Merge pull request #12 from rufer7/11-create-demo-app

Create initial version of demo app

demo-app/ConsoleApp/ChatService.cs

@@ -0,0 +1,37 @@
+using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Logging;
+using RecommenderLogic;
+
+namespace ConsoleApp;
+
+internal sealed class ChatService
+(
+    ILogger<ChatService> Logger,
+    IHostApplicationLifetime AppLifetime,
+    IChatInterface ChatInterface
+)
+{
+    public void StartAndCompleteConversation()
+    {
+        try
+        {
+            Console.WriteLine(ChatInterface.StartConversation());
+
+            while (!AppLifetime.ApplicationStopping.IsCancellationRequested)
+            {
+                var message = Console.ReadLine();
+                AppLifetime.ApplicationStopping.ThrowIfCancellationRequested();
+                var answer = ChatInterface.GetAnswerForMessage(message);
+                Console.Write(answer);
+            }
+        }
+        catch (OperationCanceledException ex)
+        {
+            Logger.LogDebug(ex, "Application stopping");
+        }
+        catch (Exception ex)
+        {
+            Logger.LogError(ex, "Unhandled exception!");
+        }
+    }
+}

demo-app/ConsoleApp/ConsoleApp.csproj

@@ -0,0 +1,18 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.Hosting" Version="9.0.1" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\RecommenderLogic\RecommenderLogic.csproj" />
+  </ItemGroup>
+
+</Project>

demo-app/ConsoleApp/Program.cs

@@ -0,0 +1,38 @@
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Logging;
+using RecommenderLogic.Extensions;
+
+namespace ConsoleApp;
+
+internal static class Program
+{
+    public static async Task Main(string[] args)
+    {
+        using (var host = Host.CreateDefaultBuilder(args).ConfigureServices(AddServices).Build())
+        {
+            await host.StartAsync();
+            var lifetime = host.Services.GetRequiredService<IHostApplicationLifetime>();
+            var chatService = host.Services.GetRequiredService<ChatService>();
+
+            chatService.StartAndCompleteConversation();
+
+            lifetime.StopApplication();
+            await host.WaitForShutdownAsync();
+        }
+    }
+
+    private static void AddServices(HostBuilderContext hostContext, IServiceCollection services)
+    {
+        services.AddLogging(
+            builder =>
+            {
+                builder.AddConsole();
+                builder.AddDebug();
+            }
+        );
+
+        services.AddTravelAgency();
+        services.AddTransient<ChatService>();
+    }
+}

demo-app/RecommenderLogic.Test/RecommenderLogic.Test.csproj

@@ -0,0 +1,22 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <IsPackable>false</IsPackable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="coverlet.collector" Version="6.0.2" />
+    <PackageReference Include="FluentAssertions" Version="8.0.1" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
+    <PackageReference Include="xunit" Version="2.9.2" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Using Include="Xunit" />
+  </ItemGroup>
+
+</Project>

demo-app/RecommenderLogic.Test/UnitTest1.cs

@@ -0,0 +1,12 @@
+using FluentAssertions;
+
+namespace RecommenderLogic.Test;
+
+public class UnitTest1
+{
+    [Fact]
+    public void Test1()
+    {
+        true.Should().BeTrue();
+    }
+}

demo-app/RecommenderLogic/Destinations/Destination.cs

@@ -0,0 +1,5 @@
+using RecommenderLogic.Parameters;
+
+namespace RecommenderLogic.Destinations;
+
+internal readonly record struct Destination(string Name, string Description, AgeCategory AgeCategory, Companion Companion, Reason Reason);

