/// <summary>
/// Return a JSON representation for the given enumeration of blog postings.
/// </summary>
/// <param name="BlogPostings">An enumeration of blog postings.</param>
/// <param name="Skip">The optional number of blog postings to skip.</param>
/// <param name="Take">The optional number of blog postings to return.</param>
/// <param name="Embedded">Whether this data is embedded into another data structure.</param>
public static JArray ToJSON(this IEnumerable <BlogPosting> BlogPostings,
UInt64?Skip = null,
UInt64?Take = null,
Boolean Embedded = false,
InfoStatus ExpandTags = InfoStatus.ShowIdOnly,
BlogPostingToJSONDelegate BlogPostingToJSON = null,
Boolean IncludeCryptoHash = true)
=> BlogPostings?.Any() != true
? new JArray()
: new JArray(BlogPostings.
Where(dataSet => dataSet != null).
OrderBy(dataSet => dataSet.Id).
SkipTakeFilter(Skip, Take).
SafeSelect(BlogPosting => BlogPostingToJSON != null
? BlogPostingToJSON(BlogPosting,
Embedded,
ExpandTags,
IncludeCryptoHash)
: BlogPosting.ToJSON(Embedded,
ExpandTags,
IncludeCryptoHash)));
public BlogPosting Sign(ICipherParameters PrivateKey)
{
var posting = new BlogPosting(Id,
Text,
PublicationDate,
GeoLocation,
Tags,
PrivacyLevel,
IsHidden,
Signatures,
DataSource);
var ctext = posting.ToJSON(Embedded: false,
ExpandTags: InfoStatus.ShowIdOnly,
IncludeCryptoHash: false).ToString(Newtonsoft.Json.Formatting.None);
var BlockSize = 32;
var SHA256 = new SHA256Managed();
var SHA256Hash = SHA256.ComputeHash(ctext.ToUTF8Bytes());
var signer = SignerUtilities.GetSigner("NONEwithECDSA");
signer.Init(true, PrivateKey);
signer.BlockUpdate(SHA256Hash, 0, BlockSize);
var signature = signer.GenerateSignature().ToHexString();
var signatures = new List <BlogPostingSignature>(Signatures);
signatures.Add(new BlogPostingSignature("json", "secp256k1", "DER+HEX", signature));
return(new BlogPosting(Id,
Text,
PublicationDate,
GeoLocation,
Tags,
PrivacyLevel,
IsHidden,
signatures,
DataSource));
}
