fix: can not parse index operator in matcher

Casbin.UnitTests/Fixtures/TestModelFixture.cs

@@ -91,6 +91,10 @@ public class TestModelFixture
     public static readonly string BackslashLineFeedModelText = ReadTestFile("backslash_feed_model.conf");
     public static readonly string BackslashLineFeedPolicyText = ReadTestFile("backslash_feed_policy.csv");
 
+    // https://github.com/casbin/Casbin.NET/issues/353
+    public static readonly string RbacWithIndexMatcherModelText = ReadTestFile("rbac_with_index_matcher_model.conf");
+    public static readonly string RbacWithIndexMatcherPolicyText = ReadTestFile("rbac_with_index_matcher_policy.csv");
+
     public static IModel GetNewAbacModel() => GetNewTestModel(AbacModelText);
 
     public static IModel GetNewAbacWithEvalModel() => GetNewTestModel(AbacWithEvalModelText, AbacWithEvalPolicyText);

Casbin.UnitTests/ModelTests/ModelTest.cs

@@ -1,4 +1,6 @@
-using System.Threading.Tasks;
+using System.Collections.Generic;
+using System.IO;
+using System.Threading.Tasks;
 using Casbin.Model;
 using Casbin.UnitTests.Fixtures;
 using Casbin.UnitTests.Mock;
@@ -728,6 +730,28 @@ public void TestAccidentalCacheRead()
         TestEnforce(e, "alice", "data", "1read", false);
     }
 
+    [Fact]
+    public void TestRbacWithIndexMatcher()
+    {
+        Enforcer e = new(TestModelFixture.GetNewTestModel(
+            TestModelFixture.RbacWithIndexMatcherModelText,
+            TestModelFixture.RbacWithIndexMatcherPolicyText));
+        e.BuildRoleLinks();
+        var rule = new Dictionary<string, Dictionary<string, string>>
+        {
+            ["CompanyData"] = new() { ["CompanyIsActive"] = "True", ["BusinessRole"] = "Role1" }
+        };
+        Assert.True(e.Enforce(rule, "WebApp", "/api/transactions/getTransactions", "POST"));
+        Assert.False(e.Enforce(rule, "Admin", "/api/transactions/getTransactions", "POST"));
+
+        rule = new Dictionary<string, Dictionary<string, string>>
+        {
+            ["CompanyData"] = new() { ["CompanyIsActive"] = "False", ["BusinessRole"] = "Role1" }
+        };
+        Assert.False(e.Enforce(rule, "WebApp", "/api/transactions/getTransactions", "POST"));
+        Assert.True(e.Enforce(rule, "Admin", "/api/transactions/getTransactions", "POST"));
+    }
+
     public class TestResource
     {
         public TestResource(string name, string owner)

Casbin.UnitTests/examples/rbac_with_index_matcher_model.conf

@@ -0,0 +1,14 @@
+[request_definition]
+r = rule, sub, obj, act
+
+[policy_definition]
+p = sub_rule, sub, obj, act
+
+[role_definition]
+g = _, _
+
+[policy_effect]
+e = some(where (p.eft == allow)) && !some(where (p.eft == deny))
+
+[matchers]
+m = eval(p.sub_rule) && g(r.sub, p.sub) && keyMatch3(r.obj, p.obj) && (p.act == "*" || regexMatch(r.act, p.act))

Casbin.UnitTests/examples/rbac_with_index_matcher_policy.csv

@@ -0,0 +1,2 @@
+p, r.rule["CompanyData"]["CompanyIsActive"] == "True" && (r.rule["CompanyData"]["BusinessRole"] == "Role1" || r.rule["CompanyData"]["BusinessRole"] == "Role2"), WebApp, /api/transactions/getTransactions, POST
+p, r.rule["CompanyData"]["CompanyIsActive"] == "False" && (r.rule["CompanyData"]["BusinessRole"] == "Role1" || r.rule["CompanyData"]["BusinessRole"] == "Role2"), Admin, /api/transactions/getTransactions, POST

Casbin/EnforceView.cs

@@ -118,8 +118,8 @@ public static EnforceView CreateWithMatcher(
         [SuppressMessage("ReSharper", "UseDeconstruction")]
         public static string TransformMatcher(in EnforceView view, string matcher)
         {
-            string perfix = @"(?<=(\s|^|\||&|!|=|\(|\)|<|>|,|\+|-|\*|\/|\\)\s*)";
-            string suffix = @"(?=\s*(\s|$|\||&|!|=|\(|\)|<|>|,|\+|-|\*|\/|\\|\.|in))";
+            string perfix = @"(?<=(\s|^|\||&|!|=|\(|\)|<|>|,|\+|-|\*|\/|\\|\[)\s*)";
+            string suffix = @"(?=\s*(\s|$|\||&|!|=|\(|\)|<|>|,|\+|-|\*|\/|\\|\[|\]|\.|in))";
             if (view.SupportGeneric is false)
             {
                 foreach (KeyValuePair<string, int> tokenPair in view.RequestAssertion.Tokens)