Delta-v/Content.Server/NPC/HTN/Preconditions/TargetInRangePrecondition.cs

using Robust.Shared.Map;

namespace Content.Server.NPC.HTN.Preconditions;

/// <summary>
/// Is the specified key within the specified range of us.
/// </summary>
public sealed partial class TargetInRangePrecondition : HTNPrecondition
{
    [Dependency] private readonly IEntityManager _entManager = default!;
    private SharedTransformSystem _transformSystem = default!;

    [DataField("targetKey", required: true)] public string TargetKey = default!;

    [DataField("rangeKey", required: true)]
    public string RangeKey = default!;
    public override void Initialize(IEntitySystemManager sysManager)
    {
        base.Initialize(sysManager);
        _transformSystem = sysManager.GetEntitySystem<SharedTransformSystem>();
    }

    [DataField]
    public bool Invert;

    public override bool IsMet(NPCBlackboard blackboard)
    {
        if (!blackboard.TryGetValue<EntityCoordinates>(NPCBlackboard.OwnerCoordinates, out var coordinates, _entManager))
            return false;

        if (!blackboard.TryGetValue<EntityUid>(TargetKey, out var target, _entManager) ||
            !_entManager.TryGetComponent<TransformComponent>(target, out var targetXform))
            return false;

        return _transformSystem.InRange(coordinates, targetXform.Coordinates, blackboard.GetValueOrDefault<float>(RangeKey, _entManager)) ^ Invert;
    }
}