tbd-station-14/Content.Server/Construction/Completions/BuildMachine.cs

using System.Linq;
using System.Threading.Tasks;
using Content.Server.Construction.Components;
using Content.Shared.Construction;
using JetBrains.Annotations;
using Robust.Shared.Containers;
using Robust.Shared.GameObjects;
using Robust.Shared.Log;
using Robust.Shared.Serialization.Manager.Attributes;

namespace Content.Server.Construction.Completions
{
    [UsedImplicitly]
    [DataDefinition]
    public class BuildMachine : IGraphAction
    {
        public void PerformAction(EntityUid uid, EntityUid? userUid, IEntityManager entityManager)
        {
            if (!entityManager.TryGetComponent(uid, out ContainerManagerComponent? containerManager))
            {
                Logger.Warning($"Machine frame entity {uid} did not have a container manager! Aborting build machine action.");
                return;
            }

            if (!entityManager.TryGetComponent(uid, out MachineFrameComponent? machineFrame))
            {
                Logger.Warning($"Machine frame entity {uid} did not have a machine frame component! Aborting build machine action.");
                return;
            }

            if (!machineFrame.IsComplete)
            {
                Logger.Warning($"Machine frame entity {uid} doesn't have all required parts to be built! Aborting build machine action.");
                return;
            }

            if (!containerManager.TryGetContainer(MachineFrameComponent.BoardContainer, out var entBoardContainer))
            {
                Logger.Warning($"Machine frame entity {uid} did not have the '{MachineFrameComponent.BoardContainer}' container! Aborting build machine action.");
                return;
            }

            if (!containerManager.TryGetContainer(MachineFrameComponent.PartContainer, out var entPartContainer))
            {
                Logger.Warning($"Machine frame entity {uid} did not have the '{MachineFrameComponent.PartContainer}' container! Aborting build machine action.");
                return;
            }

            if (entBoardContainer.ContainedEntities.Count != 1)
            {
                Logger.Warning($"Machine frame entity {uid} did not have exactly one item in the '{MachineFrameComponent.BoardContainer}' container! Aborting build machine action.");
            }

            var board = entBoardContainer.ContainedEntities[0];

            if (!board.TryGetComponent(out MachineBoardComponent? boardComponent))
            {
                Logger.Warning($"Machine frame entity {uid} had an invalid entity in container \"{MachineFrameComponent.BoardContainer}\"! Aborting build machine action.");
                return;
            }

            entBoardContainer.Remove(board);

            var transform = entityManager.GetComponent<ITransformComponent>(uid);
            var machine = entityManager.SpawnEntity(boardComponent.Prototype, transform.Coordinates);
            machine.Transform.LocalRotation = transform.LocalRotation;

            var boardContainer = machine.EnsureContainer<Container>(MachineFrameComponent.BoardContainer, out var existed);

            if (existed)
            {
                // Clean that up...
                boardContainer.CleanContainer();
            }

            var partContainer = machine.EnsureContainer<Container>(MachineFrameComponent.PartContainer, out existed);

            if (existed)
            {
                // Clean that up, too...
                partContainer.CleanContainer();
            }

            boardContainer.Insert(board);

            // Now we insert all parts.
            foreach (var part in entPartContainer.ContainedEntities.ToArray())
            {
                entPartContainer.ForceRemove(part);
                partContainer.Insert(part);
            }

            var constructionSystem = entityManager.EntitySysManager.GetEntitySystem<ConstructionSystem>();
            if (machine.TryGetComponent(out ConstructionComponent? construction))
            {
                // We only add these two container. If some construction needs to take other containers into account, fix this.
                constructionSystem.AddContainer(machine.Uid, MachineFrameComponent.BoardContainer, construction);
                constructionSystem.AddContainer(machine.Uid, MachineFrameComponent.PartContainer, construction);
            }

            if (machine.TryGetComponent(out MachineComponent? machineComp))
            {
                machineComp.RefreshParts();
            }

            entityManager.DeleteEntity(uid);
        }
    }
}