Add Bson serialization

Consumers.sln.DotSettings

@@ -1,4 +1,5 @@
 <wpf:ResourceDictionary xml:space="preserve" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:s="clr-namespace:System;assembly=mscorlib" xmlns:ss="urn:shemas-jetbrains-com:settings-storage-xaml" xmlns:wpf="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
+	<s:Boolean x:Key="/Default/CodeInspection/ExcludedFiles/SourceGeneratedFilesSweaEnabled/@EntryValue">False</s:Boolean>
 	<s:String x:Key="/Default/CodeInspection/Highlighting/InspectionSeverities/=CheckNamespace/@EntryIndexedValue">DO_NOT_SHOW</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/PredefinedNamingRules/=TypesAndNamespaces/@EntryIndexedValue">&lt;Policy Inspect="True" Prefix="" Suffix="" Style="AaBb_AaBb" /&gt;</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/UserRules/=a0b4bc4d_002Dd13b_002D4a37_002Db37e_002Dc9c6864e4302/@EntryIndexedValue">&lt;Policy&gt;&lt;Descriptor Staticness="Any" AccessRightKinds="Any" Description="Types and namespaces"&gt;&lt;ElementKinds&gt;&lt;Kind Name="NAMESPACE" /&gt;&lt;Kind Name="CLASS" /&gt;&lt;Kind Name="STRUCT" /&gt;&lt;Kind Name="ENUM" /&gt;&lt;Kind Name="DELEGATE" /&gt;&lt;/ElementKinds&gt;&lt;/Descriptor&gt;&lt;Policy Inspect="True" Prefix="" Suffix="" Style="AaBb_AaBb" /&gt;&lt;/Policy&gt;</s:String>

docs/site/Writerside/hi.tree

@@ -31,6 +31,7 @@
         <toc-element topic="Casting.md"/>
         <toc-element topic="Overriding-methods.md"/>
         <toc-element topic="EfCoreIntegrationHowTo.md"/>
+        <toc-element topic="MongoIntegrationHowTo.md"/>
         <toc-element topic="Use-in-Swagger.md"/>
         <toc-element topic="efcore-tips.md"/>
     </toc-element>

docs/site/Writerside/topics/reference/EfCoreIntegrationHowTo.md

@@ -15,7 +15,7 @@ public partial class Name
 ```
 
 Another way, if you're using .NET 8 or greater, is to use `EfCoreConverter` attributes on
-a marker class:
+a marker class, normally in a separate project from the value objects themselves:
 
 ```c#
 [EfCoreConverter<Domain.CustomerId>]

docs/site/Writerside/topics/reference/Integration.md

@@ -73,7 +73,12 @@ public enum Conversions
     /// <summary>
     /// Sets the SerializeFn and DeSerializeFn members in JsConfig in a static constructor.
     /// </summary>
-    ServiceStackDotText = 1 << 7
+    ServiceStackDotText = 1 << 7,
+
+    /// <summary>
+    /// Creates a BSON serializer for each value object.
+    /// </summary>
+    Bson = 1 << 8,
 }
 ```
 
@@ -93,7 +98,8 @@ Other converters/serializers are:
 They are controlled by the `Conversions` enum. The following has serializers for NSJ and STJ:
 
