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Avoid going to db when a library filter is changed

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This commit is contained in:
len 2016-12-04 23:48:29 +01:00
parent aba528b227
commit 3d2a98451b
3 changed files with 74 additions and 77 deletions
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8
app/src/main/java/eu/kanade/tachiyomi/ui/library/LibraryCategoryAdapter.kt
View file

@ -23,7 +23,7 @@ class LibraryCategoryAdapter(val fragment: LibraryCategoryView) :
/**
* The list of manga in this category.
*/
private var mangas: List<Manga>? = null
private var mangas: List<Manga> = emptyList()
init {
setHasStableIds(true)
@ -37,7 +37,7 @@ class LibraryCategoryAdapter(val fragment: LibraryCategoryView) :
fun setItems(list: List<Manga>) {
mItems = list
// A copy of manga that it's always unfiltered
// A copy of manga always unfiltered.
mangas = ArrayList(list)
updateDataSet(null)
}
@ -58,11 +58,9 @@ class LibraryCategoryAdapter(val fragment: LibraryCategoryView) :
* @param param the filter. Not used.
*/
override fun updateDataSet(param: String?) {
mangas?.let {
filterItems(it)
filterItems(mangas)
notifyDataSetChanged()
}
}
/**
* Filters a manga depending on a query.

8
app/src/main/java/eu/kanade/tachiyomi/ui/library/LibraryFragment.kt
View file

@ -153,7 +153,7 @@ class LibraryFragment : BaseRxFragment<LibraryPresenter>(), ActionMode.Callback
if (savedState != null) {
activeCategory = savedState.getInt(CATEGORY_KEY)
query = savedState.getString(QUERY_KEY)
presenter.searchSubject.onNext(query)
presenter.searchSubject.call(query)
if (presenter.selectedMangas.isNotEmpty()) {
createActionModeIfNeeded()
}
@ -301,7 +301,7 @@ class LibraryFragment : BaseRxFragment<LibraryPresenter>(), ActionMode.Callback
* Applies filter change
*/
private fun onFilterOrSortChanged() {
presenter.resubscribeLibrary()
presenter.requestLibraryUpdate()
activity.supportInvalidateOptionsMenu()
}
@ -346,7 +346,7 @@ class LibraryFragment : BaseRxFragment<LibraryPresenter>(), ActionMode.Callback
// Notify the subject the query has changed.
if (isResumed) {
presenter.searchSubject.onNext(query)
presenter.searchSubject.call(query)
}
}
@ -374,7 +374,7 @@ class LibraryFragment : BaseRxFragment<LibraryPresenter>(), ActionMode.Callback
view_pager.post { if (isAdded) tabs.setScrollPosition(view_pager.currentItem, 0f, true) }
// Send the manga map to child fragments after the adapter is updated.
presenter.libraryMangaSubject.onNext(LibraryMangaEvent(mangaMap))
presenter.libraryMangaSubject.call(LibraryMangaEvent(mangaMap))
}
/**

135
app/src/main/java/eu/kanade/tachiyomi/ui/library/LibraryPresenter.kt
View file

