Extract actual feed loading code into separate method
Increase readability
This commit is contained in:
TobiGr
Stypox
parent
5c7c382323
commit
6ab8716e69
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@ -1,6 +1,7 @@
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package org.schabi.newpipe.local.feed.service
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import android.content.Context
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import android.content.SharedPreferences
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import androidx.preference.PreferenceManager
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import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers
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import io.reactivex.rxjava3.core.Completable
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@ -13,6 +14,7 @@ import io.reactivex.rxjava3.schedulers.Schedulers
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import org.schabi.newpipe.R
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import org.schabi.newpipe.database.feed.model.FeedGroupEntity
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import org.schabi.newpipe.database.subscription.NotificationMode
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import org.schabi.newpipe.database.subscription.SubscriptionEntity
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import org.schabi.newpipe.extractor.Info
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import org.schabi.newpipe.extractor.NewPipe
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import org.schabi.newpipe.extractor.feed.FeedInfo
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@ -108,99 +110,7 @@ class FeedLoadManager(private val context: Context) {
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.runOn(Schedulers.io(), PARALLEL_EXTRACTIONS * 2)
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.filter { !cancelSignal.get() }
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.map { subscriptionEntity ->
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var error: Throwable? = null
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val storeOriginalErrorAndRethrow = { e: Throwable ->
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// keep original to prevent blockingGet() from wrapping it into RuntimeException
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error = e
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throw e
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}
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try {
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// check for and load new streams
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// either by using the dedicated feed method or by getting the channel info
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var originalInfo: Info? = null
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var streams: List<StreamInfoItem>? = null
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val errors = ArrayList<Throwable>()
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if (useFeedExtractor) {
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NewPipe.getService(subscriptionEntity.serviceId)
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.getFeedExtractor(subscriptionEntity.url)
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?.also { feedExtractor ->
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// the user wants to use a feed extractor and there is one, use it
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val feedInfo = FeedInfo.getInfo(feedExtractor)
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errors.addAll(feedInfo.errors)
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originalInfo = feedInfo
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streams = feedInfo.relatedItems
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}
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}
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if (originalInfo == null) {
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// use the normal channel tabs extractor if either the user wants it, or
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// the current service does not have a dedicated feed extractor
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val channelInfo = getChannelInfo(
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subscriptionEntity.serviceId,
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subscriptionEntity.url, true
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)
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.onErrorReturn(storeOriginalErrorAndRethrow)
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.blockingGet()
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errors.addAll(channelInfo.errors)
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originalInfo = channelInfo
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streams = channelInfo.tabs
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.filter { tab ->
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ChannelTabHelper.fetchFeedChannelTab(
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context,
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defaultSharedPreferences,
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tab
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)
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}
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.map {
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Pair(
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getChannelTab(subscriptionEntity.serviceId, it, true)
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.onErrorReturn(storeOriginalErrorAndRethrow)
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.blockingGet(),
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it
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)
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}
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.flatMap { (channelTabInfo, linkHandler) ->
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errors.addAll(channelTabInfo.errors)
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if (channelTabInfo.relatedItems.isEmpty() &&
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channelTabInfo.nextPage != null
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) {
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val infoItemsPage = getMoreChannelTabItems(
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subscriptionEntity.serviceId,
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linkHandler, channelTabInfo.nextPage
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)
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.blockingGet()
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errors.addAll(infoItemsPage.errors)
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return@flatMap infoItemsPage.items
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} else {
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return@flatMap channelTabInfo.relatedItems
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}
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}
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.filterIsInstance<StreamInfoItem>()
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}
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return@map Notification.createOnNext(
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FeedUpdateInfo(
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subscriptionEntity,
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originalInfo!!,
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streams!!,
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errors,
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)
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)
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} catch (e: Throwable) {
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val request = "${subscriptionEntity.serviceId}:${subscriptionEntity.url}"
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val wrapper = FeedLoadService.RequestException(
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subscriptionEntity.uid,
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request,
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// do this to prevent blockingGet() from wrapping into RuntimeException
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error ?: e
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)
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return@map Notification.createOnError<FeedUpdateInfo>(wrapper)
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}
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loadStreams(subscriptionEntity, useFeedExtractor, defaultSharedPreferences)
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}
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.sequential()
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.observeOn(AndroidSchedulers.mainThread())
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@ -226,6 +136,107 @@ class FeedLoadManager(private val context: Context) {
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)
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}
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private fun loadStreams(
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subscriptionEntity: SubscriptionEntity,
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useFeedExtractor: Boolean,
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defaultSharedPreferences: SharedPreferences
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):
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Notification<FeedUpdateInfo> {
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var error: Throwable? = null
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val storeOriginalErrorAndRethrow = { e: Throwable ->
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// keep original to prevent blockingGet() from wrapping it into RuntimeException
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error = e
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throw e
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}
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try {
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// check for and load new streams
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// either by using the dedicated feed method or by getting the channel info
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var originalInfo: Info? = null
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var streams: List<StreamInfoItem>? = null
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val errors = ArrayList<Throwable>()
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if (useFeedExtractor) {
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NewPipe.getService(subscriptionEntity.serviceId)
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.getFeedExtractor(subscriptionEntity.url)
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?.also { feedExtractor ->
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// the user wants to use a feed extractor and there is one, use it
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val feedInfo = FeedInfo.getInfo(feedExtractor)
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errors.addAll(feedInfo.errors)
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originalInfo = feedInfo
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streams = feedInfo.relatedItems
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}
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}
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if (originalInfo == null) {
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// use the normal channel tabs extractor if either the user wants it, or
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// the current service does not have a dedicated feed extractor
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val channelInfo = getChannelInfo(
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subscriptionEntity.serviceId,
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subscriptionEntity.url, true
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)
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.onErrorReturn(storeOriginalErrorAndRethrow)
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.blockingGet()
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errors.addAll(channelInfo.errors)
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originalInfo = channelInfo
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streams = channelInfo.tabs
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.filter { tab ->
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ChannelTabHelper.fetchFeedChannelTab(
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context,
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defaultSharedPreferences,
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tab
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)
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}
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.map {
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Pair(
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getChannelTab(subscriptionEntity.serviceId, it, true)
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.onErrorReturn(storeOriginalErrorAndRethrow)
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.blockingGet(),
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it
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)
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}
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.flatMap { (channelTabInfo, linkHandler) ->
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errors.addAll(channelTabInfo.errors)
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if (channelTabInfo.relatedItems.isEmpty() &&
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channelTabInfo.nextPage != null
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) {
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val infoItemsPage = getMoreChannelTabItems(
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subscriptionEntity.serviceId,
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linkHandler, channelTabInfo.nextPage
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)
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.blockingGet()
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errors.addAll(infoItemsPage.errors)
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return@flatMap infoItemsPage.items
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} else {
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return@flatMap channelTabInfo.relatedItems
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}
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}
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.filterIsInstance<StreamInfoItem>()
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}
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return Notification.createOnNext(
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FeedUpdateInfo(
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subscriptionEntity,
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originalInfo!!,
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streams!!,
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errors,
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)
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)
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} catch (e: Throwable) {
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val request = "${subscriptionEntity.serviceId}:${subscriptionEntity.url}"
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val wrapper = FeedLoadService.RequestException(
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subscriptionEntity.uid,
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request,
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// do this to prevent blockingGet() from wrapping into RuntimeException
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error ?: e
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)
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return Notification.createOnError(wrapper)
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}
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}
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/**
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* Keep the feed and the stream tables small
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* to reduce loading times when trying to display the feed.
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