public async Task <DocumentMetadata> SaveDocumentAsync(Document document)
{
// save the content if it doesn't already exist
string documentHash = _hashAlgorithm.GetHash(document.Content);
bool duplicate = await _blobContainer.ExistsAsync(documentHash);
if (duplicate)
{
_eventSource.OnDuplicateFoundInDocumentStore(document.Id, documentHash);
}
else
{
// compress the document
byte[] compressedContent = _compressor.Compress(document.Content);
await _blobContainer.SetAsync(documentHash, compressedContent);
}
// save the metadata, in reverse chronological order
string documentMetadataId = string.Format(
CultureInfo.InvariantCulture,
"{0}-{1}",
DateTimeOffset.UtcNow.GetDescendingOrderString(),
Guid.NewGuid());
var documentMetadata = new DocumentMetadata
{
Id = documentMetadataId,
DocumentId = document.Id,
Hash = documentHash,
Duplicate = duplicate,
Created = DateTimeOffset.UtcNow
};
await _table.SetAsync(GetDocumentMetadataPartitionKey(document.Id), documentMetadataId, documentMetadata);
return(documentMetadata);
}
