Implement Mobile Device Manager feature with 3 keys.

vector-app/src/gplay/java/im/vector/app/push/fcm/VectorFirebaseMessagingService.kt

@@ -26,6 +26,8 @@ import im.vector.app.core.pushers.PushParser
 import im.vector.app.core.pushers.PushersManager
 import im.vector.app.core.pushers.UnifiedPushHelper
 import im.vector.app.core.pushers.VectorPushHandler
+import im.vector.app.features.mdm.MdmData
+import im.vector.app.features.mdm.MdmService
 import im.vector.app.features.settings.VectorPreferences
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.SupervisorJob
@@ -46,6 +48,7 @@ class VectorFirebaseMessagingService : FirebaseMessagingService() {
     @Inject lateinit var pushParser: PushParser
     @Inject lateinit var vectorPushHandler: VectorPushHandler
     @Inject lateinit var unifiedPushHelper: UnifiedPushHelper
+    @Inject lateinit var mdmService: MdmService
 
     private val scope = CoroutineScope(SupervisorJob())
 
@@ -53,6 +56,7 @@ class VectorFirebaseMessagingService : FirebaseMessagingService() {
         scope.cancel()
         super.onDestroy()
     }
+
     override fun onNewToken(token: String) {
         Timber.tag(loggerTag.value).d("New Firebase token")
         fcmHelper.storeFcmToken(token)
@@ -62,7 +66,13 @@ class VectorFirebaseMessagingService : FirebaseMessagingService() {
                 unifiedPushHelper.isEmbeddedDistributor()
         ) {
             scope.launch {
-                pushersManager.enqueueRegisterPusher(token, getString(R.string.pusher_http_url))
+                pushersManager.enqueueRegisterPusher(
+                        pushKey = token,
+                        gateway = mdmService.getData(
+                                mdmData = MdmData.DefaultPushGatewayUrl,
+                                defaultValue = getString(R.string.pusher_http_url),
+                        ),
+                )
             }
         }
     }

vector-app/src/main/AndroidManifest.xml

@@ -20,6 +20,10 @@
         tools:ignore="UnusedAttribute"
         tools:replace="android:allowBackup">
 
+        <meta-data
+            android:name="android.content.APP_RESTRICTIONS"
+            android:resource="@xml/vector_app_restrictions" />
+
         <!-- Activity alias for the launcher Activity (must be declared after the Activity it targets) -->
         <!-- exported="true" is required to launch application -->
         <activity-alias

vector-app/src/main/java/im/vector/app/core/di/SingletonModule.kt

@@ -50,6 +50,9 @@ import im.vector.app.features.analytics.metrics.VectorPlugins
 import im.vector.app.features.configuration.VectorCustomEventTypesProvider
 import im.vector.app.features.invite.AutoAcceptInvites
 import im.vector.app.features.invite.CompileTimeAutoAcceptInvites
+import im.vector.app.features.mdm.DefaultMdmService
+import im.vector.app.features.mdm.MdmData
+import im.vector.app.features.mdm.MdmService
 import im.vector.app.features.navigation.DefaultNavigator
 import im.vector.app.features.navigation.Navigator
 import im.vector.app.features.pin.PinCodeStore
@@ -145,6 +148,7 @@ import javax.inject.Singleton
             flipperProxy: FlipperProxy,
             vectorPlugins: VectorPlugins,
             vectorCustomEventTypesProvider: VectorCustomEventTypesProvider,
+            mdmService: MdmService,
     ): MatrixConfiguration {
         return MatrixConfiguration(
                 applicationFlavor = BuildConfig.FLAVOR_DESCRIPTION,
@@ -156,6 +160,7 @@ import javax.inject.Singleton
                 metricPlugins = vectorPlugins.plugins(),
                 cryptoAnalyticsPlugin = vectorPlugins.cryptoMetricPlugin,
                 customEventTypesProvider = vectorCustomEventTypesProvider,
+                clientPermalinkBaseUrl = mdmService.getData(MdmData.PermalinkBaseUrl),
                 syncConfig = SyncConfig(
                         syncFilterParams = SyncFilterParams(lazyLoadMembersForStateEvents = true, useThreadNotifications = true)
                 )
@@ -168,6 +173,11 @@ import javax.inject.Singleton
         return Matrix(context, configuration)
     }
 
