Create a MatrixItemHelper to avoid duplicated code.

libraries/matrixui/src/main/java/io/element/android/x/matrix/ui/MatrixItemHelper.kt

@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 2022 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.x.matrix.ui
+
+import io.element.android.x.designsystem.components.avatar.AvatarData
+import io.element.android.x.designsystem.components.avatar.AvatarSize
+import io.element.android.x.matrix.MatrixClient
+import io.element.android.x.matrix.media.MediaResolver
+import io.element.android.x.matrix.room.MatrixRoom
+import io.element.android.x.matrix.room.RoomSummary
+import io.element.android.x.matrix.ui.model.MatrixUser
+import kotlinx.coroutines.FlowPreview
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.asFlow
+
+class MatrixItemHelper(
+    private val client: MatrixClient
+) {
+    /**
+     * TODO Make username and avatar live...
+     */
+    @OptIn(FlowPreview::class)
+    fun getCurrentUserData(avatarSize: AvatarSize): Flow<MatrixUser> {
+        return suspend {
+            val userAvatarUrl = client.loadUserAvatarURLString().getOrNull()
+            val userDisplayName = client.loadUserDisplayName().getOrNull()
+            val avatarData =
+                loadAvatarData(
+                    userDisplayName ?: client.userId().value,
+                    userAvatarUrl,
+                    avatarSize
+                )
+            MatrixUser(
+                id = client.userId(),
+                username = userDisplayName,
+                avatarUrl = userAvatarUrl,
+                avatarData = avatarData,
+            )
+        }.asFlow()
+    }
+
+    suspend fun loadAvatarData(room: MatrixRoom, size: AvatarSize): AvatarData {
+        return loadAvatarData(
+            name = room.name ?: room.roomId.value,
+            url = room.avatarUrl,
+            size = size
+        )
+    }
+
+    suspend fun loadAvatarData(roomSummary: RoomSummary.Filled, size: AvatarSize): AvatarData {
+        return loadAvatarData(
+            name = roomSummary.details.name,
+            url = roomSummary.details.avatarURLString,
+            size = size
+        )
+    }
+
+    suspend fun loadAvatarData(
+        name: String,
+        url: String?,
+        size: AvatarSize
+    ): AvatarData {
+        val model = client.mediaResolver()
+            .resolve(url, kind = MediaResolver.Kind.Thumbnail(size.value))
+        return AvatarData(name, model, size)
+    }
+}