asentrafin/backend/Services/Plaid/PlaidJson.cs

using System.Globalization;
using System.Text.Json;

namespace Asentrafin.Api.Services.Plaid;

internal static class PlaidJson
{
    public static JsonElement? Property(this JsonElement element, string name)
    {
        return element.ValueKind == JsonValueKind.Object && element.TryGetProperty(name, out var value)
            ? value
            : null;
    }

    public static string? String(this JsonElement element, string name)
    {
        var value = element.Property(name);
        return value is { ValueKind: JsonValueKind.String } ? value.Value.GetString() : null;
    }

    public static decimal? Decimal(this JsonElement element, string name)
    {
        var value = element.Property(name);
        return value is { ValueKind: JsonValueKind.Number } && value.Value.TryGetDecimal(out var parsed)
            ? parsed
            : null;
    }

    public static int? Int(this JsonElement element, string name)
    {
        var value = element.Property(name);
        return value is { ValueKind: JsonValueKind.Number } && value.Value.TryGetInt32(out var parsed)
            ? parsed
            : null;
    }

    public static bool Bool(this JsonElement element, string name)
    {
        var value = element.Property(name);
        return value is { ValueKind: JsonValueKind.True } ||
            value is { ValueKind: JsonValueKind.False } && value.Value.GetBoolean();
    }

    public static DateOnly? Date(this JsonElement element, string name)
    {
        var value = element.String(name);
        return DateOnly.TryParseExact(value, "yyyy-MM-dd", CultureInfo.InvariantCulture, DateTimeStyles.None, out var parsed)
            ? parsed
            : null;
    }

    public static DateTimeOffset? DateTimeOffset(this JsonElement element, string name)
    {
        var value = element.String(name);
        return System.DateTimeOffset.TryParse(value, CultureInfo.InvariantCulture, DateTimeStyles.AssumeUniversal, out var parsed)
            ? parsed
            : null;
    }

    public static string[] StringArray(this JsonElement element, string name)
    {
        var value = element.Property(name);
        if (value is not { ValueKind: JsonValueKind.Array })
        {
            return [];
        }

        return value.Value.EnumerateArray()
            .Where(item => item.ValueKind == JsonValueKind.String)
            .Select(item => item.GetString())
            .Where(item => !string.IsNullOrWhiteSpace(item))
            .Select(item => item!)
            .ToArray();
    }
}