Change async/await constructs for withContext

app/src/main/java/chat/rocket/android/server/domain/GetChatRoomsInteractor.kt

@@ -2,39 +2,40 @@ package chat.rocket.android.server.domain
 
 import chat.rocket.core.model.ChatRoom
 import kotlinx.coroutines.experimental.CommonPool
-import kotlinx.coroutines.experimental.async
+import kotlinx.coroutines.experimental.withContext
 import javax.inject.Inject
 
 class GetChatRoomsInteractor @Inject constructor(private val repository: ChatRoomsRepository) {
     fun get(url: String) = repository.get(url)
 
-    suspend fun getByName(url: String, name: String): List<ChatRoom> {
-        val chatRooms = async {
+    /**
+     * Get a list of chat rooms that contains the name parameter.
+     *
+     * @param url The server url.
+     * @param name The name of chat room to look for or a chat room that contains this name.
+     * @return A list of ChatRoom objects with the given name.
+     */
+    suspend fun getByName(url: String, name: String): List<ChatRoom> = withContext(CommonPool) {
         val allChatRooms = repository.get(url)
         if (name.isEmpty()) {
-                return@async allChatRooms
+            return@withContext allChatRooms
         }
-            return@async allChatRooms.filter {
+        return@withContext allChatRooms.filter {
             it.name.contains(name, true)
         }
     }
-        return chatRooms.await()
-    }
 
     /**
      * Get a specific room by its id.
      *
      * @param serverUrl The server url where the room is.
      * @param roomId The id of the room to get.
-     *
      * @return The ChatRoom object or null if we couldn't find any.
      */
-    suspend fun getById(serverUrl: String, roomId: String): ChatRoom? {
-        return async(CommonPool) {
+    suspend fun getById(serverUrl: String, roomId: String): ChatRoom? = withContext(CommonPool) {
         val allChatRooms = repository.get(serverUrl)
-            return@async allChatRooms.first {
+        return@withContext allChatRooms.first {
             it.id == roomId
         }
-        }.await()
     }
 }
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