tbd-station-14/Content.Server/PDA/PDAUplinkManager.cs

using System.Collections.Generic;
using System.Linq;
using Content.Server.GameObjects;
using Content.Server.GameObjects.Components;
using Content.Server.GameObjects.Components.GUI;
using Content.Server.GameObjects.Components.Mobs;
using Content.Server.Interfaces.PDA;
using Content.Shared.GameObjects.Components.PDA;
using Content.Shared.Prototypes.PDA;
using Robust.Shared.Interfaces.GameObjects;
using Robust.Shared.IoC;
using Robust.Shared.Prototypes;

namespace Content.Server.PDA
{
    public class PDAUplinkManager : IPDAUplinkManager
    {
#pragma warning disable 649
        [Dependency] private readonly IPrototypeManager _prototypeManager;
        [Dependency] private readonly IEntityManager _entityManager;
#pragma warning restore 649

        private List<UplinkAccount> _accounts;
        private List<UplinkListingData> _listings;

        public IReadOnlyList<UplinkListingData> FetchListings => _listings;

        public void Initialize()
        {
            _listings = new List<UplinkListingData>();
            foreach (var item in _prototypeManager.EnumeratePrototypes<UplinkStoreListingPrototype>())
            {
                var newListing = new UplinkListingData(item.ListingName, item.ItemId, item.Price, item.Category,
                    item.Description);

                RegisterUplinkListing(newListing);
            }

            _accounts = new List<UplinkAccount>();
        }

        private void RegisterUplinkListing(UplinkListingData listing)
        {
            if (!ContainsListing(listing))
            {
                _listings.Add(listing);
            }

        }

        private bool ContainsListing(UplinkListingData listing)
        {
            return _listings.Any(otherListing => listing.Equals(otherListing));
        }

        public bool AddNewAccount(UplinkAccount acc)
        {
            var entity = _entityManager.GetEntity(acc.AccountHolder);
            if (entity.TryGetComponent(out MindComponent mindComponent))
            {
                if (mindComponent.Mind.AllRoles.Any(role => !role.Antagonist))
                {
                    return false;
                }
            }
            if (_accounts.Contains(acc))
            {
                return false;
            }

            _accounts.Add(acc);
            return true;
        }

        public bool ChangeBalance(UplinkAccount acc, int amt)
        {
            var account = _accounts.Find(uplinkAccount => uplinkAccount.AccountHolder == acc.AccountHolder);
            if (account != null && account.Balance + amt < 0)
            {
                return false;
            }
            account.ModifyAccountBalance(account.Balance + amt);
            return true;
        }

        public bool TryPurchaseItem(UplinkAccount acc, UplinkListingData listing)
        {
            if (acc == null || listing == null)
            {
                return false;
            }
            if (!ContainsListing(listing) || acc.Balance < listing.Price)
            {
                return false;
            }

            if (!ChangeBalance(acc, -listing.Price))
            {
                return false;
            }
            var player = _entityManager.GetEntity(acc.AccountHolder);
            var hands = player.GetComponent<HandsComponent>();
            hands.PutInHandOrDrop(_entityManager.SpawnEntity(listing.ItemId,
                player.Transform.GridPosition).GetComponent<ItemComponent>());
            return true;

        }


    }
}