feat: support Proteus federation if MLS not supported by backend (WPB-14456) 🍒

logic/src/commonMain/kotlin/com/wire/kalium/logic/feature/UserSessionScope.kt

@@ -1911,6 +1911,9 @@ class UserSessionScope internal constructor(
 
     val search: SearchScope by lazy {
         SearchScope(
+            mlsPublicKeysRepository = mlsPublicKeysRepository,
+            getDefaultProtocol = getDefaultProtocol,
+            getConversationProtocolInfo = conversations.getConversationProtocolInfo,
             searchUserRepository = searchUserRepository,
             selfUserId = userId,
             sessionRepository = globalScope.sessionRepository,

logic/src/commonMain/kotlin/com/wire/kalium/logic/feature/search/IsFederationSearchAllowedUseCase.kt

@@ -0,0 +1,82 @@
+/*
+ * Wire
+ * Copyright (C) 2024 Wire Swiss GmbH
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see http://www.gnu.org/licenses/.
+ */
+package com.wire.kalium.logic.feature.search
+
+import com.wire.kalium.logic.data.conversation.Conversation
+import com.wire.kalium.logic.data.id.ConversationId
+import com.wire.kalium.logic.data.mls.MLSPublicKeys
+import com.wire.kalium.logic.data.mlspublickeys.MLSPublicKeysRepository
+import com.wire.kalium.logic.data.user.SupportedProtocol
+import com.wire.kalium.logic.feature.conversation.GetConversationProtocolInfoUseCase
+import com.wire.kalium.logic.feature.user.GetDefaultProtocolUseCase
+import com.wire.kalium.logic.functional.Either
+import com.wire.kalium.util.KaliumDispatcher
+import com.wire.kalium.util.KaliumDispatcherImpl
+import kotlinx.coroutines.withContext
+
+/**
+ * Check if FederatedSearchIsAllowed according to MLS configuration of the backend
+ * and the conversation  protocol if a [ConversationId] is provided.
+ */
+interface IsFederationSearchAllowedUseCase {
+    suspend operator fun invoke(conversationId: ConversationId?): Boolean
+}
+
+@Suppress("FunctionNaming")
+internal fun IsFederationSearchAllowedUseCase(
+    mlsPublicKeysRepository: MLSPublicKeysRepository,
+    getDefaultProtocol: GetDefaultProtocolUseCase,
+    getConversationProtocolInfo: GetConversationProtocolInfoUseCase,
+    dispatcher: KaliumDispatcher = KaliumDispatcherImpl
+) = object : IsFederationSearchAllowedUseCase {
+
+    override suspend operator fun invoke(conversationId: ConversationId?): Boolean = withContext(dispatcher.io) {
+        val isMlsConfiguredForBackend = hasMLSKeysConfiguredForBackend()
+        when (isMlsConfiguredForBackend) {
+            true -> isConversationProtocolAbleToFederate(conversationId)
+            false -> true
+        }
+    }
+
+    private suspend fun hasMLSKeysConfiguredForBackend(): Boolean {
+        return when (val mlsKeysResult = mlsPublicKeysRepository.getKeys()) {
+            is Either.Left -> false
+            is Either.Right -> {
+                val mlsKeys: MLSPublicKeys = mlsKeysResult.value
+                mlsKeys.removal != null && mlsKeys.removal?.isNotEmpty() == true
+            }
+        }
+    }
+
+    /**
+     * MLS is enabled, then we need to check if the protocol for the conversation is able to federate.
+     */
+    private suspend fun isConversationProtocolAbleToFederate(conversationId: ConversationId?): Boolean {
+        val isProteusTeam = getDefaultProtocol() == SupportedProtocol.PROTEUS
+        val isOtherDomainAllowed: Boolean = conversationId?.let {
+            when (val result = getConversationProtocolInfo(it)) {
+                is GetConversationProtocolInfoUseCase.Result.Failure -> !isProteusTeam
+
+                is GetConversationProtocolInfoUseCase.Result.Success ->
+                    !isProteusTeam && result.protocolInfo !is Conversation.ProtocolInfo.Proteus
+            }
+        } ?: !isProteusTeam
+        return isOtherDomainAllowed
+    }
+
+}

logic/src/commonMain/kotlin/com/wire/kalium/logic/feature/search/SearchScope.kt

@@ -17,12 +17,19 @@
  */
 package com.wire.kalium.logic.feature.search
 
+import com.wire.kalium.logic.data.mlspublickeys.MLSPublicKeysRepository
 import com.wire.kalium.logic.data.publicuser.SearchUserRepository
 import com.wire.kalium.logic.data.session.SessionRepository
 import com.wire.kalium.logic.data.user.UserId
+import com.wire.kalium.logic.feature.conversation.GetConversationProtocolInfoUseCase
+import com.wire.kalium.logic.feature.user.GetDefaultProtocolUseCase
 import com.wire.kalium.logic.featureFlags.KaliumConfigs
 
