Fixed sorting habit groups and sub habits by score

uhabits-core/src/jvmMain/java/org/isoron/uhabits/core/models/HabitList.kt

@@ -136,6 +136,17 @@ abstract class HabitList : Iterable<Habit> {
      */
     abstract fun remove(h: Habit)
 
+    /**
+     * Removes the reference to the habit from the list at the given position.
+     *
+     * Does not affect the repository or records
+     *
+     * If the given habit is not in the list, does nothing.
+     *
+     * @param h the habit to be removed.
+     */
+    abstract fun removeAt(position: Int)
+
     /**
      * Removes all the habits from the list.
      */

uhabits-core/src/jvmMain/java/org/isoron/uhabits/core/models/memory/MemoryHabitList.kt

@@ -191,6 +191,13 @@ class MemoryHabitList : HabitList {
         observable.notifyListeners()
     }
 
+    @Synchronized
+    override fun removeAt(position: Int) {
+        throwIfHasParent()
+        list.removeAt(position)
+        observable.notifyListeners()
+    }
+
     @Synchronized
     override fun reorder(from: Habit, to: Habit) {
         throwIfHasParent()

uhabits-core/src/jvmMain/java/org/isoron/uhabits/core/models/sqlite/SQLiteHabitList.kt

@@ -157,6 +157,12 @@ class SQLiteHabitList @Inject constructor(private val modelFactory: ModelFactory
         observable.notifyListeners()
     }
 
+    @Synchronized
+    override fun removeAt(position: Int) {
+        loadRecords()
+        list.removeAt(position)
+    }
+
     @Synchronized
     override fun removeAll() {
         list.removeAll()

uhabits-core/src/jvmMain/java/org/isoron/uhabits/core/ui/screens/habits/list/HabitCardListCache.kt

@@ -261,11 +261,6 @@ class HabitCardListCache @Inject constructor(
     @Synchronized
     fun reorder(from: Int, to: Int) {
         if (from == to) return
-        val uuid = if (data.positionTypes[from] == STANDALONE_HABIT) {
-            data.positionToHabit[from]!!.uuid
-        } else {
-            data.positionToHabitGroup[from]!!.uuid
-        }
         if (data.positionTypes[from] == STANDALONE_HABIT) {
             val habit = data.positionToHabit[from]!!
             data.performMove(habit, from, to)
@@ -423,10 +418,7 @@ class HabitCardListCache @Inject constructor(
             if (habit.parentUUID == null) {
                 return position <= habits.size
             } else {
-                val parent = uuidToHabitGroup[habit.parentUUID]
+                val parent = uuidToHabitGroup[habit.parentUUID] ?: return false
-                if (parent == null) {
-                    return false
-                }
                 val parentPosition = uuidToPosition[habit.parentUUID]!!
                 val parentIndex = habitGroups.indexOf(parent)
                 val nextGroup = habitGroups.getOrNull(parentIndex + 1)
@@ -494,7 +486,7 @@ class HabitCardListCache @Inject constructor(
             // Workaround for https://github.com/iSoron/uhabits/issues/968
             val checkedToPosition = if (toPosition > positionTypes.size) {
                 logger.error("performMove: $toPosition for habit is strictly higher than ${habits.size}")
-                positionTypes.size
+                positionTypes.size - 1
             } else {
                 toPosition
             }
@@ -515,15 +507,16 @@ class HabitCardListCache @Inject constructor(
             } else {
                 val hgr = uuidToHabitGroup[habit.parentUUID]
                 val hgrIdx = habitGroups.indexOf(hgr)
-                val h = positionToHabit[fromPosition]!!
+                val fromIdx = subHabits[hgrIdx].indexOf(habit)
-                subHabits[hgrIdx].remove(h)
+                subHabits[hgrIdx].removeAt(fromIdx)
                 positionTypes.removeAt(fromPosition)
                 if (fromPosition < checkedToPosition) {
                     decrementPositions(fromPosition + 1, checkedToPosition)
                 } else {
                     incrementPositions(checkedToPosition, fromPosition - 1)
                 }
-                subHabits[hgrIdx].add(checkedToPosition - uuidToPosition[hgr!!.uuid]!! - 1, habit)
+                val toIdx = checkedToPosition - uuidToPosition[hgr!!.uuid]!! - 1
+                subHabits[hgrIdx].add(toIdx, habit)
                 positionTypes.add(checkedToPosition, SUB_HABIT)
             }