Christmas trees now grant gifts. (#13118)

* Christmas trees now grant gifts.

* docs

* add holiday requirements, fix sound.

* doc

* remove redundant stuff

* rename GiftPackin to RandomGift.

* a word

* Update Content.Server/Holiday/Christmas/LimitedItemGiverSystem.cs

Co-authored-by: Leon Friedrich <60421075+ElectroJr@users.noreply.github.com>

Co-authored-by: moonheart08 <moonheart08@users.noreply.github.com>
Co-authored-by: Leon Friedrich <60421075+ElectroJr@users.noreply.github.com>

Content.Server/Holiday/Christmas/LimitedItemGiverComponent.cs

@@ -0,0 +1,41 @@
+using Content.Shared.Storage;
+using Robust.Shared.Network;
+using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom.Prototype;
+
+namespace Content.Server.Holiday.Christmas;
+
+/// <summary>
+/// This is used for granting items to lucky souls, exactly once.
+/// </summary>
+[RegisterComponent, Access(typeof(LimitedItemGiverSystem))]
+public sealed class LimitedItemGiverComponent : Component
+{
+    /// <summary>
+    /// Santa knows who you are behind the screen, only one gift per player per round!
+    /// </summary>
+    public readonly HashSet<NetUserId> GrantedPlayers = new();
+
+    /// <summary>
+    /// Selects what entities can be given out by the giver.
+    /// </summary>
+    [DataField("spawnEntries", required: true)]
+    public List<EntitySpawnEntry> SpawnEntries = default!;
+
+    /// <summary>
+    /// The (localized) message shown upon receiving something.
+    /// </summary>
+    [DataField("receivedPopup", required: true)]
+    public string ReceivedPopup = default!;
+
+    /// <summary>
+    /// The (localized) message shown upon being denied.
+    /// </summary>
+    [DataField("deniedPopup", required: true)]
+    public string DeniedPopup = default!;
+
+    /// <summary>
+    /// The holiday required for this giver to work, if any.
+    /// </summary>
+    [DataField("requiredHoliday", customTypeSerializer: typeof(PrototypeIdSerializer<HolidayPrototype>)), ViewVariables(VVAccess.ReadWrite)]
+    public string? RequiredHoliday = null;
+}

Content.Server/Holiday/Christmas/LimitedItemGiverSystem.cs

@@ -0,0 +1,50 @@
+using Content.Server.Hands.Systems;
+using Content.Server.Mind.Components;
+using Content.Server.Popups;
+using Content.Shared.Interaction;
+using Content.Shared.Storage;
+using Robust.Server.GameObjects;
+
+namespace Content.Server.Holiday.Christmas;
+
+/// <summary>
+/// This handles handing out items from item givers.
+/// </summary>
+public sealed class LimitedItemGiverSystem : EntitySystem
+{
+    [Dependency] private readonly HandsSystem _hands = default!;
+    [Dependency] private readonly HolidaySystem _holiday = default!;
+    [Dependency] private readonly PopupSystem _popup = default!;
+    /// <inheritdoc/>
+    public override void Initialize()
+    {
+        SubscribeLocalEvent<LimitedItemGiverComponent, InteractHandEvent>(OnInteractHand);
+    }
+
+    private void OnInteractHand(EntityUid uid, LimitedItemGiverComponent component, InteractHandEvent args)
+    {
+        if (!TryComp<ActorComponent>(args.User, out var actor))
+            return;
+
+        if (component.GrantedPlayers.Contains(actor.PlayerSession.UserId) || (component.RequiredHoliday is not null && !_holiday.IsCurrentlyHoliday(component.RequiredHoliday)))
+        {
+            _popup.PopupEntity(Loc.GetString(component.DeniedPopup), uid, args.User);
+            return;
+        }
+
+        var toGive = EntitySpawnCollection.GetSpawns(component.SpawnEntries);
+        var coords = Transform(args.User).Coordinates;
+
+        foreach (var item in toGive)
+        {
+            if (item is null)
+                continue;
+
+            var spawned = Spawn(item, coords);
+            _hands.PickupOrDrop(args.User, spawned);
+        }
+
+        component.GrantedPlayers.Add(actor.PlayerSession.UserId);
+        _popup.PopupEntity(Loc.GetString(component.ReceivedPopup), uid, args.User);
+    }
+}

