Filters: restore correct escape value

1.3.0

.github/workflows/build-and-test.yml

@@ -31,7 +31,7 @@ jobs:
       working-directory: ./Sources
       run: |
         msbuild $env:Solution_Name /t:Restore /p:Configuration=$env:Configuration
-        
+
     # Build package and upload to github packages
     - name: Build package
       working-directory: ./Sources
@@ -39,7 +39,7 @@ jobs:
         dotnet nuget add source --username Difegue --password ${{ secrets.GITHUB_TOKEN }} --store-password-in-clear-text --name github "https://nuget.pkg.github.com/Difegue/index.json"
         dotnet build $env:Solution_Name --configuration $env:Configuration
         dotnet pack --configuration $env:Configuration -o ./ 
-        dotnet nuget push *.nupkg  --api-key ${{ secrets.GITHUB_TOKEN }} --source "github"
+        dotnet nuget push *.nupkg  --api-key ${{ secrets.GITHUB_TOKEN }} --source "github" --skip-duplicate
 
     # Execute all unit tests in the solution
     #- name: Execute unit tests

Sources/MpcNET/Commands/Database/FindAndSearchCommands.cs

@@ -10,11 +10,12 @@ namespace MpcNET.Commands.Database
     using System.Linq;
     using MpcNET.Tags;
     using MpcNET.Types;
+    using MpcNET.Types.Filters;
 
     /// <summary>
     /// Finds songs in the database that contain "searchText".
     /// Since MPD 0.21, search syntax is now (TAG == 'VALUE').
-    /// https://www.musicpd.org/doc/html/protocol.html#filters
+    /// https://mpd.readthedocs.io/en/stable/protocol.html#filters
     /// </summary>
     public class SearchCommand : BaseFilterCommand
     {
@@ -22,16 +23,12 @@ namespace MpcNET.Commands.Database
         /// 
         /// </summary>
         public override string CommandName => "search";
-        /// <summary>
-        /// 
-        /// </summary>
-        public override string Operand => "contains";
 
         /// <summary>
         /// Initializes a new instance of the <see cref="SearchCommand"/> class.
         /// </summary>
         /// <param name="tag">The tag.</param>
-        /// <param name="searchText">The search text.</param>        
+        /// <param name="searchText">The search text.</param>
         /// <param name="windowStart">Start of the portion of the results desired</param>
         /// <param name="windowEnd">End of the portion of the results desired</param>
         public SearchCommand(ITag tag, string searchText, int windowStart = -1, int windowEnd = -1) : base(tag, searchText, windowStart, windowEnd) { }
@@ -44,12 +41,28 @@ namespace MpcNET.Commands.Database
         /// <param name="windowEnd">End of the portion of the results desired</param>
         public SearchCommand(List<KeyValuePair<ITag, string>> filters, int windowStart = -1, int windowEnd = -1) : base(filters, windowStart, windowEnd) { }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="SearchCommand"/> class.
+        /// </summary>
+        /// <param name="filter">Filter</param>
+        /// <param name="windowStart">Start of the portion of the results desired</param>
+        /// <param name="windowEnd">End of the portion of the results desired</param>
+        public SearchCommand(IFilter filter, int windowStart = -1, int windowEnd = -1) : base(filter, windowStart, windowEnd) { }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="SearchCommand"/> class.
+        /// </summary>
+        /// <param name="filters">List of filters</param>
+        /// <param name="windowStart">Start of the portion of the results desired</param>
+        /// <param name="windowEnd">End of the portion of the results desired</param>
+        public SearchCommand(List<IFilter> filters, int windowStart = -1, int windowEnd = -1) : base(filters, windowStart, windowEnd) { }
+
     }
 
