public HtmlLinkTag Parse(HtmlLinkTag htmlLinkTag)
{
if (IsExternalLink(htmlLinkTag.OriginalHref))
{
// Add the external-link class to all outward bound links,
// except for anchors pointing to <a name=""> tags on the current page.
// (# links shouldn't be treated as internal links)
if (!htmlLinkTag.OriginalHref.StartsWith("#", StringComparison.Ordinal))
{
htmlLinkTag.CssClass = "external-link";
}
}
else
{
string href = htmlLinkTag.OriginalHref;
string upperHref = href.ToUpperInvariant();
if (upperHref.StartsWith("ATTACHMENT:", StringComparison.Ordinal) ||
upperHref.StartsWith("~/", StringComparison.Ordinal))
{
ConvertAttachmentToFullPath(htmlLinkTag);
}
else if (upperHref.StartsWith("SPECIAL:", StringComparison.Ordinal))
{
ConvertSpecialLinkToFullPath(htmlLinkTag);
}
else
{
ConvertInternalLinkToFullPath(htmlLinkTag);
}
}
return(htmlLinkTag);
}
private void ConvertSpecialLinkToFullPath(HtmlLinkTag htmlLinkTag)
{
// note: "~" is replaced by ASP.NET HttpContext
string href = htmlLinkTag.OriginalHref;
htmlLinkTag.Href = ConvertToAbsolutePath("~/wiki/" + href);
}
private void ConvertAttachmentToFullPath(HtmlLinkTag htmlLinkTag)
{
string href = htmlLinkTag.OriginalHref;
string upperHref = href.ToUpperInvariant();
if (upperHref.StartsWith("ATTACHMENT:", StringComparison.Ordinal))
{
// Remove the attachment: part
href = href.Remove(0, 11);
if (!href.StartsWith("/", StringComparison.Ordinal))
{
href = "/" + href;
}
}
else if (upperHref.StartsWith("~/", StringComparison.Ordinal))
{
// Remove the ~
href = href.Remove(0, 1);
}
// Get the full path to the attachment
string attachmentsPath = _textSettings.AttachmentsUrlPath;
if (attachmentsPath.EndsWith("/", StringComparison.Ordinal))
{
attachmentsPath = attachmentsPath.Remove(attachmentsPath.Length - 1);
}
htmlLinkTag.Href = ConvertToAbsolutePath(attachmentsPath) + href;
}
private void ConvertInternalLinkToFullPath(HtmlLinkTag htmlLinkTag)
{
string href = htmlLinkTag.OriginalHref;
// Parse internal links
string title = href;
string querystringAndAnchor = ""; // querystrings, #anchors
// Parse querystrings and #
if (_querystringRegex.IsMatch(href))
{
// Grab the querystring contents
Match match = _querystringRegex.Match(href);
querystringAndAnchor = match.Groups["querystring"].Value;
// Grab the url
title = href.Replace(querystringAndAnchor, "");
}
else if (_anchorRegex.IsMatch(href))
{
// Grab the hash contents
System.Text.RegularExpressions.Match match = _anchorRegex.Match(href);
querystringAndAnchor = match.Groups["hash"].Value;
// Grab the url
title = href.Replace(querystringAndAnchor, "");
}
// For markdown, only urls with "-" in them are valid, spaces are ignored.
// Remove these, so a match is made. No page title should have a "-" in?, so replacing them is ok.
title = title.Replace("-", " ");
// Find the page, or if it doesn't exist point to the new page url
Page page = _pageRepository.GetPageByTitleAsync(title).GetAwaiter().GetResult();
if (page != null)
{
string encodedTitle = EncodePageTitle(page.Title);
UrlActionContext actionContext = new UrlActionContext()
{
Action = "Index",
Controller = "Wiki",
Values = new { id = page.Id, title = encodedTitle }
};
href = _urlHelper.Action(actionContext);
href += querystringAndAnchor;
}
else
{
// e.g. /pages/new?title=xyz
UrlActionContext actionContext = new UrlActionContext()
{
Action = "New",
Controller = "Pages",
Values = new { title = title }
};
href = _urlHelper.Action(actionContext);
htmlLinkTag.CssClass = "missing-page-link";
}
htmlLinkTag.Href = href;
htmlLinkTag.Target = "";
}