public static IQueryable <TModel> ApplyTagsFilter <TModel>(this IQueryable <TModel> query, IFilterByTags tagsFilter,
Func <string, Expression <Func <TModel, bool> > > filterByTagName)
{
if (tagsFilter.FilterByTags != null && tagsFilter.FilterByTags.Any(tag => !string.IsNullOrWhiteSpace(tag)))
{
var predicate = (tagsFilter.FilterByTagsConnector == FilterConnector.Or)
? PredicateBuilder.False <TModel>()
: PredicateBuilder.True <TModel>();
foreach (var tagName in tagsFilter.FilterByTags)
{
if (!string.IsNullOrWhiteSpace(tagName))
{
Expression <Func <TModel, bool> > whereClause = filterByTagName(tagName);
if (tagsFilter.FilterByTagsConnector == FilterConnector.Or)
{
predicate = predicate.Or(whereClause);
}
else
{
predicate = predicate.And(whereClause);
}
}
}
query = query.Where(predicate);
}
return(query);
}
public static IQueryable <TModel> ApplySitemapTagsFilter <TModel>(this IQueryable <TModel> query, IFilterByTags tagsFilter)
where TModel : Sitemap
{
if (tagsFilter != null && tagsFilter.FilterByTags != null)
{
var tags = tagsFilter.FilterByTags.Where(tag => !string.IsNullOrWhiteSpace(tag)).Distinct().ToArray();
if (tags.Length > 0)
{
if (tagsFilter.FilterByTagsConnector == FilterConnector.And)
{
query = query.Where(page => page.SitemapTags.Count(pageTag => tags.Contains(pageTag.Tag.Name) && !pageTag.IsDeleted && !pageTag.Tag.IsDeleted) == tags.Length);
}
else
{
query = query.Where(page => page.SitemapTags.Any(pageTag => tags.Contains(pageTag.Tag.Name) && !pageTag.IsDeleted && !pageTag.Tag.IsDeleted));
}
}
}
return(query);
}
