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using System.Text.Json;
using Microsoft.Extensions.Options;
namespace CrupestApi.Commons;
public static class CrupestApiJsonExtensions
{
public static object? CheckJsonValueNotArrayOrObject(this JsonElement value)
{
if (value.ValueKind == JsonValueKind.Null && value.ValueKind == JsonValueKind.Undefined)
{
return null;
}
else if (value.ValueKind == JsonValueKind.True)
{
return true;
}
else if (value.ValueKind == JsonValueKind.False)
{
return false;
}
else if (value.ValueKind == JsonValueKind.Number)
{
return value.GetDouble();
}
else if (value.ValueKind == JsonValueKind.String)
{
return value.GetString();
}
else
{
throw new Exception("Only value not array or object is allowed.")
}
}
public static IServiceCollection AddJsonOptions(this IServiceCollection services)
{
services.AddOptions<JsonSerializerOptions>();
services.Configure<JsonSerializerOptions>(config =>
{
config.AllowTrailingCommas = true;
config.PropertyNameCaseInsensitive = true;
config.PropertyNamingPolicy = JsonNamingPolicy.CamelCase;
});
// TODO: Register column type provided converters.
return services;
}
public static async Task WriteJsonAsync<T>(this HttpResponse response, T bodyObject, int statusCode, HttpResponseAction? beforeWriteBody, CancellationToken cancellationToken = default)
{
await response.WriteJsonAsync(bodyObject, statusCode, (context) =>
{
beforeWriteBody?.Invoke(context);
return Task.CompletedTask;
}, cancellationToken);
}
public static async Task WriteJsonAsync<T>(this HttpResponse response, T bodyObject, int statusCode = 200, AsyncHttpResponseAction? beforeWriteBody = null, CancellationToken cancellationToken = default)
{
var jsonOptions = response.HttpContext.RequestServices.GetRequiredService<IOptionsSnapshot<JsonSerializerOptions>>();
byte[] json = JsonSerializer.SerializeToUtf8Bytes<T>(bodyObject, jsonOptions.Value);
var byteCount = json.Length;
response.StatusCode = statusCode;
response.Headers.ContentType = "application/json; charset=utf-8";
response.Headers.ContentLength = byteCount;
if (beforeWriteBody is not null)
{
await beforeWriteBody(response);
}
await response.Body.WriteAsync(json, cancellationToken);
}
public static async Task WriteMessageAsync(this HttpResponse response, string message, int statusCode = 200, HttpResponseAction? beforeWriteBody = null, CancellationToken cancellationToken = default)
{
await response.WriteJsonAsync(new ErrorBody(message), statusCode: statusCode, beforeWriteBody, cancellationToken);
}
}
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