Using enum for filter order instead of random string and chars

app/src/main/java/eu/kanade/tachiyomi/data/preference/PreferencesHelper.kt

@@ -11,6 +11,7 @@ import com.f2prateek.rx.preferences.RxSharedPreferences
 import com.tfcporciuncula.flow.FlowSharedPreferences
 import eu.kanade.tachiyomi.R
 import eu.kanade.tachiyomi.data.track.TrackService
+import eu.kanade.tachiyomi.ui.library.filter.FilterBottomSheet
 import eu.kanade.tachiyomi.ui.reader.ReaderActivity
 import eu.kanade.tachiyomi.ui.reader.viewer.ViewerNavigation
 import eu.kanade.tachiyomi.ui.reader.viewer.pager.PageLayout
@@ -340,7 +341,7 @@ class PreferencesHelper(val context: Context) {
 
     fun hopperGravity() = flowPrefs.getInt("hopper_gravity", 1)
 
-    fun filterOrder() = flowPrefs.getString("filter_order", "rudcmt")
+    fun filterOrder() = flowPrefs.getString("filter_order", FilterBottomSheet.Filters.DEFAULT_ORDER)
 
     fun hopperLongPressAction() = flowPrefs.getInt(Keys.hopperLongPress, 0)
 

app/src/main/java/eu/kanade/tachiyomi/ui/library/display/LibraryCategoryView.kt

@@ -12,6 +12,7 @@ import eu.davidea.flexibleadapter.FlexibleAdapter
 import eu.kanade.tachiyomi.R
 import eu.kanade.tachiyomi.databinding.LibraryCategoryLayoutBinding
 import eu.kanade.tachiyomi.ui.library.filter.FilterBottomSheet
+import eu.kanade.tachiyomi.ui.library.filter.FilterBottomSheet.Filters.Companion.DEFAULT_ORDER
 import eu.kanade.tachiyomi.ui.library.filter.ManageFilterItem
 import eu.kanade.tachiyomi.util.bindToPreference
 import eu.kanade.tachiyomi.util.system.toInt
@@ -57,7 +58,7 @@ class LibraryCategoryView @JvmOverloads constructor(context: Context, attrs: Att
                 val recycler = RecyclerView(context)
                 var filterOrder = preferences.filterOrder().get()
                 if (filterOrder.count() != 6) {
-                    filterOrder = "urdcmt"
+                    filterOrder = DEFAULT_ORDER
                 }
                 val adapter = FlexibleAdapter(
                     filterOrder.toCharArray().map(::ManageFilterItem),
@@ -71,7 +72,7 @@ class LibraryCategoryView @JvmOverloads constructor(context: Context, attrs: Att
                 MaterialDialog(context).title(R.string.reorder_filters)
                     .customView(view = recycler, scrollable = false)
                     .negativeButton(android.R.string.cancel)
-                    .positiveButton(android.R.string.ok) {
+                    .positiveButton(R.string.reorder) {
                         val order = adapter.currentItems.map { it.char }.joinToString("")
                         preferences.filterOrder().set(order)
                         recycler.adapter = null

app/src/main/java/eu/kanade/tachiyomi/ui/library/filter/FilterBottomSheet.kt

@@ -6,6 +6,7 @@ import android.util.AttributeSet
 import android.view.View
 import android.widget.ImageView
 import android.widget.LinearLayout
+import androidx.annotation.StringRes
 import com.google.android.material.bottomsheet.BottomSheetBehavior
 import eu.kanade.tachiyomi.R
 import eu.kanade.tachiyomi.data.database.DatabaseHelper
@@ -324,37 +325,19 @@ class FilterBottomSheet @JvmOverloads constructor(context: Context, attrs: Attri
                 }
             }
     }
-    private fun indexOf(filterTagGroup: FilterTagGroup): Int {
-        charOfFilter(filterTagGroup)?.let {
-            return filterOrder.indexOf(it)
-        }
-        return 0
-    }
 
     private fun addForClear(): Int {
         return if (clearButton.parent != null) 1 else 0
     }
 
-    private fun charOfFilter(filterTagGroup: FilterTagGroup): Char? {
-        return when (filterTagGroup) {
-            unreadProgress -> 'u'
-            unread -> 'r'
-            downloaded -> 'd'
-            completed -> 'c'
-            mangaType -> 'm'
-            tracked -> 't'
-            else -> null
-        }
-    }
-
     private fun mapOfFilters(char: Char): FilterTagGroup? {
-        return when (char) {
-            'u' -> unreadProgress
-            'r' -> unread
-            'd' -> downloaded
-            'c' -> completed
-            'm' -> mangaType
-            't' -> if (hasTracking) tracked else null
+        return when (Filters.filterOf(char)) {
+            Filters.UnreadProgress -> unreadProgress
+            Filters.Unread -> unread
+            Filters.Downloaded -> downloaded
+            Filters.Completed -> completed
+            Filters.SeriesType -> mangaType
+            Filters.Tracked -> if (hasTracking) tracked else null
             else -> null
         }
     }
@@ -470,4 +453,28 @@ class FilterBottomSheet @JvmOverloads constructor(context: Context, attrs: Attri
         var FILTER_TRACKER = ""
             private set
     }
+
+    enum class Filters(val value: Char, @StringRes val stringRes: Int) {
+        UnreadProgress('u', R.string.read_progress),
+        Unread('r', R.string.unread),
+        Downloaded('d', R.string.downloaded),
+        Completed('c', R.string.status),
+        SeriesType('m', R.string.series_type),
+        Tracked('t', R.string.tracked);
+
+        companion object {
+            val DEFAULT_ORDER = listOf(
+                UnreadProgress,
+                Unread,
+                Downloaded,
+                Completed,
+                SeriesType,
+                Tracked
+            ).joinToString("")
+
+            fun filterOf(char: Char): Filters? {
+                return Filters::class.java.enumConstants?.find { it.value == char }
+            }
+        }
+    }
 }

app/src/main/java/eu/kanade/tachiyomi/ui/library/filter/ManageFilterItem.kt

@@ -83,17 +83,7 @@ class ManageFilterItem(val char: Char) : AbstractFlexibleItem<ManageFilterItem.H
         }
 
         fun bind(char: Char) {
-            binding.title.setText(
-                when (char) {
-                    'u' -> R.string.read_progress
-                    'r' -> R.string.unread
-                    'd' -> R.string.downloaded
-                    'c' -> R.string.status
-                    'm' -> R.string.series_type
-                    't' -> R.string.tracked
-                    else -> R.string.unread
-                }
-            )
+            binding.title.setText(FilterBottomSheet.Filters.filterOf(char)?.stringRes ?: 0)
         }
     }
 }