feature/dotnet (#3)

Update transactions to match design

Stub out hub methods needed for VCinema

Un-asynced

Use interfaces to make mocking and testing easier

WIP: VCinema ASP.NET Core edition

Co-authored-by: Jack Hadrill <jack@hadrill.co.uk>
Reviewed-on: #3

.gitignore

@@ -1,15 +1,21 @@
-# ---> VisualStudioCode
-.vscode/*
-!.vscode/settings.json
-!.vscode/tasks.json
-!.vscode/launch.json
-!.vscode/extensions.json
-*.code-workspace
+# globs
+Makefile.in
+*.userprefs
+*.usertasks
+config.make
+config.status
+aclocal.m4
+install-sh
+autom4te.cache/
+*.tar.gz
+tarballs/
+test-results/
 
-# Local History for Visual Studio Code
-.history/
+# Mac bundle stuff
+*.dmg
+*.app
 
-# ---> macOS
+# content below from: https://github.com/github/gitignore/blob/master/Global/macOS.gitignore
 # General
 .DS_Store
 .AppleDouble
@@ -18,6 +24,7 @@
 # Icon must end with two \r
 Icon
 
+
 # Thumbnails
 ._*
 
@@ -37,25 +44,9 @@ Network Trash Folder
 Temporary Items
 .apdisk
 
-# ---> Linux
-*~
-
-# temporary files which can be created if a process still has a handle open of a deleted file
-.fuse_hidden*
-
-# KDE directory preferences
-.directory
-
-# Linux trash folder which might appear on any partition or disk
-.Trash-*
-
-# .nfs files are created when an open file is removed but is still being accessed
-.nfs*
-
-# ---> Windows
+# content below from: https://github.com/github/gitignore/blob/master/Global/Windows.gitignore
 # Windows thumbnail cache files
 Thumbs.db
-Thumbs.db:encryptable
 ehthumbs.db
 ehthumbs_vista.db
 
@@ -78,3 +69,337 @@ $RECYCLE.BIN/
 # Windows shortcuts
 *.lnk
 
+# content below from: https://github.com/github/gitignore/blob/master/VisualStudio.gitignore
+## 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/
+x86/
+bld/
+[Bb]in/
+[Oo]bj/
+[Ll]og/
+
+# 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
+*.VisualState.xml
+TestResult.xml
+
+# Build Results of an ATL Project
+[Dd]ebugPS/
+[Rr]eleasePS/
+dlldata.c
+
+# Benchmark Results
+BenchmarkDotNet.Artifacts/
+
+# .NET Core
+project.lock.json
+project.fragment.lock.json
+artifacts/
+
+# StyleCop
+StyleCopReport.xml
+
+# Files built by Visual Studio
+*_i.c
+*_p.c
+*_h.h
+*.ilk
+*.meta
+*.obj
+*.iobj
+*.pch
+*.pdb
+*.ipdb
+*.pgc
+*.pgd
+*.rsp
+*.sbr
+*.tlb
+*.tli
+*.tlh
+*.tmp
+*.tmp_proj
+*_wpftmp.csproj
+*.log
+*.vspscc
+*.vssscc
+.builds
+*.pidb
+*.svclog
+*.scc
+
+# Chutzpah Test files
+_Chutzpah*
+
+# Visual C++ cache files
+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/
+
+# Guidance Automation Toolkit
+*.gpState
+
+# ReSharper is a .NET coding add-in
+_ReSharper*/
+*.[Rr]e[Ss]harper
+*.DotSettings.user
+
+# JustCode is a .NET coding add-in
+.JustCode
+
+# TeamCity is a build add-in
+_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.*
+AutoTest.Net/
+
+# Web workbench (sass)
+.sass-cache/
+
+# Installshield output folder
+[Ee]xpress/
+
+# DocProject is a documentation generator add-in
+DocProject/buildhelp/
+DocProject/Help/*.HxT
+DocProject/Help/*.HxC
+DocProject/Help/*.hhc
+DocProject/Help/*.hhk
+DocProject/Help/*.hhp
+DocProject/Help/Html2
+DocProject/Help/html
+
+# Click-Once directory
+publish/
+
+# Publish Web Output
+*.[Pp]ublish.xml
+*.azurePubxml
+# 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
+
+# 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/
+
+# 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
+
+# Microsoft Azure Build Output
+csx/
+*.build.csdef
+
+# 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
+ClientBin/
+~$*
+*~
+*.dbmdl
+*.dbproj.schemaview
+*.jfm
+*.pfx
+*.publishsettings
+orleans.codegen.cs
+
+# Including strong name files can present a security risk
+# (https://github.com/github/gitignore/pull/2483#issue-259490424)
+#*.snk
+
+# 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/
+
+# Backup & report files from converting an old project file
+# to a newer Visual Studio version. Backup files are not needed,
+# because we have git ;-)
+_UpgradeReport_Files/
+Backup*/
+UpgradeLog*.XML
+UpgradeLog*.htm
+ServiceFabricBackup/
+*.rptproj.bak
+
+# SQL Server files
+*.mdf
+*.ldf
+*.ndf
+
+# Business Intelligence projects
+*.rdl.data
+*.bim.layout
+*.bim_*.settings
+*.rptproj.rsuser
+
+# Microsoft Fakes
+FakesAssemblies/
+
+# GhostDoc plugin setting file
+*.GhostDoc.xml
+
+# Node.js Tools for Visual Studio
+.ntvs_analysis.dat
+node_modules/
+
+# 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 personal settings
+.cr/personal
+
+# 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/
+
+# MSBuild Binary and Structured Log
+*.binlog
+
+# NVidia Nsight GPU debugger configuration file
+*.nvuser
+
+# MFractors (Xamarin productivity tool) working folder
+.mfractor/
+
+# Local History for Visual Studio
+.localhistory/

