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Added command pattern
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‎src/SoftwarePatterns.Core/Command/CommandFactory.cs‎

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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Reflection;
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namespace SoftwarePatterns.Core.Command
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{
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public class CommandFactory : ICommandFactory
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{
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private IEnumerable<Type> availableCommand;
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public string CommandName { get; private set; }
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public string Description { get; private set; }
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public ICommand MakeCommand(string name)
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{
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var commandType = FindRequestedCommand(name);
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if (commandType != null)
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{
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return (ICommand)Activator.CreateInstance(commandType,null);
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}
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return new NotFoundCommand();
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}
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private Type FindRequestedCommand(string name)
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{
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var command = AvailableCommand.FirstOrDefault(type => String.Equals(type.Name.Replace("Command", ""), name, StringComparison.InvariantCultureIgnoreCase));
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return command;
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}
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public IEnumerable<Type> AvailableCommand
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{
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get
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{
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return availableCommand ?? (availableCommand = GetAvailableCommands());
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}
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}
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private static IEnumerable<Type> GetAvailableCommands()
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{
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var list = Assembly.GetExecutingAssembly()
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.GetTypes()
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.Where(type => type.GetInterfaces().Contains(typeof (ICommand)))
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.ToList();
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return list;
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}
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}
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}

‎src/SoftwarePatterns.Core/Command/ICommand.cs‎

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using System;
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namespace SoftwarePatterns.Core.Command
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{
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public interface ICommand
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{
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void Execute();
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}
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public class NotFoundCommand : ICommand
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{
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public void Execute()
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{
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Console.WriteLine("Command not found");
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}
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}
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}

‎src/SoftwarePatterns.Core/Command/ICommandFactory.cs‎

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using System;
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using System.Collections.Generic;
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using System.Linq;
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namespace SoftwarePatterns.Core.Command
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{
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public interface ICommandFactory
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{
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ICommand MakeCommand(string name);
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IEnumerable<Type> AvailableCommand { get; }
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}
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}

‎src/SoftwarePatterns.Core/Command/ReadMe.txt‎

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In the command pattern we use an object to represent and encapsulate all the information needed to call a method at a later time.
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We have a client which executes commands these commands useually have a receiver object that the command call to do the actual work. There is also an optional invoker object that the command can be
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passed to in order to perform command book keeping.
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Traits:
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The command must be completely self contained it should never get any arguments from the client
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Excellent for maintaining open closed principle
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Usage scenario:
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Logging
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Undo
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Validation

‎src/SoftwarePatterns.Core/Command/ShipOrderCommad.cs‎

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using System;
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namespace SoftwarePatterns.Core.Command
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{
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public class ShipOrderCommad : ICommand
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{
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public void Execute()
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{
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Console.WriteLine("Ship the order");
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}
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}
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}

‎src/SoftwarePatterns.Core/Command/UpdateQuantityCommand.cs‎

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using System;
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namespace SoftwarePatterns.Core.Command
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{
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public class UpdateQuantityCommand : ICommand
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{
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public int NewQuantity { get; set; }
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private const int oldQuantity = 5;
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public void Execute()
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{
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//simulate updating db
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Console.WriteLine("Database updated");
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//simulate logging
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Console.WriteLine("LOG: Updated order quantity from {0} to {1}", oldQuantity, NewQuantity);
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}
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}
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}

‎src/SoftwarePatterns.Core/SoftwarePatterns.Core.csproj‎

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<Compile Include="ChainOfResponsability\IExpenseApprover.cs" />
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<Compile Include="ChainOfResponsability\IExpenseHandler.cs" />
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<Compile Include="ChainOfResponsability\IExpenseReport.cs" />
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<Compile Include="Command\CommandFactory.cs" />
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<Compile Include="Command\ICommand.cs" />
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<Compile Include="Command\ICommandFactory.cs" />
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<Compile Include="Command\ShipOrderCommad.cs" />
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<Compile Include="Command\UpdateQuantityCommand.cs" />
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<Compile Include="EnumerationClass\EmployeeType.cs" />
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<Compile Include="EnumerationClass\Enumeration.cs" />
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<Compile Include="Extensions.cs" />
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<Content Include="Bridge\ReadMe.txt" />
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<Content Include="Builder\ReadMe.txt" />
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<Content Include="ChainOfResponsability\ReadMe.txt" />
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<Content Include="Command\ReadMe.txt" />
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<Content Include="EnumerationClass\ReadMe.txt" />
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</ItemGroup>
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<ItemGroup />
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<Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
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<!-- To modify your build process, add your task inside one of the targets below and uncomment it.
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Other similar extension points exist, see Microsoft.Common.targets.

‎src/SoftwarePatterns.Tests/Command/CommandFactoryTests.cs‎

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using SoftwarePatterns.Core.Command;
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using Xunit;
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namespace SoftwarePatterns.Tests.Command
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{
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public class CommandFactoryTests
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{
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public class MakeCommandMethod
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{
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[Fact]
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public void ShouldReturnNotFoundCommandWhenCommandNameWrong()
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{
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var factory = new CommandFactory();
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var command = factory.MakeCommand("Barry");
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Assert.Equal(typeof(NotFoundCommand), command.GetType());
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}
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[Fact]
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public void ShouldReturnCommandWhenCorrectNameProvided()
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{
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var factory = new CommandFactory();
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var command = factory.MakeCommand("UpdateQuantity");
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Assert.Equal(typeof(UpdateQuantityCommand), command.GetType());
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}
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}
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}
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}

‎src/SoftwarePatterns.Tests/SoftwarePatterns.Tests.csproj‎

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<Compile Include="Bridge\StandardFormatterTests.cs" />
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<Compile Include="Builder\EmpolyeeBuilderTests.cs" />
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<Compile Include="ChainOfResponsability\ExpenseHandlerChainTests.cs" />
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<Compile Include="Command\CommandFactoryTests.cs" />
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<Compile Include="Properties\AssemblyInfo.cs" />
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</ItemGroup>
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<ItemGroup>

‎src/SoftwarePatterns/Program.cs‎

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using System;
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using System.Collections.Generic;
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using System.Linq;
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using SoftwarePatterns.Core;
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using SoftwarePatterns.Core.Adapter;
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using SoftwarePatterns.Core.Bridge;
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using SoftwarePatterns.Core.Builder;
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using SoftwarePatterns.Core.ChainOfResponsability;
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using SoftwarePatterns.Core.Command;
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using SoftwarePatterns.Core.EnumerationClass;
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namespace SoftwarePatterns
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#endregion
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#region Command
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public static void Main(string[] args)
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{
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var factory = new CommandFactory();
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var commands = factory.AvailableCommand;
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Console.WriteLine("Commands:");
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commands.ForEach(type => Console.WriteLine(type.Name));
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Console.WriteLine();
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Console.WriteLine("What command do you want to run?");
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var arguments = Console.ReadLine();
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var command = factory.MakeCommand(arguments);
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command.Execute();
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Console.ReadLine();
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}
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#endregion
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#region Chain of responsability
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//public static void Main()

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