Display a banner instead of the composer when user cannot post message to a room (#602)

features/messages/impl/src/main/kotlin/io/element/android/features/messages/impl/MessagesPresenter.kt

@@ -19,6 +19,7 @@ package io.element.android.features.messages.impl
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.MutableState
+import androidx.compose.runtime.State
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
@@ -55,6 +56,7 @@ import io.element.android.libraries.designsystem.utils.SnackbarDispatcher
 import io.element.android.libraries.designsystem.utils.handleSnackbarMessage
 import io.element.android.libraries.matrix.api.core.EventId
 import io.element.android.libraries.matrix.api.room.MatrixRoom
+import io.element.android.libraries.matrix.api.room.MessageEventType
 import io.element.android.libraries.matrix.ui.components.AttachmentThumbnailInfo
 import io.element.android.libraries.matrix.ui.components.AttachmentThumbnailType
 import io.element.android.libraries.textcomposer.MessageComposerMode
@@ -86,6 +88,7 @@ class MessagesPresenter @Inject constructor(
         val retryState = retrySendMenuPresenter.present()
 
         val syncUpdateFlow = room.syncUpdateFlow().collectAsState(0L)
+        val userHasPermissionToSendMessage by getCanSendEvent(MessageEventType.ROOM_MESSAGE)
         val roomName: MutableState<String?> = rememberSaveable {
             mutableStateOf(null)
         }
@@ -125,6 +128,7 @@ class MessagesPresenter @Inject constructor(
             roomId = room.roomId,
             roomName = roomName.value,
             roomAvatar = roomAvatar.value,
+            userHasPermissionToSendMessage = userHasPermissionToSendMessage,
             composerState = composerState,
             timelineState = timelineState,
             actionListState = actionListState,
@@ -218,4 +222,13 @@ class MessagesPresenter @Inject constructor(
             MessageComposerEvents.SetMode(composerMode)
         )
     }
+
+    @Composable
+    private fun getCanSendEvent(type: MessageEventType): State<Boolean> {
+        val canSendEvent = remember(type) { mutableStateOf(false) }
+        LaunchedEffect(type) {
+            canSendEvent.value = room.canSendEvent(type).getOrElse { false }
+        }
+        return canSendEvent
+    }
 }

features/messages/impl/src/main/kotlin/io/element/android/features/messages/impl/MessagesState.kt

@@ -31,6 +31,7 @@ data class MessagesState(
     val roomId: RoomId,
     val roomName: String?,
     val roomAvatar: AvatarData?,
+    val userHasPermissionToSendMessage: Boolean,
     val composerState: MessageComposerState,
     val timelineState: TimelineState,
     val actionListState: ActionListState,

features/messages/impl/src/main/kotlin/io/element/android/features/messages/impl/MessagesStateProvider.kt

@@ -35,6 +35,7 @@ open class MessagesStateProvider : PreviewParameterProvider<MessagesState> {
             aMessagesState(),
             aMessagesState().copy(hasNetworkConnection = false),
             aMessagesState().copy(composerState = aMessageComposerState().copy(showAttachmentSourcePicker = true)),
+            aMessagesState().copy(userHasPermissionToSendMessage = false),
         )
 }
 
@@ -42,6 +43,7 @@ fun aMessagesState() = MessagesState(
     roomId = RoomId("!id:domain"),
     roomName = "Room name",
     roomAvatar = AvatarData("!id:domain", "Room name"),
+    userHasPermissionToSendMessage = true,
     composerState = aMessageComposerState().copy(
         text = StableCharSequence("Hello"),
         isFullScreen = false,

features/messages/impl/src/main/kotlin/io/element/android/features/messages/impl/MessagesView.kt

@@ -16,7 +16,9 @@
 
 package io.element.android.features.messages.impl
 
+import androidx.compose.foundation.background
 import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.ExperimentalLayoutApi
 import androidx.compose.foundation.layout.Row
@@ -34,6 +36,7 @@ import androidx.compose.foundation.layout.wrapContentHeight
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.ArrowBack
 import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.SnackbarHost
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
@@ -41,7 +44,9 @@ import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.platform.LocalView
 import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.font.FontStyle
 import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.tooling.preview.PreviewParameter
@@ -231,12 +236,16 @@ fun MessagesViewContent(
                 onTimestampClicked = onTimestampClicked,
             )
         }
-        MessageComposerView(
+        if (state.userHasPermissionToSendMessage) {
-            state = state.composerState,
+            MessageComposerView(
-            modifier = Modifier
+                state = state.composerState,
-                .fillMaxWidth()
+                modifier = Modifier
-                .wrapContentHeight(Alignment.Bottom)
+                    .fillMaxWidth()
-        )
+                    .wrapContentHeight(Alignment.Bottom)
+            )
+        } else {
+            CantSendMessageBanner()
+        }
     }
 }
 
