102 lines
4.0 KiB
Kotlin
102 lines
4.0 KiB
Kotlin
/* Copyright 2019 Tusky Contributors
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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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package com.keylesspalace.tusky.components.scheduled
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import android.util.Log
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import androidx.lifecycle.MutableLiveData
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import androidx.paging.DataSource
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import androidx.paging.ItemKeyedDataSource
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import com.keylesspalace.tusky.entity.ScheduledStatus
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import com.keylesspalace.tusky.network.MastodonApi
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import com.keylesspalace.tusky.util.NetworkState
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import io.reactivex.rxjava3.disposables.CompositeDisposable
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import io.reactivex.rxjava3.kotlin.addTo
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class ScheduledTootDataSourceFactory(
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private val mastodonApi: MastodonApi,
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private val disposables: CompositeDisposable
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): DataSource.Factory<String, ScheduledStatus>() {
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private val scheduledTootsCache = mutableListOf<ScheduledStatus>()
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private var dataSource: ScheduledTootDataSource? = null
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val networkState = MutableLiveData<NetworkState>()
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override fun create(): DataSource<String, ScheduledStatus> {
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return ScheduledTootDataSource(mastodonApi, disposables, scheduledTootsCache, networkState).also {
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dataSource = it
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}
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}
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fun reload() {
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scheduledTootsCache.clear()
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dataSource?.invalidate()
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}
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fun remove(status: ScheduledStatus) {
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scheduledTootsCache.remove(status)
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dataSource?.invalidate()
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}
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}
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class ScheduledTootDataSource(
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private val mastodonApi: MastodonApi,
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private val disposables: CompositeDisposable,
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private val scheduledTootsCache: MutableList<ScheduledStatus>,
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private val networkState: MutableLiveData<NetworkState>
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): ItemKeyedDataSource<String, ScheduledStatus>() {
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override fun loadInitial(params: LoadInitialParams<String>, callback: LoadInitialCallback<ScheduledStatus>) {
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if(scheduledTootsCache.isNotEmpty()) {
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callback.onResult(scheduledTootsCache.toList())
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} else {
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networkState.postValue(NetworkState.LOADING)
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mastodonApi.scheduledStatuses(limit = params.requestedLoadSize)
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.subscribe({ newData ->
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scheduledTootsCache.addAll(newData)
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callback.onResult(newData)
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networkState.postValue(NetworkState.LOADED)
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}, { throwable ->
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Log.w("ScheduledTootDataSource", "Error loading scheduled statuses", throwable)
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networkState.postValue(NetworkState.error(throwable.message))
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})
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.addTo(disposables)
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}
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}
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override fun loadAfter(params: LoadParams<String>, callback: LoadCallback<ScheduledStatus>) {
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mastodonApi.scheduledStatuses(limit = params.requestedLoadSize, maxId = params.key)
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.subscribe({ newData ->
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scheduledTootsCache.addAll(newData)
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callback.onResult(newData)
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}, { throwable ->
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Log.w("ScheduledTootDataSource", "Error loading scheduled statuses", throwable)
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networkState.postValue(NetworkState.error(throwable.message))
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})
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.addTo(disposables)
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}
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override fun loadBefore(params: LoadParams<String>, callback: LoadCallback<ScheduledStatus>) {
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// we are always loading from beginning to end
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}
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override fun getKey(item: ScheduledStatus): String {
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return item.id
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}
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} |