refactor: Migrate Internal CoreCallback class to kotlin (#517)

android-core/src/main/kotlin/com/mparticle/internal/CoreCallbacks.kt

@@ -0,0 +1,63 @@
+package com.mparticle.internal
+
+import android.app.Activity
+import android.net.Uri
+import androidx.annotation.WorkerThread
+import com.mparticle.MParticleOptions.DataplanOptions
+import org.json.JSONArray
+import java.lang.ref.WeakReference
+
+interface CoreCallbacks {
+    fun isBackgrounded(): Boolean
+
+    fun getUserBucket(): Int
+
+    fun isEnabled(): Boolean
+
+    fun setIntegrationAttributes(kitId: Int, integrationAttributes: Map<String, String>)
+
+    fun getIntegrationAttributes(kitId: Int): Map<String, String>?
+
+    fun getCurrentActivity(): WeakReference<Activity>?
+
+    @WorkerThread
+    fun getLatestKitConfiguration(): JSONArray?
+
+    fun getDataplanOptions(): DataplanOptions?
+
+    fun isPushEnabled(): Boolean
+
+    fun getPushSenderId(): String?
+
+    fun getPushInstanceId(): String?
+
+    fun getLaunchUri(): Uri?
+
+    fun getLaunchAction(): String?
+
+    fun getKitListener(): KitListener?
+
+    interface KitListener {
+        fun kitFound(kitId: Int)
+
+        fun kitConfigReceived(kitId: Int, configuration: String?)
+
+        fun kitExcluded(kitId: Int, reason: String?)
+
+        fun kitStarted(kitId: Int)
+        fun onKitApiCalled(kitId: Int, used: Boolean?, vararg objects: Any?)
+        fun onKitApiCalled(methodName: String?, kitId: Int, used: Boolean?, vararg objects: Any?)
+
+        companion object {
+            @JvmField
+            val EMPTY: KitListener = object : KitListener {
+                override fun kitFound(kitId: Int) {}
+                override fun kitConfigReceived(kitId: Int, configuration: String?) {}
+                override fun kitExcluded(kitId: Int, reason: String?) {}
+                override fun kitStarted(kitId: Int) {}
+                override fun onKitApiCalled(kitId: Int, used: Boolean?, vararg objects: Any?) {}
+                override fun onKitApiCalled(methodName: String?, kitId: Int, used: Boolean?, vararg objects: Any?) {}
+            }
+        }
+    }
+}

android-core/src/test/kotlin/com/mparticle/internal/KitFrameworkWrapperTest.kt

@@ -89,8 +89,8 @@ class KitFrameworkWrapperTest {
             true,
             Mockito.mock(MParticleOptions::class.java)
         )
-        Mockito.`when`(wrapper.mCoreCallbacks.pushInstanceId).thenReturn("instanceId")
-        Mockito.`when`(wrapper.mCoreCallbacks.pushSenderId).thenReturn("1234545")
+        Mockito.`when`(wrapper.mCoreCallbacks.getPushInstanceId()).thenReturn("instanceId")
+        Mockito.`when`(wrapper.mCoreCallbacks.getPushSenderId()).thenReturn("1234545")
         MParticle.setInstance(MockMParticle())
         wrapper.replayEvents()
         val mockKitManager = Mockito.mock(KitManager::class.java)
@@ -594,15 +594,15 @@ class KitFrameworkWrapperTest {
             mockConfigManager,
             mockAppStateManager
         )
-        Assert.assertEquals(mockActivity, coreCallbacks.currentActivity.get())
-        Assert.assertEquals(mockKitConfiguration, coreCallbacks.latestKitConfiguration)
-        Assert.assertEquals(mockLaunchUri, coreCallbacks.launchUri)
-        Assert.assertEquals(mockPushInstanceId, coreCallbacks.pushInstanceId)
-        Assert.assertEquals(mockPushSenderId, coreCallbacks.pushSenderId)
-        Assert.assertEquals(mockUserBucket.toLong(), coreCallbacks.userBucket.toLong())
-        Assert.assertEquals(isBackground, coreCallbacks.isBackgrounded)
-        Assert.assertEquals(isEnabled, coreCallbacks.isEnabled)
-        Assert.assertEquals(isPushEnabled, coreCallbacks.isPushEnabled)
+        Assert.assertEquals(mockActivity, coreCallbacks.getCurrentActivity()?.get())
+        Assert.assertEquals(mockKitConfiguration, coreCallbacks.getLatestKitConfiguration())
+        Assert.assertEquals(mockLaunchUri, coreCallbacks.getLaunchUri())
+        Assert.assertEquals(mockPushInstanceId, coreCallbacks.getPushInstanceId())
+        Assert.assertEquals(mockPushSenderId, coreCallbacks.getPushSenderId())
+        Assert.assertEquals(mockUserBucket.toLong(), coreCallbacks.getUserBucket().toLong())
+        Assert.assertEquals(isBackground, coreCallbacks.isBackgrounded())
+        Assert.assertEquals(isEnabled, coreCallbacks.isEnabled())
+        Assert.assertEquals(isPushEnabled, coreCallbacks.isPushEnabled())
         Assert.assertEquals(mockIntegrationAttributes1, coreCallbacks.getIntegrationAttributes(1))
         Assert.assertEquals(mockIntegrationAttributes2, coreCallbacks.getIntegrationAttributes(2))
     }