Code improvement in StatsViewModel

app/src/main/java/dev/lucasnlm/antimine/stats/viewmodel/StatsViewModel.kt

@@ -3,6 +3,7 @@ package dev.lucasnlm.antimine.stats.viewmodel
 import dev.lucasnlm.antimine.R
 import dev.lucasnlm.antimine.common.level.database.models.Stats
 import dev.lucasnlm.antimine.common.level.models.Difficulty
+import dev.lucasnlm.antimine.common.level.models.Minefield
 import dev.lucasnlm.antimine.common.level.repository.IDimensionRepository
 import dev.lucasnlm.antimine.common.level.repository.IMinefieldRepository
 import dev.lucasnlm.antimine.common.level.repository.IStatsRepository
@@ -27,44 +28,35 @@ class StatsViewModel(
             preferenceRepository,
         )
 
-        return listOf(
+        return with(stats) {
+            listOf(
                 // General
-            stats.fold().copy(title = R.string.general),
+                fold().copy(title = R.string.general),
 
                 // Standard
-            stats.filter {
+                filterStandard(standardSize).fold().copy(title = R.string.standard),
-                it.width == standardSize.width && it.height == standardSize.height
-            }.fold().copy(title = R.string.standard),
 
                 // Expert
-            stats.filter {
+                filter(::isExpert).fold().copy(title = R.string.expert),
-                it.mines == 99 && it.width == 24 && it.height == 24
-            }.fold().copy(title = R.string.expert),
 
                 // Intermediate
-            stats.filter {
+                filter(::isIntermediate).fold().copy(title = R.string.intermediate),
-                it.mines == 40 && it.width == 16 && it.height == 16
-            }.fold().copy(title = R.string.intermediate),
 
                 // Beginner
-            stats.filter {
+                filter(::isBeginner).fold().copy(title = R.string.beginner),
-                it.mines == 10 && it.width == 9 && it.height == 9
-            }.fold().copy(title = R.string.beginner),
 
                 // Custom
-            stats.filterNot {
+                filterNot(::isExpert)
-                it.mines == 99 && it.width == 24 && it.height == 24
+                    .filterNot(::isIntermediate)
-            }.filterNot {
+                    .filterNot(::isBeginner)
-                it.mines == 40 && it.width == 16 && it.height == 16
+                    .filterNotStandard(standardSize)
-            }.filterNot {
+                    .fold()
-                it.mines == 10 && it.width == 9 && it.height == 9
+                    .copy(title = R.string.custom),
-            }.filterNot {
-                it.width == standardSize.width && it.height == standardSize.height
-            }.fold().copy(title = R.string.custom),
             ).filter {
                 it.totalGames > 0
             }
         }
+    }
 
     private suspend fun deleteAll() {
         statsRepository.getAllStats(0).lastOrNull()?.let {
@@ -144,4 +136,26 @@ class StatsViewModel(
             }
         }
     }
+
+    companion object {
+        private fun isExpert(stats: Stats): Boolean {
+            return stats.mines == 99 && stats.width == 24 && stats.height == 24
+        }
+
+        private fun isIntermediate(stats: Stats): Boolean {
+            return stats.mines == 40 && stats.width == 16 && stats.height == 16
+        }
+
+        private fun isBeginner(stats: Stats): Boolean {
+            return stats.mines == 10 && stats.width == 9 && stats.height == 9
+        }
+
+        private fun List<Stats>.filterStandard(standardSize: Minefield) = filter {
+            it.width == standardSize.width && it.height == standardSize.height
+        }
+
+        private fun List<Stats>.filterNotStandard(standardSize: Minefield) = filterNot {
+            it.width == standardSize.width && it.height == standardSize.height
+        }
+    }
 }