Fix some authorization issues

app/src/main/java/org/koitharu/kotatsu/base/ui/BaseActivity.kt

@@ -28,9 +28,8 @@ abstract class BaseActivity<B : ViewBinding> : AppCompatActivity(), OnApplyWindo
 	protected lateinit var binding: B
 		private set
 
-	protected val exceptionResolver by lazy(LazyThreadSafetyMode.NONE) {
-		ExceptionResolver(this, supportFragmentManager)
-	}
+	@Suppress("LeakingThis")
+	protected val exceptionResolver = ExceptionResolver(this)
 
 	private var lastInsets: Insets = Insets.NONE
 

app/src/main/java/org/koitharu/kotatsu/base/ui/BaseFragment.kt

@@ -20,9 +20,8 @@ abstract class BaseFragment<B : ViewBinding> : Fragment(), OnApplyWindowInsetsLi
 	protected val binding: B
 		get() = checkNotNull(viewBinding)
 
-	protected val exceptionResolver by lazy(LazyThreadSafetyMode.NONE) {
-		ExceptionResolver(viewLifecycleOwner, childFragmentManager)
-	}
+	@Suppress("LeakingThis")
+	protected val exceptionResolver = ExceptionResolver(this)
 
 	private var lastInsets: Insets = Insets.NONE
 

app/src/main/java/org/koitharu/kotatsu/core/exceptions/AuthRequiredException.kt

@@ -3,9 +3,10 @@ package org.koitharu.kotatsu.core.exceptions
 import androidx.annotation.StringRes
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.exceptions.resolve.ResolvableException
+import org.koitharu.kotatsu.core.model.MangaSource
 
 class AuthRequiredException(
-	val url: String
+	val source: MangaSource,
 ) : RuntimeException("Authorization required"), ResolvableException {
 
 	@StringRes

app/src/main/java/org/koitharu/kotatsu/core/exceptions/resolve/ExceptionResolver.kt

@@ -1,40 +1,71 @@
 package org.koitharu.kotatsu.core.exceptions.resolve
 
 import android.util.ArrayMap
-import androidx.fragment.app.FragmentManager
-import androidx.lifecycle.LifecycleOwner
+import androidx.activity.result.ActivityResultCallback
+import androidx.activity.result.ActivityResultLauncher
+import androidx.fragment.app.Fragment
+import androidx.fragment.app.FragmentActivity
 import kotlinx.coroutines.suspendCancellableCoroutine
 import org.koitharu.kotatsu.browser.cloudflare.CloudFlareDialog
 import org.koitharu.kotatsu.core.exceptions.AuthRequiredException
 import org.koitharu.kotatsu.core.exceptions.CloudFlareProtectedException
+import org.koitharu.kotatsu.core.model.MangaSource
+import org.koitharu.kotatsu.settings.sources.auth.SourceAuthActivity
+import org.koitharu.kotatsu.utils.TaggedActivityResult
+import org.koitharu.kotatsu.utils.isSuccess
 import kotlin.coroutines.Continuation
 import kotlin.coroutines.resume
+import kotlin.coroutines.suspendCoroutine
 
-class ExceptionResolver(
-	private val lifecycleOwner: LifecycleOwner,
-	private val fm: FragmentManager
-) {
+class ExceptionResolver private constructor(
+	private val activity: FragmentActivity?,
+	private val fragment: Fragment?,
+): ActivityResultCallback<TaggedActivityResult> {
 
 	private val continuations = ArrayMap<String, Continuation<Boolean>>(1)
+	private lateinit var sourceAuthContract: ActivityResultLauncher<MangaSource>
+
+	constructor(activity: FragmentActivity) : this(activity = activity, fragment = null) {
+		sourceAuthContract = activity.registerForActivityResult(SourceAuthActivity.Contract(), this)
+	}
+
+	constructor(fragment: Fragment) : this(activity = null, fragment = fragment) {
+		sourceAuthContract = fragment.registerForActivityResult(SourceAuthActivity.Contract(), this)
+	}
+
+	override fun onActivityResult(result: TaggedActivityResult?) {
+		result ?: return
+		continuations.remove(result.tag)?.resume(result.isSuccess)
+	}
 
 	suspend fun resolve(e: ResolvableException): Boolean = when (e) {
 		is CloudFlareProtectedException -> resolveCF(e.url)
-		is AuthRequiredException -> false //TODO
+		is AuthRequiredException -> resolveAuthException(e.source)
 		else -> false
 	}
 
