Use embedded version of Element Call (#4470)

* Use embedded version of Element Call: for in-app room calls, the app will use an embedded version of Element Call shipped with the app instead of using an external service.

* Remove `ElementCallBaseUrlProvider` so we don't use the Element well known file to get the base URL anymore

* Remove `ElementCallConfig.DEFAULT_BASE_URL` since it's not used anymore

* Restore the usage of the custom EC base URL in developer settings as the actual base URL, it present

* Add a way to customise the embedded EC analytic credentials

* Update CI to use the EC analytic credentials as secrets

* Improve the custom URL placeholder to include the `/room` suffix

features/call/impl/src/main/kotlin/io/element/android/features/call/impl/utils/DefaultCallAnalyticCredentialsProvider.kt

@@ -0,0 +1,23 @@
+/*
+ * Copyright 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.features.call.impl.utils
+
+import com.squareup.anvil.annotations.ContributesBinding
+import io.element.android.features.call.impl.BuildConfig
+import io.element.android.libraries.di.AppScope
+import io.element.android.libraries.matrix.api.widget.CallAnalyticCredentialsProvider
+import javax.inject.Inject
+
+@ContributesBinding(AppScope::class)
+class DefaultCallAnalyticCredentialsProvider @Inject constructor() : CallAnalyticCredentialsProvider {
+    override val posthogUserId: String? = BuildConfig.POSTHOG_USER_ID.takeIf { it.isNotBlank() }
+    override val posthogApiHost: String? = BuildConfig.POSTHOG_API_HOST.takeIf { it.isNotBlank() }
+    override val posthogApiKey: String? = BuildConfig.POSTHOG_API_KEY.takeIf { it.isNotBlank() }
+    override val rageshakeSubmitUrl: String? = BuildConfig.RAGESHAKE_URL.takeIf { it.isNotBlank() }
+    override val sentryDsn: String? = BuildConfig.SENTRY_DSN.takeIf { it.isNotBlank() }
+}

features/call/impl/src/main/kotlin/io/element/android/features/call/impl/utils/DefaultCallWidgetProvider.kt

@@ -8,10 +8,8 @@
 package io.element.android.features.call.impl.utils
 
 import com.squareup.anvil.annotations.ContributesBinding
-import io.element.android.appconfig.ElementCallConfig
 import io.element.android.libraries.di.AppScope
 import io.element.android.libraries.matrix.api.MatrixClientProvider
-import io.element.android.libraries.matrix.api.call.ElementCallBaseUrlProvider
 import io.element.android.libraries.matrix.api.core.RoomId
 import io.element.android.libraries.matrix.api.core.SessionId
 import io.element.android.libraries.matrix.api.widget.CallWidgetSettingsProvider
@@ -19,12 +17,13 @@ import io.element.android.libraries.preferences.api.store.AppPreferencesStore
 import kotlinx.coroutines.flow.firstOrNull
 import javax.inject.Inject
 
+private const val EMBEDDED_CALL_WIDGET_BASE_URL = "https://appassets.androidplatform.net/element-call/index.html"
+
 @ContributesBinding(AppScope::class)
 class DefaultCallWidgetProvider @Inject constructor(
     private val matrixClientsProvider: MatrixClientProvider,
     private val appPreferencesStore: AppPreferencesStore,
     private val callWidgetSettingsProvider: CallWidgetSettingsProvider,
-    private val elementCallBaseUrlProvider: ElementCallBaseUrlProvider,
 ) : CallWidgetProvider {
     override suspend fun getWidget(
         sessionId: SessionId,
@@ -35,9 +34,10 @@ class DefaultCallWidgetProvider @Inject constructor(
     ): Result<CallWidgetProvider.GetWidgetResult> = runCatching {
         val matrixClient = matrixClientsProvider.getOrRestore(sessionId).getOrThrow()
         val room = matrixClient.getRoom(roomId) ?: error("Room not found")
-        val baseUrl = appPreferencesStore.getCustomElementCallBaseUrlFlow().firstOrNull()
-            ?: elementCallBaseUrlProvider.provides(matrixClient)
-            ?: ElementCallConfig.DEFAULT_BASE_URL
+
+        val customBaseUrl = appPreferencesStore.getCustomElementCallBaseUrlFlow().firstOrNull()
+        val baseUrl = customBaseUrl ?: EMBEDDED_CALL_WIDGET_BASE_URL
+
         val isEncrypted = room.info().isEncrypted ?: room.getUpdatedIsEncrypted().getOrThrow()
         val widgetSettings = callWidgetSettingsProvider.provide(baseUrl, encrypted = isEncrypted)
         val callUrl = room.generateWidgetWebViewUrl(
@@ -46,9 +46,10 @@ class DefaultCallWidgetProvider @Inject constructor(
             languageTag = languageTag,
             theme = theme,
         ).getOrThrow()
+
         CallWidgetProvider.GetWidgetResult(
             driver = room.getWidgetDriver(widgetSettings).getOrThrow(),
-            url = callUrl
+            url = callUrl,
         )
     }
 }

features/call/impl/src/main/kotlin/io/element/android/features/call/impl/utils/WebViewWidgetMessageInterceptor.kt

