From da110bd2c4e9e843d7467993646248a6144d3aa4 Mon Sep 17 00:00:00 2001
From: Benoit Marty <benoit@matrix.org>
Date: Wed, 21 Jun 2023 10:50:49 +0200
Subject: [PATCH] Extract `getCanSendEvent` to the `matrixui` module, rename to
 `canSendEventAsState` and use produceState.

---
 .../messages/impl/MessagesPresenter.kt        | 13 ++------
 .../matrix/ui/room/MatrixRoomState.kt         | 31 +++++++++++++++++++
 2 files changed, 33 insertions(+), 11 deletions(-)
 create mode 100644 libraries/matrixui/src/main/kotlin/io/element/android/libraries/matrix/ui/room/MatrixRoomState.kt

diff --git a/features/messages/impl/src/main/kotlin/io/element/android/features/messages/impl/MessagesPresenter.kt b/features/messages/impl/src/main/kotlin/io/element/android/features/messages/impl/MessagesPresenter.kt
index d78025dea0..50a66f3a8e 100644
--- a/features/messages/impl/src/main/kotlin/io/element/android/features/messages/impl/MessagesPresenter.kt
+++ b/features/messages/impl/src/main/kotlin/io/element/android/features/messages/impl/MessagesPresenter.kt
@@ -19,7 +19,6 @@ 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
@@ -59,6 +58,7 @@ 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.matrix.ui.room.canSendEventAsState
 import io.element.android.libraries.textcomposer.MessageComposerMode
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.launch
@@ -88,7 +88,7 @@ class MessagesPresenter @Inject constructor(
         val retryState = retrySendMenuPresenter.present()
 
         val syncUpdateFlow = room.syncUpdateFlow().collectAsState(0L)
-        val userHasPermissionToSendMessage by getCanSendEvent(MessageEventType.ROOM_MESSAGE)
+        val userHasPermissionToSendMessage by room.canSendEventAsState(type = MessageEventType.ROOM_MESSAGE)
         val roomName: MutableState<String?> = rememberSaveable {
             mutableStateOf(null)
         }
@@ -222,13 +222,4 @@ 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
-    }
 }
diff --git a/libraries/matrixui/src/main/kotlin/io/element/android/libraries/matrix/ui/room/MatrixRoomState.kt b/libraries/matrixui/src/main/kotlin/io/element/android/libraries/matrix/ui/room/MatrixRoomState.kt
new file mode 100644
index 0000000000..19d7001342
--- /dev/null
+++ b/libraries/matrixui/src/main/kotlin/io/element/android/libraries/matrix/ui/room/MatrixRoomState.kt
@@ -0,0 +1,31 @@
+/*
+ * 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.ui.room
+
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.State
+import androidx.compose.runtime.produceState
+import io.element.android.libraries.matrix.api.room.MatrixRoom
+import io.element.android.libraries.matrix.api.room.MessageEventType
+
+@Composable
+fun MatrixRoom.canSendEventAsState(type: MessageEventType): State<Boolean> {
+    return produceState(initialValue = false, key1 = type) {
+        value = canSendEvent(type).getOrElse { false }
+    }
+}
+