Content.Server/Holiday/Christmas/RandomGiftComponent.cs

@@ -0,0 +1,43 @@
+using Content.Shared.Whitelist;
+using Robust.Shared.Audio;
+using Robust.Shared.Prototypes;
+using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom.Prototype;
+
+namespace Content.Server.Holiday.Christmas;
+
+/// <summary>
+/// This is used for gifts with COMPLETELY random things.
+/// </summary>
+[RegisterComponent, Access(typeof(RandomGiftSystem))]
+public sealed class RandomGiftComponent : Component
+{
+    /// <summary>
+    /// The wrapper entity to spawn when unwrapping the gift.
+    /// </summary>
+    [DataField("wrapper", required: true, customTypeSerializer: typeof(PrototypeIdSerializer<EntityPrototype>))]
+    public string? Wrapper;
+
+    /// <summary>
+    ///     A sound to play when the items are spawned. For example, gift boxes being unwrapped.
+    /// </summary>
+    [DataField("sound", required: true)]
+    public SoundSpecifier? Sound;
+
+    /// <summary>
+    /// Whether or not the gift should be limited only to actual items.
+    /// </summary>
+    [DataField("insaneMode", required: true), ViewVariables(VVAccess.ReadWrite)]
+    public bool InsaneMode;
+
+    /// <summary>
+    /// What entities are allowed to examine this gift to see its contents.
+    /// </summary>
+    [DataField("contentsViewers", required: true)]
+    public EntityWhitelist ContentsViewers = default!;
+
+    /// <summary>
+    /// The currently selected entity to give out. Used so contents viewers can see inside.
+    /// </summary>
+    [DataField("selectedEntity"), ViewVariables(VVAccess.ReadWrite)]
+    public string? SelectedEntity;
+}

Content.Server/Holiday/Christmas/RandomGiftSystem.cs

@@ -0,0 +1,102 @@
+using Content.Server.Hands.Systems;
+using Content.Shared.Examine;
+using Content.Shared.Interaction.Events;
+using Content.Shared.Item;
+using Robust.Server.GameObjects;
+using Robust.Shared.Map.Components;
+using Robust.Shared.Physics.Components;
+using Robust.Shared.Prototypes;
+using Robust.Shared.Random;
+
+namespace Content.Server.Holiday.Christmas;
+
+/// <summary>
+/// This handles granting players their gift.
+/// </summary>
+public sealed class RandomGiftSystem : EntitySystem
+{
+    [Dependency] private readonly AudioSystem _audio = default!;
+    [Dependency] private readonly HandsSystem _hands = default!;
+    [Dependency] private readonly IComponentFactory _componentFactory = default!;
+    [Dependency] private readonly IPrototypeManager _prototype = default!;
+    [Dependency] private readonly IRobustRandom _random = default!;
+
+    private readonly List<string> _possibleGiftsSafe = new();
+    private readonly List<string> _possibleGiftsUnsafe = new();
+
+    /// <inheritdoc/>
+    public override void Initialize()
+    {
+        _prototype.PrototypesReloaded += OnPrototypesReloaded;
+        SubscribeLocalEvent<RandomGiftComponent, MapInitEvent>(OnGiftMapInit);
+        SubscribeLocalEvent<RandomGiftComponent, UseInHandEvent>(OnUseInHand);
+        SubscribeLocalEvent<RandomGiftComponent, ExaminedEvent>(OnExamined);
+        BuildIndex();
+    }
+
+    private void OnExamined(EntityUid uid, RandomGiftComponent component, ExaminedEvent args)
+    {
+        if (!component.ContentsViewers.IsValid(args.Examiner, EntityManager) || component.SelectedEntity is null)
+            return;
+
+        var name = _prototype.Index<EntityPrototype>(component.SelectedEntity).Name;
+        args.Message.PushNewline();
+        args.Message.AddText(Loc.GetString("gift-packin-contains", ("name", name)));
+    }
+
+    private void OnUseInHand(EntityUid uid, RandomGiftComponent component, UseInHandEvent args)
+    {
+        if (args.Handled)
+            return;
+
+        if (component.SelectedEntity is null)
+            return;
+
+        var coords = Transform(args.User).Coordinates;
+        var handsEnt = Spawn(component.SelectedEntity, coords);
+        EnsureComp<ItemComponent>(handsEnt); // For insane mode.
+        if (component.Wrapper is not null)
+            Spawn(component.Wrapper, coords);
+
+        args.Handled = true;
+        _audio.PlayPvs(component.Sound, args.User);
+        Del(uid);
+        _hands.PickupOrDrop(args.User, handsEnt);
+
+    }
+
+    private void OnGiftMapInit(EntityUid uid, RandomGiftComponent component, MapInitEvent args)
+    {
+        if (component.InsaneMode)
+            component.SelectedEntity = _random.Pick(_possibleGiftsUnsafe);
+        else
+            component.SelectedEntity = _random.Pick(_possibleGiftsSafe);
+    }
+
+    private void OnPrototypesReloaded(PrototypesReloadedEventArgs obj)
+    {
+        BuildIndex();
+    }
+
+    private void BuildIndex()
+    {
+        _possibleGiftsSafe.Clear();
+        _possibleGiftsUnsafe.Clear();
+        var itemCompName = _componentFactory.GetComponentName(typeof(ItemComponent));
+        var mapGridCompName = _componentFactory.GetComponentName(typeof(MapGridComponent));
+        var physicsCompName = _componentFactory.GetComponentName(typeof(PhysicsComponent));
+
+        foreach (var proto in _prototype.EnumeratePrototypes<EntityPrototype>())
+        {
+            if (proto.Abstract || proto.NoSpawn || proto.Components.ContainsKey(mapGridCompName) || !proto.Components.ContainsKey(physicsCompName))
+                continue;
+
+            _possibleGiftsUnsafe.Add(proto.ID);
+
+            if (!proto.Components.ContainsKey(itemCompName))
+                continue;
+
+            _possibleGiftsSafe.Add(proto.ID);
+        }
+    }
+}