     /// <summary>
     /// Finds songs in the database that contain "searchText" and adds them to the queue.
     /// Since MPD 0.21, search syntax is now (TAG == 'VALUE').
-    /// https://www.musicpd.org/doc/html/protocol.html#filters
+    /// https://mpd.readthedocs.io/en/stable/protocol.html#filters
     /// </summary>
     public class SearchAddCommand : BaseFilterCommand
     {
@@ -57,13 +70,9 @@ namespace MpcNET.Commands.Database
         /// 
         /// </summary>
         public override string CommandName => "searchadd";
-        /// <summary>
-        /// 
-        /// </summary>
-        public override string Operand => "contains";
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="SearchCommand"/> class.
+        /// Initializes a new instance of the <see cref="SearchAddCommand"/> class.
         /// </summary>
         /// <param name="tag">The tag.</param>
         /// <param name="searchText">The search text.</param>        
@@ -72,19 +81,34 @@ namespace MpcNET.Commands.Database
         public SearchAddCommand(ITag tag, string searchText, int windowStart = -1, int windowEnd = -1) : base(tag, searchText, windowStart, windowEnd) { }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="SearchCommand"/> class.
+        /// Initializes a new instance of the <see cref="SearchAddCommand"/> class.
         /// </summary>
         /// <param name="filters">List of key/value filters</param>
         /// <param name="windowStart">Start of the portion of the results desired</param>
         /// <param name="windowEnd">End of the portion of the results desired</param>
         public SearchAddCommand(List<KeyValuePair<ITag, string>> filters, int windowStart = -1, int windowEnd = -1) : base(filters, windowStart, windowEnd) { }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="SearchAddCommand"/> class.
+        /// </summary>
+        /// <param name="filter">Filter</param>
+        /// <param name="windowStart">Start of the portion of the results desired</param>
+        /// <param name="windowEnd">End of the portion of the results desired</param>
+        public SearchAddCommand(IFilter filter, int windowStart = -1, int windowEnd = -1) : base(filter, windowStart, windowEnd) { }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="SearchAddCommand"/> class.
+        /// </summary>
+        /// <param name="filters">List of filters</param>
+        /// <param name="windowStart">Start of the portion of the results desired</param>
+        /// <param name="windowEnd">End of the portion of the results desired</param>
+        public SearchAddCommand(List<IFilter> filters, int windowStart = -1, int windowEnd = -1) : base(filters, windowStart, windowEnd) { }
     }
 
     /// <summary>
     /// Finds songs in the database that is exactly "searchText".
     /// Since MPD 0.21, search syntax is now (TAG == 'VALUE').
-    /// https://www.musicpd.org/doc/html/protocol.html#filters
+    /// https://mpd.readthedocs.io/en/stable/protocol.html#filters
     /// </summary>
     public class FindCommand : BaseFilterCommand
     {
@@ -92,10 +116,6 @@ namespace MpcNET.Commands.Database
         /// 
         /// </summary>
         public override string CommandName => "find";
-        /// <summary>
-        /// 
-        /// </summary>
-        public override string Operand => "==";
 
         /// <summary>
         /// Initializes a new instance of the <see cref="FindCommand"/> class.
@@ -114,15 +134,30 @@ namespace MpcNET.Commands.Database
         /// <param name="windowEnd">End of the portion of the results desired</param>
         public FindCommand(List<KeyValuePair<ITag, string>> filters, int windowStart = -1, int windowEnd = -1) : base(filters, windowStart, windowEnd) { }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="FindCommand"/> class.
+        /// </summary>
+        /// <param name="filter">Filter</param>
+        /// <param name="windowStart">Start of the portion of the results desired</param>
+        /// <param name="windowEnd">End of the portion of the results desired</param>
+        public FindCommand(IFilter filter, int windowStart = -1, int windowEnd = -1) : base(filter, windowStart, windowEnd) { }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="FindCommand"/> class.
+        /// </summary>
+        /// <param name="filters">List of filters</param>
+        /// <param name="windowStart">Start of the portion of the results desired</param>
+        /// <param name="windowEnd">End of the portion of the results desired</param>
+        public FindCommand(List<IFilter> filters, int windowStart = -1, int windowEnd = -1) : base(filters, windowStart, windowEnd) { }
+
     }
 
-   
     /// <summary>
     /// Base class for find/search commands.
     /// </summary>
     public abstract class BaseFilterCommand : IMpcCommand<IEnumerable<IMpdFile>>
     {
-        private readonly List<KeyValuePair<ITag, string>> filters;
+        private readonly List<IFilter> _filters;
         private readonly int _start;
         private readonly int _end;
 
