Implemented script-level undo/redo (currently hidden in UI)

.gitignore

@@ -1,29 +1,42 @@
 ## Ignore Visual Studio temporary files, build results, and
 ## files generated by popular Visual Studio add-ons.
+##
+## Get latest from https://github.com/github/gitignore/blob/master/VisualStudio.gitignore
 
 # User-specific files
 *.suo
 *.user
+*.userosscache
 *.sln.docstates
 
+# User-specific files (MonoDevelop/Xamarin Studio)
+*.userprefs
+
 # Build results
 [Dd]ebug/
 [Dd]ebugPublic/
 [Rr]elease/
+[Rr]eleases/
 x64/
-build/
+x86/
 bld/
 [Bb]in/
 [Oo]bj/
+[Ll]og/
 
-# Roslyn cache directories
-*.ide/
+# Visual Studio 2015/2017 cache/options directory
+.vs/
+# Uncomment if you have tasks that create the project's static files in wwwroot
+#wwwroot/
+
+# Visual Studio 2017 auto generated files
+Generated\ Files/
 
 # MSTest test Results
 [Tt]est[Rr]esult*/
 [Bb]uild[Ll]og.*
 
-#NUNIT
+# NUNIT
 *.VisualState.xml
 TestResult.xml
 
@@ -32,6 +45,19 @@ TestResult.xml
 [Rr]eleasePS/
 dlldata.c
 
+# Benchmark Results
+BenchmarkDotNet.Artifacts/
+
+# .NET Core
+project.lock.json
+project.fragment.lock.json
+artifacts/
+**/Properties/launchSettings.json
+
+# StyleCop
+StyleCopReport.xml
+
+# Files built by Visual Studio
 *_i.c
 *_p.c
 *_i.h
@@ -64,14 +90,21 @@ _Chutzpah*
 ipch/
 *.aps
 *.ncb
+*.opendb
 *.opensdf
 *.sdf
 *.cachefile
+*.VC.db
+*.VC.VC.opendb
 
 # Visual Studio profiler
 *.psess
 *.vsp
 *.vspx
+*.sap
+
+# Visual Studio Trace Files
+*.e2e
 
 # TFS 2012 Local Workspace
 $tf/
@@ -84,7 +117,7 @@ _ReSharper*/
 *.[Rr]e[Ss]harper
 *.DotSettings.user
 
-# JustCode is a .NET coding addin-in
+# JustCode is a .NET coding add-in
 .JustCode
 
 # TeamCity is a build add-in
@@ -93,9 +126,18 @@ _TeamCity*
 # DotCover is a Code Coverage Tool
 *.dotCover
 
+# AxoCover is a Code Coverage Tool
+.axoCover/*
+!.axoCover/settings.json
+
+# Visual Studio code coverage results
+*.coverage
+*.coveragexml
+
 # NCrunch
 _NCrunch_*
 .*crunch*.local.xml
+nCrunchTemp_*
 
 # MightyMoose
 *.mm.*
@@ -123,42 +165,63 @@ publish/
 # Publish Web Output
 *.[Pp]ublish.xml
 *.azurePubxml
-## TODO: Comment the next line if you want to checkin your
-## web deploy settings but do note that will include unencrypted
-## passwords
-#*.pubxml
+# Note: Comment the next line if you want to checkin your web deploy settings,
+# but database connection strings (with potential passwords) will be unencrypted
+*.pubxml
+*.publishproj
 
-# NuGet Packages Directory
-packages/*
-## TODO: If the tool you use requires repositories.config
-## uncomment the next line
-#!packages/repositories.config
+# Microsoft Azure Web App publish settings. Comment the next line if you want to
+# checkin your Azure Web App publish settings, but sensitive information contained
+# in these scripts will be unencrypted
+PublishScripts/
 
-# Enable "build/" folder in the NuGet Packages folder since
-# NuGet packages use it for MSBuild targets.
-# This line needs to be after the ignore of the build folder
-# (and the packages folder if the line above has been uncommented)
-!packages/build/
+# NuGet Packages
+*.nupkg
+# The packages folder can be ignored because of Package Restore
+**/[Pp]ackages/*
+# except build/, which is used as an MSBuild target.
+!**/[Pp]ackages/build/
+# Uncomment if necessary however generally it will be regenerated when needed
+#!**/[Pp]ackages/repositories.config
+# NuGet v3's project.json files produces more ignorable files
+*.nuget.props
+*.nuget.targets
 
-# Windows Azure Build Output
+# Microsoft Azure Build Output
 csx/
 *.build.csdef
 
-# Windows Store app package directory
+# Microsoft Azure Emulator
+ecf/
+rcf/
+
+# Windows Store app package directories and files
 AppPackages/
+BundleArtifacts/
+Package.StoreAssociation.xml
+_pkginfo.txt
+*.appx
+
+# Visual Studio cache files
+# files ending in .cache can be ignored
+*.[Cc]ache
+# but keep track of directories ending in .cache
+!*.[Cc]ache/
 
 # Others
-sql/
-*.Cache
 ClientBin/
-[Ss]tyle[Cc]op.*
 ~$*
 *~
 *.dbmdl
 *.dbproj.schemaview
+*.jfm
 *.pfx
 *.publishsettings
-node_modules/
+orleans.codegen.cs
+
+# Since there are multiple workflows, uncomment next line to ignore bower_components
+# (https://github.com/github/gitignore/pull/1529#issuecomment-104372622)
+#bower_components/
 
 # RIA/Silverlight projects
 Generated_Code/
@@ -174,6 +237,7 @@ UpgradeLog*.htm
 # SQL Server files
 *.mdf
 *.ldf
+*.ndf
 
 # Business Intelligence projects
 *.rdl.data
@@ -183,7 +247,69 @@ UpgradeLog*.htm
 # Microsoft Fakes
 FakesAssemblies/
 
-# LightSwitch generated files
-GeneratedArtifacts/
-_Pvt_Extensions/
-ModelManifest.xml
+# GhostDoc plugin setting file
+*.GhostDoc.xml
+
+# Node.js Tools for Visual Studio
+.ntvs_analysis.dat
+node_modules/
+
+# TypeScript v1 declaration files
+typings/
+
+# Visual Studio 6 build log
+*.plg
+
+# Visual Studio 6 workspace options file
+*.opt
+
+# Visual Studio 6 auto-generated workspace file (contains which files were open etc.)
+*.vbw
+
+# Visual Studio LightSwitch build output
+**/*.HTMLClient/GeneratedArtifacts
+**/*.DesktopClient/GeneratedArtifacts
+**/*.DesktopClient/ModelManifest.xml
+**/*.Server/GeneratedArtifacts
+**/*.Server/ModelManifest.xml
+_Pvt_Extensions
+
+# Paket dependency manager
+.paket/paket.exe
+paket-files/
+
+# FAKE - F# Make
+.fake/
+
+# JetBrains Rider
+.idea/
+*.sln.iml
+
+# CodeRush
+.cr/
+
+# Python Tools for Visual Studio (PTVS)
+__pycache__/
+*.pyc
+
+# Cake - Uncomment if you are using it
+# tools/**
+# !tools/packages.config
+
+# Tabs Studio
+*.tss
+
+# Telerik's JustMock configuration file
+*.jmconfig
+
+# BizTalk build output
+*.btp.cs
+*.btm.cs
+*.odx.cs
+*.xsd.cs
+
+# OpenCover UI analysis results
+OpenCover/
+
+# Azure Stream Analytics local run output 
+ASALocalRun/

Filtration.ObjectModel/Commands/CommandManager.cs

@@ -28,8 +28,7 @@ namespace Filtration.ObjectModel.Commands
         public void ExecuteCommand(ICommand command)
         {
             command.Execute();
-            var undoableCommand = command as IUndoableCommand;
-            if (undoableCommand != null)
+            if (command is IUndoableCommand undoableCommand)
             {
                 _undoCommandStack.Push(undoableCommand);
                 _redoCommandStack.Clear();

Filtration.ObjectModel/Commands/ItemFilterScript/AddBlockCommand.cs

@@ -0,0 +1,37 @@
+using System;
+
+namespace Filtration.ObjectModel.Commands.ItemFilterScript
+{
+    public class AddBlockCommand : IUndoableCommand
+    {
+        private readonly IItemFilterScript _itemFilterScript;
+        private readonly IItemFilterBlockBase _addAfterItemFilterBlock;
+        private IItemFilterBlock _newItemFilterBlock;
+
+        public AddBlockCommand(IItemFilterScript itemFilterScript, IItemFilterBlockBase addAfterItemFilterBlock)
+        {
+            _itemFilterScript = itemFilterScript;
+            _addAfterItemFilterBlock = addAfterItemFilterBlock;
+        }
+        public void Execute()
+        {
+            _newItemFilterBlock = new ItemFilterBlock(_itemFilterScript);
+            if (_addAfterItemFilterBlock != null)
+            {
+                _itemFilterScript.ItemFilterBlocks.Insert(_itemFilterScript.ItemFilterBlocks.IndexOf(_addAfterItemFilterBlock) + 1, _newItemFilterBlock);
+            }
+            else
+            {
+                _itemFilterScript.ItemFilterBlocks.Add(_newItemFilterBlock);
+            }
+
+        }
+
+        public void Undo()
+        {
+            _itemFilterScript.ItemFilterBlocks.Remove(_newItemFilterBlock);
+        }
+
+        public void Redo() => Execute();
+    }
+}

Filtration.ObjectModel/Commands/ItemFilterScript/AddCommentBlockCommand.cs

@@ -0,0 +1,37 @@
+using System;
+
+namespace Filtration.ObjectModel.Commands.ItemFilterScript
+{
+    public class AddCommentBlockCommand : IUndoableCommand
+    {
+        private readonly IItemFilterScript _itemFilterScript;
+        private readonly IItemFilterBlockBase _addAfterItemFilterBlock;
+        private IItemFilterCommentBlock _newItemFilterBlock;
+
+        public AddCommentBlockCommand(IItemFilterScript itemFilterScript, IItemFilterBlockBase addAfterItemFilterBlock)
+        {
+            _itemFilterScript = itemFilterScript;
+            _addAfterItemFilterBlock = addAfterItemFilterBlock;
+        }
+        public void Execute()
+        {
+            _newItemFilterBlock = new ItemFilterCommentBlock(_itemFilterScript);
+            if (_addAfterItemFilterBlock != null)
+            {
+                _itemFilterScript.ItemFilterBlocks.Insert(_itemFilterScript.ItemFilterBlocks.IndexOf(_addAfterItemFilterBlock) + 1, _newItemFilterBlock);
+            }
+            else
+            {
+                _itemFilterScript.ItemFilterBlocks.Add(_newItemFilterBlock);
+            }
+
+        }
+
+        public void Undo()
+        {
+            _itemFilterScript.ItemFilterBlocks.Remove(_newItemFilterBlock);
+        }
+
+        public void Redo() => Execute();
+    }
+}

Filtration.ObjectModel/Commands/ItemFilterScript/MoveBlockDownCommand.cs

@@ -0,0 +1,39 @@
+using System;
+
+namespace Filtration.ObjectModel.Commands.ItemFilterScript
+{
+    public class MoveBlockDownCommand : IUndoableCommand
+    {
+        private readonly IItemFilterScript _itemFilterScript;
+        private readonly IItemFilterBlockBase _blockToMove;
+        private int _indexMovedFrom;
+
+        public MoveBlockDownCommand(IItemFilterScript itemFilterScript, IItemFilterBlockBase blockToMove)
+        {
+            _itemFilterScript = itemFilterScript;
+            _blockToMove = blockToMove;
+        }
+
+        public void Execute()
+        {
+            _indexMovedFrom = _itemFilterScript.ItemFilterBlocks.IndexOf(_blockToMove);
+
+            if (_indexMovedFrom >= _itemFilterScript.ItemFilterBlocks.Count)
+            {
+                throw new InvalidOperationException("Cannot move the bottom block down");
+            }
+
+            _itemFilterScript.ItemFilterBlocks.Remove(_blockToMove);
+            _itemFilterScript.ItemFilterBlocks.Insert(_indexMovedFrom + 1, _blockToMove);
+
+        }
+
+        public void Undo()
+        {
+            _itemFilterScript.ItemFilterBlocks.Remove(_blockToMove);
+            _itemFilterScript.ItemFilterBlocks.Insert(_indexMovedFrom, _blockToMove);
+        }
+
+        public void Redo() => Execute();
+    }
+}

