adding

LCU.API.Internal.Document/OwnerNumberMigration/ValueParsing/CommaStringArrayStrategy.cs

@@ -0,0 +1,6 @@
+namespace OwnerNumberMigration.ValueParsing;
+
+public class CommaStringArrayStrategy : IValueParsingStrategy<string[]>
+{
+    public string[] Parse(string value) => value.Split(",");
+}

LCU.API.Internal.Document/OwnerNumberMigration/ValueParsing/IParsingStrategyFactory.cs

@@ -0,0 +1,6 @@
+namespace OwnerNumberMigration.ValueParsing;
+
+public interface IParsingStrategyFactory
+{
+    IValueParsingStrategy<T> CreateParsingStrategy<T>(string attribute);
+}

LCU.API.Internal.Document/OwnerNumberMigration/ValueParsing/IValueParsingStrategy.cs

@@ -0,0 +1,6 @@
+namespace OwnerNumberMigration.ValueParsing;
+
+public interface IValueParsingStrategy<out T>
+{
+    T Parse(string value);
+}

LCU.API.Internal.Document/OwnerNumberMigration/ValueParsing/ParsingStrategyFactory.cs

@@ -0,0 +1,23 @@
+using Microsoft.Extensions.DependencyInjection;
+
+namespace OwnerNumberMigration.ValueParsing;
+
+public class ParsingStrategyFactory : IParsingStrategyFactory
+{
+    private readonly IServiceProvider _services;
+
+    public ParsingStrategyFactory(IServiceProvider services)
+    {
+        _services = services;
+    }
+
+    public IValueParsingStrategy<T> CreateParsingStrategy<T>(string attribute) => attribute switch
+    {
+        "PersonNumber" => (IValueParsingStrategy<T>)_services.GetRequiredService<SingleValueArrayStrategy>(),
+        "PersonNumbers" => (IValueParsingStrategy<T>)_services.GetRequiredService<CommaStringArrayStrategy>(),
+        "OrganizationNumber" => (IValueParsingStrategy<T>)_services.GetRequiredService<SingleValueArrayStrategy>(),
+        "OrganizationNumbers" => (IValueParsingStrategy<T>)_services.GetRequiredService<CommaStringArrayStrategy>(),
+        "AccountNumber" => (IValueParsingStrategy<T>)_services.GetRequiredService<SingleValueStrategy>(),
+        _ => throw new NotImplementedException()
+    };
+}

LCU.API.Internal.Document/OwnerNumberMigration/ValueParsing/SingleValueArrayStrategy.cs

@@ -0,0 +1,6 @@
+namespace OwnerNumberMigration.ValueParsing;
+
+public class SingleValueArrayStrategy : IValueParsingStrategy<string[]>
+{
+    public string[] Parse(string value) => new[] { value };
+}

LCU.API.Internal.Document/OwnerNumberMigration/ValueParsing/SingleValueStrategy.cs

@@ -0,0 +1,6 @@
+namespace OwnerNumberMigration.ValueParsing;
+
+public class SingleValueStrategy : IValueParsingStrategy<string>
+{
+    public string Parse(string value) => value;
+}