Room list : add quick ordering

app/src/main/java/im/vector/riotredesign/features/home/HomeModule.kt

@@ -27,6 +27,7 @@ import im.vector.riotredesign.features.home.room.detail.timeline.TimelineDateFor
 import im.vector.riotredesign.features.home.room.detail.timeline.TimelineEventController
 import im.vector.riotredesign.features.home.room.detail.timeline.TimelineItemFactory
 import im.vector.riotredesign.features.home.room.detail.timeline.helper.TimelineMediaSizeProvider
+import im.vector.riotredesign.features.home.room.list.RoomSummaryComparator
 import im.vector.riotredesign.features.home.room.list.RoomSummaryController
 import org.koin.dsl.module.module
 
@@ -90,6 +91,10 @@ class HomeModule {
             HomePermalinkHandler(get())
         }
 
+        single {
+            RoomSummaryComparator()
+        }
+
 
     }
 }

app/src/main/java/im/vector/riotredesign/features/home/room/list/RoomListViewModel.kt

@@ -40,7 +40,8 @@ class RoomListViewModel(initialState: RoomListViewState,
                         private val session: Session,
                         private val selectedGroupHolder: SelectedGroupHolder,
                         private val visibleRoomHolder: VisibleRoomHolder,
-                        private val roomSelectionRepository: RoomSelectionRepository)
+                        private val roomSelectionRepository: RoomSelectionRepository,
+                        private val roomSummaryComparator: RoomSummaryComparator)
     : RiotViewModel<RoomListViewState>(initialState) {
 
     companion object : MvRxViewModelFactory<RoomListViewModel, RoomListViewState> {
@@ -51,7 +52,8 @@ class RoomListViewModel(initialState: RoomListViewState,
             val roomSelectionRepository = viewModelContext.activity.get<RoomSelectionRepository>()
             val selectedGroupHolder = viewModelContext.activity.get<SelectedGroupHolder>()
             val visibleRoomHolder = viewModelContext.activity.get<VisibleRoomHolder>()
-            return RoomListViewModel(state, currentSession, selectedGroupHolder, visibleRoomHolder, roomSelectionRepository)
+            val roomSummaryComparator = viewModelContext.activity.get<RoomSummaryComparator>()
+            return RoomListViewModel(state, currentSession, selectedGroupHolder, visibleRoomHolder, roomSelectionRepository, roomSummaryComparator)
         }
     }
 
@@ -154,7 +156,14 @@ class RoomListViewModel(initialState: RoomListViewState,
                 else                                          -> groupRooms.add(room)
             }
         }
-        return RoomSummaries(favourites, directChats, groupRooms, lowPriorities, serverNotices)
+
+        return RoomSummaries(
+                favourites = favourites.sortedWith(roomSummaryComparator),
+                directRooms = directChats.sortedWith(roomSummaryComparator),
+                groupRooms = groupRooms.sortedWith(roomSummaryComparator),
+                lowPriorities = lowPriorities.sortedWith(roomSummaryComparator),
+                serverNotices = serverNotices.sortedWith(roomSummaryComparator)
+        )
     }
 
 

app/src/main/java/im/vector/riotredesign/features/home/room/list/RoomSummaryComparator.kt

@@ -0,0 +1,70 @@
+/*
+ * Copyright 2019 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 im.vector.riotredesign.features.home.room.list
+
+import im.vector.matrix.android.api.session.room.model.RoomSummary
+
+class RoomSummaryComparator
+    : Comparator<RoomSummary> {
+
+    override fun compare(leftRoomSummary: RoomSummary?, rightRoomSummary: RoomSummary?): Int {
+        val retValue: Int
+        var leftHighlightCount = 0
+        var rightHighlightCount = 0
+        var leftNotificationCount = 0
+        var rightNotificationCount = 0
+        var rightTimestamp = 0L
+        var leftTimestamp = 0L
+
+        if (null != leftRoomSummary) {
+            leftHighlightCount = leftRoomSummary.highlightCount
+            leftNotificationCount = leftRoomSummary.notificationCount
+            leftTimestamp = leftRoomSummary.lastMessage?.originServerTs ?: 0
+        }
+        if (null != rightRoomSummary) {
+            rightHighlightCount = rightRoomSummary.highlightCount
+            rightNotificationCount = rightRoomSummary.notificationCount
+            rightTimestamp = rightRoomSummary.lastMessage?.originServerTs ?: 0
+        }
+
+        if (leftRoomSummary?.lastMessage == null) {
+            retValue = 1
+        } else if (rightRoomSummary?.lastMessage == null) {
+            retValue = -1
+        } else if (rightHighlightCount > 0 && leftHighlightCount == 0) {
+            retValue = 1
+        } else if (rightHighlightCount == 0 && leftHighlightCount > 0) {
+            retValue = -1
+        } else if (rightNotificationCount > 0 && leftNotificationCount == 0) {
+            retValue = 1
+        } else if (rightNotificationCount == 0 && leftNotificationCount > 0) {
+            retValue = -1
+        } else {
+            val deltaTimestamp = rightTimestamp - leftTimestamp
+            if (deltaTimestamp > 0) {
+                retValue = 1
+            } else if (deltaTimestamp < 0) {
+                retValue = -1
+            } else {
+                retValue = 0
+            }
+        }
+        return retValue
+
+    }
+
+}

app/src/main/java/im/vector/riotredesign/features/home/room/list/RoomSummaryController.kt

@@ -25,11 +25,11 @@ import im.vector.riotredesign.core.resources.StringProvider
 class RoomSummaryController(private val stringProvider: StringProvider
 ) : TypedEpoxyController<RoomListViewState>() {
 
-    private var isDirectRoomsExpanded = true
-    private var isGroupRoomsExpanded = true
     private var isFavoriteRoomsExpanded = true
-    private var isLowPriorityRoomsExpanded = true
-    private var isServerNoticeRoomsExpanded = true
+    private var isDirectRoomsExpanded = false
+    private var isGroupRoomsExpanded = false
+    private var isLowPriorityRoomsExpanded = false
+    private var isServerNoticeRoomsExpanded = false
 
     var callback: Callback? = null
 
@@ -79,7 +79,11 @@ class RoomSummaryController(private val stringProvider: StringProvider
 
     private fun buildRoomCategory(viewState: RoomListViewState, summaries: List<RoomSummary>, @StringRes titleRes: Int, isExpanded: Boolean, mutateExpandedState: () -> Unit) {
         //TODO should add some business logic later
-        val unreadCount = summaries.map { it.notificationCount }.reduce { acc, i -> acc + i }
+        val unreadCount = if (summaries.isEmpty()) {
+            0
+        } else {
+            summaries.map { it.notificationCount }.reduce { acc, i -> acc + i }
+        }
         val showHighlighted = summaries.any { it.highlightCount > 0 }
         RoomCategoryItem(
                 title = stringProvider.getString(titleRes).toUpperCase(),