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using System;
using System.Collections.Generic;
using StardewModdingAPI.Framework.Networking;
using StardewValley;
namespace StardewModdingAPI.Framework.ModHelpers
{
/// <summary>Provides multiplayer utilities.</summary>
internal class MultiplayerHelper : BaseHelper, IMultiplayerHelper
{
/*********
** Fields
*********/
/// <summary>SMAPI's core multiplayer utility.</summary>
private readonly SMultiplayer Multiplayer;
/*********
** Public methods
*********/
/// <summary>Construct an instance.</summary>
/// <param name="modID">The unique ID of the relevant mod.</param>
/// <param name="multiplayer">SMAPI's core multiplayer utility.</param>
public MultiplayerHelper(string modID, SMultiplayer multiplayer)
: base(modID)
{
this.Multiplayer = multiplayer;
}
/// <summary>Get a new multiplayer ID.</summary>
public long GetNewID()
{
return this.Multiplayer.getNewID();
}
/// <summary>Get the locations which are being actively synced from the host.</summary>
public IEnumerable<GameLocation> GetActiveLocations()
{
return this.Multiplayer.activeLocations();
}
/// <summary>Get a connected player.</summary>
/// <param name="id">The player's unique ID.</param>
/// <returns>Returns the connected player, or <c>null</c> if no such player is connected.</returns>
public IMultiplayerPeer GetConnectedPlayer(long id)
{
return this.Multiplayer.Peers.TryGetValue(id, out MultiplayerPeer peer)
? peer
: null;
}
/// <summary>Get all connected players.</summary>
public IEnumerable<IMultiplayerPeer> GetConnectedPlayers()
{
return this.Multiplayer.Peers.Values;
}
/// <summary>Send a message to mods installed by connected players.</summary>
/// <typeparam name="TMessage">The data type. This can be a class with a default constructor, or a value type.</typeparam>
/// <param name="message">The data to send over the network.</param>
/// <param name="messageType">A message type which receiving mods can use to decide whether it's the one they want to handle, like <c>SetPlayerLocation</c>. This doesn't need to be globally unique, since mods should check the originating mod ID.</param>
/// <param name="modIDs">The mod IDs which should receive the message on the destination computers, or <c>null</c> for all mods. Specifying mod IDs is recommended to improve performance, unless it's a general-purpose broadcast.</param>
/// <param name="playerIDs">The <see cref="Farmer.UniqueMultiplayerID" /> values for the players who should receive the message, or <c>null</c> for all players. If you don't need to broadcast to all players, specifying player IDs is recommended to reduce latency.</param>
/// <exception cref="ArgumentNullException">The <paramref name="message"/> or <paramref name="messageType" /> is null.</exception>
public void SendMessage<TMessage>(TMessage message, string messageType, string[] modIDs = null, long[] playerIDs = null)
{
this.Multiplayer.BroadcastModMessage(
message: message,
messageType: messageType,
fromModID: this.ModID,
toModIDs: modIDs,
toPlayerIDs: playerIDs
);
}
}
}
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