@@ -130,11 +165,6 @@ namespace MpcNET.Commands.Database
         /// Name of the command to use when deserializing
         /// </summary>
         public abstract string CommandName { get; }
-        /// <summary>
-        /// Operand to use between tags and search text. Can be ==, !=, contains...
-        /// </summary>
-        public abstract string Operand { get; }
-
 
         /// <summary>
         /// Initializes a new instance of the <see cref="BaseFilterCommand"/> class.
@@ -143,10 +173,12 @@ namespace MpcNET.Commands.Database
         /// <param name="searchText">The search text.</param>
         /// <param name="windowStart">Start of the portion of the results desired</param>
         /// <param name="windowEnd">End of the portion of the results desired</param>
-        public BaseFilterCommand(ITag tag, string searchText, int windowStart = -1, int windowEnd = -1)
+        /// <param name="operand">Operator of the filter</param>
+        public BaseFilterCommand(ITag tag, string searchText, int windowStart = -1, int windowEnd = -1, FilterOperator operand = FilterOperator.Equal)
         {
-            this.filters = new List<KeyValuePair<ITag, string>>();
-            this.filters.Add(new KeyValuePair<ITag, string>(tag, searchText));
+            _filters = new List<IFilter>();
+            FilterTag Tag = new FilterTag(tag, searchText, operand);
+            _filters.Add(Tag);
 
             _start = windowStart;
             _end = windowEnd;
@@ -158,9 +190,40 @@ namespace MpcNET.Commands.Database
         /// <param name="filters">List of key/value filters</param>
         /// <param name="windowStart">Start of the portion of the results desired</param>
         /// <param name="windowEnd">End of the portion of the results desired</param>
-        public BaseFilterCommand(List<KeyValuePair<ITag, string>> filters, int windowStart = -1, int windowEnd = -1)
+        /// <param name="operand">Operator of the filter</param>
+        public BaseFilterCommand(List<KeyValuePair<ITag, string>> filters, int windowStart = -1, int windowEnd = -1, FilterOperator operand = FilterOperator.Equal)
         {
-            this.filters = filters;
+            _filters = new List<IFilter>();
+            _filters.AddRange(filters.Select(filter => new FilterTag(filter.Key, filter.Value, operand)).ToList());
+
+            _start = windowStart;
+            _end = windowEnd;
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="BaseFilterCommand"/> class.
+        /// </summary>
+        /// <param name="filters">Filter</param>
+        /// <param name="windowStart">Start of the portion of the results desired</param>
+        /// <param name="windowEnd">End of the portion of the results desired</param>
+        public BaseFilterCommand(IFilter filters, int windowStart = -1, int windowEnd = -1)
+        {
+            _filters = new List<IFilter>();
+            _filters.Add(filters);
+
+            _start = windowStart;
+            _end = windowEnd;
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="BaseFilterCommand"/> class.
+        /// </summary>
+        /// <param name="filters">List of filters</param>
+        /// <param name="windowStart">Start of the portion of the results desired</param>
+        /// <param name="windowEnd">End of the portion of the results desired</param>
+        public BaseFilterCommand(List<IFilter> filters, int windowStart = -1, int windowEnd = -1)
+        {
+            _filters = filters;
 
             _start = windowStart;
             _end = windowEnd;
@@ -170,16 +233,19 @@ namespace MpcNET.Commands.Database
         /// Serializes the command.
         /// </summary>
         /// <returns>
-        /// The serialize command.
+        /// The serialized command.
         /// </returns>
         public string Serialize()
         {
-            var cmd =
-            CommandName + " \"(" +
-            string.Join(" AND ",
-                  filters.Select(x => $"({x.Key.Value} {Operand} {escape(x.Value)})")
-                  ) +
-            ")\"";
+            string cmd = "";
+
+            if (_filters != null)
+            {
+                var serializedFilters = string.Join(" AND ",
+                    _filters.Select(x => $"{x.GetFormattedCommand()}")
+                );
+                cmd = $@"{CommandName} ""({serializedFilters})""";
+            }
 
             if (_start > -1)
             {
@@ -200,8 +266,6 @@ namespace MpcNET.Commands.Database
         {
             return MpdFile.CreateList(response.ResponseValues);
         }
-
-        private string escape(string value) => string.Format("\\\"{0}\\\"", value.Replace("\\", "\\\\\\").Replace("'", "\\\\'").Replace("\"", "\\\\\\\""));
     }
     // TODO: rescan
 }

