Handle tapping on user mentions (#2021)

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

@@ -18,6 +18,7 @@ package io.element.android.libraries.matrix.api.permalink
 
 import android.net.Uri
 import androidx.compose.runtime.Immutable
+import io.element.android.libraries.matrix.api.core.RoomId
 import kotlinx.collections.immutable.ImmutableList
 
 /**
@@ -32,7 +33,15 @@ sealed interface PermalinkData {
         val isRoomAlias: Boolean,
         val eventId: String?,
         val viaParameters: ImmutableList<String>
-    ) : PermalinkData
+    ) : PermalinkData {
+        fun getRoomId(): RoomId? {
+            return roomIdOrAlias.takeIf { !isRoomAlias }?.let(::RoomId)
+        }
+
+        fun getRoomAlias(): String? {
+            return roomIdOrAlias.takeIf { isRoomAlias }
+        }
+    }
 
     /*
      * &room_name=Team2

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

@@ -16,7 +16,11 @@
 
 package io.element.android.libraries.matrix.api.room
 
+import io.element.android.libraries.matrix.api.core.RoomId
+import io.element.android.libraries.matrix.api.core.UserId
+
 sealed interface Mention {
-    data class User(val userId: String): Mention
+    data class User(val userId: UserId): Mention
     data object AtRoom: Mention
+    data class Room(val roomId: RoomId?, val roomAlias: String?): Mention
 }

libraries/matrix/api/src/test/kotlin/io/element/android/libraries/matrix/api/permalink/PermalinkDataTest.kt

@@ -0,0 +1,49 @@
+/*
+ * 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.permalink
+
+import com.google.common.truth.Truth.assertThat
+import kotlinx.collections.immutable.persistentListOf
+import org.junit.Test
+
+class PermalinkDataTest {
+
+    @Test
+    fun `getRoomId() returns value when isRoomAlias is false`() {
+        val permalinkData = PermalinkData.RoomLink(
+                roomIdOrAlias = "!abcdef123456:matrix.org",
+                isRoomAlias = false,
+                eventId = null,
+                viaParameters = persistentListOf(),
+        )
+        assertThat(permalinkData.getRoomId()).isNotNull()
+        assertThat(permalinkData.getRoomAlias()).isNull()
+    }
+
+    @Test
+    fun `getRoomAlias() returns value when isRoomAlias is true`() {
+        val permalinkData = PermalinkData.RoomLink(
+            roomIdOrAlias = "#room:matrix.org",
+            isRoomAlias = true,
+            eventId = null,
+            viaParameters = persistentListOf(),
+        )
+        assertThat(permalinkData.getRoomId()).isNull()
+        assertThat(permalinkData.getRoomAlias()).isNotNull()
+    }
+
+}