Show changelog in settings

app/src/main/kotlin/org/koitharu/kotatsu/core/github/AppUpdateRepository.kt

@@ -93,12 +93,6 @@ class AppUpdateRepository @Inject constructor(
 		return BuildConfig.BUILD_TYPE != BUILD_TYPE_RELEASE || appValidator.isOriginalApp.getOrNull() == true
 	}
 
-	suspend fun getCurrentVersionChangelog(): String? {
-		val currentVersion = VersionId(BuildConfig.VERSION_NAME)
-		val available = getAvailableVersions()
-		return available.find { x -> x.versionId == currentVersion }?.description
-	}
-
 	private inline fun JSONArray.find(predicate: (JSONObject) -> Boolean): JSONObject? {
 		val size = length()
 		for (i in 0 until size) {

app/src/main/kotlin/org/koitharu/kotatsu/settings/about/changelog/ChangelogFragment.kt

@@ -0,0 +1,74 @@
+package org.koitharu.kotatsu.settings.about.changelog
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.core.view.WindowInsetsCompat
+import androidx.fragment.app.viewModels
+import dagger.hilt.android.AndroidEntryPoint
+import io.noties.markwon.Markwon
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.flow.filterNotNull
+import kotlinx.coroutines.flow.flowOn
+import kotlinx.coroutines.flow.map
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.core.exceptions.resolve.DialogErrorObserver
+import org.koitharu.kotatsu.core.ui.BaseFragment
+import org.koitharu.kotatsu.core.util.ext.consumeAll
+import org.koitharu.kotatsu.core.util.ext.container
+import org.koitharu.kotatsu.core.util.ext.end
+import org.koitharu.kotatsu.core.util.ext.observe
+import org.koitharu.kotatsu.core.util.ext.observeEvent
+import org.koitharu.kotatsu.core.util.ext.showOrHide
+import org.koitharu.kotatsu.core.util.ext.start
+import org.koitharu.kotatsu.databinding.FragmentChangelogBinding
+
+@AndroidEntryPoint
+class ChangelogFragment : BaseFragment<FragmentChangelogBinding>() {
+
+	private val viewModel: ChangelogViewModel by viewModels()
+
+	override fun onCreateViewBinding(
+		inflater: LayoutInflater,
+		container: ViewGroup?
+	) = FragmentChangelogBinding.inflate(inflater, container, false)
+
+	override fun onViewBindingCreated(binding: FragmentChangelogBinding, savedInstanceState: Bundle?) {
+		super.onViewBindingCreated(binding, savedInstanceState)
+		val markwon = Markwon.create(binding.root.context)
+		viewModel.isLoading.observe(viewLifecycleOwner) {
+			binding.progressBar.showOrHide(it)
+		}
+		viewModel.onError.observeEvent(viewLifecycleOwner, DialogErrorObserver(binding.root, this))
+		viewModel.changelog.filterNotNull()
+			.map { markwon.toMarkdown(it) }
+			.flowOn(Dispatchers.Default)
+			.observe(viewLifecycleOwner) {
+				markwon.setParsedMarkdown(binding.textViewContent, it)
+			}
+	}
+
+	override fun onResume() {
+		super.onResume()
+		activity?.setTitle(R.string.changelog)
+	}
+
+	override fun onApplyWindowInsets(
+		v: View,
+		insets: WindowInsetsCompat
+	): WindowInsetsCompat {
+		val typeMask = WindowInsetsCompat.Type.systemBars()
+		val barsInsets = insets.getInsets(typeMask)
+		val isTablet = !resources.getBoolean(R.bool.is_tablet)
+		val isMaster = container?.id == R.id.container_master
+		val basePadding = resources.getDimensionPixelOffset(R.dimen.screen_padding)
+		requireViewBinding().textViewContent.setPaddingRelative(
+			basePadding + if (isTablet && !isMaster) 0 else barsInsets.start(v),
+			basePadding,
+			basePadding + if (isTablet && isMaster) 0 else barsInsets.end(v),
+			basePadding + barsInsets.bottom,
+		)
+		return insets.consumeAll(typeMask)
+	}
+}

app/src/main/kotlin/org/koitharu/kotatsu/settings/about/changelog/ChangelogViewModel.kt

@@ -0,0 +1,31 @@
+package org.koitharu.kotatsu.settings.about.changelog
+
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.flow.MutableStateFlow
+import org.jsoup.internal.StringUtil
+import org.koitharu.kotatsu.core.github.AppUpdateRepository
+import org.koitharu.kotatsu.core.ui.BaseViewModel
+import javax.inject.Inject
+
+@HiltViewModel
+class ChangelogViewModel @Inject constructor(
+	private val appUpdateRepository: AppUpdateRepository,
+) : BaseViewModel() {
+
+	val changelog = MutableStateFlow<String?>(null)
+
+	init {
+		launchLoadingJob(Dispatchers.Default) {
+			val versions = appUpdateRepository.getAvailableVersions()
+			val stringJoiner = StringUtil.StringJoiner("\n\n\n")
+			for (version in versions) {
+				stringJoiner.add("# ")
+					.append(version.name)
+					.append("\n\n")
+					.append(version.description)
+			}
+			changelog.value = stringJoiner.complete()
+		}
+	}
+}

app/src/main/res/layout/fragment_changelog.xml

@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.coordinatorlayout.widget.CoordinatorLayout
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto"
+	xmlns:tools="http://schemas.android.com/tools"
+	android:layout_width="match_parent"
+	android:layout_height="match_parent">
+
+	<androidx.core.widget.NestedScrollView
+		android:id="@+id/scrollView"
+		android:layout_width="match_parent"
+		android:layout_height="match_parent">
+
+		<org.koitharu.kotatsu.core.ui.widgets.SelectableTextView
+			android:id="@+id/textView_content"
+			android:layout_width="match_parent"
+			android:layout_height="wrap_content"
+			android:padding="@dimen/screen_padding"
+			android:textAppearance="?textAppearanceBodyMedium"
+			android:textIsSelectable="true"
+			tools:text="@tools:sample/lorem/random" />
+
+	</androidx.core.widget.NestedScrollView>
+
+	<com.google.android.material.progressindicator.LinearProgressIndicator
+		android:id="@+id/progressBar"
+		android:layout_width="wrap_content"
+		android:layout_height="match_parent"
+		android:layout_gravity="top"
+		android:indeterminate="true"
+		app:hideAnimationBehavior="escape" />
+
+</androidx.coordinatorlayout.widget.CoordinatorLayout>

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

@@ -838,4 +838,6 @@
 	<string name="incognito_for_nsfw">Incognito mode for NSFW manga</string>
 	<string name="additional_action_required">Additional action is required</string>
 	<string name="hide_from_main_screen">Hide from main screen</string>
+	<string name="changelog">Changelog</string>
+	<string name="changelog_summary">Changes history for recently released versions</string>
 </resources>

app/src/main/res/xml/pref_about.xml

@@ -15,6 +15,13 @@
 		android:summary="@string/allow_unstable_updates_summary"
 		android:title="@string/allow_unstable_updates" />
 
+	<Preference
+		android:fragment="org.koitharu.kotatsu.settings.about.changelog.ChangelogFragment"
+		android:key="changelog"
+		android:persistent="false"
+		android:summary="@string/changelog_summary"
+		android:title="@string/changelog" />
+
 	<Preference
 		android:key="about_help"
 		android:persistent="false"