/// <summary>
/// Throwing the entire CSS block inside the Critical head block is not the most streamlined method. Ideally the web team would use the NPM Critical
/// package. However This is fallback for the lazy web team that ultimately just won't do that.
/// Loop over the CSS assets, download the contents and append to one big Critical block
/// </summary>
/// <param name="assetLinks"></param>
/// <returns></returns>
private static string BuildEntireCssBlock(SpeedyAssetLinks assetLinks)
{
StringBuilder entireCriticalBlock = new StringBuilder();
// Lookup the filters
var nameValueListString = SpeedyGenerationSettings.GetGlobalSettingsItemFromContext()[SpeedyConstants.GlobalSettings.Fields.CSSFilter];
//Converts the string to NameValueCollection
System.Collections.Specialized.NameValueCollection nameValueList = Sitecore.Web.WebUtil.ParseUrlParameters(nameValueListString);
foreach (var style in assetLinks.PlainStyles)
{
ApplyStyleFile(nameValueList, entireCriticalBlock, style);
}
entireCriticalBlock = entireCriticalBlock.Replace("font-family:", "font-display:swap;font-family:");
return(entireCriticalBlock.ToString());
}