demo-app/RecommenderLogic/Destinations/DestinationProvider.cs

@@ -0,0 +1,42 @@
+using RecommenderLogic.Parameters;
+
+namespace RecommenderLogic.Destinations;
+
+internal class DestinationProvider
+{
+    private readonly List<Destination> destinations =
+    [
+        new("Bali", "Lounge on beaches, devour Nasi Goreng, and perfect the art of doing nothing.", AgeCategory.YoungAdult, Companion.Solo, Reason.EatSleepRepeat),
+        new("Santorini", "Whitewashed walls and sunsets so pretty your Instagram will crash.", AgeCategory.YoungAdult, Companion.Solo, Reason.FlexOnSocialMedia),
+        new("Chiang Mai", "Co-working cafes by day, street food by night; pretend you’re 'finding yourself' while working.", AgeCategory.YoungAdult, Companion.Solo, Reason.SecretlyWorking),
+        new("Maldives", "Water villas and private dinners; say 'Sorry, no Wi-Fi!' with your partner.", AgeCategory.YoungAdult, Companion.Partner, Reason.EatSleepRepeat),
+        new("Positano", "Hold hands, drink wine, and make your friends cry over your Amalfi Coast views.", AgeCategory.YoungAdult, Companion.Partner, Reason.FlexOnSocialMedia),
+        new("Lisbon", "Cute alleys for selfies and Wi-Fi cafes to sneakily check your emails.", AgeCategory.YoungAdult, Companion.Partner, Reason.SecretlyWorking),
+        new("Orlando", "Theme parks for the kids, buffet lines for you. Mickey Mouse is your spirit animal.", AgeCategory.YoungAdult, Companion.Family, Reason.EatSleepRepeat),
+        new("Dubai", "Indoor skiing, luxury malls, and family photos that scream 'we made it!'", AgeCategory.YoungAdult, Companion.Family, Reason.FlexOnSocialMedia),
+        new("Phuket", "Juggle beach time with kids and secret Zoom calls from your balcony.", AgeCategory.YoungAdult, Companion.Family, Reason.SecretlyWorking),
+
+        new("Tuscany", "Sip wine, eat pasta, and nap under the Italian sun like royalty.", AgeCategory.Adult, Companion.Solo, Reason.EatSleepRepeat),
+        new("Machu Picchu", "Post selfies on ancient ruins and claim you 'hiked' all the way up.", AgeCategory.Adult, Companion.Solo, Reason.FlexOnSocialMedia),
+        new("Kyoto", "Zen gardens for inner peace and coworking spaces to crush deadlines.", AgeCategory.Adult, Companion.Solo, Reason.SecretlyWorking),
+        new("Seychelles", "Forget your problems while sipping cocktails in paradise with your partner.", AgeCategory.Adult, Companion.Partner, Reason.EatSleepRepeat),
+        new("Paris", "Kiss by the Eiffel Tower and hashtag #NoFilter for maximum envy points.", AgeCategory.Adult, Companion.Partner, Reason.FlexOnSocialMedia),
+        new("Barcelona", "Squeeze in emails between tapas bars and Gaudí architecture tours.", AgeCategory.Adult, Companion.Partner, Reason.SecretlyWorking),
+        new("Cancún", "All-inclusive resorts mean zero effort while the kids are busy with sandcastles.", AgeCategory.Adult, Companion.Family, Reason.EatSleepRepeat),
+        new("Reykjavík", "Post your whole crew under the Northern Lights and wait for 'wow' comments.", AgeCategory.Adult, Companion.Family, Reason.FlexOnSocialMedia),
+        new("Hawaii", "Take calls while the kids surf. Your background is too stunning for anyone to care.", AgeCategory.Adult, Companion.Family, Reason.SecretlyWorking),
+
+        new("Provence", "Lavender fields, slow strolls, and cheese that pairs perfectly with naps.", AgeCategory.Senior, Companion.Solo, Reason.EatSleepRepeat),
+        new("Banff", "Snap pictures of turquoise lakes and post, 'Oh, just another quiet day.'", AgeCategory.Senior, Companion.Solo, Reason.FlexOnSocialMedia),
+        new("Amsterdam", "Cycle along canals and schedule Zoom calls under the guise of 'slow travel.'", AgeCategory.Senior, Companion.Solo, Reason.SecretlyWorking),
+        new("Venice", "Gondola rides, endless gelato, and leisurely people-watching with your partner.", AgeCategory.Senior, Companion.Partner, Reason.EatSleepRepeat),
+        new("Kyoto", "Cherry blossoms, kimonos, and a feed full of serene beauty.", AgeCategory.Senior, Companion.Partner, Reason.FlexOnSocialMedia),
+        new("Dubrovnik", "Claim you’re exploring 'Game of Thrones' spots while answering emails.", AgeCategory.Senior, Companion.Partner, Reason.SecretlyWorking),
+        new("Scottsdale", "Spas for you, golf for them, and a schedule that’s empty as your inbox.", AgeCategory.Senior, Companion.Family, Reason.EatSleepRepeat),
+        new("Sydney", "Opera House, Bondi Beach, and family photos that scream 'global explorers.'", AgeCategory.Senior, Companion.Family, Reason.FlexOnSocialMedia),
+        new("Cape Town", "Safari by day, sneak in emails by night—just don’t let the lions know.", AgeCategory.Senior, Companion.Family, Reason.SecretlyWorking),
+    ];
+
+    public Destination GetDestination(AgeCategory ageCategory, Companion companion, Reason reason) =>
+        destinations.FirstOrDefault(d => d.AgeCategory == ageCategory && d.Companion == companion && d.Reason == reason);
+}