 ```c#
-[ValueObject(conversions: Conversions.NewtonsoftJson | Conversions.SystemTextJson, underlyingType: typeof(float))]
+[ValueObject<float>(conversions:
+    Conversions.NewtonsoftJson | Conversions.SystemTextJson)]
 public readonly partial struct Celsius { }
 ```
 

docs/site/Writerside/topics/reference/MongoIntegrationHowTo.md

@@ -0,0 +1,57 @@
+# Integration with MongoDB
+
+It is possible to use value objects (VOs) in MongoDB.
+
+To generate a converter (serializer), add the `Bson` conversion in the attribute, e.g.
+
+```c#
+[ValueObject<string>(conversions: Conversions.Bson)]
+public partial class Name
+{
+    public static readonly Name NotSet = new("[NOT_SET]");
+}
+```
+
+Now that the serializers are generated, you now need to register them.
+Vogen generates a static class named `RegisterBsonSerializersFor[NameOfProject]`.
+This static class has a static method named `TryRegister`, which registers the serializers if they're not already registered, e.g.: 
+
+```C#
+BsonSerializer.TryRegisterSerializer(new CustomerIdBsonSerializer());
+BsonSerializer.TryRegisterSerializer(new EnergyUsedBsonSerializer());
+```
+A [MongoDB example is included in the source](https://github.com/SteveDunn/Vogen/tree/main/samples/Vogen.Examples/SerializationAndConversion/MongoScenario).
+
+Below is a walkthrough of that sample.
+
+The sample uses MongoDB to read and write entities (a `Person`) to a MongoDB database in a testcontainer.
+Note that attributes on the value objects do not specify the BSON serializer; that is specified in global config in `ModuleInitializer.cs`:
+
+```c#
+[ValueObject]
+public readonly partial struct Age;
+
+[ValueObject<string>]
+public readonly partial struct Name;
+
+public class Person
+{
+    public Name Name { get; set; }
+    public Age Age { get; set; }
+}
+```
+
+This simple example registers the serializers manually:
+```C#
+BsonSerializer.RegisterSerializer(new NameBsonSerializer());
+BsonSerializer.RegisterSerializer(new AgeBsonSerializer());
+```
+
+… but it could just as easily registered them with the generated register:
+```C#
+BsonSerializationRegisterForVogen_Examples.TryRegister();
+```
+
+(_replace `Vogen_Examples` with the name of *your* project_)
+
+Next, it adds a bunch of `Person` objects to the database, each containing value objects representing age and name, and then reads them back.

samples/AotTrimmedSample/AotTrimmedSample.v3.ncrunchproject

@@ -0,0 +1,5 @@
+<ProjectConfiguration>
+  <Settings>
+    <IgnoreThisComponentCompletely>True</IgnoreThisComponentCompletely>
+  </Settings>
+</ProjectConfiguration>

samples/Onion/Domain/Domain.v3.ncrunchproject

@@ -0,0 +1,5 @@
+<ProjectConfiguration>
+  <Settings>
+    <IgnoreThisComponentCompletely>True</IgnoreThisComponentCompletely>
+  </Settings>
+</ProjectConfiguration>

samples/Onion/Infra/Infra.v3.ncrunchproject

@@ -0,0 +1,5 @@
+<ProjectConfiguration>
+  <Settings>
+    <IgnoreThisComponentCompletely>True</IgnoreThisComponentCompletely>
+  </Settings>
+</ProjectConfiguration>

samples/Vogen.Examples/ModuleInitializer.cs

@@ -5,7 +5,9 @@
 using Vogen;
 using Vogen.Examples.Types;
 
-[assembly: VogenDefaults(staticAbstractsGeneration: StaticAbstractsGeneration.MostCommon)]
+[assembly: VogenDefaults(
+    staticAbstractsGeneration: StaticAbstractsGeneration.MostCommon | StaticAbstractsGeneration.InstanceMethodsAndProperties, 
+    conversions: Conversions.Default | Conversions.Bson)]
 
 namespace Vogen.Examples;
 
@@ -14,7 +16,8 @@ public static class ModuleInitializer
     [ModuleInitializer]
     public static void Init()
     {
-        MappingSchema.Default.SetConverter<DateTime, TimeOnly>(dt => TimeOnly.FromDateTime(dt));
+        MappingSchema.Default.SetConverter<DateTime, TimeOnly>(TimeOnly.FromDateTime);
