Seed data to database with Bogus.

SeedData.cs

using MegaDeskRazorPages.Data;
using Microsoft.EntityFrameworkCore;
using MegaDeskRazorPages.Models;
using MegaDeskRazorPages.Utilities;
using Bogus;

namespace MyScriptureJournal.Models;

public static class SeedData
{
    public static Random Random = new Random();
    public static Array DesktopMaterialValues = Enum.GetValues(typeof(DesktopMaterial));
    public static int[] DeliveryDays = new[] { 3, 5, 7, 14 };
    public static Faker faker = new Faker();
    public static List<List<int>> shippingPrices = new()
    {
        new() { 60, 70, 80 },
        new() { 40, 50, 60 },
        new() { 30, 35, 40 }
    };

    public static void Initialize(IServiceProvider serviceProvider)
    {
        using (var context = new MegaDeskRazorPagesContext(
            serviceProvider.GetRequiredService<
                DbContextOptions<MegaDeskRazorPagesContext>>()))
        {
            if (context == null || context.DeskQuote == null)
            {
                throw new ArgumentNullException("Null MegaDeskRazorPagesContext");
            }

            // Look for any desk quotes.
            if (context.DeskQuote.Any())
            {
                return;   // DB has been already seeded
            }

            DeskQuote[] deskQuotes = GetDeskQuotesArray(quantity: 531, context: context);

            context.DeskQuote.AddRange(deskQuotes);
            context.SaveChanges();
        }
    }

    private static DeskQuote[] GetDeskQuotesArray(int quantity, MegaDeskRazorPagesContext context)
    {
        DeskQuote[] arr = new DeskQuote[quantity];

        for (int i = 0; i < arr.Length; i++)
        {
            Desk desk = GetSeededDesk(context);

            int newDaysUntilDelivery = GetRandomDeliveryDay();
            string newFullName = faker.Name.FullName();
            DateTime newDate = GetRandomDay();

            DeskQuote deskQuote = new DeskQuote
            {
                DeskId = desk.Id,
                DaysUntilDelivery = newDaysUntilDelivery,
                CustomerName = newFullName,
                Date = newDate,
                TotalCost = Calculator.CalculateTotalCost(desk, newDaysUntilDelivery)
            };

            arr[i] = deskQuote;
        }

        return arr;
    }

    private static int GetRandomDeliveryDay()
    {
        int index = Random.Next(0, DeliveryDays.Length);
        return DeliveryDays[index];
    }

    private static DateTime GetRandomDay()
    {
        DateTime start = new DateTime(1995, 1, 1);
        int range = (DateTime.Today - start).Days;
        return start.AddDays(Random.Next(range));
    }

    private static Desk GetSeededDesk(MegaDeskRazorPagesContext context)
    {
        Array desktopMaterialValues = Enum.GetValues(typeof(DesktopMaterial));

        var desk = new Desk
        {
            Width = Random.Next(24, 96),
            Depth = Random.Next(12, 48),
            NumDrawers = Random.Next(0, 7),
            Material = (DesktopMaterial)desktopMaterialValues
                           .GetValue(Random
                           .Next(desktopMaterialValues.Length))
        };

        context.Desks.Add(desk);
        context.SaveChanges();
        return desk;
    }    
}