demo-app/RecommenderLogic/Extensions/ServiceCollectionExtensions.cs

@@ -0,0 +1,15 @@
+using Microsoft.Extensions.DependencyInjection;
+using RecommenderLogic.Destinations;
+
+namespace RecommenderLogic.Extensions;
+
+public static class ServiceCollectionExtensions
+{
+    public static IServiceCollection AddTravelAgency(this IServiceCollection services)
+    {
+        ArgumentNullException.ThrowIfNull(services);
+        services.AddTransient<IChatInterface, TravelAgent>();
+        services.AddTransient<DestinationProvider>();
+        return services;
+    }
+}

demo-app/RecommenderLogic/IChatInterface.cs

@@ -0,0 +1,7 @@
+namespace RecommenderLogic;
+
+public interface IChatInterface
+{
+    string StartConversation();
+    string GetAnswerForMessage(string? message);
+}

demo-app/RecommenderLogic/Outputs.cs

@@ -0,0 +1,53 @@
+namespace RecommenderLogic;
+
+internal readonly record struct Outputs
+{
+    public const string EmptyLine = @"
+";
+    public const string Header = @"
+ _______                  _                                          
+|__   __|                | |                                         
+   | |_ __ __ ___   _____| |                                         
+   | | '__/ _` \ \ / / _ \ |                                         
+   | | | | (_| |\ V /  __/ |                                         
+ __|_|_|  \__,_| \_/ \___|_|        _   _                            
+|  __ \          | | (_)           | | (_)                           
+| |  | | ___  ___| |_ _ _ __   __ _| |_ _  ___  _ __                 
+| |  | |/ _ \/ __| __| | '_ \ / _` | __| |/ _ \| '_ \                
+| |__| |  __/\__ \ |_| | | | | (_| | |_| | (_) | | | |               
+|_____/ \___||___/\__|_|_| |_|\__,_|\__|_|\___/|_| |_|   _           
+|  __ \                                                 | |          
+| |__) |___  ___ ___  _ __ ___  _ __ ___   ___ _ __   __| | ___ _ __ 
+|  _  // _ \/ __/ _ \| '_ ` _ \| '_ ` _ \ / _ \ '_ \ / _` |/ _ \ '__|
+| | \ \  __/ (_| (_) | | | | | | | | | | |  __/ | | | (_| |  __/ |   
+|_|  \_\___|\___\___/|_| |_| |_|_| |_| |_|\___|_| |_|\__,_|\___|_|   
+";
+    public const string WelcomeMessage = @"
+The Travel Destination Recommender is an innovative system that utilises 
+advanced algorithms to provide recommendations for travel destinations, 
+taking into account a range of factors.
+";
+    public const string AgeQuestion = @"
+What is the age of the primary traveller?
+
+[1] 18-30
+[2] 30-60
+[3] 60+
+";
+    public const string CompanionQuestion = @"
+Who will be accompanying the primary traveller?
+
+[1] No one
+[2] Partner
+[3] Family
+";
+    public const string ReasonQuestion = @"
+What is the primary motivation for travelling?
+
+[1]     Eat, Sleep, Repeat: Do nothing but gain weight
+[2]     Flex on Social Media: All others should be jealous
+[3]     Secretly Working: My boss forces me to go on vacation, but I work anyway
+";
+    public const string UnknownAnswer = "I'm sorry, I didn't understand that. Please try again.";
+    public static string Concat(params string[] strings) => string.Join(EmptyLine, strings);
+}

demo-app/RecommenderLogic/Parameters/AgeCategory.cs

@@ -0,0 +1,10 @@
+namespace RecommenderLogic.Parameters;
+
+internal enum AgeCategory
+{
+    Unknown = 0,
+    YoungAdult = 1,
+    Adult = 2,
+    Midlife = 3,
+    Senior = 4,
+}

