Remember last opened section

app/src/main/java/org/koitharu/kotatsu/core/prefs/AppSection.kt

@@ -0,0 +1,6 @@
+package org.koitharu.kotatsu.core.prefs
+
+enum class AppSection {
+
+	LOCAL, FAVOURITES, HISTORY;
+}

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

@@ -3,7 +3,6 @@ package org.koitharu.kotatsu.core.prefs
 import android.content.Context
 import android.content.SharedPreferences
 import android.content.res.Resources
-import android.os.StatFs
 import android.provider.Settings
 import androidx.appcompat.app.AppCompatDelegate
 import androidx.core.content.edit
@@ -27,6 +26,12 @@ class AppSettings private constructor(resources: Resources, private val prefs: S
 		ListMode.DETAILED_LIST
 	)
 
+	var defaultSection by EnumPreferenceDelegate(
+		AppSection::class.java,
+		resources.getString(R.string.key_app_section),
+		AppSection.HISTORY
+	)
+
 	val theme by StringIntPreferenceDelegate(
 		resources.getString(R.string.key_theme),
 		AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM

app/src/main/java/org/koitharu/kotatsu/core/prefs/ListMode.kt

@@ -1,13 +1,6 @@
 package org.koitharu.kotatsu.core.prefs
 
-enum class ListMode(val id: Int) {
+enum class ListMode {
 
-	LIST(0),
-	DETAILED_LIST(1),
-	GRID(2);
-
-	companion object {
-
-		fun valueOf(id: Int) = values().firstOrNull { it.id == id }
-	}
+	LIST, DETAILED_LIST, GRID;
 }

app/src/main/java/org/koitharu/kotatsu/ui/main/MainActivity.kt

@@ -21,6 +21,7 @@ import moxy.ktx.moxyPresenter
 import org.koin.core.inject
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.model.MangaSource
+import org.koitharu.kotatsu.core.prefs.AppSection
 import org.koitharu.kotatsu.core.prefs.AppSettings
 import org.koitharu.kotatsu.domain.MangaProviderFactory
 import org.koitharu.kotatsu.ui.common.BaseActivity
@@ -65,8 +66,7 @@ class MainActivity : BaseActivity(), NavigationView.OnNavigationItemSelectedList
 		supportFragmentManager.findFragmentById(R.id.container)?.let {
 			fab.isVisible = it is HistoryListFragment
 		} ?: run {
-			navigationView.setCheckedItem(R.id.nav_history)
-			setPrimaryFragment(HistoryListFragment.newInstance())
+			openDefaultSection()
 		}
 		drawer.postDelayed(2000) {
 			AppUpdateService.startIfRequired(applicationContext)
@@ -106,9 +106,18 @@ class MainActivity : BaseActivity(), NavigationView.OnNavigationItemSelectedList
 			val source = MangaSource.values().getOrNull(item.itemId) ?: return false
 			setPrimaryFragment(RemoteListFragment.newInstance(source))
 		} else when (item.itemId) {
-			R.id.nav_history -> setPrimaryFragment(HistoryListFragment.newInstance())
-			R.id.nav_favourites -> setPrimaryFragment(FavouritesContainerFragment.newInstance())
-			R.id.nav_local_storage -> setPrimaryFragment(LocalListFragment.newInstance())
+			R.id.nav_history -> {
+				settings.defaultSection = AppSection.HISTORY
+				setPrimaryFragment(HistoryListFragment.newInstance())
+			}
+			R.id.nav_favourites -> {
+				settings.defaultSection = AppSection.FAVOURITES
+				setPrimaryFragment(FavouritesContainerFragment.newInstance())
+			}
+			R.id.nav_local_storage -> {
+				settings.defaultSection = AppSection.LOCAL
+				setPrimaryFragment(LocalListFragment.newInstance())
+			}
 			R.id.nav_action_settings -> {
 				startActivity(SettingsActivity.newIntent(this))
 				return true
@@ -167,6 +176,23 @@ class MainActivity : BaseActivity(), NavigationView.OnNavigationItemSelectedList
 		}
 	}
 
+	private fun openDefaultSection() {
+		when(settings.defaultSection) {
+			AppSection.LOCAL -> {
+				navigationView.setCheckedItem(R.id.nav_local_storage)
+				setPrimaryFragment(LocalListFragment.newInstance())
+			}
+			AppSection.FAVOURITES -> {
+				navigationView.setCheckedItem(R.id.nav_favourites)
+				setPrimaryFragment(FavouritesContainerFragment.newInstance())
+			}
+			AppSection.HISTORY -> {
+				navigationView.setCheckedItem(R.id.nav_history)
+				setPrimaryFragment(HistoryListFragment.newInstance())
+			}
+		}
+	}
+
 	private fun setPrimaryFragment(fragment: Fragment) {
 		supportFragmentManager.beginTransaction()
 			.replace(R.id.container, fragment)

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

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
 	<string name="key_list_mode">list_mode</string>
+	<string name="key_app_section">app_section</string>
 	<string name="key_theme">theme</string>
 	<string name="key_sources_order">sources_order</string>
 	<string name="key_sources_hidden">sources_hidden</string>