@ -2,6 +2,8 @@ package eu.kanade.tachiyomi.ui.library
import android.os.Bundle
import android.util.Pair
import com.jakewharton.rxrelay.BehaviorRelay
import com.jakewharton.rxrelay.PublishRelay
import eu.kanade.tachiyomi.Constants
import eu.kanade.tachiyomi.data.cache.CoverCache
import eu.kanade.tachiyomi.data.database.DatabaseHelper
@ -13,11 +15,11 @@ import eu.kanade.tachiyomi.data.preference.PreferencesHelper
import eu.kanade.tachiyomi.data.preference.getOrDefault
import eu.kanade.tachiyomi.data.source.SourceManager
import eu.kanade.tachiyomi.ui.base.presenter.BasePresenter
import eu.kanade.tachiyomi.util.isNullOrUnsubscribed
import rx.Observable
import rx.Subscription
import rx.android.schedulers.AndroidSchedulers
import rx.schedulers.Schedulers
import rx.subjects.BehaviorSubject
import rx.subjects.PublishSubject
import uy.kohesive.injekt.injectLazy
import java.io.IOException
import java.io.InputStream
@ -28,6 +30,31 @@ import java.util.*
*/
class LibraryPresenter : BasePresenter<LibraryFragment>() {
/**
* Database.
*/
private val db: DatabaseHelper by injectLazy()
/**
* Preferences.
*/
private val preferences: PreferencesHelper by injectLazy()
/**
* Cover cache.
*/
private val coverCache: CoverCache by injectLazy()
/**
* Source manager.
*/
private val sourceManager: SourceManager by injectLazy()
/**
* Download manager.
*/
private val downloadManager: DownloadManager by injectLazy()
/**
* Categories of the library.
*/
@ -41,61 +68,52 @@ class LibraryPresenter : BasePresenter<LibraryFragment>() {
/**
* Search query of the library.
*/
val searchSubject: BehaviorSubject<String> = BehaviorSubject.create()
val searchSubject: BehaviorRelay<String> = BehaviorRelay.create()
/**
* Subject to notify the library's viewpager for updates.
*/
val libraryMangaSubject: BehaviorSubject<LibraryMangaEvent> = BehaviorSubject.create()
val libraryMangaSubject: BehaviorRelay<LibraryMangaEvent> = BehaviorRelay.create()
/**
* Subject to notify the UI of selection updates.
*/
val selectionSubject: PublishSubject<LibrarySelectionEvent> = PublishSubject.create()
val selectionSubject: PublishRelay<LibrarySelectionEvent> = PublishRelay.create()
/**
* Database.
* Relay used to apply the UI filters to the last emission of the library.
*/
val db: DatabaseHelper by injectLazy()
private val updateTriggerRelay = BehaviorRelay.create(Unit)
/**
* Preferences.
* Library subscription.
*/
val preferences: PreferencesHelper by injectLazy()
/**
* Cover cache.
*/
val coverCache: CoverCache by injectLazy()
/**
* Source manager.
*/
val sourceManager: SourceManager by injectLazy()
/**
* Download manager.
*/
val downloadManager: DownloadManager by injectLazy()
companion object {
/**
* Id of the restartable that listens for library updates.
*/
const val GET_LIBRARY = 1
}
private var librarySubscription: Subscription? = null
override fun onCreate(savedState: Bundle?) {
super.onCreate(savedState)
restartableLatestCache(GET_LIBRARY,
{ getLibraryObservable() },
{ view, pair -> view.onNextLibraryUpdate(pair.first, pair.second) })
if (savedState == null) {
start(GET_LIBRARY)
subscribeLibrary()
}
/**
* Subscribes to library if needed.
*/
fun subscribeLibrary() {
if (librarySubscription.isNullOrUnsubscribed()) {
librarySubscription = Observable.combineLatest(getLibraryObservable(),
updateTriggerRelay.observeOn(Schedulers.io()),
{ library, updateTrigger -> library })
.map { Pair(it.first, applyFilters(it.second)) }
.observeOn(AndroidSchedulers.mainThread())
.subscribeLatestCache({ view, pair -> view.onNextLibraryUpdate(pair.first, pair.second) })
}
}
private fun applyFilters(map: Map<Int, List<Manga>>): Map<Int, List<Manga>> {
return map.mapValues { entry -> entry.value
.filter { filterManga(it) }
.sortedWith(Comparator<Manga> { m1, m2 -> sortManga(m1, m2) })
}
}
/**
@ -103,7 +121,7 @@ class LibraryPresenter : BasePresenter<LibraryFragment>() {
*
* @return an observable of the categories and its manga.
*/
fun getLibraryObservable(): Observable<Pair<List<Category>, Map<Int, List<Manga>>>> {
private fun getLibraryObservable(): Observable<Pair<List<Category>, Map<Int, List<Manga>>>> {
return Observable.combineLatest(getCategoriesObservable(), getLibraryMangasObservable(),
{ dbCategories, libraryManga ->
val categories = if (libraryManga.containsKey(0))
@ -114,7 +132,6 @@ class LibraryPresenter : BasePresenter<LibraryFragment>() {
this.categories = categories
Pair(categories, libraryManga)
})
.observeOn(AndroidSchedulers.mainThread())
}
/**
@ -122,7 +139,7 @@ class LibraryPresenter : BasePresenter<LibraryFragment>() {
*
* @return an observable of the categories.
*/
fun getCategoriesObservable(): Observable<List<Category>> {
private fun getCategoriesObservable(): Observable<List<Category>> {
return db.getCategories().asRxObservable()
}
@ -132,34 +149,16 @@ class LibraryPresenter : BasePresenter<LibraryFragment>() {
* @return an observable containing a map with the category id as key and a list of manga as the
* value.
*/
fun getLibraryMangasObservable(): Observable<Map<Int, List<Manga>>> {
private fun getLibraryMangasObservable(): Observable<Map<Int, List<Manga>>> {
return db.getLibraryMangas().asRxObservable()
.flatMap {
Observable.from(it)
// Filter library by options
.filter { filterManga(it) }
.toSortedList { manga1, manga2 -> sortManga(manga1, manga2) }
.flatMap { Observable.from(it) }
.groupBy { it.category }
.flatMap { group -> group.toList().map { Pair(group.key, it) } }
.toMap({ it.first }, { it.second })
}
.map { list -> list.groupBy { it.category } }
}
/**
* Resubscribes to library if needed.
* Requests the library to be filtered.
*/
fun subscribeLibrary() {
if (isUnsubscribed(GET_LIBRARY)) {
start(GET_LIBRARY)
}
}
/**
* Resubscribes to library.
*/
fun resubscribeLibrary() {
start(GET_LIBRARY)
fun requestLibraryUpdate() {
updateTriggerRelay.call(Unit)
}
/**
@ -238,7 +237,7 @@ class LibraryPresenter : BasePresenter<LibraryFragment>() {
*/
fun onOpenManga() {
// Avoid further db updates for the library when it's not needed
stop(GET_LIBRARY)
librarySubscription?.let { remove(it) }
}
/**
@ -250,10 +249,10 @@ class LibraryPresenter : BasePresenter<LibraryFragment>() {
fun setSelection(manga: Manga, selected: Boolean) {
if (selected) {
selectedMangas.add(manga)
selectionSubject.onNext(LibrarySelectionEvent.Selected(manga))
selectionSubject.call(LibrarySelectionEvent.Selected(manga))
} else {
selectedMangas.remove(manga)
selectionSubject.onNext(LibrarySelectionEvent.Unselected(manga))
selectionSubject.call(LibrarySelectionEvent.Unselected(manga))
}
}
@ -262,7 +261,7 @@ class LibraryPresenter : BasePresenter<LibraryFragment>() {
*/
fun clearSelections() {
selectedMangas.clear()
selectionSubject.onNext(LibrarySelectionEvent.Cleared())
selectionSubject.call(LibrarySelectionEvent.Cleared())
}
/**