Filtration.ObjectModel/Commands/ItemFilterScript/MoveBlockToBottomCommand.cs

@@ -0,0 +1,30 @@
+namespace Filtration.ObjectModel.Commands.ItemFilterScript
+{
+    public class MoveBlockToBottomCommand : IUndoableCommand
+    {
+        private readonly IItemFilterScript _itemFilterScript;
+        private readonly IItemFilterBlockBase _blockToMove;
+        private int _indexMovedFrom;
+
+        public MoveBlockToBottomCommand(IItemFilterScript itemFilterScript, IItemFilterBlockBase blockToMove)
+        {
+            _itemFilterScript = itemFilterScript;
+            _blockToMove = blockToMove;
+        }
+        public void Execute()
+        {
+            _indexMovedFrom = _itemFilterScript.ItemFilterBlocks.IndexOf(_blockToMove);
+            
+            _itemFilterScript.ItemFilterBlocks.Remove(_blockToMove);
+            _itemFilterScript.ItemFilterBlocks.Add(_blockToMove);
+        }
+
+        public void Undo()
+        {
+            _itemFilterScript.ItemFilterBlocks.Remove(_blockToMove);
+            _itemFilterScript.ItemFilterBlocks.Insert(_indexMovedFrom, _blockToMove);
+        }
+
+        public void Redo() => Execute();
+    }
+}

Filtration.ObjectModel/Commands/ItemFilterScript/MoveBlockToTopCommand.cs

@@ -0,0 +1,30 @@
+namespace Filtration.ObjectModel.Commands.ItemFilterScript
+{
+    public class MoveBlockToTopCommand : IUndoableCommand
+    {
+        private readonly IItemFilterScript _itemFilterScript;
+        private readonly IItemFilterBlockBase _blockToMove;
+        private int _indexMovedFrom;
+
+        public MoveBlockToTopCommand(IItemFilterScript itemFilterScript, IItemFilterBlockBase blockToMove)
+        {
+            _itemFilterScript = itemFilterScript;
+            _blockToMove = blockToMove;
+        }
+        public void Execute()
+        {
+            _indexMovedFrom = _itemFilterScript.ItemFilterBlocks.IndexOf(_blockToMove);
+
+            _itemFilterScript.ItemFilterBlocks.Remove(_blockToMove);
+            _itemFilterScript.ItemFilterBlocks.Insert(0, _blockToMove);
+        }
+
+        public void Undo()
+        {
+            _itemFilterScript.ItemFilterBlocks.Remove(_blockToMove);
+            _itemFilterScript.ItemFilterBlocks.Insert(_indexMovedFrom, _blockToMove);
+        }
+
+        public void Redo() => Execute();
+    }
+}

Filtration.ObjectModel/Commands/ItemFilterScript/MoveBlockUpCommand.cs

@@ -0,0 +1,39 @@
+using System;
+
+namespace Filtration.ObjectModel.Commands.ItemFilterScript
+{
+    public class MoveBlockUpCommand : IUndoableCommand
+    {
+        private readonly IItemFilterScript _itemFilterScript;
+        private readonly IItemFilterBlockBase _blockToMove;
+        private int _indexMovedFrom;
+
+        public MoveBlockUpCommand(IItemFilterScript itemFilterScript, IItemFilterBlockBase blockToMove)
+        {
+            _itemFilterScript = itemFilterScript;
+            _blockToMove = blockToMove;
+        }
+
+        public void Execute()
+        {
+            _indexMovedFrom = _itemFilterScript.ItemFilterBlocks.IndexOf(_blockToMove);
+
+            if (_indexMovedFrom <= 0)
+            {
+                throw new InvalidOperationException("Cannot move the top block up");
+            }
+
+            _itemFilterScript.ItemFilterBlocks.Remove(_blockToMove);
+            _itemFilterScript.ItemFilterBlocks.Insert(_indexMovedFrom-1, _blockToMove);
+
+        }
+
+        public void Undo()
+        {
+            _itemFilterScript.ItemFilterBlocks.Remove(_blockToMove);
+            _itemFilterScript.ItemFilterBlocks.Insert(_indexMovedFrom, _blockToMove);
+        }
+
+        public void Redo() => Execute();
+    }
+}

Filtration.ObjectModel/Commands/ItemFilterScript/PasteBlockCommand.cs

@@ -0,0 +1,37 @@
+using System;
+
+namespace Filtration.ObjectModel.Commands.ItemFilterScript
+{
+    public class PasteBlockCommand : IUndoableCommand
+    {
+        private readonly IItemFilterScript _itemFilterScript;
+        private readonly IItemFilterBlockBase _pastedItemFilterBlock;
+        private readonly IItemFilterBlockBase _addAfterItemFilterBlock;
+
+        public PasteBlockCommand(IItemFilterScript itemFilterScript, IItemFilterBlockBase pastedItemFilterBlock, IItemFilterBlockBase addAfterItemFilterBlock)
+        {
+            _itemFilterScript = itemFilterScript;
+            _pastedItemFilterBlock = pastedItemFilterBlock;
+            _addAfterItemFilterBlock = addAfterItemFilterBlock;
+        }
+
+        public void Execute()
+        {
+            if (_addAfterItemFilterBlock != null)
+            {
+                _itemFilterScript.ItemFilterBlocks.Insert(_itemFilterScript.ItemFilterBlocks.IndexOf(_addAfterItemFilterBlock) + 1, _pastedItemFilterBlock);
+            }
+            else
+            {
+                _itemFilterScript.ItemFilterBlocks.Add(_pastedItemFilterBlock);
+            }
+        }
+
+        public void Undo()
+        {
+            _itemFilterScript.ItemFilterBlocks.Remove(_pastedItemFilterBlock);
+        }
+
+        public void Redo() => Execute();
+    }
+}

Filtration.ObjectModel/Commands/ItemFilterScript/RemoveBlockCommand.cs

@@ -0,0 +1,29 @@
+using System;
+
+namespace Filtration.ObjectModel.Commands.ItemFilterScript
+{
+    public class RemoveBlockCommand : IUndoableCommand
+    {
+        private readonly IItemFilterScript _itemFilterScript;
+        private IItemFilterBlockBase _removedItemFilterBlock;
+        private int _indexRemovedFrom;
+
+        public RemoveBlockCommand(IItemFilterScript itemFilterScript, IItemFilterBlockBase itemFilterBlockBase)
+        {
+            _itemFilterScript = itemFilterScript;
+            _removedItemFilterBlock = itemFilterBlockBase;
+        }
+        public void Execute()
+        {
+            _indexRemovedFrom = _itemFilterScript.ItemFilterBlocks.IndexOf(_removedItemFilterBlock);
+            _itemFilterScript.ItemFilterBlocks.Remove(_removedItemFilterBlock);
+        }
+
+        public void Undo()
+        {
+            _itemFilterScript.ItemFilterBlocks.Insert(_indexRemovedFrom, _removedItemFilterBlock);
+        }
+
+        public void Redo() => Execute();
+    }
+}

Filtration.ObjectModel/Commands/ItemFilterScript/SetScriptDescriptionCommand.cs

@@ -0,0 +1,30 @@
+using System;
+
+namespace Filtration.ObjectModel.Commands.ItemFilterScript
+{
+    public class SetScriptDescriptionCommand : IUndoableCommand
+    {
+        private readonly IItemFilterScript _itemFilterScript;
+        private readonly string _newDescription;
+        private string _oldDescription;
+
+        public SetScriptDescriptionCommand(IItemFilterScript itemFilterScript, string newDescription)
+        {
+            _itemFilterScript = itemFilterScript;
+            _newDescription = newDescription;
+        }
+
+        public void Execute()
+        {
+            _oldDescription = _itemFilterScript.Description;
+            _itemFilterScript.Description = _newDescription;
+        }
+
+        public void Undo()
+        {
+            _itemFilterScript.Description = _oldDescription;
+        }
+
+        public void Redo() => Execute();
+    }
+}

Filtration.ObjectModel/Filtration.ObjectModel.csproj

@@ -76,6 +76,15 @@
     <Compile Include="BlockItemTypes\WidthBlockItem.cs" />
     <Compile Include="Commands\CommandManager.cs" />
     <Compile Include="Commands\ICommand.cs" />
+    <Compile Include="Commands\ItemFilterScript\PasteBlockCommand.cs" />
+    <Compile Include="Commands\ItemFilterScript\MoveBlockToBottomCommand.cs" />
+    <Compile Include="Commands\ItemFilterScript\AddCommentBlockCommand.cs" />
+    <Compile Include="Commands\ItemFilterScript\MoveBlockDownCommand.cs" />
+    <Compile Include="Commands\ItemFilterScript\MoveBlockUpCommand.cs" />
+    <Compile Include="Commands\ItemFilterScript\MoveBlockToTopCommand.cs" />
+    <Compile Include="Commands\ItemFilterScript\SetScriptDescriptionCommand.cs" />
+    <Compile Include="Commands\ItemFilterScript\RemoveBlockCommand.cs" />
+    <Compile Include="Commands\ItemFilterScript\AddBlockCommand.cs" />
     <Compile Include="Commands\IUndoableCommand.cs" />
     <Compile Include="Enums\BlockAction.cs" />
     <Compile Include="Enums\BlockItemType.cs" />

Filtration.ObjectModel/ItemFilterBlock.cs

@@ -4,6 +4,7 @@ using System.Linq;
 using System.Windows.Media;
 using Filtration.ObjectModel.BlockItemBaseTypes;
 using Filtration.ObjectModel.BlockItemTypes;
+using Filtration.ObjectModel.Commands;
 using Filtration.ObjectModel.Enums;
 using Filtration.ObjectModel.Extensions;
 
@@ -29,9 +30,20 @@ namespace Filtration.ObjectModel
     {
     }
 
-    public class ItemFilterBlockBase : IItemFilterBlockBase
+    public abstract class ItemFilterBlockBase : IItemFilterBlockBase
     {
+        protected ItemFilterBlockBase()
+        {
+        }
 
+        protected ItemFilterBlockBase(IItemFilterScript parentScript)
+        {
+            CommandManager = parentScript.CommandManager;
+            ParentScript = parentScript;
+        }
+
+        public ICommandManager CommandManager { get; }
+        public IItemFilterScript ParentScript { get; set; }
     }
 
     public interface IItemFilterCommentBlock : IItemFilterBlockBase
@@ -41,6 +53,10 @@ namespace Filtration.ObjectModel
 
     public class ItemFilterCommentBlock : ItemFilterBlockBase, IItemFilterCommentBlock
     {
+        public ItemFilterCommentBlock(IItemFilterScript parentScript) : base(parentScript)
+        {
+        }
+
         public string Comment { get; set; }
     }
 
@@ -48,14 +64,19 @@ namespace Filtration.ObjectModel
     {
         private ItemFilterBlockGroup _blockGroup;
 
-        public ItemFilterBlock()
+        internal ItemFilterBlock()
         {
-            ActionBlockItem = new ActionBlockItem(BlockAction.Show);
-            BlockItems = new ObservableCollection<IItemFilterBlockItem> {ActionBlockItem};
-            Enabled = true;
+            BlockItems = new ObservableCollection<IItemFilterBlockItem> { ActionBlockItem };
         }
 