+    @Provides
+    fun providesMdmService(context: Context): MdmService {
+        return DefaultMdmService(context)
+    }
+
     @Provides
     fun providesCurrentSession(activeSessionHolder: ActiveSessionHolder): Session {
         // TODO handle session injection better

vector-app/src/main/res/values/strings.xml

@@ -2,4 +2,8 @@
 <resources xmlns:tools="http://schemas.android.com/tools">
     <!-- The https://github.com/LikeTheSalad/android-stem requires a non empty strings.xml -->
     <string name="ignored_placeholder" tools:ignore="UnusedResources">ignored</string>
+
+    <string name="restriction_default_homeserver_url_title">Default homeserver URL</string>
+    <string name="restriction_default_push_gateway_title">Default Push gateway</string>
+    <string name="restriction_permalink_base_url_title">Permalink base url</string>
 </resources>

vector-app/src/main/res/xml/vector_app_restrictions.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<restrictions xmlns:android="http://schemas.android.com/apk/res/android">
+    <restriction
+        android:key="im.vector.app.serverConfigDefaultHomeserverUrlString"
+        android:restrictionType="string"
+        android:title="@string/restriction_default_homeserver_url_title" />
+
+    <restriction
+        android:key="im.vector.app.serverConfigSygnalAPIUrlString"
+        android:restrictionType="string"
+        android:title="@string/restriction_default_push_gateway_title" />
+
+    <restriction
+        android:key="im.vector.app.clientPermalinkBaseUrl"
+        android:restrictionType="string"
+        android:title="@string/restriction_permalink_base_url_title" />
+
+</restrictions>

vector/src/main/java/im/vector/app/core/platform/VectorBaseActivity.kt

@@ -76,6 +76,7 @@ import im.vector.app.features.analytics.AnalyticsTracker
 import im.vector.app.features.analytics.plan.MobileScreen
 import im.vector.app.features.configuration.VectorConfiguration
 import im.vector.app.features.consent.ConsentNotGivenHelper
+import im.vector.app.features.mdm.MdmService
 import im.vector.app.features.navigation.Navigator
 import im.vector.app.features.pin.PinLocker
 import im.vector.app.features.pin.PinMode
@@ -171,6 +172,7 @@ abstract class VectorBaseActivity<VB : ViewBinding> : AppCompatActivity(), Maver
     @Inject lateinit var activeSessionHolder: ActiveSessionHolder
     @Inject lateinit var vectorPreferences: VectorPreferences
     @Inject lateinit var errorFormatter: ErrorFormatter
+    @Inject lateinit var mdmService: MdmService
 
     // For debug only
     @Inject lateinit var debugReceiver: DebugReceiver
@@ -412,6 +414,10 @@ abstract class VectorBaseActivity<VB : ViewBinding> : AppCompatActivity(), Maver
             rageShake.start()
         }
         debugReceiver.register(this)
+        mdmService.registerListener(this) {
+            // Just log that a change occurred.
+            Timber.w("MDM data has been updated")
+        }
     }
 
     private val postResumeScheduledActions = mutableListOf<() -> Unit>()
@@ -442,6 +448,7 @@ abstract class VectorBaseActivity<VB : ViewBinding> : AppCompatActivity(), Maver
 
         rageShake.stop()
         debugReceiver.unregister(this)
+        mdmService.unregisterListener(this)
     }
 
