61 lines
2.0 KiB
Kotlin
61 lines
2.0 KiB
Kotlin
/*
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* Copyright (C) 2018 The Android Open Source Project
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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 com.h.pixeldroid.fragments.feeds.cachedFeeds
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import androidx.paging.*
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import com.h.pixeldroid.db.AppDatabase
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import com.h.pixeldroid.db.dao.feedContent.FeedContentDao
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import com.h.pixeldroid.objects.FeedContentDatabase
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import kotlinx.coroutines.flow.Flow
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import javax.inject.Inject
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/**
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* Repository class that works with local and remote data sources.
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*/
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class FeedContentRepository<T: FeedContentDatabase> @ExperimentalPagingApi
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@Inject constructor(
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private val db: AppDatabase,
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private val dao: FeedContentDao<T>,
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private val mediator: RemoteMediator<Int, T>
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) {
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/**
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* [FeedContentDatabase], exposed as a stream of data that will emit
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* every time we get more data from the network.
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*/
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fun stream(): Flow<PagingData<T>> {
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val pagingSourceFactory = {
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val user = db.userDao().getActiveUser()!!
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dao.feedContent(user.user_id, user.instance_uri)
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}
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return Pager(
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config = PagingConfig(initialLoadSize = NETWORK_PAGE_SIZE,
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pageSize = NETWORK_PAGE_SIZE,
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enablePlaceholders = false,
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prefetchDistance = 50
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),
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remoteMediator = mediator,
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pagingSourceFactory = pagingSourceFactory
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).flow
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}
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companion object {
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private const val NETWORK_PAGE_SIZE = 20
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}
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} |