-        public bool Enabled { get; set; }
+        public ItemFilterBlock(IItemFilterScript parentScript) : base(parentScript)
+        {
+            BlockItems = new ObservableCollection<IItemFilterBlockItem> { ActionBlockItem };
+        }
+
+        public ICommandManager CommandManager { get; }
+
+        public bool Enabled { get; set; } = true;
         public string Description { get; set; }
 
         public ItemFilterBlockGroup BlockGroup
@@ -98,7 +119,7 @@ namespace Filtration.ObjectModel
             }
         }
 
-        public ActionBlockItem ActionBlockItem { get; }
+        public ActionBlockItem ActionBlockItem { get; } = new ActionBlockItem(BlockAction.Show);
 
         public ObservableCollection<IItemFilterBlockItem> BlockItems { get; }
 

Filtration.ObjectModel/ItemFilterScript.cs

@@ -37,6 +37,7 @@ namespace Filtration.ObjectModel
     public class ItemFilterScript : IItemFilterScriptInternal
     {
         private bool _isDirty;
+        private string _description;
 
         internal ItemFilterScript()
         {
@@ -65,7 +66,18 @@ namespace Filtration.ObjectModel
         public IItemFilterScriptSettings ItemFilterScriptSettings { get; }
 
         public string FilePath { get; set; }
-        public string Description { get; set; }
+
+        public string Description
+        {
+            get => _description;
+            set
+            {
+                if (value == _description) return;
+                _description = value;
+                OnPropertyChanged();
+            }
+        }
+
         public DateTime DateModified { get; set; }
 
         public bool IsDirty

Filtration.Parser.Interface/Services/IItemFilterBlockTranslator.cs

@@ -5,10 +5,11 @@ namespace Filtration.Parser.Interface.Services
 {
     public interface IItemFilterBlockTranslator
     {
-        IItemFilterBlock TranslateStringToItemFilterBlock(string inputString, IItemFilterScriptSettings itemFilterScriptSettings);
+        IItemFilterBlock TranslateStringToItemFilterBlock(string inputString, IItemFilterScript parentItemFilterScript, bool initialiseBlockGroupHierarchyBuilder = false);
+        IItemFilterCommentBlock TranslateStringToItemFilterCommentBlock(string inputString, IItemFilterScript parentItemFilterScript);
+
         string TranslateItemFilterBlockToString(IItemFilterBlock block);
         void ReplaceAudioVisualBlockItemsFromString(ObservableCollection<IItemFilterBlockItem> blockItems, string inputString);
-        IItemFilterCommentBlock TranslateStringToItemFilterCommentBlock(string inputString);
         string TranslateItemFilterCommentBlockToString(IItemFilterCommentBlock itemFilterCommentBlock);
         string TranslateItemFilterBlockBaseToString(IItemFilterBlockBase itemFilterBlockBase);
     }

Filtration.Parser.Tests/Services/TestItemFilterBlockTranslator.cs

@@ -33,7 +33,7 @@ namespace Filtration.Parser.Tests.Services
             var testInputString = "#  This is a comment\r\n# Line 2 \r\n # Test";
 
             //Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterCommentBlock(testInputString);
+            var result = _testUtility.Translator.TranslateStringToItemFilterCommentBlock(testInputString, Mock.Of<IItemFilterScript>());
 
             //Assert
             Assert.AreEqual("  This is a comment\r\n Line 2 \r\n Test", result.Comment);
@@ -52,7 +52,7 @@ namespace Filtration.Parser.Tests.Services
                 .Returns(inputBlockGroup);
 
             // Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>(i => i.BlockGroupsEnabled));
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScript>(i => i.ItemFilterScriptSettings.BlockGroupsEnabled));
 
             //Assert
             Assert.IsTrue(string.IsNullOrEmpty(result.ActionBlockItem.Comment));
@@ -68,7 +68,7 @@ namespace Filtration.Parser.Tests.Services
             var inputString = $"Show #{testInputExpectedComment}" + Environment.NewLine;
 
             // Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>(i => i.BlockGroupsEnabled == false));
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScript>(i => i.ItemFilterScriptSettings.BlockGroupsEnabled == false));
 
             //Assert
             Assert.AreEqual(testInputExpectedComment, result.ActionBlockItem.Comment);
@@ -82,7 +82,7 @@ namespace Filtration.Parser.Tests.Services
                               "    ItemLevel >= 55";
 
             // Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>());
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, _testUtility.MockItemFilterScript);
 
             // Assert
             Assert.AreEqual(true, result.Enabled);
@@ -96,7 +96,7 @@ namespace Filtration.Parser.Tests.Services
                               "    ItemLevel >= 55";
             
             // Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>());
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, _testUtility.MockItemFilterScript);
 
             // Assert
             Assert.AreEqual(2, result.BlockItems.Count);
@@ -112,7 +112,7 @@ namespace Filtration.Parser.Tests.Services
                               "    ItemLevel >= 55";
 
             // Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>());
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, _testUtility.MockItemFilterScript);
 
             // Assert
             Assert.AreEqual(1, result.BlockItems.Count(b => b is ItemLevelBlockItem));
@@ -130,7 +130,7 @@ namespace Filtration.Parser.Tests.Services
 
             // Act
             _testUtility.MockBlockGroupHierarchyBuilder.Setup(b => b.IntegrateStringListIntoBlockGroupHierarchy(It.IsAny<IEnumerable<string>>())).Returns(inputBlockGroup).Verifiable();
-            _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>(i => i.BlockGroupsEnabled));
+            _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScript>(i => i.ItemFilterScriptSettings.BlockGroupsEnabled));
 
             // Assert
             Assert.AreEqual(true, inputBlockGroup.IsChecked);
@@ -145,7 +145,7 @@ namespace Filtration.Parser.Tests.Services
 
             // Act
             _testUtility.MockBlockGroupHierarchyBuilder.Setup(b => b.IntegrateStringListIntoBlockGroupHierarchy(It.IsAny<IEnumerable<string>>())).Returns(inputBlockGroup).Verifiable();
-            _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>(i => i.BlockGroupsEnabled));
+            _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScript>(i => i.ItemFilterScriptSettings.BlockGroupsEnabled));
 
             // Assert
             Assert.AreEqual(false, inputBlockGroup.IsChecked);
@@ -160,7 +160,7 @@ namespace Filtration.Parser.Tests.Services
 
             // Act
             _testUtility.MockBlockGroupHierarchyBuilder.Setup(b => b.IntegrateStringListIntoBlockGroupHierarchy(It.IsAny<IEnumerable<string>>())).Returns(inputBlockGroup).Verifiable();
-            _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>(i => i.BlockGroupsEnabled));
+            _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScript>(i => i.ItemFilterScriptSettings.BlockGroupsEnabled));
 
             // Assert
             _testUtility.MockBlockGroupHierarchyBuilder.Verify();
@@ -174,7 +174,7 @@ namespace Filtration.Parser.Tests.Services
 
             // Act
             _testUtility.MockBlockGroupHierarchyBuilder.Setup(b => b.IntegrateStringListIntoBlockGroupHierarchy(It.IsAny<IEnumerable<string>>())).Verifiable();
-            _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>(i => i.BlockGroupsEnabled));
+            _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScript>(i => i.ItemFilterScriptSettings.BlockGroupsEnabled));
 
             // Assert
             _testUtility.MockBlockGroupHierarchyBuilder.Verify(b => b.IntegrateStringListIntoBlockGroupHierarchy(It.IsAny<IEnumerable<string>>()), Times.Never);
@@ -187,7 +187,7 @@ namespace Filtration.Parser.Tests.Services
             var inputString = "Show    #" + Environment.NewLine;
 
             // Act
-            _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>(i => i.BlockGroupsEnabled));
+            _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScript>(i => i.ItemFilterScriptSettings.BlockGroupsEnabled));
 
             // Assert
             _testUtility.MockBlockGroupHierarchyBuilder.Verify(b => b.IntegrateStringListIntoBlockGroupHierarchy(It.IsAny<IEnumerable<string>>()), Times.Never);
@@ -206,7 +206,7 @@ namespace Filtration.Parser.Tests.Services
                 .Returns(testBlockGroup)
                 .Verifiable();
 
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>(i => i.BlockGroupsEnabled));
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScript>(i => i.ItemFilterScriptSettings.BlockGroupsEnabled));
 
             // Assert
             Assert.AreEqual(testBlockGroup, result.BlockGroup);
@@ -226,7 +226,7 @@ namespace Filtration.Parser.Tests.Services
                 .Returns(testBlockGroup)
                 .Verifiable();
 
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>(i => i.BlockGroupsEnabled));
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScript>(i => i.ItemFilterScriptSettings.BlockGroupsEnabled));
 
             // Assert
             Assert.AreEqual(testBlockGroup, result.BlockGroup);
@@ -240,7 +240,7 @@ namespace Filtration.Parser.Tests.Services
             var inputString = "Show # AAA - BBB - CCC" + Environment.NewLine;
 
             // Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>(i => i.BlockGroupsEnabled == false));
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScript>(i => i.ItemFilterScriptSettings.BlockGroupsEnabled == false));
 
             // Assert
             Assert.IsNull(result.BlockGroup);
@@ -254,7 +254,7 @@ namespace Filtration.Parser.Tests.Services
             var inputString = "Hide" + Environment.NewLine;
 
             // Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>());
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, _testUtility.MockItemFilterScript);
 
             // Assert
             Assert.AreEqual(1, result.BlockItems.Count(b => b is ActionBlockItem));
@@ -270,7 +270,7 @@ namespace Filtration.Parser.Tests.Services
                               "    ItemLevel >= 55";
 
             // Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>());
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, _testUtility.MockItemFilterScript);
 
             // Assert
             Assert.AreEqual("This is a test Block", result.Description);
@@ -290,7 +290,7 @@ namespace Filtration.Parser.Tests.Services
                               "    ItemLevel >= 55";
 
             // Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>());
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, _testUtility.MockItemFilterScript);
 
             // Assert
             Assert.AreEqual("Second Line", result.Description);
@@ -308,7 +308,7 @@ namespace Filtration.Parser.Tests.Services
                               "    DropLevel = 40";
 
             // Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>());
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, _testUtility.MockItemFilterScript);
 
             // Assert
 
@@ -326,7 +326,7 @@ namespace Filtration.Parser.Tests.Services
                               "    Corrupted True";
 
             // Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>());
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, _testUtility.MockItemFilterScript);
 
             // Assert
 
@@ -343,7 +343,7 @@ namespace Filtration.Parser.Tests.Services
                               "    Identified True";
 
             // Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>());
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, _testUtility.MockItemFilterScript);
 
             // Assert
 
@@ -360,7 +360,7 @@ namespace Filtration.Parser.Tests.Services
                               "    Quality < 18";
 
             // Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>());
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, _testUtility.MockItemFilterScript);
 
             // Assert
 
@@ -378,7 +378,7 @@ namespace Filtration.Parser.Tests.Services
                               "    Rarity > Normal";
 
             // Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>());
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, _testUtility.MockItemFilterScript);
 
             // Assert
 
@@ -396,7 +396,7 @@ namespace Filtration.Parser.Tests.Services
                               "    Rarity Normal";
 
             // Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>());
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, _testUtility.MockItemFilterScript);
 
             // Assert
             Assert.AreEqual(1, result.BlockItems.Count(b => b is RarityBlockItem));
@@ -413,7 +413,7 @@ namespace Filtration.Parser.Tests.Services
                               @"    Class ""Test Class 1"" ""TestOneWordClassInQuotes"" TestOneWordClassNotInQuotes ""Test Class 2""";
 
             // Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>());
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, _testUtility.MockItemFilterScript);
 