@@ -281,6 +290,28 @@ fun MessagesViewTopBar(
     )
 }
 
+@Composable
+fun CantSendMessageBanner(
+    modifier: Modifier = Modifier,
+) {
+    Row(
+        modifier = modifier
+            .fillMaxWidth()
+            .background(MaterialTheme.colorScheme.secondary)
+            .padding(16.dp),
+        verticalAlignment = Alignment.CenterVertically,
+        horizontalArrangement = Arrangement.Center
+    ) {
+        Text(
+            text = stringResource(id = R.string.screen_room_no_permission_to_post),
+            color = MaterialTheme.colorScheme.onSecondary,
+            style = MaterialTheme.typography.bodyMedium,
+            textAlign = TextAlign.Center,
+            fontStyle = FontStyle.Italic,
+        )
+    }
+}
+
 @Preview
 @Composable
 internal fun MessagesViewLightPreview(@PreviewParameter(MessagesStateProvider::class) state: MessagesState) =

features/messages/impl/src/main/res/values/localazy.xml

@@ -10,6 +10,9 @@
   <string name="screen_room_attachment_source_files">"Attachment"</string>
   <string name="screen_room_attachment_source_gallery">"Photo &amp; Video Library"</string>
   <string name="screen_room_error_failed_retrieving_user_details">"Could not retrieve user details"</string>
+  <string name="screen_room_invite_again_alert_message">"Would you like to invite them back?"</string>
+  <string name="screen_room_invite_again_alert_title">"You are alone in this chat"</string>
+  <string name="screen_room_no_permission_to_post">"You do not have permission to post to this room"</string>
   <string name="screen_room_retry_send_menu_send_again_action">"Send again"</string>
   <string name="screen_room_retry_send_menu_title">"Your message failed to send"</string>
   <string name="screen_room_error_failed_processing_media">"Failed processing media to upload, please try again."</string>

features/messages/impl/src/test/kotlin/io/element/android/features/messages/MessagesPresenterTest.kt

@@ -46,6 +46,7 @@ import io.element.android.libraries.designsystem.utils.SnackbarDispatcher
 import io.element.android.libraries.featureflag.test.FakeFeatureFlagService
 import io.element.android.libraries.matrix.api.media.MediaSource
 import io.element.android.libraries.matrix.api.room.MatrixRoom
+import io.element.android.libraries.matrix.api.room.MessageEventType
 import io.element.android.libraries.matrix.test.AN_AVATAR_URL
 import io.element.android.libraries.matrix.test.AN_EVENT_ID
 import io.element.android.libraries.matrix.test.A_ROOM_ID
@@ -166,7 +167,7 @@ class MessagesPresenterTest {
                 content = TimelineItemImageContent(
                     body = "image.jpg",
                     mediaSource = MediaSource(AN_AVATAR_URL),
-                    thumbnailSource  = null,
+                    thumbnailSource = null,
                     mimeType = MimeTypes.Jpeg,
                     blurhash = null,
                     width = 20,
@@ -318,6 +319,32 @@ class MessagesPresenterTest {
         }
     }
 
+    @Test
+    fun `present - permission to post`() = runTest {
+        val matrixRoom = FakeMatrixRoom()
+        matrixRoom.givenCanSendEventResult(MessageEventType.ROOM_MESSAGE, Result.success(true))
+        val presenter = createMessagePresenter(matrixRoom = matrixRoom)
+        moleculeFlow(RecompositionClock.Immediate) {
+            presenter.present()
+        }.test {
+            skipItems(1)
+            assertThat(awaitItem().userHasPermissionToSendMessage).isTrue()
+        }
+    }
+
+    @Test
+    fun `present - no permission to post`() = runTest {
+        val matrixRoom = FakeMatrixRoom()
+        matrixRoom.givenCanSendEventResult(MessageEventType.ROOM_MESSAGE, Result.success(false))
+        val presenter = createMessagePresenter(matrixRoom = matrixRoom)
+        moleculeFlow(RecompositionClock.Immediate) {
+            presenter.present()
+        }.test {
+            skipItems(1)
+            assertThat(awaitItem().userHasPermissionToSendMessage).isFalse()
+        }
+    }
+
     private fun TestScope.createMessagePresenter(
         coroutineDispatchers: CoroutineDispatchers = testCoroutineDispatchers(),
         matrixRoom: MatrixRoom = FakeMatrixRoom()

libraries/matrix/api/src/main/kotlin/io/element/android/libraries/matrix/api/room/MatrixRoom.kt

