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Code Issues Releases Activity

Extract actual feed loading code into separate method

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Increase readability
This commit is contained in:
TobiGr 2023-08-22 12:37:02 +02:00 committed by Stypox
parent 5c7c382323
commit 6ab8716e69
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1 changed files with 104 additions and 93 deletions
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197
app/src/main/java/org/schabi/newpipe/local/feed/service/FeedLoadManager.kt
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@ -1,6 +1,7 @@
package org.schabi.newpipe.local.feed.service
import android.content.Context
import android.content.SharedPreferences
import androidx.preference.PreferenceManager
import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers
import io.reactivex.rxjava3.core.Completable
@ -13,6 +14,7 @@ import io.reactivex.rxjava3.schedulers.Schedulers
import org.schabi.newpipe.R
import org.schabi.newpipe.database.feed.model.FeedGroupEntity
import org.schabi.newpipe.database.subscription.NotificationMode
import org.schabi.newpipe.database.subscription.SubscriptionEntity
import org.schabi.newpipe.extractor.Info
import org.schabi.newpipe.extractor.NewPipe
import org.schabi.newpipe.extractor.feed.FeedInfo
@ -108,99 +110,7 @@ class FeedLoadManager(private val context: Context) {
.runOn(Schedulers.io(), PARALLEL_EXTRACTIONS * 2)
.filter { !cancelSignal.get() }
.map { subscriptionEntity ->
var error: Throwable? = null
val storeOriginalErrorAndRethrow = { e: Throwable ->
// keep original to prevent blockingGet() from wrapping it into RuntimeException
error = e
throw e
}
try {
// check for and load new streams
// either by using the dedicated feed method or by getting the channel info
var originalInfo: Info? = null
var streams: List<StreamInfoItem>? = null
val errors = ArrayList<Throwable>()
if (useFeedExtractor) {
NewPipe.getService(subscriptionEntity.serviceId)
.getFeedExtractor(subscriptionEntity.url)
?.also { feedExtractor ->
// the user wants to use a feed extractor and there is one, use it
val feedInfo = FeedInfo.getInfo(feedExtractor)
errors.addAll(feedInfo.errors)
originalInfo = feedInfo
streams = feedInfo.relatedItems
}
}
if (originalInfo == null) {
// use the normal channel tabs extractor if either the user wants it, or
// the current service does not have a dedicated feed extractor
val channelInfo = getChannelInfo(
subscriptionEntity.serviceId,
subscriptionEntity.url, true
)
.onErrorReturn(storeOriginalErrorAndRethrow)
.blockingGet()
errors.addAll(channelInfo.errors)
originalInfo = channelInfo
streams = channelInfo.tabs
.filter { tab ->
ChannelTabHelper.fetchFeedChannelTab(
context,
defaultSharedPreferences,
tab
)
}
.map {
Pair(
getChannelTab(subscriptionEntity.serviceId, it, true)
.onErrorReturn(storeOriginalErrorAndRethrow)
.blockingGet(),
it
)
}
.flatMap { (channelTabInfo, linkHandler) ->
errors.addAll(channelTabInfo.errors)
if (channelTabInfo.relatedItems.isEmpty() &&
channelTabInfo.nextPage != null
) {
val infoItemsPage = getMoreChannelTabItems(
subscriptionEntity.serviceId,
linkHandler, channelTabInfo.nextPage
)
.blockingGet()
errors.addAll(infoItemsPage.errors)
return@flatMap infoItemsPage.items
} else {
return@flatMap channelTabInfo.relatedItems
}
}
.filterIsInstance<StreamInfoItem>()
}
return@map Notification.createOnNext(
FeedUpdateInfo(
subscriptionEntity,
originalInfo!!,
streams!!,
errors,
)
)
} catch (e: Throwable) {
val request = "${subscriptionEntity.serviceId}:${subscriptionEntity.url}"
val wrapper = FeedLoadService.RequestException(
subscriptionEntity.uid,
request,
// do this to prevent blockingGet() from wrapping into RuntimeException
error ?: e
)
return@map Notification.createOnError<FeedUpdateInfo>(wrapper)
}
loadStreams(subscriptionEntity, useFeedExtractor, defaultSharedPreferences)
}
.sequential()
.observeOn(AndroidSchedulers.mainThread())
@ -226,6 +136,107 @@ class FeedLoadManager(private val context: Context) {
)
}
private fun loadStreams(
subscriptionEntity: SubscriptionEntity,
useFeedExtractor: Boolean,
defaultSharedPreferences: SharedPreferences
):
Notification<FeedUpdateInfo> {
var error: Throwable? = null
val storeOriginalErrorAndRethrow = { e: Throwable ->
// keep original to prevent blockingGet() from wrapping it into RuntimeException
error = e
throw e
}
try {
// check for and load new streams
// either by using the dedicated feed method or by getting the channel info
var originalInfo: Info? = null
var streams: List<StreamInfoItem>? = null
val errors = ArrayList<Throwable>()
if (useFeedExtractor) {
NewPipe.getService(subscriptionEntity.serviceId)
.getFeedExtractor(subscriptionEntity.url)
?.also { feedExtractor ->
// the user wants to use a feed extractor and there is one, use it
val feedInfo = FeedInfo.getInfo(feedExtractor)
errors.addAll(feedInfo.errors)
originalInfo = feedInfo
streams = feedInfo.relatedItems
}
}
if (originalInfo == null) {
// use the normal channel tabs extractor if either the user wants it, or
// the current service does not have a dedicated feed extractor
val channelInfo = getChannelInfo(
subscriptionEntity.serviceId,
subscriptionEntity.url, true
)
.onErrorReturn(storeOriginalErrorAndRethrow)
.blockingGet()
errors.addAll(channelInfo.errors)
originalInfo = channelInfo
streams = channelInfo.tabs
.filter { tab ->
ChannelTabHelper.fetchFeedChannelTab(
context,
defaultSharedPreferences,
tab
)
}
.map {
Pair(
getChannelTab(subscriptionEntity.serviceId, it, true)
.onErrorReturn(storeOriginalErrorAndRethrow)
.blockingGet(),
it
)
}
.flatMap { (channelTabInfo, linkHandler) ->
errors.addAll(channelTabInfo.errors)
if (channelTabInfo.relatedItems.isEmpty() &&
channelTabInfo.nextPage != null
) {
val infoItemsPage = getMoreChannelTabItems(
subscriptionEntity.serviceId,
linkHandler, channelTabInfo.nextPage
)
.blockingGet()
errors.addAll(infoItemsPage.errors)
return@flatMap infoItemsPage.items
} else {
return@flatMap channelTabInfo.relatedItems
}
}
.filterIsInstance<StreamInfoItem>()
}
return Notification.createOnNext(
FeedUpdateInfo(
subscriptionEntity,
originalInfo!!,
streams!!,
errors,
)
)
} catch (e: Throwable) {
val request = "${subscriptionEntity.serviceId}:${subscriptionEntity.url}"
val wrapper = FeedLoadService.RequestException(
subscriptionEntity.uid,
request,
// do this to prevent blockingGet() from wrapping into RuntimeException
error ?: e
)
return Notification.createOnError(wrapper)
}
}
/**
* Keep the feed and the stream tables small
* to reduce loading times when trying to display the feed.