forked from GitHub-Mirror/riotX-android
115 lines
4.5 KiB
Kotlin
115 lines
4.5 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.group
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import androidx.lifecycle.LiveData
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import androidx.lifecycle.MutableLiveData
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import arrow.core.Option
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import com.airbnb.mvrx.FragmentViewModelContext
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import com.airbnb.mvrx.MvRxViewModelFactory
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import com.airbnb.mvrx.ViewModelContext
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import com.squareup.inject.assisted.Assisted
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import com.squareup.inject.assisted.AssistedInject
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import im.vector.matrix.android.api.session.Session
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import im.vector.matrix.android.api.session.group.model.GroupSummary
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import im.vector.matrix.android.api.session.user.model.User
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import im.vector.matrix.rx.rx
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import im.vector.riotx.R
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import im.vector.riotx.core.platform.VectorViewModel
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import im.vector.riotx.core.resources.StringProvider
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import im.vector.riotx.core.utils.LiveEvent
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import io.reactivex.Observable
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import io.reactivex.functions.BiFunction
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import timber.log.Timber
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import java.util.concurrent.TimeUnit
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const val ALL_COMMUNITIES_GROUP_ID = "ALL_COMMUNITIES_GROUP_ID"
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class GroupListViewModel @AssistedInject constructor(@Assisted initialState: GroupListViewState,
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private val selectedGroupHolder: SelectedGroupStore,
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private val session: Session,
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private val stringProvider: StringProvider
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) : VectorViewModel<GroupListViewState>(initialState) {
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@AssistedInject.Factory
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interface Factory {
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fun create(initialState: GroupListViewState): GroupListViewModel
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}
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companion object : MvRxViewModelFactory<GroupListViewModel, GroupListViewState> {
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@JvmStatic
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override fun create(viewModelContext: ViewModelContext, state: GroupListViewState): GroupListViewModel? {
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val groupListFragment: GroupListFragment = (viewModelContext as FragmentViewModelContext).fragment()
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return groupListFragment.groupListViewModelFactory.create(state)
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}
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}
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private val _openGroupLiveData = MutableLiveData<LiveEvent<GroupSummary>>()
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val openGroupLiveData: LiveData<LiveEvent<GroupSummary>>
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get() = _openGroupLiveData
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init {
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observeGroupSummaries()
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observeSelectionState()
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}
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private fun observeSelectionState() {
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selectSubscribe(GroupListViewState::selectedGroup) {
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if (it != null) {
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_openGroupLiveData.postValue(LiveEvent(it))
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val optionGroup = Option.fromNullable(it)
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selectedGroupHolder.post(optionGroup)
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}
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}
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}
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fun accept(action: GroupListActions) {
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when (action) {
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is GroupListActions.SelectGroup -> handleSelectGroup(action)
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}
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}
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// PRIVATE METHODS *****************************************************************************
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private fun handleSelectGroup(action: GroupListActions.SelectGroup) = withState { state ->
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if (state.selectedGroup?.groupId != action.groupSummary.groupId) {
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setState { copy(selectedGroup = action.groupSummary) }
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}
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}
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private fun observeGroupSummaries() {
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Observable.combineLatest<User?, List<GroupSummary>, List<GroupSummary>>(
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session.rx().liveUser(session.myUserId),
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session.rx().liveGroupSummaries(),
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BiFunction { user, groupSummary ->
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val allCommunityGroup = GroupSummary(
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groupId = ALL_COMMUNITIES_GROUP_ID,
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displayName = stringProvider.getString(R.string.group_all_communities),
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avatarUrl = user.avatarUrl ?: "")
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listOf(allCommunityGroup) + groupSummary
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}
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).execute { async ->
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// TODO Phase2 Handle the case where the selected group is deleted on another client
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val newSelectedGroup = selectedGroup ?: async()?.firstOrNull()
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copy(asyncGroups = async, selectedGroup = newSelectedGroup)
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}
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}
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} |