-	private suspend fun resolveCF(url: String) = suspendCancellableCoroutine<Boolean> { cont ->
+	private suspend fun resolveCF(url: String): Boolean {
 		val dialog = CloudFlareDialog.newInstance(url)
-		fm.clearFragmentResult(CloudFlareDialog.TAG)
-		continuations[CloudFlareDialog.TAG] = cont
-		fm.setFragmentResultListener(CloudFlareDialog.TAG, lifecycleOwner) { key, result ->
-			continuations.remove(key)?.resume(result.getBoolean(CloudFlareDialog.EXTRA_RESULT))
-		}
-		dialog.show(fm, CloudFlareDialog.TAG)
-		cont.invokeOnCancellation {
-			continuations.remove(CloudFlareDialog.TAG, cont)
-			fm.clearFragmentResultListener(CloudFlareDialog.TAG)
-			dialog.dismiss()
+		val fm = getFragmentManager()
+		return suspendCancellableCoroutine { cont ->
+			fm.clearFragmentResult(CloudFlareDialog.TAG)
+			continuations[CloudFlareDialog.TAG] = cont
+			fm.setFragmentResultListener(CloudFlareDialog.TAG, checkNotNull(fragment ?: activity)) { key, result ->
+				continuations.remove(key)?.resume(result.getBoolean(CloudFlareDialog.EXTRA_RESULT))
+			}
+			dialog.show(fm, CloudFlareDialog.TAG)
+			cont.invokeOnCancellation {
+				continuations.remove(CloudFlareDialog.TAG, cont)
+				fm.clearFragmentResultListener(CloudFlareDialog.TAG)
+				dialog.dismiss()
+			}
 		}
 	}
+
+	private suspend fun resolveAuthException(source: MangaSource): Boolean = suspendCoroutine { cont ->
+		continuations[SourceAuthActivity.TAG] = cont
+		sourceAuthContract.launch(source)
+	}
+
+	private fun getFragmentManager() = checkNotNull(fragment?.childFragmentManager ?: activity?.supportFragmentManager)
 }

app/src/main/java/org/koitharu/kotatsu/core/parser/MangaRepositoryAuthProvider.kt

@@ -5,4 +5,6 @@ interface MangaRepositoryAuthProvider {
 	val authUrl: String
 
 	fun isAuthorized(): Boolean
+
+	suspend fun getUsername(): String
 }

app/src/main/java/org/koitharu/kotatsu/core/parser/site/ChanRepository.kt

@@ -61,7 +61,7 @@ abstract class ChanRepository(loaderContext: MangaLoaderContext) : RemoteMangaRe
 				tags = runCatching {
 					row.selectFirst("div.genre")?.select("a")?.mapToSet {
 						MangaTag(
-							title = it.text().toTitleCase(),
+							title = it.text().toTagName(),
 							key = it.attr("href").substringAfterLast('/').urlEncoded(),
 							source = source
 						)
@@ -136,7 +136,7 @@ abstract class ChanRepository(loaderContext: MangaLoaderContext) : RemoteMangaRe
 		return root.select("li.sidetag").mapToSet { li ->
 			val a = li.children().last() ?: throw ParseException("a is null")
 			MangaTag(
-				title = a.text().toTitleCase(),
+				title = a.text().toTagName(),
 				key = a.attr("href").substringAfterLast('/'),
 				source = source
 			)
@@ -159,4 +159,5 @@ abstract class ChanRepository(loaderContext: MangaLoaderContext) : RemoteMangaRe
 			else -> "favdesc"
 		}
 
