InteractionPopupSystem.cs

using Content.Server.Interaction.Components;
using Content.Server.Popups;
using Content.Shared.Bed.Sleep;
using Content.Shared.IdentityManagement;
using Content.Shared.Interaction;
using Content.Shared.Mobs.Components;
using Content.Shared.Mobs.Systems;
using Content.Shared.Mood;
using Robust.Shared.Audio;
using Robust.Shared.Audio.Systems;
using Robust.Shared.Player;
using Robust.Shared.Random;
using Robust.Shared.Timing;

namespace Content.Server.Interaction;

public sealed class InteractionPopupSystem : EntitySystem
{
    [Dependency] private readonly IGameTiming _gameTiming = default!;
    [Dependency] private readonly IRobustRandom _random = default!;
    [Dependency] private readonly MobStateSystem _mobStateSystem = default!;
    [Dependency] private readonly PopupSystem _popupSystem = default!;
    [Dependency] private readonly SharedAudioSystem _audio = default!;
    [Dependency] private readonly SharedTransformSystem _transform = default!;

    public override void Initialize()
    {
        base.Initialize();
        SubscribeLocalEvent<InteractionPopupComponent, InteractHandEvent>(OnInteractHand);
        SubscribeLocalEvent<InteractionPopupComponent, ActivateInWorldEvent>(OnActivateInWorld);
    }

    private void OnActivateInWorld(EntityUid uid, InteractionPopupComponent component, ActivateInWorldEvent args)
    {
        if (!component.OnActivate)
            return;

        SharedInteract(uid, component, args, args.Target, args.User);
    }

    private void OnInteractHand(EntityUid uid, InteractionPopupComponent component, InteractHandEvent args)
    {
        SharedInteract(uid, component, args, args.Target, args.User);
    }

    private void SharedInteract(
        EntityUid uid,
        InteractionPopupComponent component,
        HandledEntityEventArgs args,
        EntityUid target,
        EntityUid user)
    {
        if (args.Handled || user == target)
            return;

        //Handling does nothing and this thing annoyingly plays way too often.
        if (HasComp<SleepingComponent>(uid))
            return;

        args.Handled = true;

        var curTime = _gameTiming.CurTime;

        if (curTime < component.LastInteractTime + component.InteractDelay)
            return;

        if (TryComp<MobStateComponent>(uid, out var state)
            && !_mobStateSystem.IsAlive(uid, state))
        {
            return;
        }

        // TODO: Should be an attempt event
        // TODO: Need to handle pausing with an accumulator.

        string msg = ""; // Stores the text to be shown in the popup message
        SoundSpecifier? sfx = null; // Stores the filepath of the sound to be played

        if (_random.Prob(component.SuccessChance))
        {
            if (component.InteractSuccessString != null)
            {
                msg = Loc.GetString(component.InteractSuccessString, ("target", Identity.Entity(uid, EntityManager))); // Success message (localized).
                if (component.InteractSuccessString == "hugging-success-generic")
                {
                    var ev = new MoodEffectEvent("BeingHugged");
                    RaiseLocalEvent(uid, ev);
                }
                else if (component.InteractSuccessString.Contains("petting-success-"))
                {
                    var ev = new MoodEffectEvent("PetAnimal");
                    RaiseLocalEvent(uid, ev);
                }
            }

            if (component.InteractSuccessSound != null)
                sfx = component.InteractSuccessSound;

            if (component.InteractSuccessSpawn != null)
                Spawn(component.InteractSuccessSpawn, _transform.GetMapCoordinates(uid));
        }
        else
        {
            if (component.InteractFailureString != null)
                msg = Loc.GetString(component.InteractFailureString, ("target", Identity.Entity(uid, EntityManager))); // Failure message (localized).

            if (component.InteractFailureSound != null)
                sfx = component.InteractFailureSound;

            if (component.InteractFailureSpawn != null)
                Spawn(component.InteractFailureSpawn, _transform.GetMapCoordinates(uid));
        }

        if (component.MessagePerceivedByOthers != null)
        {
            var msgOthers = Loc.GetString(component.MessagePerceivedByOthers,
                ("user", Identity.Entity(user, EntityManager)), ("target", Identity.Entity(uid, EntityManager)));
            _popupSystem.PopupEntity(msg, uid, user);
            _popupSystem.PopupEntity(msgOthers, uid, Filter.PvsExcept(user, entityManager: EntityManager), true);
        }
        else
            _popupSystem.PopupEntity(msg, uid, user); //play only for the initiating entity.

        if (sfx is not null) //not all cases will have sound.
        {
            if (component.SoundPerceivedByOthers)
                _audio.PlayPvs(sfx, target); //play for everyone in range
            else
                _audio.PlayEntity(sfx, Filter.Entities(user, target), target, true); //play only for the initiating entity and its target.
        }

        component.LastInteractTime = curTime;
    }
}