Weldbot (#1703)

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# Description

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The Weldbot is a medibot for IPC's, Borgs and other Silicon bots. It'll
behave pretty much as a medibot would, except it welds.
Upon destruction, it will spill fuel on the ground. Nasty stuff.

---


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<details><summary><h1>Media</h1></summary>
<p>

Note: The weldbot was slow in this video, and healed only 5 units of
damage. It will heal 50 now, but I don't have an up-to-date video.

https://github.com/user-attachments/assets/11c2343b-3e7e-4536-8238-4ee28d51c045

</p>
</details>

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# Changelog

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:cl: Timfa
- add: Added weldbot! It'll fix IPC's, Borgs and other robots. If they
stay still for long enough...

---------

Signed-off-by: Timfa <timfalken@hotmail.com>
Co-authored-by: Remuchi <72476615+Remuchi@users.noreply.github.com>
Co-authored-by: stellar-novas <stellar_novas@riseup.net>

Content.Server/NPC/HTN/PrimitiveTasks/Operators/Specific/PickNearbyWeldableOperator.cs

@@ -0,0 +1,83 @@
+using System.Threading;
+using System.Threading.Tasks;
+using Content.Server.NPC.Pathfinding;
+using Content.Shared.Damage;
+using Content.Shared.Emag.Components;
+using Content.Shared.Interaction;
+using Content.Shared.Silicons.Bots;
+using Content.Shared.Tag;
+using Robust.Shared.Prototypes;
+
+namespace Content.Server.NPC.HTN.PrimitiveTasks.Operators.Specific;
+
+public sealed partial class PickNearbyWeldableOperator : HTNOperator
+{
+    [Dependency] private readonly IEntityManager _entManager = default!;
+    [Dependency] private readonly IPrototypeManager _prototypeManager = default!;
+    private EntityLookupSystem _lookup = default!;
+    private WeldbotSystem _weldbot = default!;
+    private PathfindingSystem _pathfinding = default!;
+    private TagSystem _tagSystem = default!;
+
+    [DataField] public string RangeKey = NPCBlackboard.WeldbotWeldRange;
+
+    /// <summary>
+    /// Target entity to weld
+    /// </summary>
+    [DataField(required: true)]
+    public string TargetKey = string.Empty;
+
+    /// <summary>
+    /// Target entitycoordinates to move to.
+    /// </summary>
+    [DataField(required: true)]
+    public string TargetMoveKey = string.Empty;
+
+    public override void Initialize(IEntitySystemManager sysManager)
+    {
+        base.Initialize(sysManager);
+        _lookup = sysManager.GetEntitySystem<EntityLookupSystem>();
+        _weldbot = sysManager.GetEntitySystem<WeldbotSystem>();
+        _pathfinding = sysManager.GetEntitySystem<PathfindingSystem>();
+        _tagSystem = sysManager.GetEntitySystem<TagSystem>();
+    }
+
+    public override async Task<(bool Valid, Dictionary<string, object>? Effects)> Plan(NPCBlackboard blackboard,
+        CancellationToken cancelToken)
+    {
+        var owner = blackboard.GetValue<EntityUid>(NPCBlackboard.Owner);
+
+        if (!blackboard.TryGetValue<float>(RangeKey, out var range, _entManager) || !_entManager.TryGetComponent<WeldbotComponent>(owner, out var weldbot))
+            return (false, null);
+
+        var damageQuery = _entManager.GetEntityQuery<DamageableComponent>();
+        var emagged = _entManager.HasComponent<EmaggedComponent>(owner);
+
+        foreach (var target in _lookup.GetEntitiesInRange(owner, range))
+        {
+            if (!damageQuery.TryGetComponent(target, out var damage))
+                continue;
+
+            var tagPrototype = _prototypeManager.Index<TagPrototype>(WeldbotWeldOperator.SiliconTag);
+
+            if (!_entManager.TryGetComponent<TagComponent>(target, out var tagComponent) || !_tagSystem.HasTag(tagComponent, tagPrototype) || !emagged && damage.DamagePerGroup["Brute"].Value == 0)
+                continue;
+
+            //Needed to make sure it doesn't sometimes stop right outside it's interaction range
+            var pathRange = SharedInteractionSystem.InteractionRange - 1f;
+            var path = await _pathfinding.GetPath(owner, target, pathRange, cancelToken);
+
+            if (path.Result == PathResult.NoPath)
+                continue;
+
+            return (true, new Dictionary<string, object>()
+            {
+                {TargetKey, target},
+                {TargetMoveKey, _entManager.GetComponent<TransformComponent>(target).Coordinates},
+                {NPCBlackboard.PathfindKey, path},
+            });
+        }
+
+        return (false, null);
+    }
+}

