forked from GitHub-Mirror/riotX-android
48 lines
1.7 KiB
Kotlin
48 lines
1.7 KiB
Kotlin
/*
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* Copyright 2019 New Vector Ltd
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package im.vector.riotx.features.home.room.list
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import im.vector.matrix.android.api.session.room.model.RoomSummary
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import javax.inject.Inject
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class ChronologicalRoomComparator @Inject constructor() : Comparator<RoomSummary> {
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override fun compare(leftRoomSummary: RoomSummary?, rightRoomSummary: RoomSummary?): Int {
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var rightTimestamp = 0L
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var leftTimestamp = 0L
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if (null != leftRoomSummary) {
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leftTimestamp = leftRoomSummary.latestPreviewableEvent?.root?.originServerTs ?: 0
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}
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if (null != rightRoomSummary) {
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rightTimestamp = rightRoomSummary.latestPreviewableEvent?.root?.originServerTs ?: 0
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}
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return if (rightRoomSummary?.latestPreviewableEvent?.root == null) {
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-1
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} else if (leftRoomSummary?.latestPreviewableEvent?.root == null) {
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1
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} else {
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val deltaTimestamp = rightTimestamp - leftTimestamp
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if (deltaTimestamp > 0) {
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1
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} else if (deltaTimestamp < 0) {
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-1
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} else {
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0
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}
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}
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}
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} |