Initial

.gitignore

@@ -1,3 +1,5 @@
+.DS_Store
+
 ## Ignore Visual Studio temporary files, build results, and
 ## files generated by popular Visual Studio add-ons.
 ##

TailSpin.SpaceGame.Web.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 15
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "TailSpin.SpaceGame.Web", "TailSpin.SpaceGame.Web\TailSpin.SpaceGame.Web.csproj", "{A0C4E31E-AC75-4F39-9F59-0AA19D9B8F46}"
+EndProject
+Global
+ GlobalSection(SolutionConfigurationPlatforms) = preSolution
+ Debug|Any CPU = Debug|Any CPU
+ Release|Any CPU = Release|Any CPU
+ EndGlobalSection
+ GlobalSection(ProjectConfigurationPlatforms) = postSolution
+ {A0C4E31E-AC75-4F39-9F59-0AA19D9B8F46}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+ {A0C4E31E-AC75-4F39-9F59-0AA19D9B8F46}.Debug|Any CPU.Build.0 = Debug|Any CPU
+ {A0C4E31E-AC75-4F39-9F59-0AA19D9B8F46}.Release|Any CPU.ActiveCfg = Release|Any CPU
+ {A0C4E31E-AC75-4F39-9F59-0AA19D9B8F46}.Release|Any CPU.Build.0 = Release|Any CPU
+ EndGlobalSection
+EndGlobal

Tailspin.SpaceGame.Web/Controllers/HomeController.cs

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+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Linq.Expressions;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Mvc;
+using TailSpin.SpaceGame.Web.Models;
+
+namespace TailSpin.SpaceGame.Web.Controllers
+{
+ public class HomeController : Controller
+ {
+ // High score repository.
+ private readonly IDocumentDBRepository<Score> _scoreRepository;
+ // User profile repository.
+ private readonly IDocumentDBRepository<Profile> _profileRespository;
+
+ public HomeController(
+ IDocumentDBRepository<Score> scoreRepository,
+ IDocumentDBRepository<Profile> profileRespository
+ )
+ {
+ _scoreRepository = scoreRepository;
+ _profileRespository = profileRespository;
+ }
+
+ public async Task<IActionResult> Index(
+ int page = 1, 
+ int pageSize = 10, 
+ string mode = "",
+ string region = ""
+ )
+ {
+ // Create the view model with initial values we already know.
+ var vm = new LeaderboardViewModel
+ {
+ Page = page,
+ PageSize = pageSize,
+ SelectedMode = mode,
+ SelectedRegion = region,
+
+ GameModes = new List<string>()
+ {
+ "Solo",
+ "Duo",
+ "Trio"
+ },
+
+ GameRegions = new List<string>()
+ {
+ "Milky Way",
+ "Andromeda",
+ "Pinwheel",
+ "NGC 1300",
+ "Messier 82",
+ }
+ };
+
+ try
+ {
+ // Form the query predicate.
+ // This expression selects all scores that match the provided game 
+ // mode and region (map).
+ // Select the score if the game mode or region is empty.
+ Expression<Func<Score, bool>> queryPredicate = score =>
+ (string.IsNullOrEmpty(mode) || score.GameMode == mode) &&
+ (string.IsNullOrEmpty(region) || score.GameRegion == region);
+
+ // Fetch the total number of results in the background.
+ var countItemsTask = _scoreRepository.CountItemsAsync(queryPredicate);
+
+ // Fetch the scores that match the current filter.
+ IEnumerable<Score> scores = await _scoreRepository.GetItemsAsync(
+ queryPredicate, // the predicate defined above
+ score => score.HighScore, // sort descending by high score
+ page - 1, // subtract 1 to make the query 0-based
+ pageSize
+ );
+
+ // Wait for the total count.
+ vm.TotalResults = await countItemsTask;
+
+ // Set previous and next hyperlinks.
+ if (page > 1)
+ {
+ vm.PrevLink = $"/?page={page - 1}&pageSize={pageSize}&mode={mode}&region={region}#leaderboard";
+ }
+ if (vm.TotalResults > page * pageSize)
+ {
+ vm.NextLink = $"/?page={page + 1}&pageSize={pageSize}&mode={mode}&region={region}#leaderboard";
+ }
+
+ // Fetch the user profile for each score.
+ // This creates a list that's parallel with the scores collection.
+ var profiles = new List<Task<Profile>>();
+ foreach (var score in scores)
+ {
+ profiles.Add(_profileRespository.GetItemAsync(score.ProfileId));
+ }
+ Task<Profile>.WaitAll(profiles.ToArray());
+
+ // Combine each score with its profile.
+ vm.Scores = scores.Zip(profiles, (score, profile) => new ScoreProfile { Score = score, Profile = profile.Result });
+
+ return View(vm);
+ }
+ catch (Exception ex)
+ {
+ return View(vm);
+ }
+ }
+
+ [Route("/profile/{id}")]
+ public async Task<IActionResult> Profile(string id, string rank="")
+ {
+ try
+ {
+ // Fetch the user profile with the given identifier.
+ return View(new ProfileViewModel { Profile = await _profileRespository.GetItemAsync(id), Rank = rank });
+ }
+ catch (Exception ex)
+ {
+ return RedirectToAction("/");
+ }
+ }
+
+ public IActionResult Privacy()
+ {
+ return View();
+ }
+
+ [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
+ public IActionResult Error()
+ {
+ return View(new ErrorViewModel { RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier });
+ }
+ }
+}

