public string[] GenerateSnippet()
{
var highlightedTerms = new HashSet <int>();
var highlighter = new TermHighlighter(query.TermsWithSynonyms, "<b>", "</b>");
var snippet = new List <string> {
highlighter.Highlight(document.Title, highlightedTerms)
};
string lastLineWithTerm = null;
foreach (string line in document.Content)
{
int termCountBeforeHighlighting = highlightedTerms.Count;
string highlightedLine = highlighter.Highlight(line, highlightedTerms);
if (highlightedTerms.Count > termCountBeforeHighlighting && termCountBeforeHighlighting != query.TermsWithSynonyms.Length)
{
snippet.Add(highlightedLine);
}
if (line != highlightedLine && lastLineWithTerm == null)
{
lastLineWithTerm = highlightedLine;
}
}
if (snippet.Count == 1)
{
snippet.Add(lastLineWithTerm ?? highlighter.Highlight(document.Content.First()));
}
return(snippet.ToArray());
}
protected void Page_Load(object sender, EventArgs e)
{
string documentId = Request.QueryString["id"];
if (documentId.Any(x => !char.IsDigit(x)))
{
GoAway();
}
Document document;
try
{
document = new Document(documentId);
}
catch
{
GoAway();
return;
}
string sourceQuery = Request.QueryString["sourceQuery"];
var highlighter = new TermHighlighter(
RawQueryParser.Parse(sourceQuery, null, null, null).TermsWithSynonyms,
"<span style='background-color: yellow'>",
"</span>");
if (!string.IsNullOrEmpty(sourceQuery))
{
document.Content = document.Content.Select(x => highlighter.Highlight(x));
}
string finalText = string.Join("", document.Content.Select(x => string.Format("<div>{0}</div>", x)).ToArray());
lblOriginalText.Text = string.Format("<h1>{0}</h1><div>{1}</div>", highlighter.Highlight(document.Title), finalText);
}