Add section features

Filtration.ObjectModel/Commands/ItemFilterScript/MoveSectionToIndexCommand.cs

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+using System.Collections.Generic;
+
+namespace Filtration.ObjectModel.Commands.ItemFilterScript
+{
+    public class MoveSectionToIndexCommand : IUndoableCommand
+    {
+        private readonly IItemFilterScript _itemFilterScript;
+        private int _sectionStart;
+        private int _sectionSize;
+        private int _index;
+
+        public MoveSectionToIndexCommand(IItemFilterScript itemFilterScript, int sectionStart, int sectionSize, int index)
+        {
+            _itemFilterScript = itemFilterScript;
+            _sectionStart = sectionStart;
+            _sectionSize = sectionSize;
+            _index = index;
+        }
+        public void Execute()
+        {
+            List<IItemFilterBlockBase> blocksToMove = new List<IItemFilterBlockBase>();
+            for(var i = 0; i < _sectionSize; i++)
+            {
+                blocksToMove.Add(_itemFilterScript.ItemFilterBlocks[_sectionStart]);
+                _itemFilterScript.ItemFilterBlocks.RemoveAt(_sectionStart);
+            }
+            for (var i = 0; i < _sectionSize; i++)
+            {
+                _itemFilterScript.ItemFilterBlocks.Insert(_index + i, blocksToMove[i]);
+            }
+        }
+
+        public void Undo()
+        {
+            List<IItemFilterBlockBase> blocksToMove = new List<IItemFilterBlockBase>();
+            for (var i = 0; i < _sectionSize; i++)
+            {
+                blocksToMove.Add(_itemFilterScript.ItemFilterBlocks[_index]);
+                _itemFilterScript.ItemFilterBlocks.RemoveAt(_index);
+            }
+            for (var i = 0; i < _sectionSize; i++)
+            {
+                _itemFilterScript.ItemFilterBlocks.Insert(_sectionStart + i, blocksToMove[i]);
+            }
+        }
+
+        public void Redo() => Execute();
+    }
+}

Filtration.ObjectModel/Commands/ItemFilterScript/PasteSectionCommand.cs

@@ -0,0 +1,49 @@
+using System;
+using System.Collections.Generic;
+
+namespace Filtration.ObjectModel.Commands.ItemFilterScript
+{
+    public class PasteSectionCommand : IUndoableCommand
+    {
+        private readonly IItemFilterScript _itemFilterScript;
+        private readonly List<IItemFilterBlockBase> _pastedItemFilterBlocks;
+        private readonly IItemFilterBlockBase _addAfterItemFilterBlock;
+
+        public PasteSectionCommand(IItemFilterScript itemFilterScript, List<IItemFilterBlockBase> pastedItemFilterBlocks, IItemFilterBlockBase addAfterItemFilterBlock)
+        {
+            _itemFilterScript = itemFilterScript;
+            _pastedItemFilterBlocks = pastedItemFilterBlocks;
+            _addAfterItemFilterBlock = addAfterItemFilterBlock;
+        }
+
+        public void Execute()
+        {
+            if (_addAfterItemFilterBlock != null)
+            {
+                var lastAddedBlock = _addAfterItemFilterBlock;
+                foreach(var block in _pastedItemFilterBlocks)
+                {
+                    _itemFilterScript.ItemFilterBlocks.Insert(_itemFilterScript.ItemFilterBlocks.IndexOf(lastAddedBlock) + 1, block);
+                    lastAddedBlock = block;
+                }
+            }
+            else
+            {
+                foreach (var block in _pastedItemFilterBlocks)
+                {
+                    _itemFilterScript.ItemFilterBlocks.Add(block);
+                }
+            }
+        }
+
+        public void Undo()
+        {
+            foreach (var block in _pastedItemFilterBlocks)
+            {
+                _itemFilterScript.ItemFilterBlocks.Remove(block);
+            }
+        }
+
+        public void Redo() => Execute();
+    }
+}

Filtration.ObjectModel/Commands/ItemFilterScript/RemoveSectionCommand.cs

@@ -0,0 +1,42 @@
+using System;
+using System.Collections.Generic;
+
+namespace Filtration.ObjectModel.Commands.ItemFilterScript
+{
+    public class RemoveSectionCommand : IUndoableCommand
+    {
+        private readonly IItemFilterScript _itemFilterScript;
+        private List<IItemFilterBlockBase> _removedItemFilterBlocks;
+        private int _sectionStart;
+        private int _sectionSize;
+
+        public RemoveSectionCommand(IItemFilterScript itemFilterScript, int sectionStart, int sectionSize)
+        {
+            _itemFilterScript = itemFilterScript;
+            _sectionStart = sectionStart;
+            _sectionSize = sectionSize;
+            _removedItemFilterBlocks = new List<IItemFilterBlockBase>();
+            for(var i = 0; i < _sectionSize; i++)
+            {
+                _removedItemFilterBlocks.Add(_itemFilterScript.ItemFilterBlocks[_sectionStart + i]);
+            }
+        }
+        public void Execute()
+        {
+            for (var i = 0; i < _sectionSize; i++)
+            {
+                _itemFilterScript.ItemFilterBlocks.RemoveAt(_sectionStart);
+            }
+        }
+
+        public void Undo()
+        {
+            for (var i = 0; i < _sectionSize; i++)
+            {
+                _itemFilterScript.ItemFilterBlocks.Insert(_sectionStart + i, _removedItemFilterBlocks[i]);
+            }
+        }
+
+        public void Redo() => Execute();
+    }
+}