private Stream PerformFind(string url)
{
int index = url.IndexOf('?');
if (index == -1)
return null;
string queryString = url.Substring(index + 1);
string query;
if (!ParseQueryString(queryString).TryGetValue("q", out query))
return null;
var hits = _searchManager.Search(query);
var writer = new HtmlWriter();
FormatSearchResults(writer, query, hits);
return new MemoryStream(Encoding.UTF8.GetBytes(writer.ToString()));
}
private Stream PerformRoot()
{
var writer = new HtmlWriter();
FormatHome(writer);
return new MemoryStream(Encoding.UTF8.GetBytes(writer.ToString()));
}
private void FormatSearchResults(HtmlWriter writer, string query, IList<HelpSearchResult> hits)
{
writer.OpenTag("html");
FormatHead(writer);
FormatSearchResultsBody(writer, query, hits);
writer.CloseTag();
}
private void FormatSearchResultsBody(HtmlWriter writer, string query, IList<HelpSearchResult> hits)
{
writer.OpenTag("body").Attribute("class", "search-results");
writer
.OpenTag("h1").Text(Labels.SearchResultsFor).Text(" ")
.OpenTag("span").Attribute("class", "search-query").Text(query).CloseTag()
.CloseTag();
var queryWords = ParseQuery(query);
foreach (var hit in hits)
{
FormatHit(writer, queryWords, hit);
}
writer.CloseTag();
}
private void FormatHomeBody(HtmlWriter writer)
{
writer.OpenTag("body").Attribute("class", "search-results");
writer.OpenTag("h1").Text(Labels.NeedAssistance).CloseTag();
writer.OpenTag("p").Text(Labels.UseSearchBox).CloseTag();
writer.OpenTag("p").Text(Labels.UseHelpButton).CloseTag();
writer.CloseTag();
}
private void FormatHome(HtmlWriter writer)
{
writer.OpenTag("html");
FormatHead(writer);
FormatHomeBody(writer);
writer.CloseTag();
}
private void FormatHit(HtmlWriter writer, HashSet<string> query, HelpSearchResult hit)
{
writer.OpenTag("p").Attribute("class", "search-result");
writer
.OpenTag("div").Attribute("class", "search-title")
.OpenTag("a").Attribute("href", hit.Path);
FormatEmphasis(writer, query, hit.Title);
writer
.CloseTag()
.CloseTag();
writer.OpenTag("div").Attribute("class", "search-content");
FormatEmphasis(writer, query, hit.Content);
writer.CloseTag();
writer.CloseTag();
}
private void FormatEmphasis(HtmlWriter writer, HashSet<string> query, string text)
{
var words = ParseContent(text);
int start = -1;
int end = -1;
for (int i = 0; i < words.Count; i++)
{
if (!query.Contains(words[i].ToLower()))
continue;
int leading = SearchResultLeading;
start = 0;
for (int j = i - 1; j >= 0; j--)
{
leading -= words[j].Length;
if (leading < 0)
{
start = j + 1;
break;
}
}
end = FindEnd(start, words);
break;
}
if (start == -1)
{
start = 0;
end = FindEnd(start, words);
}
bool wasContained = false;
for (int j = start; j < end; j++)
{
bool isContained = query.Contains(words[j].ToLower());
if (isContained != wasContained)
{
if (isContained)
writer.OpenTag("b");
else
writer.CloseTag();
wasContained = isContained;
}
writer.Text(words[j]);
}
if (wasContained)
writer.CloseTag();
}
private static void FormatHead(HtmlWriter writer)
{
writer.OpenTag("head");
writer.Tag("title", Labels.SearchResults);
writer.OpenTag("link").Attribute("type", "text/css").Attribute("rel", "stylesheet").Attribute("href", "/help.css").CloseTag();
writer.OpenTag("script").Attribute("src", "/help.js").Attribute("type", "text/javascript").Text("").CloseTag();
writer.CloseTag();
}