+	private fun String.toTagName() = replace('_', ' ').toTitleCase()
 }

app/src/main/java/org/koitharu/kotatsu/core/parser/site/ExHentaiRepository.kt

@@ -2,10 +2,13 @@ package org.koitharu.kotatsu.core.parser.site
 
 import org.jsoup.nodes.Element
 import org.koitharu.kotatsu.base.domain.MangaLoaderContext
+import org.koitharu.kotatsu.core.exceptions.AuthRequiredException
+import org.koitharu.kotatsu.core.exceptions.ParseException
 import org.koitharu.kotatsu.core.model.*
 import org.koitharu.kotatsu.core.parser.MangaRepositoryAuthProvider
 import org.koitharu.kotatsu.core.parser.RemoteMangaRepository
 import org.koitharu.kotatsu.utils.ext.*
+import java.util.*
 import kotlin.math.pow
 
 private const val DOMAIN_UNAUTHORIZED = "e-hentai.org"
@@ -17,7 +20,9 @@ class ExHentaiRepository(
 
 	override val source = MangaSource.EXHENTAI
 
-	override val sortOrders: Set<SortOrder> = emptySet()
+	override val sortOrders: Set<SortOrder> = EnumSet.of(
+		SortOrder.NEWEST,
+	)
 
 	override val defaultDomain: String
 		get() = if (isAuthorized()) DOMAIN_AUTHORIZED else DOMAIN_UNAUTHORIZED
@@ -206,6 +211,20 @@ class ExHentaiRepository(
 		return false
 	}
 
+	override suspend fun getUsername(): String {
+		val doc = loaderContext.httpGet("https://forums.${DOMAIN_UNAUTHORIZED}/").parseHtml().body()
+		val username = doc.getElementById("userlinks")
+			?.getElementsByAttributeValueContaining("href", "?showuser=")
+			?.firstOrNull()
+			?.ownText()
+			?: if (doc.getElementById("userlinksguest") != null) {
+				throw AuthRequiredException(source)
+			} else {
+				throw ParseException()
+			}
+		return username
+	}
+
 	private fun isAuthorized(domain: String): Boolean {
 		val cookies = loaderContext.cookieJar.getCookies(domain).mapToSet { x -> x.name }
 		return authCookies.all { it in cookies }

app/src/main/java/org/koitharu/kotatsu/core/parser/site/MangaLibRepository.kt

@@ -7,18 +7,22 @@ import org.koitharu.kotatsu.base.domain.MangaLoaderContext
 import org.koitharu.kotatsu.core.exceptions.AuthRequiredException
 import org.koitharu.kotatsu.core.exceptions.ParseException
 import org.koitharu.kotatsu.core.model.*
+import org.koitharu.kotatsu.core.parser.MangaRepositoryAuthProvider
 import org.koitharu.kotatsu.core.parser.RemoteMangaRepository
 import org.koitharu.kotatsu.utils.ext.*
 import java.text.SimpleDateFormat
 import java.util.*
 
 open class MangaLibRepository(loaderContext: MangaLoaderContext) :
-	RemoteMangaRepository(loaderContext) {
+	RemoteMangaRepository(loaderContext), MangaRepositoryAuthProvider {
 
 	override val defaultDomain = "mangalib.me"
 
 	override val source = MangaSource.MANGALIB
 
+	override val authUrl: String
+		get() = "https://${getDomain()}/login"
+
 	override val sortOrders: Set<SortOrder> = EnumSet.of(
 		SortOrder.RATING,
 		SortOrder.ALPHABETICAL,
@@ -153,7 +157,7 @@ open class MangaLibRepository(loaderContext: MangaLoaderContext) :
 		val fullUrl = chapter.url.withDomain()
 		val doc = loaderContext.httpGet(fullUrl).parseHtml()
 		if (doc.location().endsWith("/register")) {
-			throw AuthRequiredException("/login".inContextOf(doc))
+			throw AuthRequiredException(source)
 		}
 		val scripts = doc.head().select("script")
 		val pg = (doc.body().getElementById("pg")?.html() ?: parseFailed("Element #pg not found"))
@@ -212,6 +216,14 @@ open class MangaLibRepository(loaderContext: MangaLoaderContext) :
 		throw ParseException("Script with genres not found")
 	}
 
