create room : improve handling of room address

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

@@ -168,3 +168,13 @@ fun MatrixClient.getRoomInfoFlow(roomIdOrAlias: RoomIdOrAlias): Flow<Optional<Ma
         .map { roomSummary -> roomSummary.map { it.info } }
         .distinctUntilChanged()
 }
+
+/**
+ * Returns a room alias from a room alias name.
+ * @param name the room alias name ie. the local part of the room alias.
+ */
+fun MatrixClient.roomAliasFromName(name: String): Result<RoomAlias> {
+    return runCatching {
+        RoomAlias("#$name:${userIdServerName()}")
+    }
+}

libraries/matrix/api/src/main/kotlin/io/element/android/libraries/matrix/api/createroom/CreateRoomParameters.kt

@@ -20,5 +20,5 @@ data class CreateRoomParameters(
     val invite: List<UserId>? = null,
     val avatar: String? = null,
     val joinRuleOverride: JoinRuleOverride = JoinRuleOverride.None,
-    val canonicalAlias: Optional<String> = Optional.empty(),
+    val roomAliasName: Optional<String> = Optional.empty(),
 )

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

@@ -0,0 +1,15 @@
+/*
+ * Copyright 2024 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ * Please see LICENSE in the repository root for full details.
+ */
+
+package io.element.android.libraries.matrix.api.room.alias
+
+import io.element.android.libraries.matrix.api.core.RoomAlias
+
+interface RoomAliasHelper {
+    fun roomAliasNameFromRoomDisplayName(name: String): String
+    fun isRoomAliasValid(roomAlias: RoomAlias): Boolean
+}