Option to disable related manga

app/src/main/kotlin/org/koitharu/kotatsu/core/prefs/AppSettings.kt

@@ -280,6 +280,9 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 		get() = prefs.getEnumValue(KEY_HISTORY_ORDER, HistoryOrder.UPDATED)
 		set(value) = prefs.edit { putEnumValue(KEY_HISTORY_ORDER, value) }
 
+	val isRelatedMangaEnabled: Boolean
+		get() = prefs.getBoolean(KEY_RELATED_MANGA, true)
+
 	val isWebtoonZoomEnable: Boolean
 		get() = prefs.getBoolean(KEY_WEBTOON_ZOOM, true)
 
@@ -448,6 +451,7 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 		const val KEY_IMAGES_PROXY = "images_proxy"
 		const val KEY_LOCAL_MANGA_DIRS = "local_manga_dirs"
 		const val KEY_DISABLE_NSFW = "no_nsfw"
+		const val KEY_RELATED_MANGA = "related_manga"
 
 		// About
 		const val KEY_APP_UPDATE = "app_update"

app/src/main/kotlin/org/koitharu/kotatsu/details/ui/DetailsViewModel.kt

@@ -167,7 +167,7 @@ class DetailsViewModel @Inject constructor(
 		it?.remote
 	}.distinctUntilChangedBy { it?.id }
 		.mapLatest {
-			if (it != null) {
+			if (it != null && settings.isRelatedMangaEnabled) {
 				relatedMangaUseCase.invoke(it)?.toUi(ListMode.GRID, extraProvider).orEmpty()
 			} else {
 				emptyList()

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

@@ -474,4 +474,5 @@
 	<string name="in_progress">In progress</string>
 	<string name="disable_nsfw">Disable NSFW</string>
 	<string name="too_many_requests_message">Too many requests. Try again later</string>
+	<string name="related_manga_summary">Show a list of related manga. In some cases it may be inaccurate or missing</string>
 </resources>

app/src/main/res/xml/pref_services.xml

@@ -19,7 +19,13 @@
 	<PreferenceScreen
 		android:fragment="org.koitharu.kotatsu.settings.SuggestionsSettingsFragment"
 		android:key="suggestions"
-		android:title="@string/suggestions"
+		android:title="@string/suggestions" />
+
+	<SwitchPreferenceCompat
+		android:defaultValue="true"
+		android:key="related_manga"
+		android:summary="@string/related_manga_summary"
+		android:title="@string/related_manga"
 		app:allowDividerAbove="true" />
 
 	<PreferenceCategory android:title="@string/tracking">