demo-app/RecommenderLogic/Parameters/Companion.cs

@@ -0,0 +1,10 @@
+namespace RecommenderLogic.Parameters;
+
+internal enum Companion
+{
+    Unknown = 0,
+    Solo = 1,
+    Partner = 2,
+    Family = 3,
+    Friends = 4
+}

demo-app/RecommenderLogic/Parameters/Reason.cs

@@ -0,0 +1,10 @@
+namespace RecommenderLogic.Parameters;
+
+internal enum Reason
+{
+    Unknown = 0,
+    EatSleepRepeat = 1,
+    HideFromReality = 2,
+    SecretlyWorking = 3,
+    FlexOnSocialMedia = 4,
+}

demo-app/RecommenderLogic/RecommenderLogic.csproj

@@ -0,0 +1,13 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="9.0.1" />
+  </ItemGroup>
+
+</Project>

demo-app/RecommenderLogic/TravelAgent.cs

@@ -0,0 +1,43 @@
+using RecommenderLogic.Destinations;
+using RecommenderLogic.Parameters;
+
+namespace RecommenderLogic;
+
+internal class TravelAgent(DestinationProvider DestinationProvider) : IChatInterface
+{
+    private AgeCategory ageCategory = AgeCategory.Unknown;
+    private Companion companion = Companion.Unknown;
+    private Reason reason = Reason.Unknown;
+
+    public string StartConversation() => Outputs.Concat(Outputs.Header, Outputs.WelcomeMessage, Outputs.AgeQuestion);
+
+    public string GetAnswerForMessage(string? message)
+    {
+        if (ageCategory == AgeCategory.Unknown)
+        {
+            return Enum.TryParse(message, out ageCategory)
+                ? Outputs.CompanionQuestion
+                : Outputs.Concat(Outputs.UnknownAnswer, Outputs.AgeQuestion);
+        }
+
+        if (companion == Companion.Unknown)
+        {
+            return Enum.TryParse(message, out companion)
+                ? Outputs.ReasonQuestion
+                : Outputs.Concat(Outputs.UnknownAnswer, Outputs.CompanionQuestion);
+        }
+
+        if (reason == Reason.Unknown)
+        {
+            if (Enum.TryParse(message, out reason))
+            {
+                var destination = DestinationProvider.GetDestination(ageCategory, companion, reason);
+                return Outputs.Concat(destination.Name, destination.Description);
+            }
+
+            return Outputs.Concat(Outputs.UnknownAnswer, Outputs.ReasonQuestion);
+        }
+
+        return "Press Ctrl+C to shut down";
+    }
+}

demo-app/TravelDestinationRecommender.sln

@@ -0,0 +1,34 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.12.35707.178
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ConsoleApp", "ConsoleApp\ConsoleApp.csproj", "{E73D0338-E8BD-44FD-BA9D-798343CF3085}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "RecommenderLogic", "RecommenderLogic\RecommenderLogic.csproj", "{8A711A80-AC79-4C9C-BA67-03EC1B2051C2}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "RecommenderLogic.Test", "RecommenderLogic.Test\RecommenderLogic.Test.csproj", "{69277E3C-EC3C-4BE8-8ACB-E7F687D63784}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{E73D0338-E8BD-44FD-BA9D-798343CF3085}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{E73D0338-E8BD-44FD-BA9D-798343CF3085}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{E73D0338-E8BD-44FD-BA9D-798343CF3085}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{E73D0338-E8BD-44FD-BA9D-798343CF3085}.Release|Any CPU.Build.0 = Release|Any CPU
+		{8A711A80-AC79-4C9C-BA67-03EC1B2051C2}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{8A711A80-AC79-4C9C-BA67-03EC1B2051C2}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{8A711A80-AC79-4C9C-BA67-03EC1B2051C2}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{8A711A80-AC79-4C9C-BA67-03EC1B2051C2}.Release|Any CPU.Build.0 = Release|Any CPU
+		{69277E3C-EC3C-4BE8-8ACB-E7F687D63784}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{69277E3C-EC3C-4BE8-8ACB-E7F687D63784}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{69277E3C-EC3C-4BE8-8ACB-E7F687D63784}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{69277E3C-EC3C-4BE8-8ACB-E7F687D63784}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal