initial commit

.github/config/gitversion.yml

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+next-version: 1.1.0
+mode: ContinuousDeployment
+assembly-versioning-scheme: MajorMinorPatch
+assembly-file-versioning-scheme: MajorMinorPatch
+
+branches:
+  main:
+    regex: ^main$
+    increment: Patch

.github/workflows/pull_request_dev.yml

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+name: Build NuGet package on dev branch pull request
+
+on:
+  pull_request:
+    branches:
+      - "dev"
+    paths:
+      - "TimetableDesigner.Backend.Events.OutboxPattern**"
+
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6.0.2
+      - name: Setup .NET
+        uses: actions/setup-dotnet@v3
+        with:
+          dotnet-version: 10.0.x
+      - name: Build
+        run: dotnet build

.github/workflows/pull_request_main.yml

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+name: Build NuGet package on main branch pull request
+
+on:
+  pull_request:
+    branches:
+      - "main"
+    paths:
+      - "TimetableDesigner.Backend.Events.OutboxPattern**"
+
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6.0.2
+      - name: Setup .NET
+        uses: actions/setup-dotnet@v3
+        with:
+          dotnet-version: 10.0.x
+      - name: Build
+        run: dotnet build

.github/workflows/push_dev.yml

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+name: Build NuGet package on dev branch push
+
+on:
+  push:
+    branches:
+      - "dev"
+    paths:
+      - "TimetableDesigner.Backend.Events.OutboxPattern**"
+
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6.0.2
+      - name: Setup .NET
+        uses: actions/setup-dotnet@v3
+        with:
+          dotnet-version: 10.0.x
+      - name: Build
+        run: dotnet build

.github/workflows/push_main.yml

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+name: Build NuGet package on main branch push
+
+on:
+  push:
+    branches:
+      - "main"
+    paths:
+      - "TimetableDesigner.Backend.Events.OutboxPattern**"
+
+jobs:
+  build:
+    name: Build and pack
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6.0.2
+        with:
+          fetch-depth: 0
+      - name: Setup .NET
+        uses: actions/setup-dotnet@v3
+        with:
+          dotnet-version: 10.0.x
+      - name: Build
+        run: dotnet build
+      - name: Setup GitVersion
+        uses: gittools/actions/gitversion/setup@v4.2.0
+        with:
+          versionSpec: 6.4.x
+      - name: Determine version
+        uses: gittools/actions/gitversion/execute@v4.2.0
+        id: gitversion
+        with:
+          configFilePath: ./.github/config/gitversion.yml
+      - name: Create NuGet package
+        run: dotnet pack -c Release -p:Version=${{steps.gitversion.outputs.SemVer}} -p:PackageVersion=${{steps.gitversion.outputs.SemVer}} --output ${{ github.workspace}}/nuget
+      - name: Upload artifact
+        uses: actions/upload-artifact@v6
+        with:
+          name: nuget
+          path: ${{ github.workspace}}/nuget/*.nupkg
+    outputs:
+      version: ${{ steps.gitversion.outputs.SemVer }}
+  publish:
+    name: Publish 
+    permissions: write-all
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - name: Download artifact
+        uses: actions/download-artifact@v6
+        with:
+          name: nuget
+          path: ${{ github.workspace}}/nuget
+      - name: Setup .NET
+        uses: actions/setup-dotnet@v3
+        with:
+          dotnet-version: 10.0.x
+      - name: Add source
+        run: dotnet nuget add source --username TimetableDesigner --password ${{secrets.GITHUB_TOKEN }} --store-password-in-clear-text --name github "https://nuget.pkg.github.com/TimetableDesigner/index.json"
+      - name: Publish
+        run: dotnet nuget push ${{ github.workspace}}/nuget/*.nupkg --source "github" --api-key ${{ secrets.NUGET_REGISTRY_API_KEY }} --skip-duplicate
+      - name: Create Release
+        uses: actions/create-release@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          tag_name: ${{needs.build.outputs.version}}
+          release_name: ${{needs.build.outputs.version}}
+          draft: false
+          prerelease: false
+        
+      

.gitignore

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+## 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/
+x64/
+x86/
+bld/
+[Bb]in/
+[Oo]bj/
+[Ll]og/
+
+# Visual Studio 2015 cache/options directory
+.vs/
+# Uncomment if you have tasks that create the project's static files in wwwroot
+#wwwroot/
+
+# 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
+
+# .NET Core
+project.lock.json
+project.fragment.lock.json
+artifacts/
+**/Properties/launchSettings.json
+
+# VS Code
+.vscode/
+
+*_i.c
+*_p.c
+*_i.h
+*.ilk
+*.meta
+*.obj
+*.pch
+*.pdb
+*.pgc
+*.pgd
+*.rsp
+*.sbr
+*.tlb
+*.tli
+*.tlh
+*.tmp
+*.tmp_proj
+*.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
+
+# 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
+
+# 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
+# TODO: 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
+**/packages/*
+# except build/, which is used as an MSBuild target.
+!**/packages/build/
+# Uncomment if necessary however generally it will be regenerated when needed
+#!**/packages/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
+
+# 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
+
+# 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
+
+# SQL Server files
+*.mdf
+*.ldf
+
+# Business Intelligence projects
+*.rdl.data
+*.bim.layout
+*.bim_*.settings
+
+# Microsoft Fakes
+FakesAssemblies/
+
+# GhostDoc plugin setting file
+*.GhostDoc.xml
+
+# Node.js Tools for Visual Studio
+.ntvs_analysis.dat
+node_modules/
+
+# Typescript v1 declaration files
+typings/
+
+# 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
+.cr/
+
+# Python Tools for Visual Studio (PTVS)
+__pycache__/
+*.pyc
+
+# Cake - Uncomment if you are using it
+# tools/**
+# !tools/packages.config
+
+# Telerik's JustMock configuration file
+*.jmconfig
+
+# BizTalk build output
+*.btp.cs
+*.btm.cs
+*.odx.cs
+*.xsd.cs

