/// <summary>
/// Generates meta tags for the given content.
/// </summary>
/// <param name="app">The application service</param>
/// <param name="content">The content</param>
/// <param name="meta">If meta tags should be generated</param>
/// <param name="opengraph">If open graph tags should be generated</param>
/// <param name="generator">If generator tag should be generated</param>
/// <returns>The meta tags</returns>
public static HtmlString MetaTags(this IApplicationService app, IMeta content, bool meta = true, bool opengraph = true, bool generator = true)
{
var sb = new StringBuilder();
if (meta)
{
// Generate meta tags
if (!string.IsNullOrWhiteSpace(content.MetaKeywords))
{
sb.AppendLine($"<meta name=\"keywords\" value=\"{ content.MetaKeywords }\">");
}
if (!string.IsNullOrWhiteSpace(content.MetaDescription))
{
sb.AppendLine($"<meta name=\"description\" value=\"{ content.MetaDescription }\">");
}
}
if (generator)
{
// Generate generator tag
sb.AppendLine($"<meta name=\"generator\" value=\"Piranha CMS { Piranha.Utils.GetAssemblyVersion(typeof(Piranha.App).Assembly) }\">");
}
if (opengraph)
{
// Generate open graph tags
sb.AppendLine($"<meta name=\"og:type\" value=\"article\">");
sb.AppendLine($"<meta name=\"og:title\" value=\"{ OgTitle(content) }\">");
if (content.OgImage != null && content.OgImage.HasValue)
{
sb.AppendLine($"<meta name=\"og:image\" value=\"{ app.AbsoluteUrl(content.OgImage) }\">");
}
if (!string.IsNullOrWhiteSpace(OgDescription(content)))
{
sb.AppendLine($"<meta name=\"og:description\" value=\"{ OgDescription(content) }\">");
}
}
return(new HtmlString(sb.ToString()));
}