SPT-Server-Build/Libraries/SPTarkov.Server.Core/Extensions/TemplateItemExtensions.cs

using SPTarkov.Server.Core.Models.Common;
using SPTarkov.Server.Core.Models.Eft.Common.Tables;

namespace SPTarkov.Server.Core.Extensions;

public static class TemplateItemExtensions
{
    public static IEnumerable<TemplateItem> OfClass(this Dictionary<MongoId, TemplateItem> templates, params MongoId[] baseClasses)
    {
        return templates.Where(x => baseClasses.Contains(x.Value.Parent)).Select(x => x.Value);
    }

    public static IEnumerable<TemplateItem> OfClass(
        this Dictionary<MongoId, TemplateItem> templates,
        Func<TemplateItem, bool> pred,
        params MongoId[] baseClasses
    )
    {
        return templates.Where(x => baseClasses.Contains(x.Value.Parent) && pred(x.Value)).Select(x => x.Value);
    }

    /// <summary>
    ///     Check if item is quest item
    /// </summary>
    /// <param name="templateItem">Item to check quest status of</param>
    /// <returns>true if item is flagged as quest item</returns>
    public static bool IsQuestItem(this TemplateItem templateItem)
    {
        if (templateItem.Properties.QuestItem.GetValueOrDefault(false))
        {
            return true;
        }

        return false;
    }

    /// <summary>
    ///     Get a weapons default magazine template id
    /// </summary>
    /// <param name="weaponTemplate">Weapon to get default magazine for</param>
    /// <returns>Tpl of magazine</returns>
    public static MongoId? GetWeaponsDefaultMagazineTpl(this TemplateItem weaponTemplate)
    {
        return weaponTemplate.Properties.DefMagType;
    }

    /// <summary>
    ///     Get the default plate an armor has in its db item
    /// </summary>
    /// <param name="armorItem">Item to look up default plate</param>
    /// <param name="modSlot">front/back</param>
    /// <returns>Tpl of plate</returns>
    public static MongoId? GetDefaultPlateTpl(this TemplateItem armorItem, string modSlot)
    {
        var relatedItemDbModSlot = armorItem.Properties.Slots?.FirstOrDefault(slot =>
            string.Equals(slot.Name, modSlot, StringComparison.OrdinalIgnoreCase)
        );

        return relatedItemDbModSlot?.Props?.Filters?.FirstOrDefault()?.Plate;
    }

    /// <summary>
    ///     Does the passed in <see cref="TemplateItem"/> lack slots, cartridges or chambers
    /// </summary>
    /// <param name="item">Item to check</param>
    /// <returns>True if it lacks cartridges/chamber slots, False if not</returns>
    public static bool HasNoSlotsCartridgesOrChambers(this TemplateItem item)
    {
        if (item.Properties is null)
        {
            return true;
        }

        return item.Properties.Slots is null
            || !item.Properties.Slots.Any()
                && (item.Properties.Cartridges is null || !item.Properties.Cartridges.Any())
                && (item.Properties.Chambers is null || !item.Properties.Chambers.Any());
    }
}