40 lines
1.3 KiB
Kotlin
40 lines
1.3 KiB
Kotlin
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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package org.mozilla.fenix.library.history
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import androidx.lifecycle.LiveData
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import androidx.lifecycle.MutableLiveData
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import androidx.lifecycle.ViewModel
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import androidx.paging.LivePagedListBuilder
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import androidx.paging.PagedList
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import org.mozilla.fenix.components.history.PagedHistoryProvider
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class HistoryViewModel(historyProvider: PagedHistoryProvider) : ViewModel() {
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var history: LiveData<PagedList<HistoryItem>>
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var userHasHistory = MutableLiveData(true)
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private val datasource: LiveData<HistoryDataSource>
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init {
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val historyDataSourceFactory = HistoryDataSourceFactory(historyProvider)
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datasource = historyDataSourceFactory.datasource
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history = LivePagedListBuilder(historyDataSourceFactory, PAGE_SIZE)
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.setBoundaryCallback(object : PagedList.BoundaryCallback<HistoryItem>() {
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override fun onZeroItemsLoaded() {
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userHasHistory.value = false
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}
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})
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.build()
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}
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fun invalidate() {
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datasource.value?.invalidate()
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}
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companion object {
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private const val PAGE_SIZE = 25
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}
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}
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