feat: improve handling of externalId response (#195)

Author: tompsota

CHANGELOG.md

@@ -5,6 +5,14 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+
+### Flutter
+
+#### Changed
+
+- Updated the internal handling of ExternalIdResult on Android (for `storeExternalId()` method)
+
 ## [7.4.0] - 2026-02-10
 - Android SDK version: 18.0.2
 - iOS SDK version: 6.13.0

android/src/main/kotlin/com/aheaditec/freerasp/Extensions.kt

@@ -3,6 +3,7 @@ package com.aheaditec.freerasp
 import android.content.Context
 import android.content.pm.PackageInfo
 import android.os.Build
+import com.aheaditec.talsec_security.security.api.ExternalIdResult
 import com.aheaditec.talsec_security.security.api.SuspiciousAppInfo
 import io.flutter.plugin.common.MethodChannel
 import com.aheaditec.freerasp.generated.PackageInfo as FlutterPackageInfo
@@ -68,3 +69,17 @@ internal fun PackageInfo.getVersionString(): String {
     @Suppress("DEPRECATION")
     return versionCode.toString()
 }
+
+/**
+ * Resolves the result of a storeExternalId operation and sends it back to the Flutter side.
+ * If the [ExternalIdResult] is [ExternalIdResult.Success], it sends the result using success.
+ * If the [ExternalIdResult] is [ExternalIdResult.Error], it sends the result using error.
+ *
+ * @param result The [MethodChannel.Result] handler to send the result/error to.
+ */
+internal fun ExternalIdResult.resolve(result: MethodChannel.Result) {
+    when (this) {
+        is ExternalIdResult.Success -> result.success(null)
+        is ExternalIdResult.Error -> result.error("external-id-failure", this.errorMsg, null)
+    }
+}

android/src/main/kotlin/com/aheaditec/freerasp/handlers/MethodCallHandler.kt

@@ -10,6 +10,7 @@ import androidx.lifecycle.LifecycleEventObserver
 import androidx.lifecycle.LifecycleOwner
 import com.aheaditec.freerasp.Utils
 import com.aheaditec.freerasp.generated.TalsecPigeonApi
+import com.aheaditec.freerasp.resolve
 import com.aheaditec.freerasp.runResultCatching
 import com.aheaditec.freerasp.toPigeon
 import com.aheaditec.talsec_security.security.api.SuspiciousAppInfo
@@ -216,8 +217,7 @@ internal class MethodCallHandler : MethodCallHandler, LifecycleEventObserver {
         runResultCatching(result) {
             context?.let {
                 val data = call.argument<String>("data") ?: throw NullPointerException("External ID data cannot be null.")
-                Talsec.storeExternalId(it, data)
-                result.success(null)
+                Talsec.storeExternalId(it, data).resolve(result)
                 return@runResultCatching
             }
             throw IllegalStateException("Unable to store external ID - context is null")