+	override fun isAuthorized(): Boolean {
+		return false
+	}
+
+	override suspend fun getUsername(): String {
+		TODO("Not yet implemented")
+	}
+
 	private fun getSortKey(sortOrder: SortOrder?) = when (sortOrder) {
 		SortOrder.RATING -> "desc&sort=rate"
 		SortOrder.ALPHABETICAL -> "asc&sort=name"

app/src/main/java/org/koitharu/kotatsu/core/parser/site/NudeMoonRepository.kt

@@ -170,7 +170,7 @@ class NudeMoonRepository(loaderContext: MangaLoaderContext) : RemoteMangaReposit
 		}
 	}
 
-	suspend fun getUsername(): String {
+	override suspend fun getUsername(): String {
 		val body = loaderContext.httpGet("https://${getDomain()}/").parseHtml()
 			.body()
 		return body
@@ -180,7 +180,7 @@ class NudeMoonRepository(loaderContext: MangaLoaderContext) : RemoteMangaReposit
 			?.substringAfterLast('/')
 			?: run {
 				throw if (body.selectFirst("form[name=\"loginform\"]") != null) {
-					AuthRequiredException(authUrl)
+					AuthRequiredException(source)
 				} else {
 					ParseException("Cannot find username")
 				}

app/src/main/java/org/koitharu/kotatsu/core/parser/site/RemangaRepository.kt

@@ -1,5 +1,6 @@
 package org.koitharu.kotatsu.core.parser.site
 
+import okhttp3.Headers
 import org.json.JSONArray
 import org.json.JSONException
 import org.json.JSONObject
@@ -9,6 +10,7 @@ import org.koitharu.kotatsu.core.model.*
 import org.koitharu.kotatsu.core.parser.MangaRepositoryAuthProvider
 import org.koitharu.kotatsu.core.parser.RemoteMangaRepository
 import org.koitharu.kotatsu.utils.ext.*
+import java.net.URLDecoder
 import java.text.DateFormat
 import java.text.SimpleDateFormat
 import java.util.*
@@ -62,7 +64,7 @@ class RemangaRepository(loaderContext: MangaLoaderContext) : RemoteMangaReposito
 			.append((offset / PAGE_SIZE) + 1)
 			.append("&count=")
 			.append(PAGE_SIZE)
-		val content = loaderContext.httpGet(urlBuilder.toString()).parseJson()
+		val content = loaderContext.httpGet(urlBuilder.toString(), getApiHeaders()).parseJson()
 			.getJSONArray("content")
 		return content.map { jo ->
 			val url = "/manga/${jo.getString("dir")}"
@@ -95,7 +97,8 @@ class RemangaRepository(loaderContext: MangaLoaderContext) : RemoteMangaReposito
 		val slug = manga.url.find(regexLastUrlPath)
 			?: throw ParseException("Cannot obtain slug from ${manga.url}")
 		val data = loaderContext.httpGet(
-			url = "https://api.$domain/api/titles/$slug/"
+			url = "https://api.$domain/api/titles/$slug/",
+			headers = getApiHeaders(),
 		).parseJson()
 		val content = try {
 			data.getJSONObject("content")
@@ -150,7 +153,7 @@ class RemangaRepository(loaderContext: MangaLoaderContext) : RemoteMangaReposito
 
 	override suspend fun getPages(chapter: MangaChapter): List<MangaPage> {
 		val referer = "https://${getDomain()}/"
-		val content = loaderContext.httpGet(chapter.url.withDomain(subdomain = "api")).parseJson()
+		val content = loaderContext.httpGet(chapter.url.withDomain(subdomain = "api"), getApiHeaders()).parseJson()
 			.getJSONObject("content")
 		val pages = content.optJSONArray("pages")
 		if (pages == null) {
@@ -177,7 +180,7 @@ class RemangaRepository(loaderContext: MangaLoaderContext) : RemoteMangaReposito
 
 	override suspend fun getTags(): Set<MangaTag> {
 		val domain = getDomain()
-		val content = loaderContext.httpGet("https://api.$domain/api/forms/titles/?get=genres")
+		val content = loaderContext.httpGet("https://api.$domain/api/forms/titles/?get=genres", getApiHeaders())
 			.parseJson().getJSONObject("content").getJSONArray("genres")
 		return content.mapToSet { jo ->
 			MangaTag(
@@ -194,6 +197,23 @@ class RemangaRepository(loaderContext: MangaLoaderContext) : RemoteMangaReposito
 		}
 	}
 