Content.Server/Holiday/Christmas/SantaComponent.cs

@@ -0,0 +1,10 @@
+namespace Content.Server.Holiday.Christmas;
+
+/// <summary>
+/// This is used as a marker component, allows them to see gift contents.
+/// </summary>
+[RegisterComponent]
+public sealed class SantaComponent : Component
+{
+
+}

Resources/Locale/en-US/holiday/gifts.ftl

@@ -0,0 +1,3 @@
+gift-packin-contains = This present appears to contain {INDEFINITE($name)} {$name}.
+christmas-tree-got-gift = After a bit of digging, you find a present with your name on it!
+christmas-tree-no-gift = There isn't a gift under the tree for you...

Resources/Prototypes/Entities/Objects/Decoration/flora.yml

@@ -334,6 +334,7 @@
 - type: entity
   parent: BaseTreeConifer
   id: FloraTreeChristmas02
+  suffix: PresentsGiver
   name: christmas tree
   components:
   - type: Sprite
@@ -346,6 +347,19 @@
       density: 4500
       layer:
       - WallLayer
+  - type: LimitedItemGiver
+    spawnEntries:
+      - id: PresentRandom
+        orGroup: present
+      - id: PresentRandomUnsafe
+        prob: 0.5
+        orGroup: present
+      - id: PresentRandomInsane
+        prob: 0.2
+        orGroup: present
+    receivedPopup: christmas-tree-got-gift
+    deniedPopup: christmas-tree-no-gift
+    requiredHoliday: FestiveSeason
 
 - type: entity
   parent: BaseTreeConifer

Resources/Prototypes/Entities/Objects/Decoration/present.yml

@@ -1,32 +1,53 @@
 - type: entity
-  id: Present
-  parent: BaseStorageItem
+  id: PresentBase
   name: Present
-  suffix: Empty
   description: A little box with incredible surprises inside.
+  abstract: true
   components:
   - type: Sprite
     sprite: Objects/Decoration/present.rsi
     netsync: false
     layers:
       - state: present
+
+- type: entity
+  id: Present
+  parent: [PresentBase, BaseStorageItem]
+  suffix: Empty
+  components:
   - type: Item
     size: 30
   - type: Storage
     capacity: 30
 
 - type: entity
-  id: PresentRandom
-  parent: BaseItem
-  name: Present
-  suffix: Filled Random
-  description: A little box with incredible surprises inside.
+  id: PresentRandomUnsafe
+  parent: [PresentBase, BaseItem]
+  suffix: Filled Unsafe
+  components:
+  - type: RandomGift
+    wrapper: PresentTrash
+    sound:
+      path: /Audio/Effects/unwrap.ogg
+    insaneMode: false
+    contentsViewers:
+      components:
+      - Ghost
+      - Santa
+
+- type: entity
+  id: PresentRandomInsane
+  parent: PresentRandomUnsafe
+  suffix: Filled Insane
+  components:
+    - type: RandomGift
+      insaneMode: true
+
+- type: entity
+  id: PresentRandom
+  parent: [PresentBase, BaseItem]
+  suffix: Filled Safe
   components:
-  - type: Sprite
-    sprite: Objects/Decoration/present.rsi
-    netsync: false
-    layers:
-      - state: present
   - type: SpawnItemsOnUse
     items:
       - id: PresentTrash