VCinema.sln

@@ -0,0 +1,17 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 15
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "VCinemaApi", "VCinema\VCinemaApi.csproj", "{CF731C3C-2EB8-4C7A-B0BA-556B5CB74106}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{CF731C3C-2EB8-4C7A-B0BA-556B5CB74106}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{CF731C3C-2EB8-4C7A-B0BA-556B5CB74106}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{CF731C3C-2EB8-4C7A-B0BA-556B5CB74106}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{CF731C3C-2EB8-4C7A-B0BA-556B5CB74106}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+EndGlobal

VCinema/Hubs/IVCinemaHub.cs

@@ -0,0 +1,15 @@
+using VCinemaApi.Models;
+
+namespace VCinemaApi.Hubs
+{
+    public interface IVCinemaHub
+    {
+        public Screen CreateScreen(string name, string source);
+        public void DeleteScreen(int screenId);
+        public Screen WatchScreen(int screenId);
+        public void LeaveScreen();
+        public Watcher SetWatcherName(string name);
+        public Screen SetPlayState(bool playing);
+        public void SetPlayState(bool playing, int playOffset);
+    }
+}

VCinema/Hubs/VCinemaHub.cs

@@ -0,0 +1,69 @@
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.SignalR;
+using VCinemaApi.Models;
+using VCinemaApi.Repositories;
+
+namespace VCinemaApi.Hubs
+{
+    public class VCinemaHub : Hub<IVCinemaHub>
+    {
+        private readonly IScreenRepository _screenRepository;
+        private readonly IWatcherRepository _watcherRepository;
+
+        public VCinemaHub(IScreenRepository screenRepository, IWatcherRepository watcherRepository)
+        {
+            _screenRepository = screenRepository;
+            _watcherRepository = watcherRepository;
+        }
+
+        public override async Task OnConnectedAsync()
+        {
+            _watcherRepository.AddWatcher(Context.ConnectionId);
+            await base.OnConnectedAsync();
+        }
+
+        public override async Task OnDisconnectedAsync(Exception exception)
+        {
+            _watcherRepository.DeleteWatcherByConnectionId(Context.ConnectionId);
+            await base.OnDisconnectedAsync(exception);
+        }
+
+        public Screen CreateScreen(string name, string source)
+        {
+            return _screenRepository.AddScreen(name, source);
+        }
+
+        public void DeleteScreen(int screenId)
+        {
+            _screenRepository.DeleteScreenById(screenId);
+        }
+
+        public Screen WatchScreen(int screenId)
+        {
+            var watcher = _watcherRepository.SetWatcherScreenByConnectionId(Context.ConnectionId, screenId);
+            return watcher.Screen;
+        }
+
+        public void LeaveScreen()
+        {
+            _watcherRepository.UnsetWatcherScreenByConnectionId(Context.ConnectionId);
+        }
+
+        public Watcher SetWatcherName(string name)
+        {
+            return _watcherRepository.SetWatcherNameByConnectionId(Context.ConnectionId, name);
+        }
+
+        public Screen SetPlayState(bool playing)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Screen SetPlayState(bool playing, int playOffset)
+        {
+            throw new NotImplementedException();
+        }
+    }
+}

