public Expression <Func <SearchResultItem, bool> > GetPredicatesFromRules(IProviderSearchContext context, string rawRules, Database db)
{
Assert.ArgumentNotNull(db, nameof(db));
var expression = PredicateBuilder.True <SearchResultItem>();
Sitecore.ContentSearch.Rules.QueryableRuleFactory ruleFactory = new Sitecore.ContentSearch.Rules.QueryableRuleFactory();
var rules = ruleFactory.ParseRules <Sitecore.ContentSearch.Rules.QueryableRuleContext <SearchResultItem> >(db, rawRules);
if (!rules.Rules.Any())
{
return(null);
}
foreach (var rule in rules.Rules)
{
if (rule.Condition != null)
{
var ruleContext = new Sitecore.ContentSearch.Rules.QueryableRuleContext <SearchResultItem>(context);
var stack = new RuleStack();
rule.Condition.Evaluate(ruleContext, stack);
rule.Execute(ruleContext);
if (stack.Any())
{
expression = ruleContext.Where;
}
}
}
return(expression);
}
public static Expression <Func <SearchResultItem, bool> > ProcessQueryRules(IProviderSearchContext context, string queryFilter, SearchOperation operation)
{
var predicate = operation == SearchOperation.Or
? PredicateBuilder.False <SearchResultItem>()
: PredicateBuilder.True <SearchResultItem>();
var crawler = context.Index.Crawlers.FirstOrDefault(c => c is SitecoreItemCrawler);
if (crawler == null)
{
return(predicate);
}
var database = ((SitecoreItemCrawler)crawler).Database;
if (string.IsNullOrEmpty(database))
{
return(predicate);
}
var ruleFactory = new Sitecore.ContentSearch.Rules.QueryableRuleFactory();
var rules = ruleFactory.ParseRules <Sitecore.ContentSearch.Rules.QueryableRuleContext <SearchResultItem> >(Factory.GetDatabase(database), queryFilter);
foreach (var rule in rules.Rules)
{
if (rule.Condition == null)
{
continue;
}
var ruleContext = new Sitecore.ContentSearch.Rules.QueryableRuleContext <SearchResultItem>(context);
var stack = new RuleStack();
rule.Condition.Evaluate(ruleContext, stack);
rule.Execute(ruleContext);
if (stack.Any())
{
predicate = ruleContext.Where;
}
}
return(predicate);
}