101 lines
3.3 KiB
C#
101 lines
3.3 KiB
C#
using System.Threading;
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using System.Threading.Tasks;
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using Content.Server.NPC.Components;
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using Content.Shared.MobState;
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using Content.Shared.MobState.Components;
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namespace Content.Server.NPC.HTN.PrimitiveTasks.Operators.Melee;
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/// <summary>
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/// Attacks the specified key in melee combat.
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/// </summary>
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public sealed class MeleeOperator : HTNOperator
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{
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[Dependency] private readonly IEntityManager _entManager = default!;
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/// <summary>
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/// Key that contains the target entity.
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/// </summary>
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[DataField("targetKey", required: true)]
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public string TargetKey = default!;
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/// <summary>
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/// Minimum damage state that the target has to be in for us to consider attacking.
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/// </summary>
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[DataField("targetState")]
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public DamageState TargetState = DamageState.Alive;
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// Like movement we add a component and pass it off to the dedicated system.
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public override void Startup(NPCBlackboard blackboard)
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{
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base.Startup(blackboard);
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var melee = _entManager.EnsureComponent<NPCMeleeCombatComponent>(blackboard.GetValue<EntityUid>(NPCBlackboard.Owner));
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melee.Target = blackboard.GetValue<EntityUid>(TargetKey);
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}
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public override async Task<(bool Valid, Dictionary<string, object>? Effects)> Plan(NPCBlackboard blackboard,
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CancellationToken cancelToken)
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{
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// Don't attack if they're already as wounded as we want them.
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if (!blackboard.TryGetValue<EntityUid>(TargetKey, out var target))
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{
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return (false, null);
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}
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if (_entManager.TryGetComponent<MobStateComponent>(target, out var mobState) &&
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mobState.CurrentState != null &&
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mobState.CurrentState > TargetState)
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{
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return (false, null);
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}
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return (true, null);
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}
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public override void Shutdown(NPCBlackboard blackboard, HTNOperatorStatus status)
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{
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base.Shutdown(blackboard, status);
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_entManager.RemoveComponent<NPCMeleeCombatComponent>(blackboard.GetValue<EntityUid>(NPCBlackboard.Owner));
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blackboard.Remove<EntityUid>(TargetKey);
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}
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public override HTNOperatorStatus Update(NPCBlackboard blackboard, float frameTime)
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{
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base.Update(blackboard, frameTime);
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var owner = blackboard.GetValue<EntityUid>(NPCBlackboard.Owner);
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var status = HTNOperatorStatus.Continuing;
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if (_entManager.TryGetComponent<NPCMeleeCombatComponent>(owner, out var combat))
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{
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// Success
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if (_entManager.TryGetComponent<MobStateComponent>(combat.Target, out var mobState) &&
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mobState.CurrentState != null &&
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mobState.CurrentState > TargetState)
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{
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status = HTNOperatorStatus.Finished;
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}
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else
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{
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switch (combat.Status)
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{
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case CombatStatus.TargetOutOfRange:
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case CombatStatus.Normal:
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status = HTNOperatorStatus.Continuing;
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break;
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default:
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status = HTNOperatorStatus.Failed;
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break;
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}
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}
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}
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if (status != HTNOperatorStatus.Continuing)
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{
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_entManager.RemoveComponent<NPCMeleeCombatComponent>(owner);
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}
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return status;
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}
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}
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