = my_exhibit_count++;
e.Collection = col;
e.ContentItems = new System.Collections.ObjectModel.Collection<ContentItem>();
for (int i = 0; i < 4; i++)
{
ContentItem c = new ContentItem();
c.Id = Guid.NewGuid();
c.UniqueId = my_contentitem_count++;
c.Title = j.Title + "- ContentItem";
c.Threshold = "8. Origins of modern world";
c.Regime = "Humanity";
c.TimeUnit = "ce";
c.Year = j.ToYear;
c.Order = 1; //todo
c.HasBibliography = false; //todo
c.MediaSource = "Library of Congress"; //todo
c.Attribution = "Library of Congress"; //todo
c.Collection = col;
switch (i)
{
case 0:
{
c.Caption = j.Title + "- JP2";
c.MediaType = "JP2";
c.Uri = URL + ".jp2";
break;
}
case 1:
{
c.Caption = j.Title + "- TXT";
c.MediaType = "TXT";
c.Uri = URL + "/ocr.txt";
break;
}
case 2:
{
c.Caption = j.Title + "- PDF";
c.MediaType = "PDF";
c.Uri = URL + ".pdf";
break;
}
case 3:
{
c.Caption = j.Title + "- OCR";
c.MediaType = "OCR";
c.Uri = URL + "/ocr.xml";
break;
}
}
// Insert into db here
dbInst.ContentItems.Add(c);
e.ContentItems.Add(c);
}
dbInst.Exhibits.Add(e);
return e;
}
