Examples

The example below shows how to use the rule engine to apply a sample rule on a specific fact. Rules fed into the rule engine may be as Array of rules or as individual rule objects.

//import the package
var RuleEngine = require('node-rules');

//define the rules
var rules = [{
	"condition": function(R) {
		R.when(this && (this.transactionTotal < 500));
	},
	"consequence": function(R) {
		this.result = false;
		R.stop();
	}
}];
/*as you can see above we removed the priority 
and on properties for this example as they are optional.*/ 

//sample fact to run the rules on	
var fact = {
    "userIP": "27.3.4.5",
    "name":"user4",
    "application":"MOB2",
    "userLoggedIn":true,
    "transactionTotal":400,
    "cardType":"Credit Card",
};

//initialize the rule engine
var R = new RuleEngine(rules);

//Now pass the fact on to the rule engine for results
R.execute(fact,function(result){ 

	if(result.result) 
		console.log("\n-----Payment Accepted----\n"); 
	else 
		console.log("\n-----Payment Rejected----\n");
	
});