+
         SqlMapper.AddTypeHandler(new DapperDateTimeOffsetVo.DapperTypeHandler());
         SqlMapper.AddTypeHandler(new DapperIntVo.DapperTypeHandler());
         SqlMapper.AddTypeHandler(new DapperStringVo.DapperTypeHandler());

samples/Vogen.Examples/Program.cs

@@ -7,22 +7,20 @@ namespace Vogen.Examples
     class Program
     {
         // ReSharper disable once UnusedParameter.Local
-        static Task Main(string[] args)
+        static async Task Main(string[] args)
         {
             var scenarioTypes = typeof(Program).Assembly.GetTypes()
                 .Where(t => typeof(IScenario).IsAssignableFrom(t) && t != typeof(IScenario)).ToList();
 
             foreach (var eachScenarioType in scenarioTypes)
             {
-                var instance = (IScenario)Activator.CreateInstance(eachScenarioType);
+                var instance = (IScenario)Activator.CreateInstance(eachScenarioType)!;
                 WriteBanner(instance);
 
-                instance!.Run();
+                await instance.Run();
             }
 
             Console.WriteLine("Finished");
-
-            return Task.CompletedTask;
         }
 
         private static void WriteBanner(IScenario scenario)

samples/Vogen.Examples/SerializationAndConversion/Mongo/MongoScenario.cs

@@ -0,0 +1,98 @@
+using System;
+using System.Linq;
+using System.Threading.Tasks;
+using Bogus;
+using JetBrains.Annotations;
+using MongoDB.Bson;
+using MongoDB.Bson.Serialization;
+using MongoDB.Bson.Serialization.Attributes;
+using MongoDB.Bson.Serialization.Serializers;
+using MongoDB.Driver;
+using Testcontainers.MongoDb;
+
+namespace Vogen.Examples.SerializationAndConversion.Mongo;
+
+
+[ValueObject]
+public readonly partial struct Age;
+
+[ValueObject<string>]
+public readonly partial struct Name;
+
+[UsedImplicitly]
+public class Person
+{
+    [BsonId]
+    public ObjectId Id { get; set; }
+    public Name Name { get; set; }
+    public Age Age { get; set; }
+}
+
+[UsedImplicitly]
+public class MongoScenario : IScenario
+{
+    public async Task Run()
+    {
+        string runnerOs = Environment.GetEnvironmentVariable("RUNNER_OS");
+
+        bool isLocalOrLinuxOnGitHub = string.IsNullOrEmpty(runnerOs) || runnerOs == "Linux";
+
+        if (!isLocalOrLinuxOnGitHub)
+        {
+            Console.WriteLine("Skipping because not running locally or on Linux on a GitHub action.");
+            return;
+        }
+
+        MongoDbContainer container = new MongoDbBuilder().WithImage("mongo:latest").Build();
+
+        await container.StartAsync();
+
+        var client = new MongoClient(container.GetConnectionString());
+
+        var database = client.GetDatabase("testDatabase");
+        var collection = database.GetCollection<Person>("peopleCollection");
+
+        BsonSerializer.RegisterSerializer(new NameBsonSerializer());
+        BsonSerializer.RegisterSerializer(new AgeBsonSerializer());
+
+        // or, use the generated one for all value objects...
+        // BsonSerializationRegisterForVogen_Examples.TryRegister();
+
+        var personFaker = new Faker<Person>()
+            .RuleFor(p => p.Name, f => Name.From(f.Name.FirstName()))
+            .RuleFor(p => p.Age, f => Age.From(DateTime.Now.Year - f.Person.DateOfBirth.Year));
+
+        foreach (Person eachPerson in personFaker.Generate(10))
+        {
+            await collection.InsertOneAsync(eachPerson);
+        }
+
+        Console.WriteLine("Inserted people... Now finding them...");
+
+        IAsyncCursor<Person> people = await collection.FindAsync("{}");
+        await people.ForEachAsync((person) => Console.WriteLine($"{person.Name} is {person.Age}"));
+
+        await container.DisposeAsync();
+    }
+}
+
+
+