     override fun onWindowFocusChanged(hasFocus: Boolean) {

vector/src/main/java/im/vector/app/core/pushers/PushersManager.kt

@@ -22,6 +22,8 @@ import im.vector.app.core.di.ActiveSessionHolder
 import im.vector.app.core.resources.AppNameProvider
 import im.vector.app.core.resources.LocaleProvider
 import im.vector.app.core.resources.StringProvider
+import im.vector.app.features.mdm.MdmData
+import im.vector.app.features.mdm.MdmService
 import org.matrix.android.sdk.api.session.pushers.HttpPusher
 import org.matrix.android.sdk.api.session.pushers.Pusher
 import java.util.UUID
@@ -37,6 +39,7 @@ class PushersManager @Inject constructor(
         private val stringProvider: StringProvider,
         private val appNameProvider: AppNameProvider,
         private val getDeviceInfoUseCase: GetDeviceInfoUseCase,
+        private val mdmService: MdmService,
 ) {
     suspend fun testPush() {
         val currentSession = activeSessionHolder.getActiveSession()
@@ -50,7 +53,10 @@ class PushersManager @Inject constructor(
     }
 
     suspend fun enqueueRegisterPusherWithFcmKey(pushKey: String): UUID {
-        return enqueueRegisterPusher(pushKey, stringProvider.getString(R.string.pusher_http_url))
+        return enqueueRegisterPusher(
+                pushKey = pushKey,
+                gateway = mdmService.getData(MdmData.DefaultPushGatewayUrl, stringProvider.getString(R.string.pusher_http_url))
+        )
     }
 
     suspend fun enqueueRegisterPusher(

vector/src/main/java/im/vector/app/core/pushers/UnifiedPushHelper.kt

@@ -24,6 +24,8 @@ import com.squareup.moshi.JsonClass
 import im.vector.app.R
 import im.vector.app.core.resources.StringProvider
 import im.vector.app.core.utils.getApplicationLabel
+import im.vector.app.features.mdm.MdmData
+import im.vector.app.features.mdm.MdmService
 import org.matrix.android.sdk.api.Matrix
 import org.matrix.android.sdk.api.cache.CacheStrategy
 import org.matrix.android.sdk.api.failure.Failure
@@ -40,6 +42,7 @@ class UnifiedPushHelper @Inject constructor(
         private val stringProvider: StringProvider,
         private val matrix: Matrix,
         private val fcmHelper: FcmHelper,
+        private val mdmService: MdmService,
 ) {
 
     @MainThread
@@ -99,7 +102,12 @@ class UnifiedPushHelper @Inject constructor(
         // register app_id type upfcm on sygnal
         // the pushkey if FCM key
         if (UnifiedPush.getDistributor(context) == context.packageName) {
-            unifiedPushStore.storePushGateway(stringProvider.getString(R.string.pusher_http_url))
+            unifiedPushStore.storePushGateway(
+                    gateway = mdmService.getData(
+                            mdmData = MdmData.DefaultPushGatewayUrl,
+                            defaultValue = stringProvider.getString(R.string.pusher_http_url),
+                    )
+            )
             onDoneRunnable?.run()
             return
         }
@@ -185,7 +193,13 @@ class UnifiedPushHelper @Inject constructor(
     }
 
     fun getPushGateway(): String? {
-        return if (isEmbeddedDistributor()) stringProvider.getString(R.string.pusher_http_url)
+        return if (isEmbeddedDistributor()) {
-        else unifiedPushStore.getPushGateway()
+            mdmService.getData(
+                    mdmData = MdmData.DefaultPushGatewayUrl,
+                    defaultValue = stringProvider.getString(R.string.pusher_http_url),
+            )
+        } else {
+            unifiedPushStore.getPushGateway()
+        }
     }
 }

vector/src/main/java/im/vector/app/features/homeserver/ServerUrlsRepository.kt

@@ -25,6 +25,7 @@ import javax.inject.Inject
 
 /**
  * Object to store and retrieve home and identity server urls.
+ * Note: this class is not used.
  */
 class ServerUrlsRepository @Inject constructor(
         @DefaultPreferences
@@ -89,5 +90,5 @@ class ServerUrlsRepository @Inject constructor(
     /**
      * Return default homeserver url from resources.
      */
-    fun getDefaultHomeServerUrl() = stringProvider.getString(R.string.matrix_org_server_url)
+    private fun getDefaultHomeServerUrl() = stringProvider.getString(R.string.matrix_org_server_url)
 }

