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using System.Diagnostics;
using System.Text.Json;
using System.Text.Json.Serialization;
using Microsoft.Extensions.Options;
namespace CrupestApi.Commons.Crud;
// TODO: Register this.
/// <summary>
/// Contains all you need to do with json.
/// </summary>
public class EntityJsonHelper<TEntity> where TEntity : class
{
private readonly TableInfo _table;
private readonly JsonSerializerOptions _jsonSerializerOptions;
public EntityJsonHelper(TableInfoFactory tableInfoFactory)
{
_table = tableInfoFactory.Get(typeof(TEntity));
_jsonSerializerOptions = new JsonSerializerOptions();
_jsonSerializerOptions.AllowTrailingCommas = true;
_jsonSerializerOptions.PropertyNameCaseInsensitive = true;
_jsonSerializerOptions.PropertyNamingPolicy = JsonNamingPolicy.CamelCase;
foreach (var type in _table.Columns.Select(c => c.ColumnType))
{
if (type.JsonConverter is not null)
{
_jsonSerializerOptions.Converters.Add(type.JsonConverter);
}
}
}
public virtual Dictionary<string, object?> ConvertEntityToDictionary(object? entity)
{
Debug.Assert(entity is null || entity is TEntity);
var result = new Dictionary<string, object?>();
foreach (var column in _table.PropertyColumns)
{
var propertyInfo = column.PropertyInfo;
var value = propertyInfo!.GetValue(entity);
result[column.ColumnName] = value;
}
return result;
}
public virtual string ConvertEntityToJson(object? entity)
{
Debug.Assert(entity is null || entity is TEntity);
var dictionary = ConvertEntityToDictionary(entity);
return JsonSerializer.Serialize(dictionary, _jsonSerializerOptions);
}
}
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