Merge pull request #133 from mithunsatheesh/9.0.0

9.1.1

Author: mithunsatheesh

examples/node.js/1.SimpleRule.js

@@ -1,16 +1,17 @@
-const { RuleEngine } = require("../../dist/index.js");
+const { RuleEngine } = require("node-rules");
 
 /* Sample Rule to block a transaction if its below 500 */
 var rule = {
-  condition: function (R) {
-    R.when(this.transactionTotal < 500);
+  condition: function (R, fact) {
+    R.when(fact.transactionTotal < 500);
   },
-  consequence: function (R) {
-    this.result = false;
-    this.reason = "The transaction was blocked as it was less than 500";
+  consequence: function (R, fact) {
+    fact.result = false;
+    fact.reason = `The transaction was blocked as the transaction total of ${fact.transactionTotal} was less than threshold 500`;
     R.stop();
   },
 };
+
 /* Creating Rule Engine instance and registering rule */
 var R = new RuleEngine();
 R.register(rule);
@@ -21,8 +22,9 @@ var fact = {
   transactionTotal: 400,
   cardType: "Credit Card",
 };
+
 R.execute(fact, function (data) {
-  if (data.result) {
+  if (data.result !== false) {
     console.log("Valid transaction");
   } else {
     console.log("Blocked Reason:" + data.reason);

examples/node.js/2.MultipleRules.js

@@ -1,4 +1,4 @@
-const { RuleEngine } = require("../../dist/index.js");
+const { RuleEngine } = require("node-rules");
 
 /* Set of Rules to be applied
 First blocks a transaction if less than 500
@@ -8,22 +8,22 @@ Rules will be applied as per their index in the array.
 If you need to enforce priority manually, then see examples with prioritized rules */
 var rules = [
   {
-    condition: function (R) {
-      R.when(this.transactionTotal < 500);
+    condition: function (R, fact) {
+      R.when(fact.transactionTotal < 500);
     },
-    consequence: function (R) {
-      this.result = false;
-      this.reason = "The transaction was blocked as it was less than 500";
+    consequence: function (R, fact) {
+      fact.result = false;
+      fact.reason = "The transaction was blocked as it was less than 500";
       R.stop(); //stop if matched. no need to process next rule.
     },
   },
   {
-    condition: function (R) {
-      R.when(this.cardType === "Debit");
+    condition: function (R, fact) {
+      R.when(fact.cardType === "Debit");
     },
-    consequence: function (R) {
-      this.result = false;
-      this.reason =
+    consequence: function (R, fact) {
+      fact.result = false;
+      fact.reason =
         "The transaction was blocked as debit cards are not allowed";
       R.stop();
     },
@@ -40,7 +40,7 @@ var fact = {
   cardType: "Debit",
 };
 R.execute(fact, function (data) {
-  if (data.result) {
+  if (data.result !== false) {
     console.log("Valid transaction");
   } else {
     console.log("Blocked Reason:" + data.reason);

examples/node.js/3.CascadingRules.js

@@ -1,24 +1,24 @@
-const { RuleEngine } = require("../../dist/index.js");
+const { RuleEngine } = require("node-rules");
 
 /* Here we can see a rule which upon matching its condition,
 does some processing and passes it to other rules for processing */
 var rules = [
   {
-    condition: function (R) {
-      R.when(this.application === "MOB");
+    condition: function (R, fact) {
+      R.when(fact.application === "MOB");
     },
-    consequence: function (R) {
-      this.isMobile = true;
+    consequence: function (R, fact) {
+      fact.isMobile = true;
       R.next(); //we just set a value on to fact, now lests process rest of rules
     },
   },
   {
-    condition: function (R) {
-      R.when(this.cardType === "Debit");
+    condition: function (R, fact) {
+      R.when(fact.cardType === "Debit");
     },
-    consequence: function (R) {
-      this.result = false;
-      this.reason =
+    consequence: function (R, fact) {
+      fact.result = false;
+      fact.reason =
         "The transaction was blocked as debit cards are not allowed";
       R.stop();
     },
@@ -27,15 +27,16 @@ var rules = [
 /* Creating Rule Engine instance and registering rule */
 var R = new RuleEngine();
 R.register(rules);
-/* Fact with more than 500 as transaction but a Debit card, and this should be blocked */
+
+/* Fact is mobile with Credit card type. This should go through */
 var fact = {
   name: "user4",
   application: "MOB",
   transactionTotal: 600,
   cardType: "Credit",
 };
 R.execute(fact, function (data) {
-  if (data.result) {
+  if (data.result !== false) {
     console.log("Valid transaction");
   } else {
     console.log("Blocked Reason:" + data.reason);

examples/node.js/4.PrioritizedRules.js

@@ -1,26 +1,26 @@
-const { RuleEngine } = require("../../dist/index.js");
+const { RuleEngine } = require("node-rules");
 
 /* Set of Rules to be applied */
 var rules = [
   {
     priority: 4,
-    condition: function (R) {
-      R.when(this.transactionTotal < 500);
+    condition: function (R, fact) {
+      R.when(fact.transactionTotal < 500);
     },
-    consequence: function (R) {
-      this.result = false;
-      this.reason = "The transaction was blocked as it was less than 500";
+    consequence: function (R, fact) {
+      fact.result = false;
+      fact.reason = "The transaction was blocked as it was less than 500";
       R.stop();
     },
   },
   {
     priority: 10, // this will apply first
-    condition: function (R) {
-      R.when(this.cardType === "Debit");
+    condition: function (R, fact) {
+      R.when(fact.cardType === "Debit");
     },
-    consequence: function (R) {
-      this.result = false;
-      this.reason =
+    consequence: function (R, fact) {
+      fact.result = false;
+      fact.reason =
         "The transaction was blocked as debit cards are not allowed";
       R.stop();
     },
@@ -38,7 +38,7 @@ var fact = {
 };
 /* This fact will be blocked by the Debit card rule as its of more priority */
 R.execute(fact, function (data) {
-  if (data.result) {
+  if (data.result !== false) {
     console.log("Valid transaction");
   } else {
     console.log("Blocked Reason:" + data.reason);

examples/node.js/5.RecurssionWithRules.js

@@ -1,6 +1,7 @@
-const { RuleEngine } = require("../../dist/index.js");
+const { RuleEngine } = require("node-rules");
 
 /* Sample Rule to block a transaction if its below 500 */
+/* Also validates if the legacy syntax of operating on this is supported in Rule engine */
 var rule = {
   condition: function (R) {
     R.when(this.someval < 10);