@@ -99,6 +99,8 @@ interface MatrixRoom : Closeable {
 
     suspend fun canSendStateEvent(type: StateEventType): Result<Boolean>
 
+    suspend fun canSendEvent(type: MessageEventType): Result<Boolean>
+
     suspend fun updateAvatar(mimeType: String, data: ByteArray): Result<Unit>
 
     suspend fun removeAvatar(): Result<Unit>

libraries/matrix/api/src/main/kotlin/io/element/android/libraries/matrix/api/room/MessageEventType.kt

@@ -0,0 +1,36 @@
+/*
+ * 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 io.element.android.libraries.matrix.api.room
+
+enum class MessageEventType {
+    CALL_ANSWER,
+    CALL_INVITE,
+    CALL_HANGUP,
+    CALL_CANDIDATES,
+    KEY_VERIFICATION_READY,
+    KEY_VERIFICATION_START,
+    KEY_VERIFICATION_CANCEL,
+    KEY_VERIFICATION_ACCEPT,
+    KEY_VERIFICATION_KEY,
+    KEY_VERIFICATION_MAC,
+    KEY_VERIFICATION_DONE,
+    REACTION_SENT,
+    ROOM_ENCRYPTED,
+    ROOM_MESSAGE,
+    ROOM_REDACTION,
+    STICKER
+}

libraries/matrix/impl/src/main/kotlin/io/element/android/libraries/matrix/impl/room/MessageEventType.kt

@@ -0,0 +1,58 @@
+/*
+ * 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 io.element.android.libraries.matrix.impl.room
+
+import io.element.android.libraries.matrix.api.room.MessageEventType
+import org.matrix.rustcomponents.sdk.MessageLikeEventType
+
+fun MessageEventType.map(): MessageLikeEventType = when (this) {
+    MessageEventType.CALL_ANSWER -> MessageLikeEventType.CALL_ANSWER
+    MessageEventType.CALL_INVITE -> MessageLikeEventType.CALL_INVITE
+    MessageEventType.CALL_HANGUP -> MessageLikeEventType.CALL_HANGUP
+    MessageEventType.CALL_CANDIDATES -> MessageLikeEventType.CALL_CANDIDATES
+    MessageEventType.KEY_VERIFICATION_READY -> MessageLikeEventType.KEY_VERIFICATION_READY
+    MessageEventType.KEY_VERIFICATION_START -> MessageLikeEventType.KEY_VERIFICATION_START
+    MessageEventType.KEY_VERIFICATION_CANCEL -> MessageLikeEventType.KEY_VERIFICATION_CANCEL
+    MessageEventType.KEY_VERIFICATION_ACCEPT -> MessageLikeEventType.KEY_VERIFICATION_ACCEPT
+    MessageEventType.KEY_VERIFICATION_KEY -> MessageLikeEventType.KEY_VERIFICATION_KEY
+    MessageEventType.KEY_VERIFICATION_MAC -> MessageLikeEventType.KEY_VERIFICATION_MAC
+    MessageEventType.KEY_VERIFICATION_DONE -> MessageLikeEventType.KEY_VERIFICATION_DONE
+    MessageEventType.REACTION_SENT -> MessageLikeEventType.REACTION_SENT
+    MessageEventType.ROOM_ENCRYPTED -> MessageLikeEventType.ROOM_ENCRYPTED
+    MessageEventType.ROOM_MESSAGE -> MessageLikeEventType.ROOM_MESSAGE
+    MessageEventType.ROOM_REDACTION -> MessageLikeEventType.ROOM_REDACTION
+    MessageEventType.STICKER -> MessageLikeEventType.STICKER
+}
+
+fun MessageLikeEventType.map(): MessageEventType = when (this) {
+    MessageLikeEventType.CALL_ANSWER -> MessageEventType.CALL_ANSWER
+    MessageLikeEventType.CALL_INVITE -> MessageEventType.CALL_INVITE
+    MessageLikeEventType.CALL_HANGUP -> MessageEventType.CALL_HANGUP
+    MessageLikeEventType.CALL_CANDIDATES -> MessageEventType.CALL_CANDIDATES
+    MessageLikeEventType.KEY_VERIFICATION_READY -> MessageEventType.KEY_VERIFICATION_READY
+    MessageLikeEventType.KEY_VERIFICATION_START -> MessageEventType.KEY_VERIFICATION_START
+    MessageLikeEventType.KEY_VERIFICATION_CANCEL -> MessageEventType.KEY_VERIFICATION_CANCEL
+    MessageLikeEventType.KEY_VERIFICATION_ACCEPT -> MessageEventType.KEY_VERIFICATION_ACCEPT
+    MessageLikeEventType.KEY_VERIFICATION_KEY -> MessageEventType.KEY_VERIFICATION_KEY
+    MessageLikeEventType.KEY_VERIFICATION_MAC -> MessageEventType.KEY_VERIFICATION_MAC
+    MessageLikeEventType.KEY_VERIFICATION_DONE -> MessageEventType.KEY_VERIFICATION_DONE
+    MessageLikeEventType.REACTION_SENT -> MessageEventType.REACTION_SENT
+    MessageLikeEventType.ROOM_ENCRYPTED -> MessageEventType.ROOM_ENCRYPTED
+    MessageLikeEventType.ROOM_MESSAGE -> MessageEventType.ROOM_MESSAGE
+    MessageLikeEventType.ROOM_REDACTION -> MessageEventType.ROOM_REDACTION
+    MessageLikeEventType.STICKER -> MessageEventType.STICKER
+}

libraries/matrix/impl/src/main/kotlin/io/element/android/libraries/matrix/impl/room/RustMatrixRoom.kt