Tailspin.SpaceGame.Web/IDocumentDBRepository.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq.Expressions;
+using System.Threading.Tasks;
+using TailSpin.SpaceGame.Web.Models;
+
+namespace TailSpin.SpaceGame.Web
+{
+ public interface IDocumentDBRepository<T> where T : Model
+ {
+ /// <summary>
+ /// Retrieves the item from the store with the given identifier.
+ /// </summary>
+ /// <returns>
+ /// A task that represents the asynchronous operation.
+ /// The task result contains the retrieved item.
+ /// </returns>
+ /// <param name="id">The identifier of the item to retrieve.</param>
+ Task<T> GetItemAsync(string id);
+
+ /// <summary>
+ /// Retrieves items from the store that match the given query predicate.
+ /// Results are given in descending order by the given ordering predicate.
+ /// </summary>
+ /// <returns>
+ /// A task that represents the asynchronous operation.
+ /// The task result contains the collection of retrieved items.
+ /// </returns>
+ /// <param name="queryPredicate">Predicate that specifies which items to select.</param>
+ /// <param name="orderDescendingPredicate">Predicate that specifies how to sort the results in descending order.</param>
+ /// <param name="page">The 1-based page of results to return.</param>
+ /// <param name="pageSize">The number of items on a page.</param>
+ Task<IEnumerable<T>> GetItemsAsync(
+ Expression<Func<T, bool>> queryPredicate,
+ Expression<Func<T, int>> orderDescendingPredicate,
+ int page = 1,
+ int pageSize = 10
+ );
+
+ /// <summary>
+ /// Retrieves the number of items that match the given query predicate.
+ /// </summary>
+ /// <returns>
+ /// A task that represents the asynchronous operation.
+ /// The task result contains the number of items that match the query predicate.
+ /// </returns>
+ /// <param name="queryPredicate">Predicate that specifies which items to select.</param>
+ Task<int> CountItemsAsync(Expression<Func<T, bool>> queryPredicate);
+ }
+}