+	override suspend fun getUsername(): String {
+		val jo = loaderContext.httpGet(
+			url = "https://api.${getDomain()}/api/users/current/",
+			headers = getApiHeaders(),
+		).parseJson()
+		return jo.getJSONObject("content").getString("username")
+	}
+
+	private fun getApiHeaders(): Headers? {
+		val userCookie = loaderContext.cookieJar.getCookies(getDomain()).find {
+			it.name == "user"
+		} ?: return null
+		val jo = JSONObject(URLDecoder.decode(userCookie.value, Charsets.UTF_8.name()))
+		val accessToken = jo.getStringOrNull("access_token") ?: return null
+		return Headers.headersOf("authorization", "bearer $accessToken")
+	}
+
 	private fun copyCookies() {
 		val domain = getDomain()
 		loaderContext.cookieJar.copyCookies(domain, "api.$domain")
@@ -220,7 +240,8 @@ class RemangaRepository(loaderContext: MangaLoaderContext) : RemoteMangaReposito
 		var page = 1
 		while (true) {
 			val content = loaderContext.httpGet(
-				"https://api.$domain/api/titles/chapters/?branch_id=$branchId&page=$page&count=100"
+				url = "https://api.$domain/api/titles/chapters/?branch_id=$branchId&page=$page&count=100",
+				headers = getApiHeaders(),
 			).parseJson().getJSONArray("content")
 			val len = content.length()
 			if (len == 0) {

app/src/main/java/org/koitharu/kotatsu/reader/ui/ReaderActivity.kt

@@ -2,6 +2,7 @@ package org.koitharu.kotatsu.reader.ui
 
 import android.Manifest
 import android.content.Context
+import android.content.DialogInterface
 import android.content.Intent
 import android.content.pm.PackageManager
 import android.net.Uri
@@ -35,6 +36,7 @@ import org.koitharu.kotatsu.BuildConfig
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.base.domain.MangaIntent
 import org.koitharu.kotatsu.base.ui.BaseFullscreenActivity
+import org.koitharu.kotatsu.core.exceptions.resolve.ResolvableException
 import org.koitharu.kotatsu.core.model.Manga
 import org.koitharu.kotatsu.core.model.MangaChapter
 import org.koitharu.kotatsu.core.model.MangaPage
@@ -216,14 +218,14 @@ class ReaderActivity : BaseFullscreenActivity<ActivityReaderBinding>(),
 	}
 
 	private fun onError(e: Throwable) {
+		val listener = ErrorDialogListener(e)
 		val dialog = MaterialAlertDialogBuilder(this)
 			.setTitle(R.string.error_occurred)
 			.setMessage(e.getDisplayMessage(resources))
-			.setPositiveButton(R.string.close, null)
-		if (viewModel.content.value?.pages.isNullOrEmpty()) {
-			dialog.setOnDismissListener {
-				finish()
-			}
+			.setNegativeButton(R.string.close, listener)
+			.setOnCancelListener(listener)
+		if (e is ResolvableException) {
+			dialog.setPositiveButton(e.resolveTextId, listener)
 		}
 		dialog.show()
 	}
@@ -369,6 +371,36 @@ class ReaderActivity : BaseFullscreenActivity<ActivityReaderBinding>(),
 		}
 	}
 
+	private inner class ErrorDialogListener(
+		private val exception: Throwable,
+	) : DialogInterface.OnClickListener, DialogInterface.OnCancelListener {
+
+		override fun onClick(dialog: DialogInterface?, which: Int) {
+			if (which == DialogInterface.BUTTON_POSITIVE && exception is ResolvableException) {
+				dialog?.dismiss()
+				tryResolve(exception)
+			} else {
+				onCancel(dialog)
+			}
+		}
+
+		override fun onCancel(dialog: DialogInterface?) {
+			if (viewModel.content.value?.pages.isNullOrEmpty()) {
+				finishAfterTransition()
+			}
+		}
+
+		private fun tryResolve(e: ResolvableException) {
+			lifecycleScope.launch {
+				if (exceptionResolver.resolve(e)) {
+					viewModel.reload()
+				} else {
+					onCancel(null)
+				}
+			}
+		}
+	}
+
 	companion object {
 
 		const val ACTION_MANGA_READ = "${BuildConfig.APPLICATION_ID}.action.READ_MANGA"

app/src/main/java/org/koitharu/kotatsu/reader/ui/ReaderViewModel.kt

@@ -32,8 +32,8 @@ import org.koitharu.kotatsu.utils.ext.asLiveDataDistinct
 import org.koitharu.kotatsu.utils.ext.processLifecycleScope
 
 class ReaderViewModel(
-	intent: MangaIntent,
-	state: ReaderState?,
+	private val intent: MangaIntent,
+	initialState: ReaderState?,
 	private val dataRepository: MangaDataRepository,
 	private val historyRepository: HistoryRepository,
 	private val shortcutsRepository: ShortcutsRepository,
@@ -42,7 +42,7 @@ class ReaderViewModel(
 ) : BaseViewModel() {
 
 	private var loadingJob: Job? = null
-	private val currentState = MutableStateFlow<ReaderState?>(null)
+	private val currentState = MutableStateFlow(initialState)
 	private val mangaData = MutableStateFlow(intent.manga)
 	private val chapters = LongSparseArray<MangaChapter>()
 
@@ -87,45 +87,7 @@ class ReaderViewModel(
 	val onZoomChanged = SingleLiveEvent<Unit>()
 
 	init {
-		loadingJob = launchLoadingJob(Dispatchers.Default) {
-			var manga = dataRepository.resolveIntent(intent)
-				?: throw MangaNotFoundException("Cannot find manga")
-			mangaData.value = manga
-			val repo = MangaRepository(manga.source)
-			manga = repo.getDetails(manga)
-			manga.chapters?.forEach {
-				chapters.put(it.id, it)
-			}
-			// determine mode
-			val mode =
-				dataRepository.getReaderMode(manga.id) ?: manga.chapters?.randomOrNull()?.let {
-					val pages = repo.getPages(it)
-					val isWebtoon = MangaUtils.determineMangaIsWebtoon(pages)
-					val newMode = getReaderMode(isWebtoon)
-					if (isWebtoon != null) {
-						dataRepository.savePreferences(manga, newMode)
-					}
-					newMode
-				} ?: error("There are no chapters in this manga")
-			// obtain state
-			currentState.value = state ?: historyRepository.getOne(manga)?.let {
-				ReaderState.from(it)
-			} ?: ReaderState.initial(manga)
-
-			val branch = chapters[currentState.value?.chapterId ?: 0L].branch
-			mangaData.value = manga.copy(chapters = manga.chapters?.filter { it.branch == branch })
-			readerMode.postValue(mode)
-
-			val pages = loadChapter(requireNotNull(currentState.value).chapterId)
-			// save state
-			currentState.value?.let {
-				historyRepository.addOrUpdate(manga, it.chapterId, it.page, it.scroll)
-				shortcutsRepository.updateShortcuts()
-			}
-
-			content.postValue(ReaderContent(pages, currentState.value))
-		}
-
+		loadImpl()
 		subscribeToSettings()
 	}
 
@@ -134,6 +96,11 @@ class ReaderViewModel(
 		super.onCleared()
 	}
 
+	fun reload() {
+		loadingJob?.cancel()
+		loadImpl()
+	}
+
 	fun switchMode(newMode: ReaderMode) {
 		launchJob {
 			val manga = checkNotNull(mangaData.value)
@@ -219,6 +186,49 @@ class ReaderViewModel(
 		}
 	}
 