             // Assert
             Assert.AreEqual(1, result.BlockItems.Count(b => b is ClassBlockItem));
@@ -432,7 +432,7 @@ namespace Filtration.Parser.Tests.Services
                               @"    BaseType ""Test Base Type 1"" ""TestOneWordBaseTypeInQuotes"" TestOneWordBaseTypeNotInQuotes ""Test BaseType 2""";
 
             // Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>());
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, _testUtility.MockItemFilterScript);
 
             // Assert
             Assert.AreEqual(1, result.BlockItems.Count(b => b is BaseTypeBlockItem));
@@ -451,7 +451,7 @@ namespace Filtration.Parser.Tests.Services
                               "    Sockets > 2";
 
             // Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>());
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, _testUtility.MockItemFilterScript);
 
             // Assert
 
@@ -469,7 +469,7 @@ namespace Filtration.Parser.Tests.Services
                               "    LinkedSockets > 1";
 
             // Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>());
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, _testUtility.MockItemFilterScript);
 
             // Assert
 
@@ -487,7 +487,7 @@ namespace Filtration.Parser.Tests.Services
                               "    Width = 1";
 
             // Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>());
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, _testUtility.MockItemFilterScript);
 
             // Assert
 
@@ -505,7 +505,7 @@ namespace Filtration.Parser.Tests.Services
                               "    Height <= 3";
 
             // Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>());
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, _testUtility.MockItemFilterScript);
 
             // Assert
 
@@ -523,7 +523,7 @@ namespace Filtration.Parser.Tests.Services
                               "    Height <=3";
 
             // Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>());
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, _testUtility.MockItemFilterScript);
 
             // Assert
             Assert.AreEqual(1, result.BlockItems.Count(b => b is HeightBlockItem));
@@ -540,7 +540,7 @@ namespace Filtration.Parser.Tests.Services
                               "    SocketGroup RRGB";
 
             // Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>());
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, _testUtility.MockItemFilterScript);
 
             // Assert
             Assert.AreEqual(1, result.BlockItems.Count(b => b is SocketGroupBlockItem));
@@ -558,7 +558,7 @@ namespace Filtration.Parser.Tests.Services
                               "    SetTextColor 255 20 100";
 
             // Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>());
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, _testUtility.MockItemFilterScript);
 
             // Assert
             Assert.AreEqual(1, result.BlockItems.Count(b => b is TextColorBlockItem));
@@ -576,7 +576,7 @@ namespace Filtration.Parser.Tests.Services
                               "    SetTextColor 65 0 255 12";
 
             // Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>());
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, _testUtility.MockItemFilterScript);
 
             // Assert
             Assert.AreEqual(1, result.BlockItems.Count(b => b is TextColorBlockItem));
@@ -595,7 +595,7 @@ namespace Filtration.Parser.Tests.Services
                               "    SetBackgroundColor 255 20 100";
 
             // Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>());
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, _testUtility.MockItemFilterScript);
 
             // Assert
             Assert.AreEqual(1, result.BlockItems.Count(b => b is BackgroundColorBlockItem));
@@ -614,7 +614,7 @@ namespace Filtration.Parser.Tests.Services
                               "    SetBorderColor 255 20 100";
 
             // Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>());
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, _testUtility.MockItemFilterScript);
 
             // Assert
             Assert.AreEqual(1, result.BlockItems.Count(b => b is BorderColorBlockItem));
@@ -633,8 +633,8 @@ namespace Filtration.Parser.Tests.Services
 
             // Act
 
-            Assert.DoesNotThrow(() => _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>()));
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>());
+            Assert.DoesNotThrow(() => _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, _testUtility.MockItemFilterScript));
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, _testUtility.MockItemFilterScript);
 
             // Assert
             Assert.AreEqual(1, result.BlockItems.Count(b => b is BorderColorBlockItem));
@@ -652,10 +652,9 @@ namespace Filtration.Parser.Tests.Services
                               "    SetTextColor 255 20 100 # Rare Item Text";
             var testComponent = new ThemeComponent(ThemeComponentType.TextColor, "Rare Item Text", new Color { R = 255, G = 20, B = 100});
             var testInputThemeComponentCollection = new ThemeComponentCollection { testComponent };
-            var testInputItemFilterScriptSettings = Mock.Of<IItemFilterScriptSettings>(i => i.ThemeComponentCollection == testInputThemeComponentCollection);
             
             // Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, testInputItemFilterScriptSettings);
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScript>(i => i.ItemFilterScriptSettings.ThemeComponentCollection == testInputThemeComponentCollection));
 
             // Assert
             var blockItem = result.BlockItems.OfType<TextColorBlockItem>().First();
@@ -673,7 +672,7 @@ namespace Filtration.Parser.Tests.Services
                               "    SetFontSize 15";
 
             // Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>());
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, _testUtility.MockItemFilterScript);
 
             // Assert
             Assert.AreEqual(1, result.BlockItems.Count(b => b is FontSizeBlockItem));
@@ -690,7 +689,7 @@ namespace Filtration.Parser.Tests.Services
                               "    PlayAlertSound 4";
 
             // Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>());
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, _testUtility.MockItemFilterScript);
 
             // Assert
             Assert.AreEqual(1, result.BlockItems.Count(b => b is SoundBlockItem));
@@ -708,7 +707,7 @@ namespace Filtration.Parser.Tests.Services
                               "    PlayAlertSound 2 95";
 
             // Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>());
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, _testUtility.MockItemFilterScript);
 
             // Assert
             Assert.AreEqual(1, result.BlockItems.Count(b => b is SoundBlockItem));
@@ -745,7 +744,7 @@ namespace Filtration.Parser.Tests.Services
                               "    PlayAlertSound 3";
 
             // Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>());
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, _testUtility.MockItemFilterScript);
 
             // Assert
             Assert.AreEqual("Test filter with everything", result.Description);
@@ -833,7 +832,7 @@ namespace Filtration.Parser.Tests.Services
                               "    Quality < 17";
 
             // Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>());
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, _testUtility.MockItemFilterScript);
 
             // Assert
             Assert.AreEqual(2, result.BlockItems.Count(b => b is ItemLevelBlockItem));
@@ -862,7 +861,7 @@ namespace Filtration.Parser.Tests.Services
                               "    SetTextColor 255 20 100";
 
             // Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>());
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, _testUtility.MockItemFilterScript);
 
             // Assert
             Assert.AreEqual(1, result.BlockItems.Count(b => b is TextColorBlockItem));
@@ -883,7 +882,7 @@ namespace Filtration.Parser.Tests.Services
                               "    SetFontSize 27" + Environment.NewLine;
 
             // Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>());
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, _testUtility.MockItemFilterScript);
 
             // Assert
             Assert.AreEqual(1, result.BlockItems.Count(b => b is FontSizeBlockItem));
@@ -902,7 +901,7 @@ namespace Filtration.Parser.Tests.Services
                               "    PlayAlertSound 2" + Environment.NewLine;
 
             // Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>());
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, _testUtility.MockItemFilterScript);
 
             // Assert
             Assert.AreEqual(1, result.BlockItems.Count(b => b is SoundBlockItem));
@@ -920,7 +919,7 @@ namespace Filtration.Parser.Tests.Services
                               "    SetBackgroundColor 255 20 100";
 
             // Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>());
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, _testUtility.MockItemFilterScript);
 
             // Assert
             Assert.AreEqual(1, result.BlockItems.Count(b => b is BackgroundColorBlockItem));
@@ -939,7 +938,7 @@ namespace Filtration.Parser.Tests.Services
                               "    SetBorderColor 255 20 100";
 
             // Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>());
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, _testUtility.MockItemFilterScript);
 
             // Assert
             Assert.AreEqual(1, result.BlockItems.Count(b => b is BorderColorBlockItem));
@@ -967,7 +966,7 @@ namespace Filtration.Parser.Tests.Services
             _testUtility.TestBlock.BlockItems.Add(new WidthBlockItem(FilterPredicateOperator.Equal, 4));
 
             // Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>());
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, _testUtility.MockItemFilterScript);
 
             // Assert
             Assert.AreEqual(1, result.BlockItems.Count(b => b is RarityBlockItem));
@@ -994,7 +993,7 @@ namespace Filtration.Parser.Tests.Services
             _testUtility.TestBlock.BlockItems.Add(new WidthBlockItem(FilterPredicateOperator.Equal, 4));
 
             // Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>());
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, _testUtility.MockItemFilterScript);
 
             // Assert
             Assert.AreEqual(1, result.BlockItems.Count(b => b is ActionBlockItem));
@@ -1029,7 +1028,7 @@ namespace Filtration.Parser.Tests.Services
             _testUtility.TestBlock.BlockItems.Add(new WidthBlockItem(FilterPredicateOperator.Equal, 4));
 
             // Act
-            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, Mock.Of<IItemFilterScriptSettings>());
+            var result = _testUtility.Translator.TranslateStringToItemFilterBlock(inputString, _testUtility.MockItemFilterScript);
 
             // Assert
             Assert.AreEqual(1, result.BlockItems.Count(b => b is ActionBlockItem));
@@ -1870,6 +1869,7 @@ namespace Filtration.Parser.Tests.Services
 
                 // Mock setups
                 MockBlockGroupHierarchyBuilder = new Mock<IBlockGroupHierarchyBuilder>();
+                MockItemFilterScript = Mock.Of<IItemFilterScript>(i => i.ItemFilterScriptSettings.ThemeComponentCollection == new ThemeComponentCollection());
 
                 // Class under test instantiation
                 Translator = new ItemFilterBlockTranslator(MockBlockGroupHierarchyBuilder.Object);
@@ -1878,6 +1878,8 @@ namespace Filtration.Parser.Tests.Services
             public ItemFilterBlock TestBlock { get; set; }
             public Mock<IBlockGroupHierarchyBuilder> MockBlockGroupHierarchyBuilder { get; }
             public ItemFilterBlockTranslator Translator { get; }
+
+            public IItemFilterScript MockItemFilterScript { get; }
         }
     }
 }

Filtration.Parser.Tests/Services/TestItemFilterScriptTranslator.cs

@@ -40,7 +40,7 @@ namespace Filtration.Parser.Tests.Services
 
             // Assert
             Assert.AreEqual(5, script.ItemFilterBlocks.Count);
-            mockItemFilterBlockTranslator.Verify(t => t.TranslateStringToItemFilterBlock(It.IsAny<string>(), It.IsAny<IItemFilterScriptSettings>()));
+            mockItemFilterBlockTranslator.Verify(t => t.TranslateStringToItemFilterBlock(It.IsAny<string>(), It.IsAny<IItemFilterScript>(), false));
         }
 
         [Test]

Filtration.Parser/Services/ItemFilterBlockTranslator.cs

@@ -30,9 +30,9 @@ namespace Filtration.Parser.Services
         }
 
         // Converts a string into an ItemFilterCommentBlock maintaining newlines and spaces but removing # characters
-        public IItemFilterCommentBlock TranslateStringToItemFilterCommentBlock(string inputString)
+        public IItemFilterCommentBlock TranslateStringToItemFilterCommentBlock(string inputString, IItemFilterScript parentItemFilterScript)
         {
-            var itemFilterCommentBlock = new ItemFilterCommentBlock();
+            var itemFilterCommentBlock = new ItemFilterCommentBlock(parentItemFilterScript);
 
             foreach (var line in new LineReader(() => new StringReader(inputString)))
             {
@@ -47,10 +47,15 @@ namespace Filtration.Parser.Services
 