vector/src/main/java/im/vector/app/features/mdm/DefaultMdmService.kt

@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2023 New Vector Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package im.vector.app.features.mdm
+
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+import android.content.IntentFilter
+import android.content.RestrictionsManager
+import androidx.core.content.getSystemService
+import dagger.hilt.android.qualifiers.ApplicationContext
+import timber.log.Timber
+import javax.inject.Inject
+
+class DefaultMdmService @Inject constructor(
+        @ApplicationContext applicationContext: Context
+) : MdmService {
+    private val restrictionsManager = applicationContext.getSystemService<RestrictionsManager>()
+    private var onChangedListener: (() -> Unit)? = null
+
+    private val restrictionsReceiver = object : BroadcastReceiver() {
+        override fun onReceive(context: Context, intent: Intent) {
+            Timber.w("Restrictions changed")
+            onChangedListener?.invoke()
+        }
+    }
+
+    override fun registerListener(context: Context, onChangedListener: () -> Unit) {
+        val restrictionsFilter = IntentFilter(Intent.ACTION_APPLICATION_RESTRICTIONS_CHANGED)
+        this.onChangedListener = onChangedListener
+        context.registerReceiver(restrictionsReceiver, restrictionsFilter)
+    }
+
+    override fun unregisterListener(context: Context) {
+        context.unregisterReceiver(restrictionsReceiver)
+        this.onChangedListener = null
+    }
+
+    override fun getData(mdmData: MdmData): String? {
+        return restrictionsManager?.applicationRestrictions?.getString(mdmData.key)
+    }
+}

vector/src/main/java/im/vector/app/features/mdm/MdmService.kt

@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2023 New Vector Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package im.vector.app.features.mdm
+
+import android.content.Context
+import timber.log.Timber
+
+enum class MdmData(val key: String) {
+    DefaultHomeserverUrl(key = "im.vector.app.serverConfigDefaultHomeserverUrlString"),
+    DefaultPushGatewayUrl(key = "im.vector.app.serverConfigSygnalAPIUrlString"),
+    PermalinkBaseUrl(key = "im.vector.app.clientPermalinkBaseUrl"),
+}
+
+interface MdmService {
+    fun registerListener(context: Context, onChangedListener: () -> Unit)
+    fun unregisterListener(context: Context)
+    fun getData(mdmData: MdmData): String?
+    fun getData(mdmData: MdmData, defaultValue: String): String {
+        return getData(mdmData)
+                ?.also {
+                    Timber.w("Using MDM data for ${mdmData.name}: $it")
+                }
+                ?: defaultValue
+    }
+}

vector/src/main/java/im/vector/app/features/onboarding/OnboardingViewModel.kt

@@ -46,6 +46,8 @@ import im.vector.app.features.login.LoginMode
 import im.vector.app.features.login.ReAuthHelper
 import im.vector.app.features.login.ServerType
 import im.vector.app.features.login.SignMode
+import im.vector.app.features.mdm.MdmData
+import im.vector.app.features.mdm.MdmService
 import im.vector.app.features.onboarding.OnboardingAction.AuthenticateAction
 import im.vector.app.features.onboarding.StartAuthenticationFlowUseCase.StartAuthenticationResult
 import kotlinx.coroutines.Job
@@ -93,6 +95,7 @@ class OnboardingViewModel @AssistedInject constructor(
         private val registrationActionHandler: RegistrationActionHandler,
         private val sdkIntProvider: BuildVersionSdkIntProvider,
         private val configureAndStartSessionUseCase: ConfigureAndStartSessionUseCase,
+        mdmService: MdmService,
 ) : VectorViewModel<OnboardingViewState, OnboardingAction, OnboardingViewEvents>(initialState) {
 
     @AssistedFactory
@@ -143,7 +146,7 @@ class OnboardingViewModel @AssistedInject constructor(
     }
 
     private val matrixOrgUrl = stringProvider.getString(R.string.matrix_org_server_url).ensureTrailingSlash()
-    private val defaultHomeserverUrl = matrixOrgUrl
+    private val defaultHomeserverUrl = mdmService.getData(MdmData.DefaultHomeserverUrl, matrixOrgUrl)
 
     private val registrationWizard: RegistrationWizard
         get() = authenticationService.getRegistrationWizard()