+@Suppress("LongParameterList")
 class SearchScope internal constructor(
+    private val mlsPublicKeysRepository: MLSPublicKeysRepository,
+    private val getDefaultProtocol: GetDefaultProtocolUseCase,
+    private val getConversationProtocolInfo: GetConversationProtocolInfoUseCase,
     private val searchUserRepository: SearchUserRepository,
     private val sessionRepository: SessionRepository,
     private val selfUserId: UserId,
@@ -42,4 +49,7 @@ class SearchScope internal constructor(
             kaliumConfigs.maxRemoteSearchResultCount
         )
     val federatedSearchParser: FederatedSearchParser get() = FederatedSearchParser(sessionRepository, selfUserId)
+
+    val isFederationSearchAllowedUseCase: IsFederationSearchAllowedUseCase
+        get() = IsFederationSearchAllowedUseCase(mlsPublicKeysRepository, getDefaultProtocol, getConversationProtocolInfo)
 }

logic/src/commonTest/kotlin/com/wire/kalium/logic/feature/search/IsFederationSearchAllowedUseCaseTest.kt

@@ -0,0 +1,166 @@
+/*
+ * Wire
+ * Copyright (C) 2024 Wire Swiss GmbH
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see http://www.gnu.org/licenses/.
+ */
+package com.wire.kalium.logic.feature.search
+
+import com.wire.kalium.logic.CoreFailure
+import com.wire.kalium.logic.data.mls.MLSPublicKeys
+import com.wire.kalium.logic.data.mlspublickeys.MLSPublicKeysRepository
+import com.wire.kalium.logic.data.user.SupportedProtocol
+import com.wire.kalium.logic.feature.conversation.GetConversationProtocolInfoUseCase
+import com.wire.kalium.logic.feature.user.GetDefaultProtocolUseCase
+import com.wire.kalium.logic.framework.TestConversation
+import com.wire.kalium.logic.framework.TestConversation.PROTEUS_PROTOCOL_INFO
+import com.wire.kalium.logic.functional.Either
+import com.wire.kalium.util.KaliumDispatcherImpl
+import io.mockative.Mock
+import io.mockative.any
+import io.mockative.coEvery
+import io.mockative.coVerify
+import io.mockative.every
+import io.mockative.mock
+import io.mockative.once
+import kotlinx.coroutines.test.runTest
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+class IsFederationSearchAllowedUseCaseTest {
+
+    @Test
+    fun givenMLSIsNotConfigured_whenInvokingIsFederationSearchAllowed_thenReturnTrue() = runTest {
+        val (arrangement, isFederationSearchAllowedUseCase) = Arrangement()
+            .withMLSConfiguredForBackend(isConfigured = false)
+            .arrange()
+
+        val isAllowed = isFederationSearchAllowedUseCase(conversationId = null)
+
+        assertEquals(true, isAllowed)
+        coVerify { arrangement.mlsPublicKeysRepository.getKeys() }.wasInvoked(once)
+        coVerify { arrangement.getDefaultProtocol.invoke() }.wasNotInvoked()
+        coVerify { arrangement.getConversationProtocolInfo.invoke(any()) }.wasNotInvoked()
+    }
+
+    @Test
+    fun givenMLSIsConfiguredAndAMLSTeamWithEmptyKeys_whenInvokingIsFederationSearchAllowed_thenReturnTrue() = runTest {
+        val (arrangement, isFederationSearchAllowedUseCase) = Arrangement()
+            .withEmptyMlsKeys()
+            .arrange()
+
+        val isAllowed = isFederationSearchAllowedUseCase(conversationId = null)
+
+        assertEquals(true, isAllowed)
+        coVerify { arrangement.mlsPublicKeysRepository.getKeys() }.wasInvoked(once)
+        coVerify { arrangement.getDefaultProtocol.invoke() }.wasNotInvoked()
+        coVerify { arrangement.getConversationProtocolInfo.invoke(any()) }.wasNotInvoked()
+    }
+
+    @Test
+    fun givenMLSIsConfiguredAndAMLSTeam_whenInvokingIsFederationSearchAllowed_thenReturnTrue() = runTest {
+        val (arrangement, isFederationSearchAllowedUseCase) = Arrangement()
+            .withMLSConfiguredForBackend(isConfigured = true)
+            .withDefaultProtocol(SupportedProtocol.MLS)
+            .arrange()
+
+        val isAllowed = isFederationSearchAllowedUseCase(conversationId = null)