VCinema/Models/Screen.cs

@@ -0,0 +1,23 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+
+namespace VCinemaApi.Models
+{
+    public class Screen
+    {
+        [Key]
+        public int ScreenId { get; set; }
+
+        [Required]
+        public string Name { get; set; }
+        [Required]
+        public string Source { get; set; }
+
+        public DateTime PlayStateUpdated { get; set; }
+        public bool PlayState { get; set; }
+        public int PlayOffset { get; set; }
+
+        public ICollection<Watcher> Watchers { get; set; }
+    }
+}

VCinema/Models/VCinemaContext.cs

@@ -0,0 +1,13 @@
+using Microsoft.EntityFrameworkCore;
+namespace VCinemaApi.Models
+{
+    public class VCinemaContext : DbContext
+    {
+        public VCinemaContext(DbContextOptions<VCinemaContext> options): base(options)
+        {
+        }
+
+        public DbSet<Watcher> Watchers { get; set; }
+        public DbSet<Screen> Screens { get; set; }
+    }
+}

VCinema/Models/Watcher.cs

@@ -0,0 +1,16 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace VCinemaApi.Models
+{
+    public class Watcher
+    {
+        [Key]
+        public int WatcherId { get; set; }
+
+        [Required]
+        public string ConnectionId { get; set; }
+
+        public string Name { get; set; }
+        public Screen Screen { get; set; }
+    }
+}

VCinema/Program.cs

@@ -0,0 +1,20 @@
+using Microsoft.AspNetCore.Hosting;
+using Microsoft.Extensions.Hosting;
+
+namespace VCinemaApi
+{
+    public class Program
+    {
+        public static void Main(string[] args)
+        {
+            CreateHostBuilder(args).Build().Run();
+        }
+
+        public static IHostBuilder CreateHostBuilder(string[] args) =>
+            Host.CreateDefaultBuilder(args)
+                .ConfigureWebHostDefaults(webBuilder =>
+                {
+                    webBuilder.UseStartup<Startup>();
+                });
+    }
+}

VCinema/Properties/launchSettings.json

@@ -0,0 +1,30 @@
+{
+  "$schema": "http://json.schemastore.org/launchsettings.json",
+  "iisSettings": {
+    "windowsAuthentication": false,
+    "anonymousAuthentication": true,
+    "iisExpress": {
+      "applicationUrl": "http://localhost:36425",
+      "sslPort": 44359
+    }
+  },
+  "profiles": {
+    "IIS Express": {
+      "commandName": "IISExpress",
+      "launchBrowser": true,
+      "launchUrl": "weatherforecast",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    },
+    "VCinema": {
+      "commandName": "Project",
+      "launchBrowser": true,
+      "launchUrl": "weatherforecast",
+      "applicationUrl": "https://localhost:5001;http://localhost:5000",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    }
+  }
+}

VCinema/Repositories/IScreenRepository.cs

@@ -0,0 +1,14 @@
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using VCinemaApi.Models;
+
+namespace VCinemaApi.Repositories
+{
+    public interface IScreenRepository
+    {
+        IEnumerable<Screen> GetScreens();
+        Screen GetScreenById(int id);
+        Screen AddScreen(string name, string source);
+        void DeleteScreenById(int id);
+    }
+}