Content.Server/NPC/HTN/PrimitiveTasks/Operators/Specific/WeldbotWeldOperator.cs

@@ -0,0 +1,91 @@
+using Content.Server.Chat.Systems;
+using Content.Shared.Chat;
+using Content.Shared.Damage;
+using Content.Shared.Damage.Prototypes;
+using Content.Shared.Emag.Components;
+using Content.Shared.Interaction;
+using Content.Shared.Popups;
+using Content.Shared.Silicons.Bots;
+using Content.Shared.Tag;
+using Robust.Shared.Audio.Systems;
+using Robust.Shared.Prototypes;
+
+namespace Content.Server.NPC.HTN.PrimitiveTasks.Operators.Specific;
+
+public sealed partial class WeldbotWeldOperator : HTNOperator
+{
+    [Dependency] private readonly IEntityManager _entMan = default!;
+    [Dependency] private readonly IPrototypeManager _prototypeManager = default!;
+    private ChatSystem _chat = default!;
+    private WeldbotSystem _weldbot = default!;
+    private SharedAudioSystem _audio = default!;
+    private SharedInteractionSystem _interaction = default!;
+    private SharedPopupSystem _popup = default!;
+    private DamageableSystem _damageableSystem = default!;
+    private TagSystem _tagSystem = default!;
+
+    public const string SiliconTag = "SiliconMob";
+
+    /// <summary>
+    /// Target entity to inject.
+    /// </summary>
+    [DataField(required: true)]
+    public string TargetKey = string.Empty;
+
+    public override void Initialize(IEntitySystemManager sysManager)
+    {
+        base.Initialize(sysManager);
+        _chat = sysManager.GetEntitySystem<ChatSystem>();
+        _weldbot = sysManager.GetEntitySystem<WeldbotSystem>();
+        _audio = sysManager.GetEntitySystem<SharedAudioSystem>();
+        _interaction = sysManager.GetEntitySystem<SharedInteractionSystem>();
+        _popup = sysManager.GetEntitySystem<SharedPopupSystem>();
+        _damageableSystem = sysManager.GetEntitySystem<DamageableSystem>();
+        _tagSystem = sysManager.GetEntitySystem<TagSystem>();
+    }
+
+    public override void TaskShutdown(NPCBlackboard blackboard, HTNOperatorStatus status)
+    {
+        base.TaskShutdown(blackboard, status);
+        blackboard.Remove<EntityUid>(TargetKey);
+    }
+
+    public override HTNOperatorStatus Update(NPCBlackboard blackboard, float frameTime)
+    {
+        var owner = blackboard.GetValue<EntityUid>(NPCBlackboard.Owner);
+
+        if (!blackboard.TryGetValue<EntityUid>(TargetKey, out var target, _entMan) || _entMan.Deleted(target))
+            return HTNOperatorStatus.Failed;
+
+        var tagPrototype = _prototypeManager.Index<TagPrototype>(SiliconTag);
+
+        if (!_entMan.TryGetComponent<TagComponent>(target, out var tagComponent) || !_tagSystem.HasTag(tagComponent, tagPrototype)
+            || !_entMan.TryGetComponent<WeldbotComponent>(owner, out var botComp)
+            || !_entMan.TryGetComponent<DamageableComponent>(target, out var damage)
+            || !_interaction.InRangeUnobstructed(owner, target)
+            || (damage.DamagePerGroup["Brute"].Value == 0 && !_entMan.HasComponent<EmaggedComponent>(owner)))
+            return HTNOperatorStatus.Failed;
+
+        if (botComp.IsEmagged)
+        {
+            if (!_prototypeManager.TryIndex<DamageGroupPrototype>("Burn", out var prototype))
+                return HTNOperatorStatus.Failed;
+
+            _damageableSystem.TryChangeDamage(target, new DamageSpecifier(prototype, 10), true, false, damage);
+        }
+        else
+        {
+            if (!_prototypeManager.TryIndex<DamageGroupPrototype>("Brute", out var prototype))
+                return HTNOperatorStatus.Failed;
+
+            _damageableSystem.TryChangeDamage(target, new DamageSpecifier(prototype, -50), true, false, damage);
+        }
+
+        _audio.PlayPvs(botComp.WeldSound, target);
+
+        if(damage.DamagePerGroup["Brute"].Value == 0) //only say "all done if we're actually done!"
+            _chat.TrySendInGameICMessage(owner, Loc.GetString("weldbot-finish-weld"), InGameICChatType.Speak, hideChat: true, hideLog: true);
+
+        return HTNOperatorStatus.Finished;
+    }
+}