+// Note, if you don't want any generated BSON serializers, you can specify your own generic one like the one below.
+// Be aware that you'll need specify static abstracts generation in global config for this to work:
+// [assembly: VogenDefaults(
+//      staticAbstractsGeneration: StaticAbstractsGeneration.MostCommon | StaticAbstractsGeneration.InstanceMethodsAndProperties, 
+//      conversions: Conversions.Default | Conversions.Bson)]
+
+ // ReSharper disable once UnusedType.Global
+ public class BsonVogenSerializer<TValue, TUnderlyingTypeValue>  
+    : SerializerBase<TValue> where TValue : IVogen<TValue, TUnderlyingTypeValue>
+{
+    private readonly IBsonSerializer<TUnderlyingTypeValue> _serializer = BsonSerializer.LookupSerializer<TUnderlyingTypeValue>();
+
+    public override TValue Deserialize(BsonDeserializationContext context, BsonDeserializationArgs args) => 
+        TValue.From(_serializer.Deserialize(context, args));
+
+    public override void Serialize(BsonSerializationContext context, BsonSerializationArgs args, TValue value) => 
+        _serializer.Serialize(context, args, value.Value);
+}

samples/Vogen.Examples/Vogen.Examples.csproj

@@ -9,6 +9,7 @@
 	</PropertyGroup>
 
 	<ItemGroup>
+		<PackageReference Include="Bogus" Version="35.6.0" />
 		<PackageReference Include="GitHubActionsTestLogger" Version="2.3.3">
 			<PrivateAssets>all</PrivateAssets>
 			<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
@@ -17,11 +18,14 @@
 		<PackageReference Include="Microsoft.EntityFrameworkCore" Version="7.0.5" />
 		<PackageReference Include="Microsoft.EntityFrameworkCore.InMemory" Version="7.0.5" />
 		<PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="7.0.0-rc.1.22426.7" />
+		<PackageReference Include="MongoDB.Driver" Version="2.27.0" />
 		<PackageReference Include="System.Text.Json" Version="8.0.4" />
 		<PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
 		<PackageReference Include="Dapper" Version="2.0.123" />
 		<PackageReference Include="linq2db" Version="3.7.0" />
 		<PackageReference Include="ServiceStack.Text" Version="8.2.2" />
+		<PackageReference Include="Testcontainers" Version="3.9.0" />
+		<PackageReference Include="Testcontainers.MongoDb" Version="3.9.0" />
 	</ItemGroup>
 
 	<ItemGroup Condition=" '$(UseLocallyBuiltPackage)' != ''">

samples/WebApplication/WebApplication.net8.0.v3.ncrunchproject

@@ -0,0 +1,5 @@
+<ProjectConfiguration>
+  <Settings>
+    <IgnoreThisComponentCompletely>True</IgnoreThisComponentCompletely>
+  </Settings>
+</ProjectConfiguration>

samples/WebApplication/WebApplication.net9.0.v3.ncrunchproject

@@ -0,0 +1,5 @@
+<ProjectConfiguration>
+  <Settings>
+    <IgnoreThisComponentCompletely>True</IgnoreThisComponentCompletely>
+  </Settings>
+</ProjectConfiguration>

samples/WebApplicationConsumer/WebApplicationConsumer.v3.ncrunchproject

@@ -0,0 +1,5 @@
+<ProjectConfiguration>
+  <Settings>
+    <IgnoreThisComponentCompletely>True</IgnoreThisComponentCompletely>
+  </Settings>
+</ProjectConfiguration>

src/Vogen.SharedTypes/Conversions.cs

@@ -55,5 +55,10 @@ public enum Conversions
     /// <summary>
     /// Sets the SerializeFn and DeSerializeFn members in JsConfig in a static constructor.
     /// </summary>
-    ServiceStackDotText = 1 << 7
+    ServiceStackDotText = 1 << 7,
+
+    /// <summary>
+    /// Creates a BSON serializer for each value object.
+    /// </summary>
+    Bson = 1 << 8    
 }

src/Vogen/ValueObjectGenerator.cs

@@ -97,6 +97,8 @@ private static void Execute(
         WriteOpenApiSchemaCustomizationCode.WriteIfNeeded(globalConfig, spc, compilation, workItems);
 
         WriteEfCoreSpecs.WriteIfNeeded(spc, compilation, efCoreConverterSpecs);
+
+        WriteBsonSerializers.WriteIfNeeded(spc, compilation, workItems);
 
         if (workItems.Count > 0)
         {