VCinema/Repositories/IWatcherRepository.cs

@@ -0,0 +1,17 @@
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using VCinemaApi.Models;
+
+namespace VCinemaApi.Repositories
+{
+    public interface IWatcherRepository
+    {
+        IEnumerable<Watcher> GetWatchersByScreenId(int screenId);
+        Watcher GetWatcherByConnectionId(string connectionId);
+        Watcher AddWatcher(string connectionId);
+        Watcher SetWatcherNameByConnectionId(string connectionId, string name);
+        Watcher SetWatcherScreenByConnectionId(string connectionId, int screenId);
+        Watcher UnsetWatcherScreenByConnectionId(string connectionId);
+        void DeleteWatcherByConnectionId(string connectionId);
+    }
+}

VCinema/Repositories/MockScreenRepository.cs

@@ -0,0 +1,64 @@
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using VCinemaApi.Models;
+
+namespace VCinemaApi.Repositories
+{
+    public class MockScreenRepository : IScreenRepository
+    {
+        public IEnumerable<Screen> GetScreens()
+        {
+            return new List<Screen>
+            {
+                new Screen {
+                    ScreenId = 1,
+                    Name = "Kirby's screen",
+                    Source = "https://vcinema.b-cdn.net/shrek.mp4",
+                    PlayStateUpdated = new DateTime(2020, 9, 21, 21, 02, 57),
+                    PlayState = true,
+                    PlayOffset = 1337
+                },
+                new Screen {
+                    ScreenId = 2,
+                    Name = "Sid's screen",
+                    Source = "https://vcinema.b-cdn.net/weeb.mp4",
+                    PlayStateUpdated = new DateTime(2020, 9, 21, 21, 03, 22),
+                    PlayState = true,
+                    PlayOffset = 69
+                }
+            };
+        }
+
+        public Screen GetScreenById(int id)
+        {
+            return new Screen
+            {
+                ScreenId = id,
+                Name = "Kirby's screen",
+                Source = "https://vcinema.b-cdn.net/shrek.mp4",
+                PlayStateUpdated = DateTime.UtcNow,
+                PlayState = true,
+                PlayOffset = 1337
+            };
+        }
+
+        public Screen AddScreen(string name, string source)
+        {
+            return new Screen
+            {
+                ScreenId = 1,
+                Name = name,
+                Source = source,
+                PlayStateUpdated = DateTime.UtcNow,
+                PlayState = true,
+                PlayOffset = 1337
+            };
+        }
+
+        public void DeleteScreenById(int screenId)
+        {
+
+        }
+    }
+}

VCinema/Repositories/MockWatcherRepository.cs

@@ -0,0 +1,109 @@
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using VCinemaApi.Models;
+
+namespace VCinemaApi.Repositories
+{
+    public class MockWatcherRepository : IWatcherRepository
+    {
+        public IEnumerable<Watcher> GetWatchersByScreenId(int screenId)
+        {
+            var screen = new Screen
+            {
+                ScreenId = 1,
+                Name = "Kirby's screen",
+                Source = "https://vcinema.b-cdn.net/shrek.mp4",
+                PlayStateUpdated = new DateTime(2020, 9, 21, 21, 02, 57),
+                PlayState = true,
+                PlayOffset = 1337
+            };
+
+            return new List<Watcher>
+            {
+                new Watcher
+                {
+                    WatcherId = 1,
+                    ConnectionId = "dJSbEc73n6YjGIhj-SZz1Q",
+                    Name = "Kirby",
+                    Screen = screen
+                },
+                new Watcher
+                {
+                    WatcherId = 2,
+                    ConnectionId = "rNA9Jn7ytYPzQfFJ-j3NBa",
+                    Name = "Jack",
+                    Screen = screen
+                }
+            };
+        }
+
+        public Watcher GetWatcherByConnectionId(string connectionId)
+        {
+            return new Watcher
+            {
+                WatcherId = 1,
+                ConnectionId = "dJSbEc73n6YjGIhj-SZz1Q",
+                Name = "Kirby",
+                Screen = null
+            };
+        }
+
+        public Watcher AddWatcher(string connectionId)
+        {
+            return new Watcher
+            {
+                WatcherId = 1,
+                ConnectionId = connectionId,
+                Name = "Kirby",
+                Screen = null
+            };
+        }
+
+        public Watcher SetWatcherName(string connectionId, string name)
+        {
+            return new Watcher
+            {
+                WatcherId = 1,
+                ConnectionId = connectionId,
+                Name = "Kirby",
+                Screen = null
+            };
+        }
+
+        public Watcher SetWatcherScreen(string connectionId, int screenId)
+        {
+            return new Watcher
+            {
+                WatcherId = 1,
+                ConnectionId = connectionId,
+                Name = "Kirby",
+                Screen = new Screen
+                {
+                    ScreenId = screenId,
+                    Name = "Kirby's screen",
+                    Source = "https://vcinema.b-cdn.net/shrek.mp4",
+                    PlayStateUpdated = new DateTime(2020, 9, 21, 21, 02, 57),
+                    PlayState = true,
+                    PlayOffset = 1337
+                }
+            };
+        }
+
+        public Watcher UnsetWatcherScreen(string connectionId)
+        {
+            return new Watcher
+            {
+                WatcherId = 1,
+                ConnectionId = connectionId,
+                Name = "Kirby",
+                Screen = null
+            };
+        }
+
+        public void DeleteWatcher(string connectionId)
+        {
+
+        }
+    }
+}

