space-station-14/Content.Server/Administration/Commands/AddReagent.cs

using Content.Shared.Chemistry.EntitySystems;
using Content.Shared.Administration;
using Content.Shared.Chemistry.Components.SolutionManager;
using Content.Shared.Chemistry.Reagent;
using Content.Shared.FixedPoint;
using Robust.Shared.Console;
using Robust.Shared.Prototypes;
using System.Linq;

namespace Content.Server.Administration.Commands
{
    /// <summary>
    ///     Command that allows you to edit an existing solution by adding (or removing) reagents.
    /// </summary>
    [AdminCommand(AdminFlags.Admin)]
    public sealed class AddReagent : IConsoleCommand
    {
        [Dependency] private readonly IEntityManager _entManager = default!;
        [Dependency] private readonly IPrototypeManager _protomanager = default!;

        public string Command => "addreagent";
        public string Description => "Add (or remove) some amount of reagent from some solution.";
        public string Help => $"Usage: {Command} <target> <solution> <reagent> <quantity>";

        public void Execute(IConsoleShell shell, string argStr, string[] args)
        {
            if (args.Length < 4)
            {
                shell.WriteLine($"Not enough arguments.\n{Help}");
                return;
            }

            if (!NetEntity.TryParse(args[0], out var uidNet) || !_entManager.TryGetEntity(uidNet, out var uid))
            {
                shell.WriteLine($"Invalid entity id.");
                return;
            }

            var solutionContainerSystem = _entManager.System<SharedSolutionContainerSystem>();
            if (!solutionContainerSystem.TryGetSolution(uid.Value, args[1], out var solution))
            {
                var solutions = solutionContainerSystem.EnumerateSolutions(uid.Value).ToArray();
                if (!solutions.Any())
                {
                    shell.WriteLine("Entity does not have any solutions!");
                    return;
                }

                var validSolutions = string.Join(", ", solutions.Select(s => s.Name));
                shell.WriteLine($"Entity does not have a \"{args[1]}\" solution. Valid solutions are:\n{validSolutions}");
                return;
            }

            if (!_protomanager.HasIndex<ReagentPrototype>(args[2]))
            {
                shell.WriteLine($"Unknown reagent prototype");
                return;
            }

            if (!float.TryParse(args[3], out var quantityFloat))
            {
                shell.WriteLine($"Failed to parse quantity");
                return;
            }
            var quantity = FixedPoint2.New(MathF.Abs(quantityFloat));

            if (quantityFloat > 0)
                solutionContainerSystem.TryAddReagent(solution.Value, args[2], quantity, out _);
            else
                solutionContainerSystem.RemoveReagent(solution.Value, args[2], quantity);
        }
    }
}