chore: add support for accessing idType (#446)

I'm attempting to standardize the Kong APIs. This SDK is missing idType
on all configs. Adding it to FeatureGate as a start

Author: daniel-statsig

src/main/kotlin/com/statsig/sdk/ConfigEvaluation.kt

@@ -17,6 +17,7 @@ class ConfigEvaluation(
     var forwardAllExposures: Boolean = false,
     var samplingRate: Long? = null,
     var isActive: Boolean = false,
+    var idType: String = Const.EMPTY_STR,
 ) {
     internal var isDelegate: Boolean = false
 

src/main/kotlin/com/statsig/sdk/DataTypes.kt

@@ -82,6 +82,7 @@ data class APIFeatureGate(
     val secondaryExposures: ArrayList<Map<String, String>> = arrayListOf(),
     val reason: EvaluationReason?,
     val evaluationDetails: EvaluationDetails?,
+    @SerializedName("id_type") val idType: String?,
 )
 
 internal data class APIDynamicConfig(

src/main/kotlin/com/statsig/sdk/Evaluator.kt

@@ -502,6 +502,7 @@ internal class Evaluator(
         ctx.evaluation.evaluationDetails = createEvaluationDetails(specStore.getEvaluationReason())
         ctx.evaluation.configVersion = config.version
         ctx.evaluation.isActive = config.isActive
+        ctx.evaluation.idType = config.idType
 
         if (!config.enabled) {
             logger.debug("${config.name} is not enabled.")
@@ -573,6 +574,7 @@ internal class Evaluator(
         ctx.evaluation.jsonValue = config.defaultValue
         ctx.evaluation.ruleID = Const.DEFAULT
         ctx.evaluation.groupName = null
+        ctx.evaluation.idType = config.idType
     }
 
     private fun evaluateDelegate(

src/main/kotlin/com/statsig/sdk/Statsig.kt

@@ -582,7 +582,7 @@ class Statsig {
         @JvmOverloads
         fun getFeatureGate(user: StatsigUser, gateName: String, option: GetFeatureGateOptions? = null): APIFeatureGate {
             if (!checkInitialized()) {
-                return APIFeatureGate(gateName, false, null, arrayListOf(), EvaluationReason.UNINITIALIZED, null)
+                return APIFeatureGate(gateName, false, null, arrayListOf(), EvaluationReason.UNINITIALIZED, null, null)
             }
             return statsigServer.getFeatureGate(user, gateName, option)
         }

src/main/kotlin/com/statsig/sdk/StatsigServer.kt

@@ -430,7 +430,7 @@ private class StatsigServerImpl() :
 
     override fun getFeatureGate(user: StatsigUser, gateName: String): APIFeatureGate {
         if (!isSDKInitialized()) {
-            return APIFeatureGate(gateName, false, null, arrayListOf(), EvaluationReason.UNINITIALIZED, null)
+            return APIFeatureGate(gateName, false, null, arrayListOf(), EvaluationReason.UNINITIALIZED, null, null)
         }
         return errorBoundary.captureSync(
             "getFeatureGate",
@@ -444,16 +444,17 @@ private class StatsigServerImpl() :
                     result.secondaryExposures,
                     result.evaluationDetails?.reason,
                     result.evaluationDetails,
+                    result.idType
                 )
             },
-            { return@captureSync APIFeatureGate(gateName, false, null, arrayListOf(), EvaluationReason.DEFAULT, null) },
+            { return@captureSync APIFeatureGate(gateName, false, null, arrayListOf(), EvaluationReason.DEFAULT, null, null) },
             configName = gateName,
         )
     }
 
     override fun getFeatureGate(user: StatsigUser, gateName: String, option: GetFeatureGateOptions?): APIFeatureGate {
         if (!isSDKInitialized()) {
-            return APIFeatureGate(gateName, false, null, arrayListOf(), EvaluationReason.UNINITIALIZED, null)
+            return APIFeatureGate(gateName, false, null, arrayListOf(), EvaluationReason.UNINITIALIZED, null, null)
         }
         return errorBoundary.captureSync(
             "getFeatureGate",
@@ -469,9 +470,10 @@ private class StatsigServerImpl() :
                     result.secondaryExposures,
                     result.evaluationDetails?.reason,
                     result.evaluationDetails,
+                    result.idType
                 )
             },
-            { return@captureSync APIFeatureGate(gateName, false, null, arrayListOf(), EvaluationReason.DEFAULT, null) },
+            { return@captureSync APIFeatureGate(gateName, false, null, arrayListOf(), EvaluationReason.DEFAULT, null, null) },
             configName = gateName,
         )
     }

src/test/java/com/statsig/sdk/ExceptionHandlerTest.kt

@@ -26,7 +26,7 @@ class ExceptionHandlerTest {
         user = StatsigUser("abc")
         eventLogInputCompletable = CompletableDeferred()
 
-        val mockGateResponse = APIFeatureGate("a_gate", true, "ruleID", arrayListOf(), EvaluationReason.DEFAULT, null)
+        val mockGateResponse = APIFeatureGate("a_gate", true, "ruleID", arrayListOf(), EvaluationReason.DEFAULT, null, null)
         val mockResponseBody = gson.toJson(mockGateResponse)
 
         val downloadConfigSpecsResponse =

src/test/java/com/statsig/sdk/ExposureLoggingTest.kt

@@ -28,7 +28,7 @@ class ExposureLoggingTest {
         user = StatsigUser("abc")
         eventLogInputCompletable = CompletableDeferred()
 
-        val mockGateResponse = APIFeatureGate("a_gate", true, "ruleID", arrayListOf(), EvaluationReason.DEFAULT, null)
+        val mockGateResponse = APIFeatureGate("a_gate", true, "ruleID", arrayListOf(), EvaluationReason.DEFAULT, null, null)
         val mockResponseBody = gson.toJson(mockGateResponse)
 
         val downloadConfigSpecsResponse =

src/test/java/com/statsig/sdk/ExposureLoggingTestJava.java

@@ -39,7 +39,7 @@ public void setUp() {
         user = new StatsigUser("abc");
         eventLogInputCompletable = new CompletableFuture();
 
-        APIFeatureGate mockGateResponse = new APIFeatureGate("a_gate", true, "ruleID", new ArrayList<>(), EvaluationReason.DEFAULT, null);
+        APIFeatureGate mockGateResponse = new APIFeatureGate("a_gate", true, "ruleID", new ArrayList<>(), EvaluationReason.DEFAULT, null, null);
         String mockResponseBody = gson.toJson(mockGateResponse);
 
         String downloadConfigSpecsResponse =