VCinema/Repositories/ScreenRepository.cs

@@ -0,0 +1,47 @@
+using System.Collections.Generic;
+using System.Linq;
+using VCinemaApi.Models;
+
+namespace VCinemaApi.Repositories
+{
+    public class ScreenRepository : IScreenRepository
+    {
+        private readonly VCinemaContext _context;
+
+        public ScreenRepository(VCinemaContext context)
+        {
+            _context = context;
+        }
+
+        public IEnumerable<Screen> GetScreens()
+        {
+            return _context.Screens.ToList();
+        }
+
+        public Screen GetScreenById(int id)
+        {
+            return _context.Screens.Find(id);
+        }
+
+        public Screen AddScreen(string name, string source)
+        {
+            var screen = new Screen
+            {
+                Name = name,
+                Source = source
+            };
+
+            _context.Screens.Add(screen);
+            _context.SaveChanges();
+
+            return screen;
+        }
+
+        public void DeleteScreenById(int screenId)
+        {
+            var screen = GetScreenById(screenId);
+            _context.Screens.Remove(screen);
+            _context.SaveChanges();
+        }
+    }
+}

VCinema/Repositories/WatcherRepository.cs

@@ -0,0 +1,77 @@
+using System.Collections.Generic;
+using System.Linq;
+using VCinemaApi.Models;
+
+namespace VCinemaApi.Repositories
+{
+    public class WatcherRepository : IWatcherRepository
+    {
+        private readonly VCinemaContext _context;
+
+        public WatcherRepository(VCinemaContext context)
+        {
+            _context = context;
+        }
+
+        public IEnumerable<Watcher> GetWatchersByScreenId(int screenId)
+        {
+            return _context.Watchers.Where(watcher => watcher.Screen.ScreenId == screenId);
+        }
+
+        public Watcher GetWatcherByConnectionId(string connectionId)
+        {
+            return _context.Watchers.SingleOrDefault(watcher => watcher.ConnectionId == connectionId);
+        }
+
+        public Watcher AddWatcher(string connectionId)
+        {
+            var watcher = new Watcher()
+            {
+                ConnectionId = connectionId,
+            };
+
+            _context.Watchers.Add(watcher);
+            _context.SaveChanges();
+
+            return watcher;
+        }
+
+        public Watcher SetWatcherNameByConnectionId(string connectionId, string name)
+        {
+            var watcher = GetWatcherByConnectionId(connectionId);
+
+            watcher.Name = name;
+            _context.SaveChanges();
+
+            return watcher;
+        }
+
+        public Watcher SetWatcherScreenByConnectionId(string connectionId, int screenId)
+        {
+            var watcher = GetWatcherByConnectionId(connectionId);
+            var screen = _context.Screens.Find(screenId);
+
+            watcher.Screen = screen;
+            _context.SaveChanges();
+
+            return watcher;
+        }
+
+        public Watcher UnsetWatcherScreenByConnectionId(string connectionId)
+        {
+            var watcher = GetWatcherByConnectionId(connectionId);
+
+            watcher.Screen = null;
+            _context.SaveChanges();
+
+            return watcher;
+        }
+
+        public void DeleteWatcherByConnectionId(string connectionId)
+        {
+            var watcher = GetWatcherByConnectionId(connectionId);
+            _context.Watchers.Remove(watcher);
+            _context.SaveChanges();
+        }
+    }
+}

