public string CreateUniqueParagraphId()
{
// Lazily retrieve it as the collection may be updated in the feature collection and we want to react to that change.
var collection = _features.GetRequired <IParagraphIdCollectionFeature>();
var bytes = new byte[] { 0x00, 0x00, 0x00, 0x00 };
string?str;
do
{
do
{
_randomNumber.GetBytes(bytes);
}while (bytes[0] >= 0x80 || (bytes[0] == 0 && bytes[1] == 0 && bytes[2] == 0 && bytes[3] == 0));
str = HexStringFactory.Create(bytes);
}while (collection.Contains(str));
return(str);
}
public void AssignUniqueParagraphIds_WordDocumentWithNonUniqueIds_AllParaIdsUnique()
{
// Arrange.
// Construct a document with 100 different w14:paraId values and many duplicates.
const int count = 1000;
const int divisor = 100;
var body = new Body();
for (var i = 0; i < count; i++)
{
string paragraphId = HexStringFactory.Create(0x00, 0x00, 0x00, (byte)(i % divisor)) !;
body.AppendChild(new Paragraph(new Run(new Text(paragraphId)))
{
ParagraphId = paragraphId
});
}
using var stream = new MemoryStream();
using var wordDocument = WordprocessingDocument.Create(stream, WordprocessingDocumentType.Document);
wordDocument.AddParagraphIdFeature();
var paraIdCollection = wordDocument.Features.GetRequired <IParagraphIdCollectionFeature>();
var part = wordDocument.AddMainDocumentPart();
part.Document = new Document(body);
// Assert.
// We have as many registered w14:paraId values as we have w:p elements.
Assert.Equal(count, paraIdCollection.Count);
// When checked independently, the number of w14:paraId values matches.
var newParaIds = new HashSet <string>(body.Elements <Paragraph>().Select(p => p.ParagraphId !.Value !));
Assert.Equal(count, newParaIds.Count);
// The first 100 w:p elements did not have their w14:paraId value changed.
Assert.All(body.Elements <Paragraph>().Take(divisor), p => Assert.Equal(p.InnerText, p.ParagraphId !.InnerText));
// The following 900 w:p elements did have their w14:paraId values changed.
Assert.All(body.Elements <Paragraph>().Skip(divisor), p => Assert.NotEqual(p.InnerText, p.ParagraphId !.InnerText));
}