@@ -16,6 +16,8 @@ import android.webkit.WebResourceRequest
 import android.webkit.WebResourceResponse
 import android.webkit.WebView
 import android.webkit.WebViewClient
+import androidx.core.net.toUri
+import androidx.webkit.WebViewAssetLoader
 import androidx.webkit.WebViewCompat
 import androidx.webkit.WebViewFeature
 import io.element.android.features.call.impl.BuildConfig
@@ -37,6 +39,10 @@ class WebViewWidgetMessageInterceptor(
     override val interceptedMessages = MutableSharedFlow<String>(extraBufferCapacity = 10)
 
     init {
+        val assetLoader = WebViewAssetLoader.Builder()
+            .addPathHandler("/", WebViewAssetLoader.AssetsPathHandler(webView.context))
+            .build()
+
         webView.webViewClient = object : WebViewClient() {
             override fun onPageStarted(view: WebView?, url: String?, favicon: Bitmap?) {
                 super.onPageStarted(view, url, favicon)
@@ -117,6 +123,14 @@ class WebViewWidgetMessageInterceptor(
 
                 super.onReceivedSslError(view, handler, error)
             }
+
+            override fun shouldInterceptRequest(view: WebView?, request: WebResourceRequest): WebResourceResponse? {
+                return assetLoader.shouldInterceptRequest(request.url)
+            }
+
+            override fun shouldInterceptRequest(view: WebView?, url: String): WebResourceResponse? {
+                return assetLoader.shouldInterceptRequest(url.toUri())
+            }
         }
 
         // Create a WebMessageListener, which will receive messages from the WebView and reply to them

features/call/impl/src/test/kotlin/io/element/android/features/call/utils/DefaultCallWidgetProviderTest.kt

@@ -9,9 +9,7 @@ package io.element.android.features.call.utils
 
 import com.google.common.truth.Truth.assertThat
 import io.element.android.features.call.impl.utils.DefaultCallWidgetProvider
-import io.element.android.libraries.matrix.api.MatrixClient
 import io.element.android.libraries.matrix.api.MatrixClientProvider
-import io.element.android.libraries.matrix.api.call.ElementCallBaseUrlProvider
 import io.element.android.libraries.matrix.api.widget.CallWidgetSettingsProvider
 import io.element.android.libraries.matrix.test.A_ROOM_ID
 import io.element.android.libraries.matrix.test.A_SESSION_ID
@@ -22,8 +20,6 @@ import io.element.android.libraries.matrix.test.widget.FakeCallWidgetSettingsPro
 import io.element.android.libraries.matrix.test.widget.FakeMatrixWidgetDriver
 import io.element.android.libraries.preferences.api.store.AppPreferencesStore
 import io.element.android.libraries.preferences.test.InMemoryAppPreferencesStore
-import io.element.android.tests.testutils.lambda.lambdaRecorder
-import io.element.android.tests.testutils.lambda.value
 import kotlinx.coroutines.test.runTest
 import org.junit.Test
 
@@ -104,42 +100,13 @@ class DefaultCallWidgetProviderTest {
         assertThat(settingsProvider.providedBaseUrls).containsExactly("https://custom.element.io")
     }
 
-    @Test
-    fun `getWidget - will use a wellknown base url if it exists`() = runTest {
-        val aCustomUrl = "https://custom.element.io"
-        val providesLambda = lambdaRecorder<MatrixClient, String?> { _ -> aCustomUrl }
-        val elementCallBaseUrlProvider = FakeElementCallBaseUrlProvider { matrixClient ->
-            providesLambda(matrixClient)
-        }
-        val room = FakeMatrixRoom(
-            generateWidgetWebViewUrlResult = { _, _, _, _ -> Result.success("url") },
-            getWidgetDriverResult = { Result.success(FakeMatrixWidgetDriver()) },
-        )
-        val client = FakeMatrixClient().apply {
-            givenGetRoomResult(A_ROOM_ID, room)
-        }
-        val settingsProvider = FakeCallWidgetSettingsProvider()
-        val provider = createProvider(
-            matrixClientProvider = FakeMatrixClientProvider { Result.success(client) },
-            callWidgetSettingsProvider = settingsProvider,
-            elementCallBaseUrlProvider = elementCallBaseUrlProvider,
-        )
-        provider.getWidget(A_SESSION_ID, A_ROOM_ID, "clientId", "languageTag", "theme")
-        assertThat(settingsProvider.providedBaseUrls).containsExactly(aCustomUrl)
-        providesLambda.assertions()
-            .isCalledOnce()
-            .with(value(client))
-    }
-
     private fun createProvider(
         matrixClientProvider: MatrixClientProvider = FakeMatrixClientProvider(),
         appPreferencesStore: AppPreferencesStore = InMemoryAppPreferencesStore(),
         callWidgetSettingsProvider: CallWidgetSettingsProvider = FakeCallWidgetSettingsProvider(),
-        elementCallBaseUrlProvider: ElementCallBaseUrlProvider = FakeElementCallBaseUrlProvider { _ -> null },
     ) = DefaultCallWidgetProvider(
         matrixClientsProvider = matrixClientProvider,
         appPreferencesStore = appPreferencesStore,
         callWidgetSettingsProvider = callWidgetSettingsProvider,
-        elementCallBaseUrlProvider = elementCallBaseUrlProvider,
     )
 }

features/call/impl/src/test/kotlin/io/element/android/features/call/utils/FakeElementCallBaseUrlProvider.kt

@@ -1,20 +0,0 @@
-/*
- * Copyright 2024 New Vector Ltd.
- *
- * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
- * Please see LICENSE files in the repository root for full details.
- */
-
-package io.element.android.features.call.utils
-
-import io.element.android.libraries.matrix.api.MatrixClient
-import io.element.android.libraries.matrix.api.call.ElementCallBaseUrlProvider
-import io.element.android.tests.testutils.lambda.lambdaError
-
-class FakeElementCallBaseUrlProvider(
-    private val providesLambda: (MatrixClient) -> String? = { lambdaError() }
-) : ElementCallBaseUrlProvider {
-    override suspend fun provides(matrixClient: MatrixClient): String? {
-        return providesLambda(matrixClient)
-    }
-}