VCinema/Startup.cs

@@ -0,0 +1,52 @@
+using Microsoft.AspNetCore.Builder;
+using Microsoft.AspNetCore.Hosting;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
+using VCinemaApi.Hubs;
+using VCinemaApi.Models;
+using VCinemaApi.Repositories;
+
+namespace VCinemaApi
+{
+    public class Startup
+    {
+        public Startup(IConfiguration configuration)
+        {
+            Configuration = configuration;
+        }
+
+        public IConfiguration Configuration { get; }
+
+        // This method gets called by the runtime. Use this method to add services to the container.
+        public void ConfigureServices(IServiceCollection services)
+        {
+            services.AddDbContext<VCinemaContext>(options => options.UseInMemoryDatabase("VCinema"));
+            services.AddScoped<IScreenRepository, ScreenRepository>();
+            services.AddScoped<IWatcherRepository, WatcherRepository>();
+            services.AddControllers();
+            services.AddSignalR();
+        }
+
+        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
+        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
+        {
+            if (env.IsDevelopment())
+            {
+                app.UseDeveloperExceptionPage();
+            }
+
+            //app.UseHttpsRedirection();
+            app.UseDefaultFiles();
+            app.UseStaticFiles();
+            app.UseRouting();
+            app.UseAuthorization();
+            app.UseEndpoints(endpoints =>
+            {
+                endpoints.MapHub<VCinemaHub>("/vcinemahub");
+                endpoints.MapControllers();
+            });
+        }
+    }
+}

VCinema/VCinemaApi.csproj

@@ -0,0 +1,27 @@
+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+  </PropertyGroup>
+
+
+  <PropertyGroup Condition=" '$(RunConfiguration)' == 'VCinema' " />
+  <ItemGroup>
+    <Folder Include="Models\" />
+    <Folder Include="Hubs\" />
+    <Folder Include="wwwroot\" />
+    <Folder Include="wwwroot\js\" />
+    <Folder Include="Repositories\" />
+  </ItemGroup>
+  <ItemGroup>
+    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="3.1.8" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.InMemory" Version="3.1.8" />
+    <PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="3.1.4" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="3.1.8" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="3.1.8">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="3.1.8" />
+  </ItemGroup>
+</Project>

VCinema/appsettings.Development.json

@@ -0,0 +1,9 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft": "Warning",
+      "Microsoft.Hosting.Lifetime": "Information"
+    }
+  }
+}

VCinema/appsettings.json

@@ -0,0 +1,10 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft": "Warning",
+      "Microsoft.Hosting.Lifetime": "Information"
+    }
+  },
+  "AllowedHosts": "*"
+}

VCinema/libman.json

@@ -0,0 +1,14 @@
+{
+  "version": "1.0",
+  "defaultProvider": "unpkg",
+  "libraries": [
+    {
+      "library": "@microsoft/signalr@latest",
+      "destination": "wwwroot/js/signalr",
+      "files": [
+        "dist/browser/signalr.js",
+        "dist/browser/signalr.min.js"
+      ]
+    }
+  ]
+}

VCinema/wwwroot/index.html

@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <meta charset="utf-8" />
+    <title></title>
+    <script src="/js/signalr/dist/browser/signalr.js"></script>
+</head>
+<body>
+    Hello, World! :-)
+    <script>
+        var connection = new signalR.HubConnectionBuilder().withUrl("/vcinemahub").build();
+
+        connection.on("GetScreens", function (obj) {
+            console.log(obj);
+        });
+
+        connection.start();
+
+    </script>
+</body>
+</html>