fix(exists-condition) Fixed exists comparison for leaf condition. (#185)

pkg/decision/evaluator/matchers/exists.go

@@ -28,11 +28,5 @@ type ExistsMatcher struct {
 
 // Match returns true if the user's attribute is in the condition
 func (m ExistsMatcher) Match(user entities.UserContext) (bool, error) {
-
-	_, err := user.GetStringAttribute(m.Condition.Name)
-	if err != nil {
-		return false, nil
-	}
-
-	return true, nil
+	return user.CheckAttributeExists(m.Condition.Name), nil
 }

pkg/entities/user_context.go

@@ -31,6 +31,15 @@ type UserContext struct {
 	Attributes map[string]interface{}
 }
 
+// CheckAttributeExists returns whether the specified attribute name exists in the attributes map.
+func (u UserContext) CheckAttributeExists(attrName string) bool {
+	if value, ok := u.Attributes[attrName]; ok && value != nil {
+		return true
+	}
+
+	return false
+}
+
 // GetStringAttribute returns the string value for the specified attribute name in the attributes map. Returns error if not found.
 func (u UserContext) GetStringAttribute(attrName string) (string, error) {
 	if value, ok := u.Attributes[attrName]; ok {

pkg/entities/user_context_test.go

@@ -23,6 +23,28 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
+func TestUserAttributeExists(t *testing.T) {
+	userContext := UserContext{
+		Attributes: map[string]interface{}{
+			"string_foo": "foo",
+			"bool_true":  true,
+			"bool_false": false,
+			"null_value": nil,
+		},
+	}
+
+	// Test happy path
+	assert.Equal(t, true, userContext.CheckAttributeExists("string_foo"))
+	assert.Equal(t, true, userContext.CheckAttributeExists("bool_true"))
+	assert.Equal(t, true, userContext.CheckAttributeExists("bool_false"))
+
+	// Test non-existent attr name
+	assert.Equal(t, false, userContext.CheckAttributeExists("invalid"))
+
+	// Test null value
+	assert.Equal(t, false, userContext.CheckAttributeExists("null_value"))
+}
+
 func TestUserAttributesGetStringAttribute(t *testing.T) {
 	userContext := UserContext{
 		Attributes: map[string]interface{}{