Content.Server/NPC/NPCBlackboard.cs

@@ -26,6 +26,7 @@ public sealed partial class NPCBlackboard : IEnumerable<KeyValuePair<string, obj
         {"InteractRange", SharedInteractionSystem.InteractionRange},
         {"MaximumIdleTime", 7f},
         {MedibotInjectRange, 4f},
+        {WeldbotWeldRange, 4f},
         {MeleeMissChance, 0.3f},
         {"MeleeRange", 1f},
         {"MinimumIdleTime", 2f},
@@ -292,6 +293,7 @@ public string GetVisionRadiusKey(IEntityManager entMan)
     public const string FollowTarget = "FollowTarget";
     public const string Inventory = "Inventory";
     public const string MedibotInjectRange = "MedibotInjectRange";
+    public const string WeldbotWeldRange = "WeldbotWeldRange";
 
     public const string MeleeMissChance = "MeleeMissChance";
 

Content.Shared/Silicons/Bots/WeldbotComponent.cs

@@ -0,0 +1,26 @@
+using Robust.Shared.Audio;
+
+namespace Content.Shared.Silicons.Bots;
+
+/// <summary>
+/// Used by the server for NPC Weldbot welding.
+/// Currently no clientside prediction done, only exists in shared for emag handling.
+/// </summary>
+[RegisterComponent]
+[Access(typeof(WeldbotSystem))]
+public sealed partial class WeldbotComponent : Component
+{
+    /// <summary>
+    /// Sound played after welding a patient.
+    /// </summary>
+    [DataField]
+    public SoundSpecifier WeldSound = new SoundPathSpecifier("/Audio/Items/welder2.ogg");
+
+        [DataField]
+        public SoundSpecifier EmagSparkSound = new SoundCollectionSpecifier("sparks")
+        {
+            Params = AudioParams.Default.WithVolume(8f)
+        };
+
+    public bool IsEmagged = false;
+}

Content.Shared/Silicons/Bots/WeldbotSystem.cs

@@ -0,0 +1,27 @@
+using Content.Shared.Emag.Systems;
+using Robust.Shared.Audio.Systems;
+
+namespace Content.Shared.Silicons.Bots;
+
+/// <summary>
+/// Handles emagging Weldbots
+/// </summary>
+public sealed class WeldbotSystem : EntitySystem
+{
+    [Dependency] private readonly SharedAudioSystem _audio = default!;
+
+    public override void Initialize()
+    {
+        base.Initialize();
+
+        SubscribeLocalEvent<WeldbotComponent, GotEmaggedEvent>(OnEmagged);
+    }
+
+    private void OnEmagged(EntityUid uid, WeldbotComponent comp, ref GotEmaggedEvent args)
+    {
+        _audio.PlayPredicted(comp.EmagSparkSound, uid, args.UserUid);
+
+        comp.IsEmagged = true;
+        args.Handled = true;
+    }
+}

Resources/Locale/en-US/interaction/interaction-popup-component.ftl

@@ -61,6 +61,7 @@ petting-success-honkbot = You pet {THE($target)} on {POSS-ADJ($target)} slippery
 petting-success-mimebot = You pet {THE($target)} on {POSS-ADJ($target)} cold metal head.
 petting-success-cleanbot = You pet {THE($target)} on {POSS-ADJ($target)} damp metal head.
 petting-success-medibot = You pet {THE($target)} on {POSS-ADJ($target)} sterile metal head.
+petting-success-weldbot = You pet {THE($target)} on {POSS-ADJ($target)} stained metal head.
 petting-success-firebot = You pet {THE($target)} on {POSS-ADJ($target)} warm metal head.
 petting-success-generic-cyborg = You pet {THE($target)} on {POSS-ADJ($target)} metal head.
 petting-success-salvage-cyborg = You pet {THE($target)} on {POSS-ADJ($target)} dirty metal head.
@@ -80,6 +81,7 @@ petting-failure-honkbot = You reach out to pet {THE($target)}, but {SUBJECT($tar
 petting-failure-cleanbot = You reach out to pet {THE($target)}, but {SUBJECT($target)} {CONJUGATE-BE($target)} busy mopping!
 petting-failure-mimebot = You reach out to pet {THE($target)}, but {SUBJECT($target)} {CONJUGATE-BE($target)} busy miming!
 petting-failure-medibot = You reach out to pet {THE($target)}, but {POSS-ADJ($target)} syringe nearly stabs your hand!
+petting-failure-weldbot = You reach out to pet {THE($target)}, but {POSS-ADJ($target)} welder nearly burns your hand!
 petting-failure-firebot = You reach out to pet {THE($target)}, but {SUBJECT($target)} sprays you in the face before you can get close!
 petting-failure-generic-cyborg = You reach out to pet {THE($target)}, but {SUBJECT($target)} {CONJUGATE-BE($target)} busy stating laws!
 petting-failure-salvage-cyborg = You reach out to pet {THE($target)}, but {SUBJECT($target)} {CONJUGATE-BE($target)} busy drilling!