@@ -27,6 +27,7 @@ import io.element.android.libraries.matrix.api.media.ImageInfo
 import io.element.android.libraries.matrix.api.media.VideoInfo
 import io.element.android.libraries.matrix.api.room.MatrixRoom
 import io.element.android.libraries.matrix.api.room.MatrixRoomMembersState
+import io.element.android.libraries.matrix.api.room.MessageEventType
 import io.element.android.libraries.matrix.api.room.StateEventType
 import io.element.android.libraries.matrix.api.room.roomMembers
 import io.element.android.libraries.matrix.api.timeline.MatrixTimeline
@@ -34,7 +35,6 @@ import io.element.android.libraries.matrix.impl.media.map
 import io.element.android.libraries.matrix.impl.timeline.RustMatrixTimeline
 import io.element.android.services.toolbox.api.systemclock.SystemClock
 import kotlinx.coroutines.CoroutineScope
-import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
@@ -235,6 +235,12 @@ class RustMatrixRoom(
         }
     }
 
+    override suspend fun canSendEvent(type: MessageEventType): Result<Boolean> = withContext(coroutineDispatchers.io) {
+        runCatching {
+            innerRoom.member(sessionId.value).use { it.canSendMessage(type.map()) }
+        }
+    }
+
     override suspend fun sendImage(file: File, thumbnailFile: File, imageInfo: ImageInfo): Result<Unit> = withContext(coroutineDispatchers.io) {
         runCatching {
             innerRoom.sendImage(file.path, thumbnailFile.path, imageInfo.map())
@@ -272,7 +278,7 @@ class RustMatrixRoom(
             }
         }
 
-    override suspend fun cancelSend(transactionId: String): Result<Unit>  =
+    override suspend fun cancelSend(transactionId: String): Result<Unit> =
         withContext(coroutineDispatchers.io) {
             runCatching {
                 innerRoom.cancelSend(transactionId)

libraries/matrix/test/src/main/kotlin/io/element/android/libraries/matrix/test/room/FakeMatrixRoom.kt

@@ -26,6 +26,7 @@ import io.element.android.libraries.matrix.api.media.ImageInfo
 import io.element.android.libraries.matrix.api.media.VideoInfo
 import io.element.android.libraries.matrix.api.room.MatrixRoom
 import io.element.android.libraries.matrix.api.room.MatrixRoomMembersState
+import io.element.android.libraries.matrix.api.room.MessageEventType
 import io.element.android.libraries.matrix.api.room.StateEventType
 import io.element.android.libraries.matrix.api.timeline.MatrixTimeline
 import io.element.android.libraries.matrix.test.A_ROOM_ID
@@ -64,6 +65,7 @@ class FakeMatrixRoom(
     private var inviteUserResult = Result.success(Unit)
     private var canInviteResult = Result.success(true)
     private val canSendStateResults = mutableMapOf<StateEventType, Result<Boolean>>()
+    private val canSendEventResults = mutableMapOf<MessageEventType, Result<Boolean>>()
     private var sendMediaResult = Result.success(Unit)
     private var setNameResult = Result.success(Unit)
     private var setTopicResult = Result.success(Unit)
@@ -198,6 +200,10 @@ class FakeMatrixRoom(
         return canSendStateResults[type] ?: Result.failure(IllegalStateException("No fake answer"))
     }
 
+    override suspend fun canSendEvent(type: MessageEventType): Result<Boolean> {
+        return canSendEventResults[type] ?: Result.failure(IllegalStateException("No fake answer"))
+    }
+
     override suspend fun sendImage(file: File, thumbnailFile: File, imageInfo: ImageInfo): Result<Unit> = fakeSendMedia()
 
     override suspend fun sendVideo(file: File, thumbnailFile: File, videoInfo: VideoInfo): Result<Unit> = fakeSendMedia()
@@ -274,6 +280,10 @@ class FakeMatrixRoom(
         canSendStateResults[type] = result
     }
 
+    fun givenCanSendEventResult(type: MessageEventType, result: Result<Boolean>) {
+        canSendEventResults[type] = result
+    }
+
     fun givenIgnoreResult(result: Result<Unit>) {
         ignoreResult = result
     }