Jint Set value to javascript variable

[HakanKaraoglu]

Hi,

I have a method like the one below and it works like a rule engine. Is it possible to give the object itself as a js class?

          var ruleResult = false;

           var ruleFeeder = new RuleFeeder
           {
               UserName = !string.IsNullOrEmpty(feederProxy.Name) ? Asciifier.Asciify(feederProxy.Name) : string.Empty,
               Name = !string.IsNullOrEmpty(feederProxy.FullName) ? Asciifier.Asciify(feederProxy.FullName) : string.Empty,
               FollowerCount = feederProxy.FollewerCount > 0 ? feederProxy.FollewerCount : 0
           };

           var ruleFeed = new RuleFeed
           {
               Text = feedProxy.AsciifiedSearchField,
               Lang = feedProxy.Language.ToString(),
               FeedType = feedProxy.FeedType
           };
           
           if (feedProxy.Sentiment != null) { ruleFeed.Sentiment = feedProxy.Sentiment.Value; }
           ruleFeed.Author = !string.IsNullOrEmpty(feederProxy.Name) ? feederProxy.Name : string.Empty;
           ruleFeed.Source = sourceId;
           ruleFeed.Feeder = ruleFeeder;

           var ruleKeywords = new RuleKeywords { keywords = feedKeywords };

           ruleFeed.Keywords = ruleKeywords;

           _engine = new Engine(clr => clr.AllowClr().CatchClrExceptions());
           _engine.Execute("String.prototype.contains = function(str) { return this.toLowerCase().indexOf(str) !== -1; };");

           var allRuleFields = typeof(RuleFeed).GetProperties().ToList();
           foreach (var rule in allRuleFields)
           {
               _engine.SetValue(rule.Name.ToLowerInvariant(), rule.GetValue(ruleFeed));
           }

           JsValue result = _engine.Execute(ruleExpression).GetCompletionValue();

           if (result.IsBoolean())
           {
               ruleResult = result.AsBoolean();
           }

           return Task.FromResult(ruleResult);

As a solution, I found all the properties of the RuleFeed object by going around and setting the fields one by one, but I guess it was not a very good solution. This is actually the part where I am troubled. There is reflection here and I guess this causes a performance. What i want to do is just run the incoming rule statement

In short, I do this, I change all the properties of the object to lowercase, the rule is created like this because then I throw it to values on the engine side and then run the rule set.

 var allRuleFields = typeof(RuleFeed).GetProperties().ToList();
 foreach (var rule in allRuleFields)
            {
                _engine.SetValue(rule.Name.ToLowerInvariant(), rule.GetValue(ruleFeed));
            }

Sample data set:

{
   "Text":"istanbulda yurtta kalirken lessismomi",
   "Lang":"tr",
   "Sentiment":2,
   "Author":"lessismomi",
   "Source":1,
   "FeedType":"Tweet",
   "Feeder":{
      "Name":"tugbacan",
      "UserName":"lessismomi",
      "FollowerCount":555
   },
   "Keywords":{
      "keywords":[
         {
            "WorkSpaceId":66,
            "Keyword":{
               "Id":358,
               "Text":"deneme"
            }
         }
      ]
   }
}

Sample rule set: text.contains ('test1') && keywords.hasId (27117) && sentiment == 1

[lahma]

The main project README contains some samples of .NET interop and there's also a big set of tests in InteropTests.cs. You should be able to engine.SetValue your object and then access it's methods and properties.