Sources/MpcNET/Commands/Playback/ConsumeCommand.cs

@@ -0,0 +1,64 @@
+// --------------------------------------------------------------------------------------------------------------------
+// <copyright file="ConsumeCommand.cs" company="MpcNET">
+// Copyright (c) MpcNET. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+// </copyright>
+// --------------------------------------------------------------------------------------------------------------------
+namespace MpcNET.Commands.Playback
+{
+    using System.Collections.Generic;
+
+    /// <summary>
+    /// Command to set consume state. 
+    /// Sets consume state to STATE, STATE should be 0 or 1. When consume is activated, each song played is removed from playlist.
+    /// https://mpd.readthedocs.io/en/stable/protocol.html#playback-options
+    /// </summary>
+    public class ConsumeCommand : IMpcCommand<string>
+    {
+        private readonly string single;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="ConsumeCommand" /> class.
+        /// </summary>
+        /// <param name="single">if set to <c>true</c> [consume].</param>
+        public ConsumeCommand(bool single)
+        {
+            this.single = single ? "1" : "0";
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="ConsumeCommand"/> class.
+        /// </summary>
+        public ConsumeCommand()
+        {
+        }
+
+        /// <summary>
+        /// Serializes the command.
+        /// </summary>
+        /// <returns>
+        /// The serialize command.
+        /// </returns>
+        public string Serialize()
+        {
+            if (this.single == null)
+            {
+                return string.Join(" ", "consume");
+            }
+
+            return string.Join(" ", "consume", this.single);
+        }
+
+        /// <summary>
+        /// Deserializes the specified response text pairs.
+        /// </summary>
+        /// <param name="response">The response.</param>
+        /// <returns>
+        /// The deserialized response.
+        /// </returns>
+        public string Deserialize(SerializedResponse response)
+        {
+            return string.Join(", ", response.ResponseValues);
+        }
+    }
+}

Sources/MpcNET/MpcConnection.cs

@@ -190,7 +190,8 @@ namespace MpcNET
                 .RetryAsync(isReconnect ? 0 : 3)
                 .ExecuteAndCaptureAsync(async (t) =>
                 {
-                    var client = new TcpClient();
+                    var client = new TcpClient(AddressFamily.InterNetworkV6);
+                    client.Client.DualMode = true; // Enable both IPv4 and IPv6
                     using (t.Register(() => client.Close()))
                     {
                         try

Sources/MpcNET/MpcNET.csproj

@@ -24,6 +24,8 @@
     <PackageTags>mpd;client;mpcNET</PackageTags>
     <PackageLicenseExpression>MIT</PackageLicenseExpression>
     <PackageRequireLicenseAcceptance>True</PackageRequireLicenseAcceptance>
+    <IncludeSymbols>true</IncludeSymbols>
+    <SymbolPackageFormat>snupkg</SymbolPackageFormat>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">

Sources/MpcNET/Types/Filters/FilterAudioFormat.cs

@@ -0,0 +1,25 @@
+namespace MpcNET.Types.Filters
+{
+    /// <summary>
+    /// Filter "AudioFormat"
+    /// </summary>
+    public class FilterAudioFormat : IFilter
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="FilterAudioFormat"/> class.
+        /// </summary>
+        /// <param name="Operator">Operator of the filter</param>
+        /// <param name="Value">Value to test</param>
+        /// <param name="Negation">If the expression is negated</param>
+        public FilterAudioFormat(string Value, FilterOperator Operator, bool Negation = false) : base("AudioFormat", Operator, Value, Negation)
+        {
+            if (Operator != FilterOperator.Equal && Operator != FilterOperator.Mask)
+                throw new System.ArgumentException("Operator is not compatible: for \"AudioFormat\" use FilterOperator.Equal or FilterOperator.Mask.");
+
+            this.Name = "AudioFormat";
+            this.Value = Value;
+            this.Operator = Operator;
+            this.Negation = Negation;
+        }
+    }
+}