Resources/Locale/en-US/npc/weldbot.ftl

@@ -0,0 +1,2 @@
+weldbot-start-weld = Hold still, please.
+weldbot-finish-weld = All done.

Resources/Prototypes/Entities/Mobs/Cyborgs/base_borg_chassis.yml

@@ -223,6 +223,7 @@
     - FootstepSound
     - CanPilot
     - SiliconEmotes
+    - SiliconMob
   - type: Emoting
   - type: GuideHelp
     guides:

Resources/Prototypes/Entities/Mobs/NPCs/silicon.yml

@@ -66,6 +66,7 @@
   - type: Tag
     tags:
     - DoorBumpOpener
+    - SiliconMob
   - type: MobState
     allowedStates:
       - Alive

Resources/Prototypes/Entities/Mobs/NPCs/weldbot.yml

@@ -0,0 +1,54 @@
+- type: entity
+  parent: MobSiliconBase
+  id: MobWeldbot
+  name: weldbot
+  description: No substitute for an engineer, but better than nothing.
+  components:
+  - type: Weldbot
+  - type: Sprite
+    sprite: Mobs/Silicon/Bots/weldbot.rsi
+    state: weldbot
+  - type: HTN
+    rootTask:
+      task: WeldbotCompound
+  - type: Construction
+    graph: WeldBot
+    node: bot
+  - type: NoSlip
+  - type: Destructible
+    thresholds:
+    - trigger:
+        !type:DamageTrigger
+        damage: 110
+      behaviors:
+      - !type:TriggerBehavior
+    - trigger:
+        !type:DamageTrigger
+        damage: 120
+      behaviors:
+      - !type:SpillBehavior
+        solution: tank
+      - !type:DoActsBehavior
+        acts: [ "Destruction" ]
+  - type: SolutionContainerManager
+    solutions:
+      tank:
+        reagents:
+        - ReagentId: WeldingFuel
+          Quantity: 100
+  - type: SentienceTarget
+    flavorKind: station-event-random-sentience-flavor-mechanical
+  - type: Anchorable
+  - type: InteractionPopup
+    interactSuccessString: petting-success-weldbot
+    interactFailureString: petting-failure-weldbot
+    interactSuccessSound:
+      path: /Audio/Ambience/Objects/periodic_beep.ogg
+  - type: ShowHealthBars
+    damageContainers:
+    - Inorganic
+    - Silicon
+  - type: ShowHealthIcons
+    damageContainers:
+    - Inorganic
+    - Silicon

Resources/Prototypes/Entities/Mobs/Player/ipc.yml

@@ -130,6 +130,7 @@
     - FootstepSound
     - DoorBumpOpener
     - SiliconEmotes
+    - SiliconMob
 
 - type: entity
   save: false

Resources/Prototypes/Entities/Objects/Tools/welders.yml

@@ -19,6 +19,9 @@
       visible: false
       shader: unshaded
       map: ["enum.ToggleVisuals.Layer"]
+  - type: Tag
+    tags:
+    - WeldingTool
   - type: GenericVisualizer
     visuals:
       enum.ToggleVisuals.Toggled:

Resources/Prototypes/NPCs/weldbot.yml

@@ -0,0 +1,43 @@
+- type: htnCompound
+  id: WeldbotCompound
+  branches:
+    - tasks:
+        - !type:HTNCompoundTask
+          task: WeldNearbyCompound
+    - tasks:
+        - !type:HTNCompoundTask
+          task: IdleCompound
+
+- type: htnCompound
+  id: WeldNearbyCompound
+  branches:
+    - tasks:
+        - !type:HTNPrimitiveTask
+          operator: !type:PickNearbyWeldableOperator
+            targetKey: WeldTarget
+            targetMoveKey: TargetCoordinates
+
+        - !type:HTNPrimitiveTask
+          operator: !type:SpeakOperator
+            speech: weldbot-start-weld
+            hidden: true
+
+        - !type:HTNPrimitiveTask
+          operator: !type:MoveToOperator
+            pathfindInPlanning: false
+
+        - !type:HTNPrimitiveTask
+          operator: !type:SetFloatOperator
+            targetKey: IdleTime
+            amount: 3
+
+        - !type:HTNPrimitiveTask
+          operator: !type:WaitOperator
+            key: IdleTime
+          preconditions:
+            - !type:KeyExistsPrecondition
+              key: IdleTime
+
+        - !type:HTNPrimitiveTask
+          operator: !type:WeldbotWeldOperator
+            targetKey: WeldTarget