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EpisodeStore.kt
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EpisodeStore.kt
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/*
* Copyright 2020 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.example.jetcaster.data
import com.example.jetcaster.data.room.EpisodesDao
import kotlinx.coroutines.flow.Flow
/**
* A data repository for [Episode] instances.
*/
class EpisodeStore(
private val episodesDao: EpisodesDao
) {
/**
* Returns a flow containing the episode given [episodeUri].
*/
fun episodeWithUri(episodeUri: String): Flow<Episode> {
return episodesDao.episode(episodeUri)
}
/**
* Returns a flow containing the list of episodes associated with the podcast with the
* given [podcastUri].
*/
fun episodesInPodcast(
podcastUri: String,
limit: Int = Integer.MAX_VALUE
): Flow<List<Episode>> {
return episodesDao.episodesForPodcastUri(podcastUri, limit)
}
/**
* Add a new [Episode] to this store.
*
* This automatically switches to the main thread to maintain thread consistency.
*/
suspend fun addEpisodes(episodes: Collection<Episode>) = episodesDao.insertAll(episodes)
suspend fun isEmpty(): Boolean = episodesDao.count() == 0
}