src/marlin.web/Data/JsonValueComparer.cs


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namespace marlin.web.Data;

using System.Text.Json;
using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.ChangeTracking;
using Microsoft.EntityFrameworkCore.Metadata.Builders;

public static class JsonValueComparer
{
    public static ValueComparer<T> Create<T>() => new(
        (a, b) => JsonSerializer.Serialize(a, (JsonSerializerOptions?)null) == JsonSerializer.Serialize(b, (JsonSerializerOptions?)null),
        v => JsonSerializer.Serialize(v, (JsonSerializerOptions?)null).GetHashCode(),
        v => JsonSerializer.Deserialize<T>(JsonSerializer.Serialize(v, (JsonSerializerOptions?)null), (JsonSerializerOptions?)null)!);
}

public static class PropertyBuilderExtensions
{
    public static PropertyBuilder<T> HasJsonConversion<T>(this PropertyBuilder<T> builder) =>
        builder.HasConversion(
            v => JsonSerializer.Serialize(v, (JsonSerializerOptions?)null),
            v => JsonSerializer.Deserialize<T>(v, (JsonSerializerOptions?)null)!,
            JsonValueComparer.Create<T>());
}