+	private fun loadImpl() {
+		loadingJob = launchLoadingJob(Dispatchers.Default) {
+			var manga = dataRepository.resolveIntent(intent)
+				?: throw MangaNotFoundException("Cannot find manga")
+			mangaData.value = manga
+			val repo = MangaRepository(manga.source)
+			manga = repo.getDetails(manga)
+			manga.chapters?.forEach {
+				chapters.put(it.id, it)
+			}
+			// determine mode
+			val mode =
+				dataRepository.getReaderMode(manga.id) ?: manga.chapters?.randomOrNull()?.let {
+					val pages = repo.getPages(it)
+					val isWebtoon = MangaUtils.determineMangaIsWebtoon(pages)
+					val newMode = getReaderMode(isWebtoon)
+					if (isWebtoon != null) {
+						dataRepository.savePreferences(manga, newMode)
+					}
+					newMode
+				} ?: error("There are no chapters in this manga")
+			// obtain state
+			if (currentState.value == null) {
+				currentState.value = historyRepository.getOne(manga)?.let {
+					ReaderState.from(it)
+				} ?: ReaderState.initial(manga)
+			}
+
+			val branch = chapters[currentState.value?.chapterId ?: 0L].branch
+			mangaData.value = manga.copy(chapters = manga.chapters?.filter { it.branch == branch })
+			readerMode.postValue(mode)
+
+			val pages = loadChapter(requireNotNull(currentState.value).chapterId)
+			// save state
+			currentState.value?.let {
+				historyRepository.addOrUpdate(manga, it.chapterId, it.page, it.scroll)
+				shortcutsRepository.updateShortcuts()
+			}
+
+			content.postValue(ReaderContent(pages, currentState.value))
+		}
+	}
+
 	private fun getReaderMode(isWebtoon: Boolean?) = when {
 		isWebtoon == true -> ReaderMode.WEBTOON
 		settings.isPreferRtlReader -> ReaderMode.REVERSED

app/src/main/java/org/koitharu/kotatsu/settings/SourceSettingsFragment.kt

@@ -2,12 +2,18 @@ package org.koitharu.kotatsu.settings
 
 import android.os.Bundle
 import android.util.ArrayMap
+import android.view.View
 import android.view.inputmethod.EditorInfo
 import androidx.preference.EditTextPreference
 import androidx.preference.Preference
 import androidx.preference.PreferenceFragmentCompat
 import androidx.preference.TwoStatePreference
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+import org.koitharu.kotatsu.BuildConfig
 import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.core.exceptions.AuthRequiredException
 import org.koitharu.kotatsu.core.model.MangaSource
 import org.koitharu.kotatsu.core.parser.MangaRepositoryAuthProvider
 import org.koitharu.kotatsu.core.parser.RemoteMangaRepository
@@ -17,6 +23,7 @@ import org.koitharu.kotatsu.settings.utils.EditTextBindListener
 import org.koitharu.kotatsu.settings.utils.EditTextDefaultSummaryProvider
 import org.koitharu.kotatsu.utils.ext.mangaRepositoryOf
 import org.koitharu.kotatsu.utils.ext.parcelableArgument
+import org.koitharu.kotatsu.utils.ext.viewLifecycleScope
 import org.koitharu.kotatsu.utils.ext.withArgs
 
 class SourceSettingsFragment : PreferenceFragmentCompat() {
@@ -51,6 +58,15 @@ class SourceSettingsFragment : PreferenceFragmentCompat() {
 		}
 	}
 
+	override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+		super.onViewCreated(view, savedInstanceState)
+		findPreference<Preference>(SourceSettings.KEY_AUTH)?.run {
+			if (isVisible) {
+				loadUsername(this)
+			}
+		}
+	}
+
 	override fun onPreferenceTreeClick(preference: Preference): Boolean {
 		return when (preference.key) {
 			SourceSettings.KEY_AUTH -> {
@@ -87,6 +103,21 @@ class SourceSettingsFragment : PreferenceFragmentCompat() {
 		}
 	}
 
