115 lines
3.7 KiB
Kotlin
115 lines
3.7 KiB
Kotlin
/* Copyright 2017 Andrew Dawson
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*
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* This file is a part of Tusky.
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*
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* This program is free software; you can redistribute it and/or modify it under the terms of the
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* GNU General Public License as published by the Free Software Foundation; either version 3 of the
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* License, or (at your option) any later version.
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*
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* Tusky is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
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* the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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* Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with Tusky; if not,
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* see <http://www.gnu.org/licenses>.
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*/
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package com.keylesspalace.tusky.viewmodel
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import androidx.lifecycle.ViewModel
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import com.keylesspalace.tusky.entity.MastoList
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import com.keylesspalace.tusky.network.MastodonApi
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import com.keylesspalace.tusky.util.withoutFirstWhich
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import com.keylesspalace.tusky.util.replacedFirstWhich
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import io.reactivex.Observable
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import io.reactivex.disposables.CompositeDisposable
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import io.reactivex.rxkotlin.addTo
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import io.reactivex.subjects.BehaviorSubject
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import io.reactivex.subjects.PublishSubject
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import java.io.IOException
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import java.net.ConnectException
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import javax.inject.Inject
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internal class ListsViewModel @Inject constructor(private val api: MastodonApi) : ViewModel() {
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enum class LoadingState {
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INITIAL, LOADING, LOADED, ERROR_NETWORK, ERROR_OTHER
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}
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enum class Event {
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CREATE_ERROR, DELETE_ERROR, RENAME_ERROR
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}
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data class State(val lists: List<MastoList>, val loadingState: LoadingState)
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val state: Observable<State> get() = _state
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val events: Observable<Event> get() = _events
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private val _state = BehaviorSubject.createDefault(State(listOf(), LoadingState.INITIAL))
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private val _events = PublishSubject.create<Event>()
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private val disposable = CompositeDisposable()
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fun retryLoading() {
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loadIfNeeded()
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}
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private fun loadIfNeeded() {
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val state = _state.value!!
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if (state.loadingState == LoadingState.LOADING || state.lists.isNotEmpty()) return
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updateState {
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copy(loadingState = LoadingState.LOADING)
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}
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api.getLists().subscribe({ lists ->
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updateState {
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copy(
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lists = lists,
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loadingState = LoadingState.LOADED
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)
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}
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}, { err ->
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updateState {
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copy(loadingState = if (err is IOException || err is ConnectException)
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LoadingState.ERROR_NETWORK else LoadingState.ERROR_OTHER)
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}
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}).addTo(disposable)
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}
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fun createNewList(listName: String) {
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api.createList(listName).subscribe({ list ->
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updateState {
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copy(lists = lists + list)
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}
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}, {
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sendEvent(Event.CREATE_ERROR)
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}).addTo(disposable)
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}
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fun renameList(listId: String, listName: String) {
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api.updateList(listId, listName).subscribe({ list ->
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updateState {
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copy(lists = lists.replacedFirstWhich(list) { it.id == listId })
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}
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}, {
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sendEvent(Event.RENAME_ERROR)
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}).addTo(disposable)
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}
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fun deleteList(listId: String) {
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api.deleteList(listId).subscribe({
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updateState {
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copy(lists = lists.withoutFirstWhich { it.id == listId })
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}
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}, {
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sendEvent(Event.DELETE_ERROR)
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}).addTo(disposable)
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}
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private inline fun updateState(crossinline fn: State.() -> State) {
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_state.onNext(fn(_state.value!!))
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}
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private fun sendEvent(event: Event) {
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_events.onNext(event)
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}
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}
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