         // This method converts a string into a ItemFilterBlock. This is used for pasting ItemFilterBlocks 
         // and reading ItemFilterScripts from a file.
-        public IItemFilterBlock TranslateStringToItemFilterBlock(string inputString, IItemFilterScriptSettings itemFilterScriptSettings)
+        public IItemFilterBlock TranslateStringToItemFilterBlock(string inputString, IItemFilterScript parentItemFilterScript, bool initialiseBlockGroupHierarchyBuilder = false)
         {
-            _masterComponentCollection = itemFilterScriptSettings.ThemeComponentCollection;
-            var block = new ItemFilterBlock();
+            if (initialiseBlockGroupHierarchyBuilder)
+            {
+                _blockGroupHierarchyBuilder.Initialise(parentItemFilterScript.ItemFilterBlockGroups.First());
+            }
+
+            _masterComponentCollection = parentItemFilterScript.ItemFilterScriptSettings.ThemeComponentCollection;
+            var block = new ItemFilterBlock(parentItemFilterScript);
             var showHideFound = false;
 
             foreach (var line in new LineReader(() => new StringReader(inputString)))
@@ -78,7 +83,7 @@ namespace Filtration.Parser.Services
 
                         // If block groups are enabled for this script, the comment after Show/Hide is parsed as a block
                         // group hierarchy, if block groups are disabled it is preserved as a simple text comment.
-                        if (itemFilterScriptSettings.BlockGroupsEnabled)
+                        if (parentItemFilterScript.ItemFilterScriptSettings.BlockGroupsEnabled)
                         {
                             AddBlockGroupToBlock(block, trimmedLine);
                         }

Filtration.Parser/Services/ItemFilterScriptTranslator.cs

@@ -154,11 +154,11 @@ namespace Filtration.Parser.Services
 
                 if (boundary.Value.BoundaryType == ItemFilterBlockBoundaryType.ItemFilterBlock)
                 {
-                    script.ItemFilterBlocks.Add(_blockTranslator.TranslateStringToItemFilterBlock(blockString, script.ItemFilterScriptSettings));
+                    script.ItemFilterBlocks.Add(_blockTranslator.TranslateStringToItemFilterBlock(blockString, script));
                 }
                 else
                 {
-                    script.ItemFilterBlocks.Add(_blockTranslator.TranslateStringToItemFilterCommentBlock(blockString));
+                    script.ItemFilterBlocks.Add(_blockTranslator.TranslateStringToItemFilterCommentBlock(blockString, script));
                 }
             }
 

Filtration.Tests/Repositories/TestItemFilterScriptRepository.cs

@@ -6,6 +6,7 @@ using Filtration.ObjectModel.Factories;
 using Filtration.Repositories;
 using Filtration.Services;
 using Filtration.ViewModels;
+using Filtration.ViewModels.Factories;
 using FluentAssertions;
 using Moq;
 using NUnit.Framework;

Filtration/Filtration.csproj

@@ -184,11 +184,14 @@
     <Compile Include="Utility\RoutedCommandHandler.cs" />
     <Compile Include="Utility\RoutedCommandHandlers.cs" />
     <Compile Include="ViewModels\AvalonDockWorkspaceViewModel.cs" />
-    <Compile Include="ViewModels\IItemFilterCommentBlockViewModelFactory.cs" />
+    <Compile Include="ViewModels\Factories\IItemFilterCommentBlockViewModelFactory.cs" />
+    <Compile Include="ViewModels\Factories\ItemFilterBlockBaseViewModelFactory.cs" />
+    <Compile Include="ViewModels\ItemFilterBlockViewModelBase.cs" />
+    <Compile Include="ViewModels\ItemFilterCommentBlockViewModel.cs" />
     <Compile Include="ViewModels\SettingsPageViewModel.cs" />
     <Compile Include="ViewModels\ToolPanes\BlockGroupBrowserViewModel.cs" />
-    <Compile Include="ViewModels\IItemFilterScriptViewModelFactory.cs" />
-    <Compile Include="ViewModels\IItemFilterBlockViewModelFactory.cs" />
+    <Compile Include="ViewModels\Factories\IItemFilterScriptViewModelFactory.cs" />
+    <Compile Include="ViewModels\Factories\IItemFilterBlockViewModelFactory.cs" />
     <Compile Include="ViewModels\ItemFilterBlockGroupViewModel.cs" />
     <Compile Include="ViewModels\ItemFilterBlockViewModel.cs" />
     <Compile Include="ViewModels\ItemFilterScriptViewModel.cs" />
@@ -443,6 +446,8 @@
     <Resource Include="Resources\Icons\ThemeComponentDelete.ico" />
     <Resource Include="Resources\Icons\standby_disabled_icon.png" />
     <Resource Include="Resources\Icons\standby_enabled_icon.png" />
+    <Resource Include="Resources\Icons\redo_icon.png" />
+    <Resource Include="Resources\Icons\undo_icon.png" />
     <Content Include="Resources\ItemBaseTypes.txt" />
     <Content Include="Resources\ItemClasses.txt" />
   </ItemGroup>

Filtration/Repositories/ItemFilterScriptRepository.cs

@@ -3,6 +3,7 @@ using Filtration.ObjectModel;
 using Filtration.ObjectModel.Factories;
 using Filtration.Services;
 using Filtration.ViewModels;
+using Filtration.ViewModels.Factories;
 
 namespace Filtration.Repositories
 {

Filtration/ViewModels/Factories/IItemFilterBlockViewModelFactory.cs

@@ -1,4 +1,4 @@
-namespace Filtration.ViewModels
+namespace Filtration.ViewModels.Factories
 {
     internal interface IItemFilterBlockViewModelFactory
     {

Filtration/ViewModels/Factories/IItemFilterCommentBlockViewModelFactory.cs

@@ -1,4 +1,4 @@
-namespace Filtration.ViewModels
+namespace Filtration.ViewModels.Factories
 {
     internal interface IItemFilterCommentBlockViewModelFactory
     {

Filtration/ViewModels/Factories/IItemFilterScriptViewModelFactory.cs

@@ -1,4 +1,4 @@
-namespace Filtration.ViewModels
+namespace Filtration.ViewModels.Factories
 {
     internal interface IItemFilterScriptViewModelFactory
     {

Filtration/ViewModels/Factories/ItemFilterBlockBaseViewModelFactory.cs

@@ -0,0 +1,37 @@
+using System;
+using Filtration.ObjectModel;
+
+namespace Filtration.ViewModels.Factories
+{
+    internal interface IItemFilterBlockBaseViewModelFactory
+    {
+        IItemFilterBlockViewModelBase Create(IItemFilterBlockBase itemFilterBlockBase);
+    }
+
+    internal class ItemFilterBlockBaseViewModelFactory : IItemFilterBlockBaseViewModelFactory
+    {
+        private readonly IItemFilterBlockViewModelFactory _itemFilterBlockViewModelFactory;
+        private readonly IItemFilterCommentBlockViewModelFactory _itemFilterCommentBlockViewModelFactory;
+
+        public ItemFilterBlockBaseViewModelFactory(IItemFilterBlockViewModelFactory itemFilterBlockViewModelFactory,
+                                                   IItemFilterCommentBlockViewModelFactory itemFilterCommentBlockViewModelFactory)
+        {
+            _itemFilterBlockViewModelFactory = itemFilterBlockViewModelFactory;
+            _itemFilterCommentBlockViewModelFactory = itemFilterCommentBlockViewModelFactory;
+        }
+
+        public IItemFilterBlockViewModelBase Create(IItemFilterBlockBase itemFilterBlockBase)
+        {
+            if (itemFilterBlockBase is IItemFilterBlock)
+            {
+                return _itemFilterBlockViewModelFactory.Create();
+            }
+            if (itemFilterBlockBase is IItemFilterCommentBlock)
+            {
+                return _itemFilterCommentBlockViewModelFactory.Create();
+            }
+
+            throw new InvalidOperationException("Unknown IItemFilterBlockBase type");
+        }
+    }
+}

Filtration/ViewModels/ItemFilterBlockViewModel.cs

@@ -9,7 +9,6 @@ using Filtration.ObjectModel.BlockItemBaseTypes;
 using Filtration.ObjectModel.BlockItemTypes;
 using Filtration.Services;
 using Filtration.Views;
-using GalaSoft.MvvmLight;
 using GalaSoft.MvvmLight.CommandWpf;
 using Xceed.Wpf.Toolkit;
 
@@ -17,7 +16,6 @@ namespace Filtration.ViewModels
 {
     internal interface IItemFilterBlockViewModel : IItemFilterBlockViewModelBase
     {
-        void Initialise(IItemFilterBlock itemFilterBlock, ItemFilterScriptViewModel parentScriptViewModel);
         bool IsExpanded { get; set; }
         IItemFilterBlock Block { get; }
         bool BlockEnabled { get; set; }
@@ -25,72 +23,12 @@ namespace Filtration.ViewModels
         void RefreshBlockPreview();
     }
 
-    internal interface IItemFilterBlockViewModelBase
-    {
-        IItemFilterBlockBase BaseBlock { get; }
-        bool IsDirty { get; set; }
-        event EventHandler BlockBecameDirty;
-    }
-
-    internal abstract class ItemFilterBlockViewModelBase : ViewModelBase, IItemFilterBlockViewModelBase
-    {
-        private bool _isDirty;
-
-        protected void Initialise(IItemFilterBlockBase itemfilterBlock)
-        {
-            BaseBlock = itemfilterBlock;
-        }
-
-
-        public event EventHandler BlockBecameDirty;
-
-        public IItemFilterBlockBase BaseBlock { get; protected set; }
-        
-        public bool IsDirty
-        {
-            get => _isDirty;
-            set
-            {
-                if (value != _isDirty)
-                {
-                    _isDirty = value;
-                    RaisePropertyChanged();
-                    BlockBecameDirty?.Invoke(this, EventArgs.Empty);
-                }
-            }
-        }
-    }
-
-    internal interface IItemFilterCommentBlockViewModel : IItemFilterBlockViewModelBase
-    {
-        void Initialise(IItemFilterCommentBlock itemFilterCommentBlock);
-        IItemFilterCommentBlock ItemFilterCommentBlock { get; }
-        string Comment { get; }
-    }
-
-    internal class ItemFilterCommentBlockViewModel : ItemFilterBlockViewModelBase, IItemFilterCommentBlockViewModel
-    {
-        public ItemFilterCommentBlockViewModel()
-        {
-        }
-
-        public void Initialise(IItemFilterCommentBlock itemFilterCommentBlock)
-        {
-            ItemFilterCommentBlock = itemFilterCommentBlock;
-            BaseBlock = itemFilterCommentBlock;
-        }
-
-        public IItemFilterCommentBlock ItemFilterCommentBlock { get; private set; }
-
-        public string Comment => ItemFilterCommentBlock.Comment;
-    }
-
     internal class ItemFilterBlockViewModel : ItemFilterBlockViewModelBase, IItemFilterBlockViewModel
     {
         private readonly IStaticDataService _staticDataService;
         private readonly IReplaceColorsViewModel _replaceColorsViewModel;
         private readonly MediaPlayer _mediaPlayer = new MediaPlayer();
-        private ItemFilterScriptViewModel _parentScriptViewModel;
+        private IItemFilterScriptViewModel _parentScriptViewModel;
 
         private bool _displaySettingsPopupOpen;
         private bool _isExpanded;
@@ -120,8 +58,9 @@ namespace Filtration.ViewModels
             PlaySoundCommand = new RelayCommand(OnPlaySoundCommand, () => HasSound);
         }
 
-        public void Initialise(IItemFilterBlock itemFilterBlock, ItemFilterScriptViewModel parentScriptViewModel)
+        public override void Initialise(IItemFilterBlockBase itemFilterBlockBase, IItemFilterScriptViewModel parentScriptViewModel)
         {
+            var itemFilterBlock = itemFilterBlockBase as IItemFilterBlock;
             if (itemFilterBlock == null || parentScriptViewModel == null)
             {
                 throw new ArgumentNullException(nameof(itemFilterBlock));
@@ -139,7 +78,7 @@ namespace Filtration.ViewModels
             }
 
 
-            base.Initialise(itemFilterBlock);
+            base.Initialise(itemFilterBlock, parentScriptViewModel);
         }
 
         public RelayCommand CopyBlockCommand { get; }
@@ -350,7 +289,7 @@ namespace Filtration.ViewModels
 
         private void OnAddSectionCommand()
         {
-            _parentScriptViewModel.AddSection(this);
+            _parentScriptViewModel.AddCommentBlock(this);
         }
 
         private void OnDeleteBlockCommand()

Filtration/ViewModels/ItemFilterBlockViewModelBase.cs

@@ -0,0 +1,42 @@
+using System;
+using Filtration.ObjectModel;
+using GalaSoft.MvvmLight;
+
+namespace Filtration.ViewModels
+{
+    internal interface IItemFilterBlockViewModelBase
+    {
+        void Initialise(IItemFilterBlockBase itemfilterBlock, IItemFilterScriptViewModel itemFilterScriptViewModel);
+        IItemFilterBlockBase BaseBlock { get; }
+        bool IsDirty { get; set; }
+        event EventHandler BlockBecameDirty;
+    }
+
+    internal abstract class ItemFilterBlockViewModelBase : ViewModelBase, IItemFilterBlockViewModelBase
+    {
+        private bool _isDirty;
+
+        public virtual void Initialise(IItemFilterBlockBase itemfilterBlock, IItemFilterScriptViewModel itemFilterScriptViewModel)
+        {
+            BaseBlock = itemfilterBlock;
+        }
+
+        public event EventHandler BlockBecameDirty;
+
+        public IItemFilterBlockBase BaseBlock { get; protected set; }
+        
+        public bool IsDirty
+        {
+            get => _isDirty;
+            set
+            {
+                if (value != _isDirty)
+                {
+                    _isDirty = value;
+                    RaisePropertyChanged();
+                    BlockBecameDirty?.Invoke(this, EventArgs.Empty);
+                }
+            }
+        }
+    }
+}

Filtration/ViewModels/ItemFilterCommentBlockViewModel.cs

@@ -0,0 +1,29 @@
+using Filtration.ObjectModel;
+
+namespace Filtration.ViewModels
+{
+    internal interface IItemFilterCommentBlockViewModel : IItemFilterBlockViewModelBase
+    {
+        IItemFilterCommentBlock ItemFilterCommentBlock { get; }
+        string Comment { get; }
+    }
+
+    internal class ItemFilterCommentBlockViewModel : ItemFilterBlockViewModelBase, IItemFilterCommentBlockViewModel
+    {
+        public ItemFilterCommentBlockViewModel()
+        {
+        }
+
+        public override void Initialise(IItemFilterBlockBase itemfilterBlock, IItemFilterScriptViewModel itemFilterScriptViewModel)
+        {
+            ItemFilterCommentBlock = itemfilterBlock as IItemFilterCommentBlock;
+            BaseBlock = ItemFilterCommentBlock;
+
+            base.Initialise(itemfilterBlock, itemFilterScriptViewModel);
+        }
+
+        public IItemFilterCommentBlock ItemFilterCommentBlock { get; private set; }
+
+        public string Comment => ItemFilterCommentBlock.Comment;
+    }
+}

Filtration/ViewModels/ItemFilterScriptViewModel.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
+using System.Collections.Specialized;
 using System.ComponentModel;
 using System.Diagnostics;
 using System.IO;
@@ -15,8 +16,11 @@ using Filtration.Common.ViewModels;
 using Filtration.Interface;
 using Filtration.ObjectModel;
 using Filtration.ObjectModel.BlockItemBaseTypes;
+using Filtration.ObjectModel.Commands;
+using Filtration.ObjectModel.Commands.ItemFilterScript;
 using Filtration.Parser.Interface.Services;
 using Filtration.Services;
+using Filtration.ViewModels.Factories;
 using GalaSoft.MvvmLight.CommandWpf;
 using GalaSoft.MvvmLight.Messaging;
 using NLog;
@@ -59,21 +63,25 @@ namespace Filtration.ViewModels
         RelayCommand<bool> ToggleShowAdvancedCommand { get; }
         RelayCommand ClearFilterCommand { get; }
 
-        void AddSection(IItemFilterBlockViewModelBase targetBlockViewModel);
+        void AddCommentBlock(IItemFilterBlockViewModelBase targetBlockViewModel);
         void AddBlock(IItemFilterBlockViewModelBase targetBlockViewModel);
         void CopyBlock(IItemFilterBlockViewModelBase targetBlockViewModel);
         void CopyBlockStyle(IItemFilterBlockViewModel targetBlockViewModel);
         void PasteBlock(IItemFilterBlockViewModelBase targetBlockViewModel);
         void PasteBlockStyle(IItemFilterBlockViewModel targetBlockViewModel);
+        void DeleteBlock(IItemFilterBlockViewModelBase targetBlockViewModelBase);
+        void MoveBlockToTop(IItemFilterBlockViewModelBase targetBlockViewModelBase);
+        void MoveBlockUp(IItemFilterBlockViewModelBase targetBlockViewModelBase);
+        void MoveBlockDown(IItemFilterBlockViewModelBase targetBlockViewModelBase);
+        void MoveBlockToBottom(IItemFilterBlockViewModelBase targetBlockViewModelBase);
     }
 
     internal class ItemFilterScriptViewModel : PaneViewModel, IItemFilterScriptViewModel
     {
         private static readonly Logger Logger = LogManager.GetCurrentClassLogger();
 
-        private readonly IItemFilterBlockViewModelFactory _itemFilterBlockViewModelFactory;
+        private readonly IItemFilterBlockBaseViewModelFactory _itemFilterBlockBaseViewModelFactory;
         private readonly IItemFilterBlockTranslator _blockTranslator;
-        private readonly IItemFilterCommentBlockViewModelFactory _itemFilterCommentBlockViewModelFactory;
         private readonly IAvalonDockWorkspaceViewModel _avalonDockWorkspaceViewModel;
         private readonly IItemFilterPersistenceService _persistenceService;
         private readonly IMessageBoxService _messageBoxService;
@@ -86,19 +94,18 @@ namespace Filtration.ViewModels
         private readonly ObservableCollection<IItemFilterBlockViewModelBase> _itemFilterBlockViewModels;
         private ICollectionView _itemFilterBlockViewModelsCollectionView;
         private Predicate<IItemFilterBlockViewModel> _blockFilterPredicate;
+        private ICommandManager _scriptCommandManager;
 
-        public ItemFilterScriptViewModel(IItemFilterBlockViewModelFactory itemFilterBlockViewModelFactory,
+        public ItemFilterScriptViewModel(IItemFilterBlockBaseViewModelFactory itemFilterBlockBaseViewModelFactory,
                                          IItemFilterBlockTranslator blockTranslator,
-                                         IItemFilterCommentBlockViewModelFactory itemFilterCommentBlockViewModelFactory,
                                          IAvalonDockWorkspaceViewModel avalonDockWorkspaceViewModel,
                                          IItemFilterPersistenceService persistenceService,
                                          IMessageBoxService messageBoxService,
                                          IClipboardService clipboardService,
                                          IBlockGroupHierarchyBuilder blockGroupHierarchyBuilder)
         {
-            _itemFilterBlockViewModelFactory = itemFilterBlockViewModelFactory;
+            _itemFilterBlockBaseViewModelFactory = itemFilterBlockBaseViewModelFactory;
             _blockTranslator = blockTranslator;
-            _itemFilterCommentBlockViewModelFactory = itemFilterCommentBlockViewModelFactory;
             _avalonDockWorkspaceViewModel = avalonDockWorkspaceViewModel;
             _avalonDockWorkspaceViewModel.ActiveDocumentChanged += OnActiveDocumentChanged;
             _persistenceService = persistenceService;
@@ -116,12 +123,12 @@ namespace Filtration.ViewModels
             ClearFilterCommand = new RelayCommand(OnClearFilterCommand, () => BlockFilterPredicate != null);
             CloseCommand = new RelayCommand(async () => await OnCloseCommand());
             DeleteBlockCommand = new RelayCommand(OnDeleteBlockCommand, () => SelectedBlockViewModel != null);
-            MoveBlockToTopCommand = new RelayCommand(OnMoveBlockToTopCommand, () => SelectedBlockViewModel != null);
-            MoveBlockUpCommand = new RelayCommand(OnMoveBlockUpCommand, () => SelectedBlockViewModel != null);
-            MoveBlockDownCommand = new RelayCommand(OnMoveBlockDownCommand, () => SelectedBlockViewModel != null);
-            MoveBlockToBottomCommand = new RelayCommand(OnMoveBlockToBottomCommand, () => SelectedBlockViewModel != null);
+            MoveBlockToTopCommand = new RelayCommand(OnMoveBlockToTopCommand, () => SelectedBlockViewModel != null && ItemFilterBlockViewModels.IndexOf(SelectedBlockViewModel) > 0);
+            MoveBlockUpCommand = new RelayCommand(OnMoveBlockUpCommand, () => SelectedBlockViewModel != null && ItemFilterBlockViewModels.IndexOf(SelectedBlockViewModel) > 0);
+            MoveBlockDownCommand = new RelayCommand(OnMoveBlockDownCommand, () => SelectedBlockViewModel != null && ItemFilterBlockViewModels.IndexOf(SelectedBlockViewModel) < ItemFilterBlockViewModels.Count);
+            MoveBlockToBottomCommand = new RelayCommand(OnMoveBlockToBottomCommand, () => SelectedBlockViewModel != null && ItemFilterBlockViewModels.IndexOf(SelectedBlockViewModel) < ItemFilterBlockViewModels.Count);
             AddBlockCommand = new RelayCommand(OnAddBlockCommand);
-            AddSectionCommand = new RelayCommand(OnAddSectionCommand, () => SelectedBlockViewModel != null);
+            AddSectionCommand = new RelayCommand(OnAddCommentBlockCommand, () => SelectedBlockViewModel != null);
             DisableBlockCommand = new RelayCommand(OnDisableBlockCommand, HasSelectedEnabledBlock);
             EnableBlockCommand = new RelayCommand(OnEnableBlockCommand, HasSelectedDisabledBlock);
             CopyBlockCommand = new RelayCommand(OnCopyBlockCommand, () => SelectedBlockViewModel != null);
@@ -138,6 +145,94 @@ namespace Filtration.ViewModels
             IconSource = icon;
         }
 
+        public void Initialise(IItemFilterScript itemFilterScript, bool newScript)
+        {
+            ItemFilterBlockViewModels.Clear();
+
+            Script = itemFilterScript;
+            _scriptCommandManager = Script.CommandManager;
+            AddItemFilterBlockViewModels(Script.ItemFilterBlocks, -1);
+            
+            Script.ItemFilterBlocks.CollectionChanged += ItemFilterBlocksOnCollectionChanged;
+
+            _filenameIsFake = newScript;
+
+            if (newScript)
+            {
+                Script.FilePath = "Untitled.filter";
+            }
+            
+            Title = Filename;
+            ContentId = "ScriptContentId";
+        }
+
+        private void ItemFilterBlocksOnCollectionChanged(object sender, NotifyCollectionChangedEventArgs notifyCollectionChangedEventArgs)
+        {
+            switch (notifyCollectionChangedEventArgs.Action)
+            {
+                case NotifyCollectionChangedAction.Add:
+                {
+                    AddItemFilterBlockViewModels(notifyCollectionChangedEventArgs.NewItems.Cast<IItemFilterBlockBase>(), notifyCollectionChangedEventArgs.NewStartingIndex);
+                    break;
+                }
+                case NotifyCollectionChangedAction.Remove:
+                {
+                    RemoveItemFilterBlockviewModels(notifyCollectionChangedEventArgs.OldItems.Cast<IItemFilterBlockBase>());
+                    break;
+                }
+                default:
+                {
+                    Debugger.Break(); // Unhandled NotifyCollectionChangedAction
+                    break;
+                }
+            }
+        }
+
+        private void AddItemFilterBlockViewModels(IEnumerable<IItemFilterBlockBase> itemFilterBlocks, int addAtIndex)
+        {
+            var firstNewViewModel = true;
+
+            foreach (var itemFilterBlock in itemFilterBlocks)
+            {
+                var vm = _itemFilterBlockBaseViewModelFactory.Create(itemFilterBlock);
+                vm.Initialise(itemFilterBlock, this);
+                vm.BlockBecameDirty += OnBlockBecameDirty;
+
+                if (addAtIndex == -1)
+                {
+                    ItemFilterBlockViewModels.Add(vm);
+                }
+                else
+                {
+                    ItemFilterBlockViewModels.Insert(addAtIndex, vm);
+                }
+
+                if (firstNewViewModel)
+                {
+                    SelectedBlockViewModel = vm;
+                    firstNewViewModel = false;
+                }
+            }
+        }
+
+        private void RemoveItemFilterBlockviewModels(IEnumerable<IItemFilterBlockBase> itemFilterBlocks)
+        {
+            foreach (var itemFilterBlock in itemFilterBlocks)
+            {
+                var itemFilterBlockViewModel = ItemFilterBlockViewModels.FirstOrDefault(f => f.BaseBlock == itemFilterBlock);
+                if (itemFilterBlockViewModel == null)
+                {
+                    throw new InvalidOperationException("Item Filter Block removed from model but does not exist in view model!");
+                }
+
+                ItemFilterBlockViewModels.Remove(itemFilterBlockViewModel);
+                if (SelectedBlockViewModel == itemFilterBlockViewModel)
+                {
+                    SelectedBlockViewModel = null;
+                }
+            }
+        }
+
         public RelayCommand<bool> ToggleShowAdvancedCommand { get; }
         public RelayCommand ClearFilterCommand { get; }
         public RelayCommand CloseCommand { get; }
@@ -229,12 +324,7 @@ namespace Filtration.ViewModels
         public string Description
         {
             get => Script.Description;
-            set
-            {
-                Script.Description = value;
-                IsDirty = true;
-                RaisePropertyChanged();
-            }
+            set => _scriptCommandManager.ExecuteCommand(new SetScriptDescriptionCommand(Script, value));
         }
 
         public bool ShowAdvanced
@@ -341,53 +431,6 @@ namespace Filtration.ViewModels
         private bool _filenameIsFake;
         private bool _showAdvanced;
         
-        public void Initialise(IItemFilterScript itemFilterScript, bool newScript)
-        {
-            ItemFilterBlockViewModels.Clear();
-
-            Script = itemFilterScript;
-
-            foreach (var block in Script.ItemFilterBlocks)
-            {
-                var itemFilterBlock = block as IItemFilterBlock;
-                if (itemFilterBlock != null)
-                {
-                    var itemFilterBlockViewModel = _itemFilterBlockViewModelFactory.Create();
-                    itemFilterBlockViewModel.Initialise(itemFilterBlock, this);
-                    itemFilterBlockViewModel.BlockBecameDirty += OnBlockBecameDirty;
-                    ItemFilterBlockViewModels.Add(itemFilterBlockViewModel);
-                    continue;
-                }
-
-                var itemFilterCommentBlock = block as IItemFilterCommentBlock;
-                if (itemFilterCommentBlock == null)
-                {
-                    throw new InvalidOperationException("Unknown item filter block type");
-                }
-
-
-                var itemFilterCommentBlockViewModel = _itemFilterCommentBlockViewModelFactory.Create();
-                itemFilterCommentBlockViewModel.Initialise(itemFilterCommentBlock);
-                itemFilterCommentBlockViewModel.BlockBecameDirty += OnBlockBecameDirty;
-                ItemFilterBlockViewModels.Add(itemFilterCommentBlockViewModel);
-            }
-
-            _filenameIsFake = newScript;
-
-            if (newScript)
-            {
-                Script.FilePath = "Untitled.filter";
-            }
-
-            if (ItemFilterBlockViewModels.Count > 0)
-            {
-                SelectedBlockViewModel = ItemFilterBlockViewModels.First();
-            }
-
-            Title = Filename;
-            ContentId = "ScriptContentId";
-        }
-
         public async Task SaveAsync()
         {
             if (!ValidateScript()) return;
@@ -602,8 +645,7 @@ namespace Filtration.ViewModels
             }
             catch
             {
-                _messageBoxService.Show("Clipboard Error", "Failed to access the clipboard, copy command not completed.",
-                    MessageBoxButton.OK, MessageBoxImage.Error);
+                _messageBoxService.Show("Clipboard Error", "Failed to access the clipboard, copy command not completed.", MessageBoxButton.OK, MessageBoxImage.Error);
             }
         }
 
@@ -671,39 +713,18 @@ namespace Filtration.ViewModels
             {
                 var clipboardText = _clipboardService.GetClipboardText();
                 if (string.IsNullOrEmpty(clipboardText)) return;
-                _blockGroupHierarchyBuilder.Initialise(Script.ItemFilterBlockGroups.First());
                 
-                var translatedBlock = _blockTranslator.TranslateStringToItemFilterBlock(clipboardText, Script.ItemFilterScriptSettings);
+                var translatedBlock = _blockTranslator.TranslateStringToItemFilterBlock(clipboardText, Script, true); // TODO: Doesn't handle pasting comment blocks?
                 if (translatedBlock == null) return;
 
-                var vm = _itemFilterBlockViewModelFactory.Create();
-                vm.Initialise(translatedBlock, this);
-
-                if (ItemFilterBlockViewModels.Count > 0)
-                {
-                    Script.ItemFilterBlocks.Insert(Script.ItemFilterBlocks.IndexOf(targetBlockViewModelBase.BaseBlock) + 1,
-                        translatedBlock);
-                    ItemFilterBlockViewModels.Insert(ItemFilterBlockViewModels.IndexOf(targetBlockViewModelBase) + 1, vm);
-                }
-                else
-                {
-                    Script.ItemFilterBlocks.Add(translatedBlock);
-                    ItemFilterBlockViewModels.Add(vm);
-                }
-
-                vm.BlockBecameDirty += OnBlockBecameDirty;
-
-                SelectedBlockViewModel = vm;
-                IsDirty = true;
+                _scriptCommandManager.ExecuteCommand(new PasteBlockCommand(Script, translatedBlock, targetBlockViewModelBase.BaseBlock));
             }
             catch (Exception e)
             {
                 Logger.Error(e);
                 var innerException = e.InnerException?.Message ?? string.Empty;
 
-                _messageBoxService.Show("Paste Error",
-                    e.Message + Environment.NewLine + innerException, MessageBoxButton.OK,
-                    MessageBoxImage.Error);
+                _messageBoxService.Show("Paste Error", e.Message + Environment.NewLine + innerException, MessageBoxButton.OK, MessageBoxImage.Error);
             }
         }
 
@@ -712,21 +733,6 @@ namespace Filtration.ViewModels
             MoveBlockToTop(SelectedBlockViewModel);
         }
 
-        public void MoveBlockToTop(IItemFilterBlockViewModelBase targetBlockViewModelBase)
-        {
-            var currentIndex = ItemFilterBlockViewModels.IndexOf(targetBlockViewModelBase);
-
-            if (currentIndex > 0)
-            {
-                var block = targetBlockViewModelBase.BaseBlock;
-                Script.ItemFilterBlocks.Remove(block);
-                Script.ItemFilterBlocks.Insert(0, block);
-                ItemFilterBlockViewModels.Move(currentIndex, 0);
-                IsDirty = true;
-                RaisePropertyChanged(nameof(ItemFilterCommentBlockViewModels));
-            }
-        }
-
         private void OnMoveBlockUpCommand()
         {
             MoveBlockUp(SelectedBlockViewModel);
@@ -734,18 +740,7 @@ namespace Filtration.ViewModels
 
         public void MoveBlockUp(IItemFilterBlockViewModelBase targetBlockViewModelBase)
         {
-            var currentIndex = ItemFilterBlockViewModels.IndexOf(targetBlockViewModelBase);
-
-            if (currentIndex > 0)
-            {
-                var block = targetBlockViewModelBase.BaseBlock;
-                var blockPos = Script.ItemFilterBlocks.IndexOf(block);
-                Script.ItemFilterBlocks.RemoveAt(blockPos);
-                Script.ItemFilterBlocks.Insert(blockPos - 1, block);
-                ItemFilterBlockViewModels.Move(currentIndex, currentIndex - 1);
-                IsDirty = true;
-                RaisePropertyChanged(nameof(ItemFilterCommentBlockViewModels));
-            }
+            _scriptCommandManager.ExecuteCommand(new MoveBlockUpCommand(Script, targetBlockViewModelBase?.BaseBlock));
         }
 
         private void OnMoveBlockDownCommand()
@@ -755,18 +750,7 @@ namespace Filtration.ViewModels
 
         public void MoveBlockDown(IItemFilterBlockViewModelBase targetBlockViewModelBase)
         {
-            var currentIndex = ItemFilterBlockViewModels.IndexOf(targetBlockViewModelBase);
-
-            if (currentIndex < ItemFilterBlockViewModels.Count - 1)
-            {
-                var block = targetBlockViewModelBase.BaseBlock;
-                var blockPos = Script.ItemFilterBlocks.IndexOf(block);
-                Script.ItemFilterBlocks.RemoveAt(blockPos);
-                Script.ItemFilterBlocks.Insert(blockPos + 1, block);
-                ItemFilterBlockViewModels.Move(currentIndex, currentIndex + 1);
-                IsDirty = true;
-                RaisePropertyChanged(nameof(ItemFilterCommentBlockViewModels));
-            }
+            _scriptCommandManager.ExecuteCommand(new MoveBlockDownCommand(Script, targetBlockViewModelBase?.BaseBlock));
         }
 
         private void OnMoveBlockToBottomCommand()
@@ -774,21 +758,6 @@ namespace Filtration.ViewModels
             MoveBlockToBottom(SelectedBlockViewModel);
         }
 
-        public void MoveBlockToBottom(IItemFilterBlockViewModelBase targetBlockViewModelBase)
-        {
-            var currentIndex = ItemFilterBlockViewModels.IndexOf(targetBlockViewModelBase);
-
-            if (currentIndex < ItemFilterBlockViewModels.Count - 1)
-            {
-                var block = targetBlockViewModelBase.BaseBlock;
-                Script.ItemFilterBlocks.Remove(block);
-                Script.ItemFilterBlocks.Add(block);
-                ItemFilterBlockViewModels.Move(currentIndex, ItemFilterBlockViewModels.Count - 1);
-                IsDirty = true;
-                RaisePropertyChanged(nameof(ItemFilterCommentBlockViewModels));
-            }
-        }
-
         private void OnAddBlockCommand()
         {
             AddBlock(SelectedBlockViewModel);
@@ -796,25 +765,28 @@ namespace Filtration.ViewModels
 
         public void AddBlock(IItemFilterBlockViewModelBase targetBlockViewModelBase)
         {
-            var vm = _itemFilterBlockViewModelFactory.Create();
-            var newBlock = new ItemFilterBlock();
-            vm.Initialise(newBlock, this);
+            _scriptCommandManager.ExecuteCommand(new AddBlockCommand(Script, targetBlockViewModelBase?.BaseBlock));
+            // TODO: Expand new viewmodel
+        }
 
-            if (targetBlockViewModelBase != null)
-            {
-                Script.ItemFilterBlocks.Insert(Script.ItemFilterBlocks.IndexOf(targetBlockViewModelBase.BaseBlock) + 1, newBlock);
-                ItemFilterBlockViewModels.Insert(ItemFilterBlockViewModels.IndexOf(targetBlockViewModelBase) + 1, vm);
-            }
-            else
-            {
-                Script.ItemFilterBlocks.Add(newBlock);
-                ItemFilterBlockViewModels.Add(vm);
-            }
+        public void AddCommentBlock(IItemFilterBlockViewModelBase targetBlockViewModelBase)
+        {
+            _scriptCommandManager.ExecuteCommand(new AddCommentBlockCommand(Script, targetBlockViewModelBase.BaseBlock));
+        }
 
-            vm.BlockBecameDirty += OnBlockBecameDirty;
-            SelectedBlockViewModel = vm;
-            vm.IsExpanded = true;
-            IsDirty = true;
+        public void DeleteBlock(IItemFilterBlockViewModelBase targetBlockViewModelBase)
+        {
+            _scriptCommandManager.ExecuteCommand(new RemoveBlockCommand(Script, targetBlockViewModelBase.BaseBlock));
+        }
+
+        public void MoveBlockToBottom(IItemFilterBlockViewModelBase targetBlockViewModelBase)
+        {
+            _scriptCommandManager.ExecuteCommand(new MoveBlockToBottomCommand(Script, targetBlockViewModelBase.BaseBlock));
+        }
+
+        public void MoveBlockToTop(IItemFilterBlockViewModelBase targetBlockViewModelBase)
+        {
+            _scriptCommandManager.ExecuteCommand(new MoveBlockToTopCommand(Script, targetBlockViewModelBase.BaseBlock));
         }
 
         private void OnBlockBecameDirty(object sender, EventArgs e)
@@ -822,23 +794,9 @@ namespace Filtration.ViewModels
             SetDirtyFlag();
         }
 
-        private void OnAddSectionCommand()
+        private void OnAddCommentBlockCommand()
         {
-            AddSection(SelectedBlockViewModel);
-        }
-        
-        public void AddSection(IItemFilterBlockViewModelBase targetBlockViewModelBase)
-        {
-            var vm = _itemFilterCommentBlockViewModelFactory.Create();
-            var newSection = new ItemFilterCommentBlock { Comment = "New Comment Block" };
-            vm.Initialise(newSection);
-
-            Script.ItemFilterBlocks.Insert(Script.ItemFilterBlocks.IndexOf(targetBlockViewModelBase.BaseBlock), newSection);
-            ItemFilterBlockViewModels.Insert(ItemFilterBlockViewModels.IndexOf(targetBlockViewModelBase), vm);
-            IsDirty = true;
-            SelectedBlockViewModel = vm;
-            RaisePropertyChanged(nameof(ItemFilterCommentBlockViewModels));
-            Messenger.Default.Send(new NotificationMessage("SectionsChanged"));
+            AddCommentBlock(SelectedBlockViewModel);
         }
 
         private void OnExpandAllBlocksCommand()
@@ -862,31 +820,6 @@ namespace Filtration.ViewModels
             DeleteBlock(SelectedBlockViewModel);
         }
 
-        public void DeleteBlock(IItemFilterBlockViewModelBase targetBlockViewModelBase)
-        {
-            var result = _messageBoxService.Show("Delete Confirmation", "Are you sure you wish to delete this block?",
-                MessageBoxButton.YesNo,
-                MessageBoxImage.Question);
-            
-            if (result == MessageBoxResult.Yes)
-            {
-                var isSection = targetBlockViewModelBase.BaseBlock is ItemFilterCommentBlock;
-
-                Script.ItemFilterBlocks.Remove(targetBlockViewModelBase.BaseBlock);
-                ItemFilterBlockViewModels.Remove(targetBlockViewModelBase);
-                IsDirty = true;
-
-                targetBlockViewModelBase.BlockBecameDirty -= OnBlockBecameDirty;
-
-                if (isSection)
-                {
-                    Messenger.Default.Send(new NotificationMessage("SectionsChanged"));
-                }
-
-            }
-            SelectedBlockViewModel = null;
-        }
-
         private void OnDisableBlockCommand()
         {
             var selectedBlockViewModel = SelectedBlockViewModel as IItemFilterBlockViewModel;

Filtration/ViewModels/MainWindowViewModel.cs

@@ -85,6 +85,11 @@ namespace Filtration.ViewModels
             PasteCommand = new RelayCommand(OnPasteCommand, () => ActiveDocumentIsScript && ActiveScriptHasSelectedBlock);
             PasteBlockStyleCommand = new RelayCommand(OnPasteBlockStyleCommand, () => ActiveDocumentIsScript && ActiveScriptHasSelectedBlock);
 
+            // TODO: Only enabled if undo/redo available
+            UndoCommand = new RelayCommand(OnUndoCommand, () => ActiveDocumentIsScript);
+            RedoCommand = new RelayCommand(OnRedoCommand, () => ActiveDocumentIsScript);
+
+
             MoveBlockUpCommand = new RelayCommand(OnMoveBlockUpCommand, () => ActiveDocumentIsScript && ActiveScriptHasSelectedBlock);
             MoveBlockDownCommand = new RelayCommand(OnMoveBlockDownCommand, () => ActiveDocumentIsScript && ActiveScriptHasSelectedBlock);
             MoveBlockToTopCommand = new RelayCommand(OnMoveBlockToTopCommand, () => ActiveDocumentIsScript && ActiveScriptHasSelectedBlock);
@@ -158,9 +163,7 @@ namespace Filtration.ViewModels
                     }
                     case "OpenScript":
                     {
-#pragma warning disable 4014
-                        Task.Run(OnOpenScriptCommand).GetAwaiter().GetResult();
-#pragma warning restore 4014
+                        OnOpenScriptCommand();
                         break;
                     }
                     case "ShowLoadingBanner":
@@ -191,6 +194,9 @@ namespace Filtration.ViewModels
         public RelayCommand OpenAboutWindowCommand { get; }
         public RelayCommand ReplaceColorsCommand { get; }
 
+        public RelayCommand UndoCommand { get;}
+        public RelayCommand RedoCommand { get; }
+
         public RelayCommand EditMasterThemeCommand { get; }
         public RelayCommand CreateThemeCommand { get; }
         public RelayCommand ApplyThemeToScriptCommand { get; }
@@ -521,6 +527,16 @@ namespace Filtration.ViewModels
             _avalonDockWorkspaceViewModel.ActiveScriptViewModel.PasteBlockStyleCommand.Execute(null);
         }
 
+        private void OnUndoCommand()
+        {
+            _avalonDockWorkspaceViewModel.ActiveScriptViewModel.Script.CommandManager.Undo();
+        }
+
+        private void OnRedoCommand()
+        {
+            _avalonDockWorkspaceViewModel.ActiveScriptViewModel.Script.CommandManager.Redo();
+        }
+
         private void OnNewScriptCommand()
         {
             var newViewModel = _itemFilterScriptRepository.NewScript();

Filtration/Views/IconsDictionary.xaml

@@ -30,6 +30,8 @@
     <Image Source="/Filtration;component/Resources/Icons/PasteStyle.ico" x:Key="PasteStyleIcon" x:Shared="False" />
     <Image Source="/Filtration;component/Resources/Icons/filtration_icon.png" x:Key="FiltrationIcon" x:Shared="False" />
     <Image Source="/Filtration;component/Resources/Icons/Add.ico" x:Key="AddIcon" x:Shared="False" />
+    <Image Source="/Filtration;component/Resources/Icons/undo_icon.png" x:Key="UndoIcon" x:Shared="False" />
+    <Image Source="/Filtration;component/Resources/Icons/redo_icon.png" x:Key="RedoIcon" x:Shared="False" />
     <Image Source="/Filtration;component/Resources/Icons/ThemeComponentDelete.ico" x:Key="ThemeComponentDeleteIcon" x:Shared="False" />
     <Image Source="/Filtration;component/Resources/Icons/standby_enabled_icon.png" x:Key="StandbyEnabledIcon" x:Shared="False" />
     <Image Source="/Filtration;component/Resources/Icons/standby_disabled_icon.png" x:Key="StandbyDisabledIcon" x:Shared="False" />

Filtration/Views/MainWindow.xaml

@@ -19,6 +19,10 @@
         <KeyBinding Command="{Binding SaveCommand}" Modifiers="Control" Key="S" />
         <KeyBinding Command="{Binding OpenScriptCommand}" Modifiers="Control" Key="O" />
         <KeyBinding Command="{Binding NewScriptCommand}" Modifiers="Control" Key="N" />
+        
+        <!-- Undo/Redo support incomplete -->
+        <!--<KeyBinding Command="{Binding UndoCommand}" Modifiers="Control" Key="Z" />
+        <KeyBinding Command="{Binding RedoCommand}" Modifiers="Control" Key="Y" />-->
     </fluent:RibbonWindow.InputBindings>
     <utility:RoutedCommandHandlers.Commands>
         <utility:RoutedCommandHandler RoutedCommand="{StaticResource OpenScriptRoutedCommand}" Command="{Binding OpenScriptCommand}" />
@@ -32,7 +36,7 @@
                             <fluent:BackstageTabItem.ContentTemplate>
                                 <DataTemplate>
                                     <StackPanel>
-                                    <TextBlock Margin="20">Recent Documents will go here in a future release.</TextBlock>
+                                        <TextBlock Margin="20">Recent Documents will go here in a future release.</TextBlock>
                                     </StackPanel>
                                 </DataTemplate>
                             </fluent:BackstageTabItem.ContentTemplate>
@@ -85,6 +89,12 @@
                     <fluent:Button Header="Paste Style" Command="{Binding PasteBlockStyleCommand}" Icon="{StaticResource PasteStyleIcon}" LargeIcon="{StaticResource PasteIcon}" SizeDefinition="Middle" ToolTip="Paste Style (Ctrl+Shift+V)" />
                     <fluent:Button Header="Copy Script" Command="{Binding CopyScriptCommand}" Icon="{StaticResource CopyIcon}" LargeIcon="{StaticResource PasteIcon}" SizeDefinition="Middle" />
                 </fluent:RibbonGroupBox>
+
+                <!-- Undo/Redo support incomplete -->
+                <!--<fluent:RibbonGroupBox Header="Undo">
+                    <fluent:Button Header="Undo" Command="{Binding UndoCommand}"  ToolTip="Undo" SizeDefinition="Middle" Icon="{StaticResource UndoIcon}" />
+                    <fluent:Button Header="Redo" Command="{Binding RedoCommand}" ToolTip="Redo" SizeDefinition="Middle" Icon="{StaticResource RedoIcon}" />
+                </fluent:RibbonGroupBox>-->
                 <fluent:RibbonGroupBox Header="Blocks">
                     <fluent:Button Header="Add Block" Command="{Binding AddBlockCommand}" SizeDefinition="Middle" Icon="{StaticResource AddBlockIcon}" />
                     <fluent:Button Header="Add Section" Command="{Binding AddSectionCommand}" SizeDefinition="Middle" Icon="{StaticResource AddSectionIcon}" />

Filtration/WindsorInstallers/ViewModelsInstaller.cs

@@ -3,6 +3,7 @@ using Castle.MicroKernel.Registration;
 using Castle.MicroKernel.SubSystems.Configuration;
 using Castle.Windsor;
 using Filtration.ViewModels;
+using Filtration.ViewModels.Factories;
 using Filtration.ViewModels.ToolPanes;
 
 namespace Filtration.WindsorInstallers
@@ -79,6 +80,11 @@ namespace Filtration.WindsorInstallers
 
             container.Register(
                 Component.For<IItemFilterScriptViewModelFactory>().AsFactory());
+            
+            container.Register(
+                Component.For<IItemFilterBlockBaseViewModelFactory>()
+                    .ImplementedBy<ItemFilterBlockBaseViewModelFactory>()
+                    .LifeStyle.Singleton);
         }
     }
 }