ExtensionMethods.cs

using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using PrimeView.Entities;
using System;
using System.Text.Json;

namespace PrimeView.JsonFileReader
{
    public static class ExtensionMethods
    {
        private static readonly JsonSerializerOptions serializerOptions = new()
        {
            PropertyNameCaseInsensitive = true,
            AllowTrailingCommas = true
        };

        public static int GetStableHashCode(this string str)
        {
            unchecked
            {
                int hash1 = 5381;
                int hash2 = hash1;

                for (int i = 0; i < str.Length && str[i] != '\0'; i += 2)
                {
                    hash1 = ((hash1 << 5) + hash1) ^ str[i];
                    if (i == str.Length - 1 || str[i + 1] == '\0')
                    {
                        break;
                    }

                    hash2 = ((hash2 << 5) + hash2) ^ str[i + 1];
                }

                return hash1 + (hash2 * 1566083941);
            }
        }

        public static IServiceCollection AddJsonFileReportReader(this IServiceCollection serviceCollection, string baseAddress, IConfiguration configuration)
        {
            return serviceCollection.AddScoped<IReportReader>(sp => new ReportReader(baseAddress, configuration));
        }

        public static T? Get<T>(this JsonElement element)
        {
            try
            {
                return JsonSerializer.Deserialize<T>(element.GetRawText(), serializerOptions);
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex);
            }

            return default;
        }

        public static T? Get<T>(this JsonElement element, string propertyName) where T : class
        {
            return GetElement(element, propertyName)?.Get<T>();
        }

        public static T? Get<T>(this JsonElement? element, string propertyName) where T : class
        {
            return element.HasValue ? Get<T>(element.Value, propertyName) : null;
        }

        public static int? GetInt32(this JsonElement? element, string propertyName)
        {
            return element.HasValue ? GetInt32(element.Value, propertyName) : null;
        }

        public static int? GetInt32(this JsonElement element, string propertyName)
        {
            var childElement = GetElement(element, propertyName);

            return childElement.HasValue && childElement.Value.TryGetInt32(out int value) ? value : null;
        }

        public static long? GetInt64(this JsonElement? element, string propertyName)
        {
            return element.HasValue ? GetInt64(element.Value, propertyName) : null;
        }

        public static long? GetInt64(this JsonElement element, string propertyName)
        {
            var childElement = GetElement(element, propertyName);

            return childElement.HasValue && childElement.Value.TryGetInt64(out long value) ? value : null;
        }

        public static double? GetDouble(this JsonElement? element, string propertyName)
        {
            return element.HasValue ? GetDouble(element.Value, propertyName) : null;
        }

        public static double? GetDouble(this JsonElement element, string propertyName)
        {
            var childElement = GetElement(element, propertyName);

            return childElement.HasValue && childElement.Value.TryGetDouble(out double value) ? value : null;
        }

        public static string? GetString(this JsonElement? element, string propertyName)
        {
            return element.HasValue ? GetString(element.Value, propertyName) : null;
        }

        public static string? GetString(this JsonElement element, string propertyName)
        {
            return GetElement(element, propertyName)?.GetString();
        }

        public static DateTime? GetDateFromUnixTimeSeconds(this JsonElement? element, string propertyName)
        {
            return element.HasValue ? GetDateFromUnixTimeSeconds(element.Value, propertyName) : null;
        }

        public static DateTime? GetDateFromUnixTimeSeconds(this JsonElement element, string propertyName)
        {
            int? seconds = GetInt32(element, propertyName);

            return seconds.HasValue ? DateTimeOffset.FromUnixTimeSeconds(seconds.Value).DateTime : null;
        }

        public static JsonElement? GetElement(this JsonElement element, string propertyName)
        {
            return element.TryGetProperty(propertyName, out var childElement) ? childElement : null;
        }

        public static JsonElement? GetElement(this JsonElement? element, string propertyName)
        {
            return element.HasValue ? GetElement(element.Value, propertyName) : null;
        }
    }
}