public TeaserResult GenerateTeaser(
TeaserTruncationMode truncationMode,
int truncationLength,
string html,
string cacheKey,
string slug,
string languageCode)
{
var result = new TeaserResult();
result.Content = html;
result.DidTruncate = false;
return(result);
}
private ContentFilterResult FilterHtmlForList(IPost post, IProjectSettings settings, bool useTeaser)
{
var result = new ContentFilterResult();
if (useTeaser)
{
TeaserResult teaserResult = null;
string teaser = null;
if (!string.IsNullOrWhiteSpace(post.TeaserOverride))
{
if (post.ContentType == "markdown")
{
teaser = MapImageUrlsToCdn(
ConvertMarkdownToHtml(post.TeaserOverride),
settings.CdnUrl,
settings.LocalMediaVirtualPath);
}
else
{
teaser = MapImageUrlsToCdn(
post.TeaserOverride,
settings.CdnUrl,
settings.LocalMediaVirtualPath);
}
result.FilteredContent = teaser;
result.IsFullContent = false;
}
else if (!string.IsNullOrWhiteSpace(post.AutoTeaser)) // as of 2018-08-20 this gets populated on save
{
teaser = MapImageUrlsToCdn(
post.AutoTeaser,
settings.CdnUrl,
settings.LocalMediaVirtualPath);
result.FilteredContent = teaser;
result.IsFullContent = false;
}
else
{
// need to generate teaser
if (post.ContentType == "markdown")
{
var html = MapImageUrlsToCdn(
ConvertMarkdownToHtml(post.CoalesceContentToDraftContent()),
settings.CdnUrl,
settings.LocalMediaVirtualPath);
teaserResult = _teaserService.GenerateTeaser(
settings.TeaserTruncationMode,
settings.TeaserTruncationLength,
html,
post.Id,
post.Slug,
settings.LanguageCode
);
}
else
{
var html = MapImageUrlsToCdn(
post.CoalesceContentToDraftContent(),
settings.CdnUrl,
settings.LocalMediaVirtualPath);
teaserResult = _teaserService.GenerateTeaser(
settings.TeaserTruncationMode,
settings.TeaserTruncationLength,
html,
post.Id,
post.Slug,
settings.LanguageCode
);
}
result.FilteredContent = teaserResult.Content;
result.IsFullContent = !teaserResult.DidTruncate;
}
}
else
{
// using full content
if (post.ContentType == "markdown")
{
result.FilteredContent = MapImageUrlsToCdn(
ConvertMarkdownToHtml(post.CoalesceContentToDraftContent()),
settings.CdnUrl,
settings.LocalMediaVirtualPath);
}
else
{
result.FilteredContent = MapImageUrlsToCdn(
post.CoalesceContentToDraftContent(),
settings.CdnUrl,
settings.LocalMediaVirtualPath);
}
result.IsFullContent = true;
}
return(result);
}
public TeaserResult GenerateTeaser(
TeaserTruncationMode truncationMode,
int truncationLength,
string html,
string cacheKey,
string slug,
string languageCode)
{
var result = new TeaserResult();
if (string.IsNullOrWhiteSpace(html))
{
result.Content = html;
result.DidTruncate = false;
return(result);
}
// Try to get language metadata for humanizer.
var cultureInfo = CultureInfo.InvariantCulture;
if (!string.IsNullOrEmpty(languageCode))
{
try
{
cultureInfo = new CultureInfo(languageCode);
}
catch (CultureNotFoundException) { }
}
var contentLength = GetContentLength(html, truncationMode);
if (contentLength <= truncationLength)
{
result.Content = html;
result.DidTruncate = false;
return(result);
}
if (_cache != null)
{
var cachedTeaser = _cache.GetTeaser(cacheKey);
if (!string.IsNullOrEmpty(cachedTeaser))
{
result.Content = cachedTeaser;
result.DidTruncate = true;
return(result);
}
}
var isRightToLeftLanguage = cultureInfo.TextInfo.IsRightToLeft;
// Get global teaser settings.
var truncationLengthToUse = truncationLength <= 0 ? GetDefaultTeaserLength(truncationMode) : truncationLength;
// Truncate the raw content first. In general, Humanizer is smart enough to ignore tags, especially if using word truncation.
var text = TruncatePost(truncationMode, html, truncationLengthToUse, isRightToLeftLanguage);
// Don't leave dangling <p> tags.
HtmlNode.ElementsFlags["p"] = HtmlElementFlag.Closed;
var modeDesc = GetModeDescription(truncationMode);
//if we get bad output try increasing the allowed length unti it is valid
while (!IsValidMarkup(text) && truncationLengthToUse <= contentLength)
{
truncationLengthToUse += 1;
if (_log != null)
{
_log.LogWarning($"teaser truncation for post {slug}, produced invalid html, so trying again and increasing the truncation length to {truncationLengthToUse} {modeDesc}. Might be best to make an explicit teaser for this post.");
}
text = TruncatePost(truncationMode, html, truncationLengthToUse, isRightToLeftLanguage);
}
if (!IsValidMarkup(text))
{
if (_log != null)
{
_log.LogError($"failed to create valid teaser for post {slug}, so returning full content");
}
result.Content = html;
result.DidTruncate = false;
return(result);
}
if (_cache != null)
{
_cache.AddToCache(text, cacheKey);
}
var doc = new HtmlDocument();
doc.LoadHtml(text);
result.Content = doc.DocumentNode.InnerHtml;
result.DidTruncate = true;
return(result);
}