reallife-gamemode/ReallifeGamemode.Server/Util/AttachmentSync.cs

using System;
using System.Collections.Generic;
using System.Linq;
using GTANetworkAPI;

public static class AttachmentSync
{
  /// <summary>
  /// Adds/Removes an attachment for an entity
  /// </summary>
  /// <param name="entity">The entity to attach the object to</param>
  /// <param name="attachment">The attachment, should be in string or long type</param>
  /// <param name="remove">Pass true to remove the specified attachment, false otherwise.</param>
 
  public static void AddAttachment(this Entity entity, dynamic attachment, bool remove)
  {
    if (!entity.HasData("Attachments"))
      entity.SetData("Attachments", new List<uint>());

    List<uint> currentAttachments = entity.GetData<List<uint>>("Attachments");

    uint attachmentHash = 0;

    if (attachment.GetType() == typeof(string))
      attachmentHash = NAPI.Util.GetHashKey(attachment);
    else
      attachmentHash = Convert.ToUInt32(attachment);

    if (attachmentHash == 0)
    {
      Console.WriteLine($"Attachment hash couldn't be found for { attachment }");
      return;
    }

    if (currentAttachments.IndexOf(attachmentHash) == -1) // if current attachment hasn't already been added
    {
      if (!remove) // if it needs to be added
      {
        currentAttachments.Add(attachmentHash);
      }
    }
    else if (remove) // if it was found and needs to be removed
    {
      currentAttachments.Remove(attachmentHash);
    }

    // send updated data to playerside
    entity.SetSharedData("attachmentsData", currentAttachments.Serialize());
  }

  /// <summary>
  /// Returns true if an entity has a certain attachment
  /// </summary>
  /// <param name="entity">The entity to check</param>
  /// <param name="attachment">The attachment to look for</param>
  /// <returns>True if attachment was found, false otherwise</returns>
  public static bool HasAttachment(this Entity entity, dynamic attachment)
  {
    if (!entity.HasData("Attachments"))
      return false;

    List<uint> currentAttachments = entity.GetData<List<uint>>("Attachments");

    uint attachmentHash = 0;

    if (attachment.GetType() == typeof(string))
      attachmentHash = NAPI.Util.GetHashKey(attachment);
    else
      attachmentHash = Convert.ToUInt32(attachment);

    if (attachmentHash == 0)
    {
      Console.WriteLine($"Attachment hash couldn't be found for { attachment }");
      return false;
    }

    return currentAttachments.IndexOf(attachmentHash) != -1;
  }

  /// <summary>
  /// Clears the entity's current attachments
  /// </summary>
  /// <param name="entity">The entity to clear the attachments of</param>
  public static void ClearAttachments(this Entity entity)
  {
    if (!entity.HasData("Attachments"))
      return;

    List<uint> currentAttachments = entity.GetData<List<uint>>("Attachments");

    if (currentAttachments.Count > 0)
    {
      for (int i = currentAttachments.Count - 1; i >= 0; i--)
      {
        entity.AddAttachment(currentAttachments[i], true);
      }
    }

    entity.SetData("Attachments", new List<uint>());
  }

  /// <summary>
  /// Serializes a list of attachments
  /// </summary>
  /// <param name="attachments">a list of attachments in uint type</param>
  /// <returns>serialized attachment string</returns>
  public static string Serialize(this List<uint> attachments)
  {
    return string.Join('|', attachments.Select(a => Base36Extensions.ToBase36(a)).ToArray());
  }
}

public class AttachmentSyncExample : Script
{
  //REQUIRED
  [ServerEvent(Event.PlayerConnected)]
  public void OnPlayerConnect(Player player)
  {
    // reset data on connect
    player.ClearAttachments();
    player.TriggerEvent("SERVER:LoadAttachments");
  }

  //REQUIRED
  [RemoteEvent("staticAttachments.Add")]
  private void OnStaticAttachmentAdd(Player player, string hash)
  {
    player.AddAttachment(Base36Extensions.FromBase36(hash), false);
  }

  //REQUIRED
  [RemoteEvent("staticAttachments.Remove")]
  private void OnStaticAttachmentRemove(Player player, string hash)
  {
    player.AddAttachment(Base36Extensions.FromBase36(hash), true);
  }

  //[Command("xdd")]
  public void attachment(Player player)
  {
    Vehicle veh = player.Vehicle;
    if (!player.HasAttachment("ammobox"))
    {
      player.AddAttachment("ammobox", false);
      player.PlayAnimation("anim@heists@box_carry@", "idle", 49);
      //veh.AddAttachment("weapondeal1", false);
      //veh.AddAttachment("weapondeal2", false);
    }
    else
    {
      player.StopAnimation();

      player.ClearAttachments();
    }
  }
  
 
}