182 lines
6.3 KiB
C#
Executable File
182 lines
6.3 KiB
C#
Executable File
using System;
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using System.Collections.Generic;
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using System.Runtime.InteropServices;
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using Dalamud.Game;
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using Dalamud.Game.Gui.PartyFinder.Types;
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using Dalamud.Hooking;
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using Dalamud.Plugin.Services;
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namespace XivCommon.Functions;
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/// <summary>
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/// A class containing Party Finder functionality
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/// </summary>
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public class PartyFinder : IDisposable {
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private static class Signatures {
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internal const string RequestListings = "48 89 5C 24 ?? 48 89 74 24 ?? 57 48 83 EC 40 0F 10 81";
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internal const string JoinCrossParty = "E8 ?? ?? ?? ?? 41 0F B7 07 49 8B CC";
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}
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private delegate byte RequestPartyFinderListingsDelegate(IntPtr agent, byte categoryIdx);
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private delegate IntPtr JoinPfDelegate(IntPtr manager, IntPtr a2, int type, IntPtr packetData, uint a5);
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private RequestPartyFinderListingsDelegate? RequestPartyFinderListings { get; }
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private Hook<RequestPartyFinderListingsDelegate>? RequestPfListingsHook { get; }
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private Hook<JoinPfDelegate>? JoinPfHook { get; }
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/// <summary>
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/// The delegate for party join events.
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/// </summary>
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public delegate void JoinPfEventDelegate(PartyFinderListing listing);
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/// <summary>
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/// <para>
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/// The event that is fired when the player joins a <b>cross-world</b> party via Party Finder.
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/// </para>
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/// <para>
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/// Requires the <see cref="Hooks.PartyFinderJoins"/> hook to be enabled.
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/// </para>
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/// </summary>
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public event JoinPfEventDelegate? JoinParty;
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private IPartyFinderGui PartyFinderGui { get; }
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private bool JoinsEnabled { get; }
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private bool ListingsEnabled { get; }
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private IntPtr PartyFinderAgent { get; set; } = IntPtr.Zero;
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private Dictionary<uint, PartyFinderListing> Listings { get; } = new();
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private int LastBatch { get; set; } = -1;
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/// <summary>
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/// <para>
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/// The current Party Finder listings that have been displayed.
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/// </para>
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/// <para>
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/// This dictionary is cleared and updated each time the Party Finder is requested, and it only contains the category selected in the Party Finder addon.
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/// </para>
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/// <para>
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/// Keys are the listing ID for fast lookup by ID. Values are the listing itself.
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/// </para>
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/// </summary>
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public IReadOnlyDictionary<uint, PartyFinderListing> CurrentListings => this.Listings;
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internal PartyFinder(ISigScanner scanner, IPartyFinderGui partyFinderGui, IGameInteropProvider interop, Hooks hooks) {
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this.PartyFinderGui = partyFinderGui;
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this.ListingsEnabled = hooks.HasFlag(Hooks.PartyFinderListings);
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this.JoinsEnabled = hooks.HasFlag(Hooks.PartyFinderJoins);
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if (this.ListingsEnabled || this.JoinsEnabled) {
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this.PartyFinderGui.ReceiveListing += this.ReceiveListing;
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}
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if (scanner.TryScanText(Signatures.RequestListings, out var requestPfPtr, "Party Finder listings")) {
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this.RequestPartyFinderListings = Marshal.GetDelegateForFunctionPointer<RequestPartyFinderListingsDelegate>(requestPfPtr);
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if (this.ListingsEnabled) {
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this.RequestPfListingsHook = interop.HookFromAddress<RequestPartyFinderListingsDelegate>(requestPfPtr, this.OnRequestPartyFinderListings);
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this.RequestPfListingsHook.Enable();
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}
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}
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if (this.JoinsEnabled && scanner.TryScanText(Signatures.JoinCrossParty, out var joinPtr, "Party Finder joins")) {
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this.JoinPfHook = interop.HookFromAddress<JoinPfDelegate>(joinPtr, this.JoinPfDetour);
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this.JoinPfHook.Enable();
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}
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}
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/// <inheritdoc />
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public void Dispose() {
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this.PartyFinderGui.ReceiveListing -= this.ReceiveListing;
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this.JoinPfHook?.Dispose();
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this.RequestPfListingsHook?.Dispose();
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}
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private void ReceiveListing(PartyFinderListing listing, PartyFinderListingEventArgs args) {
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if (args.BatchNumber != this.LastBatch) {
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this.Listings.Clear();
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}
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this.LastBatch = args.BatchNumber;
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this.Listings[listing.Id] = listing;
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}
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private byte OnRequestPartyFinderListings(IntPtr agent, byte categoryIdx) {
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this.PartyFinderAgent = agent;
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return this.RequestPfListingsHook!.Original(agent, categoryIdx);
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}
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private IntPtr JoinPfDetour(IntPtr manager, IntPtr a2, int type, IntPtr packetData, uint a5) {
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// Updated: 5.5
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const int idOffset = -0x20;
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var ret = this.JoinPfHook!.Original(manager, a2, type, packetData, a5);
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if (this.JoinParty == null || (JoinType) type != JoinType.PartyFinder || packetData == IntPtr.Zero) {
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return ret;
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}
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try {
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var id = (uint) Marshal.ReadInt32(packetData + idOffset);
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if (this.Listings.TryGetValue(id, out var listing)) {
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this.JoinParty?.Invoke(listing);
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}
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} catch (Exception ex) {
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Logger.Log.Error(ex, "Exception in PF join detour");
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}
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return ret;
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}
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/// <summary>
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/// <para>
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/// Refresh the Party Finder listings. This does not open the Party Finder.
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/// </para>
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/// <para>
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/// This maintains the currently selected category.
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/// </para>
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/// </summary>
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/// <exception cref="InvalidOperationException">If the <see cref="Hooks.PartyFinderListings"/> hook is not enabled or if the signature for this function could not be found</exception>
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public void RefreshListings() {
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if (this.RequestPartyFinderListings == null) {
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throw new InvalidOperationException("Could not find signature for Party Finder listings");
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}
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if (!this.ListingsEnabled) {
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throw new InvalidOperationException("PartyFinder hooks are not enabled");
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}
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// Updated 6.0
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const int categoryOffset = 11_031;
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if (this.PartyFinderAgent == IntPtr.Zero) {
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return;
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}
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var categoryIdx = Marshal.ReadByte(this.PartyFinderAgent + categoryOffset);
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this.RequestPartyFinderListings(this.PartyFinderAgent, categoryIdx);
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}
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}
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internal enum JoinType : byte {
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/// <summary>
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/// Join via invite or party conversion.
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/// </summary>
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Normal = 0,
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/// <summary>
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/// Join via Party Finder.
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/// </summary>
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PartyFinder = 1,
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Unknown2 = 2,
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/// <summary>
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/// Remain in cross-world party after leaving a duty.
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/// </summary>
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LeaveDuty = 3,
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Unknown4 = 4,
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}
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