+	private fun loadUsername(preference: Preference) = viewLifecycleScope.launch {
+		runCatching {
+			withContext(Dispatchers.Default) {
+				(repository as MangaRepositoryAuthProvider).getUsername()
+			}
+		}.onSuccess { username ->
+			preference.title = getString(R.string.logged_in_as, username)
+		}.onFailure { error ->
+			preference.isEnabled = error is AuthRequiredException
+			if (BuildConfig.DEBUG) {
+				error.printStackTrace()
+			}
+		}
+	}
+
 	companion object {
 
 		private const val EXTRA_SOURCE = "source"

app/src/main/java/org/koitharu/kotatsu/settings/sources/auth/SourceAuthActivity.kt

@@ -1,12 +1,14 @@
 package org.koitharu.kotatsu.settings.sources.auth
 
 import android.annotation.SuppressLint
+import android.app.Activity
 import android.content.Context
 import android.content.Intent
 import android.os.Bundle
 import android.os.Parcelable
 import android.view.MenuItem
 import android.widget.Toast
+import androidx.activity.result.contract.ActivityResultContract
 import androidx.core.graphics.Insets
 import androidx.core.view.isVisible
 import androidx.core.view.updatePadding
@@ -17,6 +19,7 @@ import org.koitharu.kotatsu.browser.BrowserClient
 import org.koitharu.kotatsu.core.model.MangaSource
 import org.koitharu.kotatsu.core.parser.MangaRepositoryAuthProvider
 import org.koitharu.kotatsu.databinding.ActivityBrowserBinding
+import org.koitharu.kotatsu.utils.TaggedActivityResult
 import org.koitharu.kotatsu.utils.ext.mangaRepositoryOf
 import com.google.android.material.R as materialR
 
@@ -61,6 +64,7 @@ class SourceAuthActivity : BaseActivity<ActivityBrowserBinding>(), BrowserCallba
 	override fun onOptionsItemSelected(item: MenuItem): Boolean = when (item.itemId) {
 		android.R.id.home -> {
 			binding.webView.stopLoading()
+			setResult(Activity.RESULT_CANCELED)
 			finishAfterTransition()
 			true
 		}
@@ -89,6 +93,7 @@ class SourceAuthActivity : BaseActivity<ActivityBrowserBinding>(), BrowserCallba
 		binding.progressBar.isVisible = isLoading
 		if (!isLoading && repository.isAuthorized()) {
 			Toast.makeText(this, R.string.auth_complete, Toast.LENGTH_SHORT).show()
+			setResult(Activity.RESULT_OK)
 			finishAfterTransition()
 		}
 	}
@@ -103,9 +108,20 @@ class SourceAuthActivity : BaseActivity<ActivityBrowserBinding>(), BrowserCallba
 		binding.webView.updatePadding(bottom = insets.bottom)
 	}
 
+	class Contract : ActivityResultContract<MangaSource, TaggedActivityResult>() {
+		override fun createIntent(context: Context, input: MangaSource): Intent {
+			return newIntent(context, input)
+		}
+
+		override fun parseResult(resultCode: Int, intent: Intent?): TaggedActivityResult {
+			return TaggedActivityResult(TAG, resultCode)
+		}
+	}
+
 	companion object {
 
 		private const val EXTRA_SOURCE = "source"
+		const val TAG = "SourceAuthActivity"
 
 		fun newIntent(context: Context, source: MangaSource): Intent {
 			return Intent(context, SourceAuthActivity::class.java)

app/src/main/java/org/koitharu/kotatsu/utils/TaggedActivityResult.kt

@@ -0,0 +1,11 @@
+package org.koitharu.kotatsu.utils
+
+import android.app.Activity
+
+class TaggedActivityResult(
+	val tag: String,
+	val result: Int,
+)
+
+val TaggedActivityResult.isSuccess: Boolean
+	get() = this.result == Activity.RESULT_OK

app/src/main/res/values/strings.xml

@@ -265,4 +265,5 @@
 	<string name="only_using_wifi">Only using WiFi</string>
 	<string name="always">Always</string>
 	<string name="preload_pages">Preload pages</string>
+	<string name="logged_in_as">Logged in as %s</string>
 </resources>