TimetableDesigner.Backend.Events.OutboxPattern.slnx

@@ -0,0 +1,3 @@
+<Solution>
+  <Project Path="TimetableDesigner.Backend.Events.OutboxPattern/TimetableDesigner.Backend.Events.OutboxPattern.csproj" />
+</Solution>

TimetableDesigner.Backend.Events.OutboxPattern/Event.cs

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+using System.Text.Json;
+
+namespace TimetableDesigner.Backend.Events.OutboxPattern;
+
+public class Event
+{
+    public Guid Id { get; set; }
+    public required string Payload { get; set; }
+    public required string PayloadType { get; set; }
+    public DateTimeOffset OccuredOn { get; set; } = DateTimeOffset.UtcNow;
+    public DateTimeOffset? LastRetryOn { get; set; }
+    public uint RetryCount { get; set; }
+    
+    public Event(object payload)
+    {
+        Payload = JsonSerializer.Serialize(payload);
+        PayloadType = payload.GetType().FullName!;
+    }
+}

TimetableDesigner.Backend.Events.OutboxPattern/EventConfiguration.cs

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+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+
+namespace TimetableDesigner.Backend.Events.OutboxPattern;
+
+public class EventConfiguration : IEntityTypeConfiguration<Event>
+{
+    public void Configure(EntityTypeBuilder<Event> builder)
+    {
+        builder.HasKey(x => x.Id);
+        builder.HasIndex(x => x.Id)
+               .IsUnique();
+        builder.Property(x => x.Id)
+               .IsRequired();
+        
+        builder.Property(x => x.Payload)
+               .IsRequired();
+        
+        builder.Property(x => x.PayloadType)
+               .IsRequired();
+        
+        builder.Property(x => x.OccuredOn)
+               .IsRequired();
+        
+        builder.Property(x => x.LastRetryOn);
+        
+        builder.Property(x => x.RetryCount)
+               .IsRequired();
+    }
+}

TimetableDesigner.Backend.Events.OutboxPattern/EventOutboxSender.cs

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+using System.Text.Json;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Hosting;
+
+namespace TimetableDesigner.Backend.Events.OutboxPattern;
+
+public class EventOutboxSender<TDbContext> : BackgroundService where TDbContext : DbContext, IEventOutboxDbContext
+{
+    private readonly TDbContext  _databaseContext;
+    private readonly IEventQueuePublisher _eventQueuePublisher;
+    
+    public EventOutboxSender(TDbContext databaseContext, IEventQueuePublisher eventQueuePublisher)
+    {
+        _databaseContext = databaseContext;
+        _eventQueuePublisher = eventQueuePublisher;
+    }
+    
+    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
+    {
+        while (!stoppingToken.IsCancellationRequested)
+        {
+            Event? eventData = await _databaseContext.Events.FirstOrDefaultAsync(x => x.LastRetryOn == null, stoppingToken)
+                            ?? await _databaseContext.Events.OrderBy(x => x.LastRetryOn).FirstOrDefaultAsync(stoppingToken);
+
+            if (eventData is null)
+            {
+                continue;
+            }
+            
+            Type payloadType = Type.GetType(eventData.PayloadType)!;
+            JsonSerializer.Deserialize(eventData.Payload, payloadType);
+
+            try
+            {
+                await _eventQueuePublisher.PublishAsync(eventData.Payload, payloadType);
+                    
+                _databaseContext.Events.Remove(eventData);
+            }
+            catch
+            {
+                eventData.LastRetryOn = DateTimeOffset.UtcNow;
+                eventData.RetryCount++;
+            }
+            finally
+            {
+                await _databaseContext.SaveChangesAsync(stoppingToken);
+            }
+        }
+    }
+}

TimetableDesigner.Backend.Events.OutboxPattern/IEventOutboxDbContext.cs

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+using Microsoft.EntityFrameworkCore;
+
+namespace TimetableDesigner.Backend.Events.OutboxPattern;
+
+public interface IEventOutboxDbContext
+{
+    DbSet<Event> Events { get; }
+}

TimetableDesigner.Backend.Events.OutboxPattern/TimetableDesigner.Backend.Events.OutboxPattern.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>net10.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+        <Version />
+        <Title>TimetableDesigner.Backend.Events.OutboxPattern</Title>
+        <Authors>Mateusz Skoczek</Authors>
+        <PackageProjectUrl>https://github.com/TimetableDesigner</PackageProjectUrl>
+        <PackageIcon>icon.png</PackageIcon>
+        <RepositoryUrl>https://github.com/TimetableDesigner/TimetableDesigner.Backend.Events.OutboxPattern</RepositoryUrl>
+    </PropertyGroup>
+
+    <ItemGroup>
+      <PackageReference Include="Microsoft.EntityFrameworkCore" Version="10.0.2" />
+      <PackageReference Include="Microsoft.Extensions.Hosting" Version="10.0.2" />
+      <PackageReference Include="TimetableDesigner.Backend.Events" Version="1.1.4" />
+    </ItemGroup>
+
+</Project>