+
+        assertEquals(true, isAllowed)
+        coVerify { arrangement.mlsPublicKeysRepository.getKeys() }.wasInvoked(once)
+        coVerify { arrangement.getDefaultProtocol.invoke() }.wasInvoked(once)
+        coVerify { arrangement.getConversationProtocolInfo.invoke(any()) }.wasNotInvoked()
+    }
+
+    @Test
+    fun givenMLSIsConfiguredAndAMLSTeamAndProteusProtocol_whenInvokingIsFederationSearchAllowed_thenReturnFalse() = runTest {
+        val (arrangement, isFederationSearchAllowedUseCase) = Arrangement()
+            .withMLSConfiguredForBackend(isConfigured = true)
+            .withDefaultProtocol(SupportedProtocol.MLS)
+            .withConversationProtocolInfo(GetConversationProtocolInfoUseCase.Result.Success(PROTEUS_PROTOCOL_INFO))
+            .arrange()
+
+        val isAllowed = isFederationSearchAllowedUseCase(conversationId = TestConversation.ID)
+
+        assertEquals(false, isAllowed)
+        coVerify { arrangement.mlsPublicKeysRepository.getKeys() }.wasInvoked(once)
+        coVerify { arrangement.getDefaultProtocol.invoke() }.wasInvoked(once)
+        coVerify { arrangement.getConversationProtocolInfo.invoke(any()) }.wasInvoked(once)
+    }
+
+    @Test
+    fun givenMLSIsConfiguredAndAProteusTeamAndProteusProtocol_whenInvokingIsFederationSearchAllowed_thenReturnFalse() = runTest {
+        val (arrangement, isFederationSearchAllowedUseCase) = Arrangement()
+            .withMLSConfiguredForBackend(isConfigured = true)
+            .withDefaultProtocol(SupportedProtocol.PROTEUS)
+            .withConversationProtocolInfo(GetConversationProtocolInfoUseCase.Result.Success(PROTEUS_PROTOCOL_INFO))
+            .arrange()
+
+        val isAllowed = isFederationSearchAllowedUseCase(conversationId = TestConversation.ID)
+
+        assertEquals(false, isAllowed)
+        coVerify { arrangement.mlsPublicKeysRepository.getKeys() }.wasInvoked(once)
+        coVerify { arrangement.getDefaultProtocol.invoke() }.wasInvoked(once)
+        coVerify { arrangement.getConversationProtocolInfo.invoke(any()) }.wasInvoked(once)
+    }
+
+    private class Arrangement {
+
+        @Mock
+        val mlsPublicKeysRepository = mock(MLSPublicKeysRepository::class)
+
+        @Mock
+        val getDefaultProtocol = mock(GetDefaultProtocolUseCase::class)
+
+        @Mock
+        val getConversationProtocolInfo = mock(GetConversationProtocolInfoUseCase::class)
+
+        private val MLS_PUBLIC_KEY = MLSPublicKeys(
+            removal = mapOf(
+                "ed25519" to "gRNvFYReriXbzsGu7zXiPtS8kaTvhU1gUJEV9rdFHVw="
+            )
+        )
+
+        fun withDefaultProtocol(protocol: SupportedProtocol) = apply {
+            every { getDefaultProtocol.invoke() }.returns(protocol)
+        }
+
+        suspend fun withConversationProtocolInfo(protocolInfo: GetConversationProtocolInfoUseCase.Result) = apply {
+            coEvery { getConversationProtocolInfo(any()) }.returns(protocolInfo)
+        }
+
+        suspend fun withMLSConfiguredForBackend(isConfigured: Boolean = true) = apply {
+            coEvery { mlsPublicKeysRepository.getKeys() }.returns(
+                if (isConfigured) {
+                    Either.Right(MLS_PUBLIC_KEY)
+                } else {
+                    Either.Left(CoreFailure.Unknown(RuntimeException("MLS is not configured")))
+                }
+            )
+        }
+
+        suspend fun withEmptyMlsKeys() = apply {
+            coEvery { mlsPublicKeysRepository.getKeys() }.returns(Either.Right(MLSPublicKeys(emptyMap())))
+        }
+
+        fun arrange() = this to IsFederationSearchAllowedUseCase(
+            mlsPublicKeysRepository = mlsPublicKeysRepository,
+            getDefaultProtocol = getDefaultProtocol,
+            getConversationProtocolInfo = getConversationProtocolInfo,
+            dispatcher = KaliumDispatcherImpl
+        )
+    }
+}
+
+