public override CacheDependency GetCacheDependency(string virtualPath, IEnumerable virtualPathDependencies, DateTime utcStart)
{
var styleResult = ThemeHelper.IsStyleSheet(virtualPath);
if (styleResult == null)
{
return(GetCacheDependencyInternal(virtualPath, virtualPathDependencies, utcStart));
}
else
{
if (styleResult.IsCss)
{
// it's a static css file (no bundle, no sass/less)
return(GetCacheDependencyInternal(virtualPath, virtualPathDependencies, utcStart));
}
var arrPathDependencies = virtualPathDependencies.Cast <string>().ToArray();
// determine the virtual themevars.(scss|less) import reference
var themeVarsFile = arrPathDependencies.Where(x => ThemeHelper.PathIsThemeVars(x)).FirstOrDefault();
var moduleImportsFile = arrPathDependencies.Where(x => ThemeHelper.PathIsModuleImports(x)).FirstOrDefault();
if (themeVarsFile.IsEmpty() && moduleImportsFile.IsEmpty())
{
// no themevars or moduleimports import... so no special considerations here
return(GetCacheDependencyInternal(virtualPath, virtualPathDependencies, utcStart));
}
// exclude the special imports from the file dependencies list,
// 'cause this one cannot be monitored by the physical file system
var fileDependencies = arrPathDependencies.Except((new string[] { themeVarsFile, moduleImportsFile }).Where(x => x.HasValue()));
if (arrPathDependencies.Any())
{
int storeId = ThemeHelper.ResolveCurrentStoreId();
var theme = ThemeHelper.ResolveCurrentTheme();
// invalidate the cache when variables change
string cacheKey = FrameworkCacheConsumer.BuildThemeVarsCacheKey(theme.ThemeName, storeId);
var cacheDependency = new CacheDependency(MapDependencyPaths(fileDependencies), new string[] { cacheKey }, utcStart);
return(cacheDependency);
}
return(null);
}
}
internal static IEnumerable <string> RemoveVirtualImports(IEnumerable <string> virtualPathDependencies)
{
Guard.NotNull(virtualPathDependencies, nameof(virtualPathDependencies));
// determine the virtual themevars scss import reference
var themeVarsFile = virtualPathDependencies.Where(x => ThemeHelper.PathIsThemeVars(x)).FirstOrDefault();
var moduleImportsFile = virtualPathDependencies.Where(x => ThemeHelper.PathIsModuleImports(x)).FirstOrDefault();
if (themeVarsFile == null && moduleImportsFile == null)
{
// no themevars or moduleimports import... so no special considerations here
return(virtualPathDependencies);
}
// exclude the special imports from the file dependencies list,
// 'cause this one cannot be monitored by the physical file system
return(virtualPathDependencies
.Except((new string[] { themeVarsFile, moduleImportsFile })
.Where(x => x.HasValue()))
.ToArray());
}