Sources/MpcNET/Types/Filters/FilterBase.cs

@@ -0,0 +1,25 @@
+namespace MpcNET.Types.Filters
+{
+    /// <summary>
+    /// Filter "base" (not the interface base class, the base command: restrict search songs to a directory)
+    /// </summary>
+    public class FilterBase : IFilter
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="FilterBase"/> class.
+        /// </summary>
+        /// <param name="Operator">Operator of the filter</param>
+        /// <param name="Value">Value to test</param>
+        /// <param name="Negation">If the expression is negated</param>
+        public FilterBase(string Value, FilterOperator Operator, bool Negation = false) : base("base", Operator, Value, Negation)
+        {
+            if (Operator != FilterOperator.None)
+                throw new System.ArgumentException("Operator is not compatible: for \"base\" use FilterOperator.None.");
+
+            this.Name = "base";
+            this.Value = Value;
+            this.Operator = Operator;
+            this.Negation = Negation;
+        }
+    }
+}

Sources/MpcNET/Types/Filters/FilterFile.cs

@@ -0,0 +1,25 @@
+namespace MpcNET.Types.Filters
+{
+    /// <summary>
+    /// Filter "file"
+    /// </summary>
+    public class FilterFile : IFilter
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="FilterFile"/> class.
+        /// </summary>
+        /// <param name="Operator">Operator of the filter</param>
+        /// <param name="Value">Value to test</param>
+        /// <param name="Negation">If the expression is negated</param>
+        public FilterFile(string Value, FilterOperator Operator, bool Negation = false) : base("file", Operator, Value, Negation)
+        {
+            if (Operator != FilterOperator.Equal)
+                throw new System.ArgumentException("Operator is not compatible: for \"File\" use FilterOperator.Equal.");
+
+            this.Name = "file";
+            this.Value = Value;
+            this.Operator = Operator;
+            this.Negation = Negation;
+        }
+    }
+}

Sources/MpcNET/Types/Filters/FilterModifiedSince.cs

@@ -0,0 +1,25 @@
+namespace MpcNET.Types.Filters
+{
+    /// <summary>
+    /// Filter "modified-since"
+    /// </summary>
+    public class FilterModifiedSince : IFilter
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="FilterModifiedSince"/> class.
+        /// </summary>
+        /// <param name="Operator">Operator of the filter</param>
+        /// <param name="Value">Value to test</param>
+        /// <param name="Negation">If the expression is negated</param>
+        public FilterModifiedSince(string Value, FilterOperator Operator, bool Negation = false) : base("modified-since", Operator, Value, Negation)
+        {
+            if (Operator != FilterOperator.None)
+                throw new System.ArgumentException("Operator is not compatible: for \"ModifiedSince\" use FilterOperator.None.");
+
+            this.Name = "modified-since";
+            this.Value = Value;
+            this.Operator = Operator;
+            this.Negation = Negation;
+        }
+    }
+}

Sources/MpcNET/Types/Filters/FilterTag.cs

@@ -0,0 +1,27 @@
+using MpcNET.Tags;
+
+namespace MpcNET.Types.Filters
+{
+    /// <summary>
+    /// Filter "TAG"
+    /// </summary>
+    public class FilterTag : IFilter
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="FilterTag"/> class.
+        /// </summary>
+        /// <param name="Tag">The tag.</param>
+        /// <param name="Operator">Operator of the filter</param>
+        /// <param name="Value">Value to test</param>
+        /// <param name="Negation">If the expression is negated</param>
+        public FilterTag(ITag Tag, string Value, FilterOperator Operator, bool Negation = false) : base(Tag.Value, Operator, Value, Negation)
+        {
+            if (Operator != FilterOperator.Equal && Operator != FilterOperator.Different && Operator != FilterOperator.Contains)
+                throw new System.ArgumentException("Operator is not compatible: for \"TAG\" use FilterOperator.Equal, FilterOperator.Different or FilterOperator.Contains.");
+
+            this.Value = Value;
+            this.Operator = Operator;
+            this.Negation = Negation;
+        }
+    }
+}