Tailspin.SpaceGame.Web/LocalDocumentDBRepository.cs

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+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Linq.Expressions;
+using System.Threading.Tasks;
+using Newtonsoft.Json;
+using TailSpin.SpaceGame.Web.Models;
+
+namespace TailSpin.SpaceGame.Web
+{
+ public class LocalDocumentDBRepository<T> : IDocumentDBRepository<T> where T : Model
+ {
+ // An in-memory list of all items in the collection.
+ private readonly List<T> _items;
+
+ public LocalDocumentDBRepository(string fileName)
+ {
+ // Serialize the items from the provided JSON document.
+ _items = JsonConvert.DeserializeObject<List<T>>(File.ReadAllText(fileName));
+ }
+
+ /// <summary>
+ /// Retrieves the item from the store with the given identifier.
+ /// </summary>
+ /// <returns>
+ /// A task that represents the asynchronous operation.
+ /// The task result contains the retrieved item.
+ /// </returns>
+ /// <param name="id">The identifier of the item to retrieve.</param>
+ public Task<T> GetItemAsync(string id)
+ {
+ return Task<T>.FromResult(_items.Single(item => item.Id == id));
+ }
+
+ /// <summary>
+ /// Retrieves items from the store that match the given query predicate.
+ /// Results are given in descending order by the given ordering predicate.
+ /// </summary>
+ /// <returns>
+ /// A task that represents the asynchronous operation.
+ /// The task result contains the collection of retrieved items.
+ /// </returns>
+ /// <param name="queryPredicate">Predicate that specifies which items to select.</param>
+ /// <param name="orderDescendingPredicate">Predicate that specifies how to sort the results in descending order.</param>
+ /// <param name="page">The 1-based page of results to return.</param>
+ /// <param name="pageSize">The number of items on a page.</param>
+ public Task<IEnumerable<T>> GetItemsAsync(
+ Expression<Func<T, bool>> queryPredicate,
+ Expression<Func<T, int>> orderDescendingPredicate,
+ int page = 1, int pageSize = 10
+ )
+ {
+ var result = _items.AsQueryable()
+ .Where(queryPredicate) // filter
+ .OrderByDescending(orderDescendingPredicate) // sort
+ .Skip(page * pageSize) // find page
+ .Take(pageSize) // take items
+ .AsEnumerable(); // make enumeratable
+
+ return Task<IEnumerable<T>>.FromResult(result);
+ }
+
+ /// <summary>
+ /// Retrieves the number of items that match the given query predicate.
+ /// </summary>
+ /// <returns>
+ /// A task that represents the asynchronous operation.
+ /// The task result contains the number of items that match the query predicate.
+ /// </returns>
+ /// <param name="queryPredicate">Predicate that specifies which items to select.</param>
+ public Task<int> CountItemsAsync(Expression<Func<T, bool>> queryPredicate)
+ {
+ var count = _items.AsQueryable()
+ .Where(queryPredicate) // filter
+ .Count(); // count
+
+ return Task<int>.FromResult(count);
+ }
+ }
+}

Tailspin.SpaceGame.Web/Models/ErrorViewModel.cs

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+namespace TailSpin.SpaceGame.Web.Models
+{
+ public class ErrorViewModel
+ {
+ public string RequestId { get; set; }
+
+ public bool ShowRequestId => !string.IsNullOrEmpty(RequestId);
+ }
+}

Tailspin.SpaceGame.Web/Models/LeaderboardViewModel.cs

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+using System.Collections.Generic;
+
+namespace TailSpin.SpaceGame.Web.Models
+{
+ public class LeaderboardViewModel
+ {
+ // The game mode selected in the view.
+ public string SelectedMode { get; set; }
+ // The game region (map) selected in the view.
+ public string SelectedRegion { get; set; }
+ // The current page to be shown in the view.
+ public int Page { get; set; }
+ // The number of items to show per page in the view.
+ public int PageSize { get; set; }
+
+ // The scores to display in the view.
+ public IEnumerable<ScoreProfile> Scores { get; set; }
+ // The game modes to display in the view.
+ public IEnumerable<string> GameModes { get; set; }
+ // The game regions (maps) to display in the view.
+ public IEnumerable<string> GameRegions { get; set; }
+
+ // Hyperlink to the previous page of results.
+ // This is empty if this is the first page.
+ public string PrevLink { get; set; }
+ // Hyperlink to the next page of results.
+ // This is empty if this is the last page.
+ public string NextLink { get; set; }
+ // The total number of results for the selected game mode and region in the view.
+ public int TotalResults { get; set; }
+ }
+
+ /// <summary>
+ /// Combines a score and a user profile.
+ /// </summary>
+ public struct ScoreProfile
+ {
+ // The player's score.
+ public Score Score;
+ // The player's profile.
+ public Profile Profile;
+ }
+}

Tailspin.SpaceGame.Web/Models/Model.cs

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+using Newtonsoft.Json;
+
+namespace TailSpin.SpaceGame.Web.Models
+{
+ /// <summary>
+ /// Base class for data models.
+ /// </summary>
+ public abstract class Model
+ {
+ // The value that uniquely identifies this object.
+ [JsonProperty(PropertyName = "id")]
+ public string Id { get; set; }
+ }
+}

Tailspin.SpaceGame.Web/Models/Profile.cs

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+using Newtonsoft.Json;
+
+namespace TailSpin.SpaceGame.Web.Models
+{
+ public class Profile : Model
+ {
+ // The player's user name.
+ [JsonProperty(PropertyName = "userName")]
+ public string UserName { get; set; }
+
+ // The URL of the player's avatar image.
+ [JsonProperty(PropertyName = "avatarUrl")]
+ public string AvatarUrl { get; set; }
+
+ // The achievements the player earned.
+ [JsonProperty(PropertyName = "achievements")]
+ public string[] Achievements { get; set; }
+ }
+}