Sources/MpcNET/Types/IFilter.cs

@@ -0,0 +1,140 @@
+using System.ComponentModel;
+
+namespace MpcNET.Types
+{
+    /// <summary>
+    /// Operators available for filters in the protocol
+    /// </summary>
+    public enum FilterOperator
+    {
+        /// <summary>
+        /// Equal (==)
+        /// </summary>
+        [Description("==")]
+        Equal,
+        /// <summary>
+        /// Different (!=)
+        /// </summary>
+        [Description("!=")]
+        Different,
+        /// <summary>
+        /// Contains (contains)
+        /// </summary>
+        [Description("contains")]
+        Contains,
+        /// <summary>
+        /// Mask (=~)
+        /// </summary>
+        [Description("=~")]
+        Mask,
+        /// <summary>
+        /// None ("")
+        /// </summary>
+        [Description("")]
+        None,
+    }
+
+    /// <summary>
+    /// </summary>
+    public static class EnumHelper
+    {
+        /// <summary>
+        /// <see cref="GetDescription"/> of the enum
+        /// </summary>
+        /// <param name="enumValue"></param>
+        public static string GetDescription<T>(this T enumValue)
+            where T : struct, System.IConvertible
+        {
+            if (!typeof(T).IsEnum)
+                return null;
+
+            string description = enumValue.ToString();
+            System.Reflection.FieldInfo fieldInfo = enumValue.GetType().GetField(enumValue.ToString());
+
+            if (fieldInfo != null)
+            {
+                object[] attributes = fieldInfo.GetCustomAttributes(typeof(DescriptionAttribute), true);
+                if (attributes != null && attributes.Length > 0)
+                    description = ((DescriptionAttribute)attributes[0]).Description;
+            }
+
+            return description;
+        }
+    }
+
+    /// <summary>
+    /// Filter interface specialized by filters in the protocol
+    /// </summary>
+    public abstract class IFilter
+    {
+        /// <summary>
+        /// Name of the filter
+        /// </summary>
+        public string Name;
+        /// <summary>
+        /// Operator of the filter
+        /// </summary>
+        public FilterOperator Operator;
+        /// <summary>
+        /// Value to test
+        /// </summary>
+        public string Value;
+        /// <summary>
+        /// If the expression is negated
+        /// </summary>
+        public bool Negation;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="IFilter"/> class.
+        /// </summary>
+        /// <param name="Name">Name of the filter</param>
+        /// <param name="Operator">Operator of the filter</param>
+        /// <param name="Value">Value to test</param>
+        /// <param name="Negation">If the expression is negated</param>
+        public IFilter(string Name, FilterOperator Operator, string Value, bool Negation = false)
+        {
+            this.Name = Name;
+            this.Operator = Operator;
+            this.Value = Value;
+            this.Negation = Negation;
+        }
+
+        /// <summary>
+        /// String values are quoted with single or double quotes, 
+        /// and special characters within those values must be escaped with the backslash (\). 
+        /// Keep in mind that the backslash is also the escape character on the protocol level, 
+        /// which means you may need to use double backslash. 
+        /// 
+        /// Example expression which matches an artist named foo'bar":
+        /// (Artist == "foo\'bar\"")
+        /// 
+        /// At the protocol level, the command must look like this:
+        /// find "(Artist == \"foo\\'bar\\\"\")"
+        /// 
+        /// (https://mpd.readthedocs.io/en/stable/protocol.html#filters)
+        /// </summary>
+        /// <param name="value">Value to escape</param>
+        /// <returns></returns>
+        private string escape(string value)
+        {
+            var escapedValue = value.Replace(@"\", @"\\\\")
+                                    .Replace("'", @"\\'")
+                                    .Replace(@"""", @"\\\""");
+
+            return $@"\""{escapedValue}\""";
+        }
+
+        /// <summary>
+        /// Gets the formatted command
+        /// </summary>
+        public string GetFormattedCommand()
+        {
+            string command = $"({Name} {Operator.GetDescription()} {escape(Value)})";
+
+            if (Negation)
+                return $"(!{command})";
+            else
+                return command;
+        }
+    }
+}