363 lines
10 KiB
C#
363 lines
10 KiB
C#
using System;
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using System.Collections.Concurrent;
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using System.Reflection;
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using System.Threading;
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using Server.Items;
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using Server.Mobiles;
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using Server.Multis;
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namespace Server.Engines.AdvancedSearch;
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public class AdvancedSearchThreadWorker
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{
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private readonly Thread _thread;
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private readonly AutoResetEvent _startEvent; // Main thread tells the thread to start working
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private readonly AutoResetEvent _stopEvent; // Main thread waits for the worker finish draining
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private bool _pause;
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private bool _exit;
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private readonly ConcurrentQueue<IEntity> _entities;
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private ConcurrentQueue<AdvancedSearchResult> _results;
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private ConcurrentQueue<IEntity> _ignoreQueue;
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private WorldLocation _worldLocation;
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private AdvancedSearchFilter _filter;
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public AdvancedSearchThreadWorker()
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{
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_startEvent = new AutoResetEvent(false);
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_stopEvent = new AutoResetEvent(false);
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_entities = new ConcurrentQueue<IEntity>();
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_thread = new Thread(Execute);
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_thread.Start(this);
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}
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public void Wake(
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WorldLocation worldLocation,
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AdvancedSearchFilter filter,
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ConcurrentQueue<AdvancedSearchResult> results,
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ConcurrentQueue<IEntity> ignoreQueue
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)
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{
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_worldLocation = worldLocation;
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_filter = filter;
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_ignoreQueue = ignoreQueue;
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_results = results;
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_startEvent.Set();
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}
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public void Sleep()
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{
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Volatile.Write(ref _pause, true);
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_stopEvent.WaitOne();
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}
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public void Exit()
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{
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_exit = true;
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Wake(WorldLocation.Zero, null, null, null);
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Sleep();
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}
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public void Push(IEntity entity)
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{
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_entities.Enqueue(entity);
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}
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private static void Execute(object obj)
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{
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var worker = (AdvancedSearchThreadWorker)obj;
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var reader = worker._entities;
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while (worker._startEvent.WaitOne())
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{
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while (true)
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{
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var pauseRequested = Volatile.Read(ref worker._pause);
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if (reader.TryDequeue(out var entity))
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{
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var result = worker.DoEntitySearch(entity);
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if (result != null)
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{
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worker._results?.Enqueue(result);
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}
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}
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else if (pauseRequested) // Break when finished
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{
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worker._results = null;
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worker._filter = null;
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break;
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}
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}
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worker._stopEvent.Set(); // Allow the main thread to continue now that we are finished
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worker._pause = false;
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if (Core.Closing || worker._exit)
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{
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return;
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}
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}
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}
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private AdvancedSearchResult DoEntitySearch(IEntity entity)
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{
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if (_filter.HideValidInternalMap)
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{
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HandleValidInternal(entity);
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}
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// Check for valid map
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if (_filter.FilterFelucca && entity.Map != Map.Felucca ||
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_filter.FilterTrammel && entity.Map != Map.Trammel ||
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_filter.FilterIlshenar && entity.Map != Map.Ilshenar ||
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_filter.FilterMalas && entity.Map != Map.Malas ||
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_filter.FilterTokuno && entity.Map != Map.Tokuno ||
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_filter.FilterTerMur && entity.Map != Map.TerMur ||
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_filter.FilterInternalMap && entity.Map != Map.Internal ||
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_filter.FilterNullMap && entity.Map != null)
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{
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return null;
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}
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var location = (entity as Item)?.GetWorldLocation() ?? entity.Location;
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if (_filter.FilterRange &&
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(_filter.Range == null ||
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_filter.Range < 0 ||
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entity.Map != _worldLocation.Map ||
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!Utility.InRange(_worldLocation.Location, location, _filter.Range.Value)))
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{
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return null;
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}
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if (_filter.FilterRegion &&
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(string.IsNullOrWhiteSpace(_filter.RegionName) ||
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!Region.Find(location, entity.Map).IsPartOf(_filter.RegionName)))
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{
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return null;
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}
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if (entity is Mobile mobile)
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{
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return DoMobileSearch(mobile);
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}
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if (entity is Item item)
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{
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return DoItemSearch(item);
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}
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return null;
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}
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private static bool IsValidInternal(Item item)
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{
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if (item.Parent != null || item.HeldBy != null)
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{
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return true;
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}
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if (item is Fists
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or MountItem
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or EffectItem
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or MovingCrate
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or BaseDockedBoat
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or BaseBoat
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or Plank
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or TillerMan
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or Hold)
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{
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return true;
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}
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// DisplayCache container
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if (item.GetType().DeclaringType == typeof(GenericBuyInfo))
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{
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return true;
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}
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return false;
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}
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private AdvancedSearchResult DoItemSearch(Item item)
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{
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if (_filter.FilterName && !string.IsNullOrWhiteSpace(_filter.Name) && !(item.Name ?? item.ItemData.Name).InsensitiveContains(_filter.Name))
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{
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return null;
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}
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if (_filter.HideValidInternalMap && item.Map == Map.Internal && !IsValidInternal(item))
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{
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return null;
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}
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if (_filter.FilterPropertyTest &&
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(string.IsNullOrWhiteSpace(_filter.PropertyTest) || !EvaluateRecursive(item, _filter.PropertyTest)))
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{
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return null;
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}
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return new AdvancedSearchResult(item.Name ?? item.ItemData.Name, item.GetType(), item.Location, item.Map, item.RootParent)
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{
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Entity = item,
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};
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}
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private AdvancedSearchResult DoMobileSearch(Mobile mobile)
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{
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if (_filter.FilterName && !string.IsNullOrWhiteSpace(_filter.Name) && !mobile.Name.InsensitiveContains(_filter.Name))
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{
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return null;
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}
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if (_filter.HideValidInternalMap && mobile.Map == Map.Internal && !IsValidInternal(mobile))
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{
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return null;
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}
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if (_filter.FilterPropertyTest &&
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(string.IsNullOrWhiteSpace(_filter.PropertyTest) || !EvaluateRecursive(mobile, _filter.PropertyTest)))
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{
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return null;
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}
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return new AdvancedSearchResult(mobile.Name, mobile.GetType(), mobile.Location, mobile.Map, null)
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{
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Entity = mobile
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};
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}
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private static bool IsValidInternal(Mobile m)
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{
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// Logged out players
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if (m.Account != null)
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{
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return true;
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}
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// Stabled pets
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if (m is BaseCreature creature && creature.IsStabled)
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{
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return true;
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}
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// Internalized vendors
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if (m is PlayerVendor playerVendor && playerVendor.House != null)
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{
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return true;
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}
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// Currently mounted creatures
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if (m is IMount mount && mount.Rider != null)
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{
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return true;
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}
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return false;
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}
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public void HandleValidInternal(IEntity entity)
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{
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if (entity is CommodityDeed deed && deed.Commodity != null && deed.Commodity.Map == Map.Internal)
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{
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_ignoreQueue.Enqueue(entity);
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return;
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}
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// Keys don't have a backreference, so we just ignore them for now
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if (entity is KeyRing keyring && keyring.Keys?.Count > 0)
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{
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foreach (var k in keyring.Keys)
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{
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_ignoreQueue.Enqueue(k);
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}
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return;
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}
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if (entity is BaseHouse house)
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{
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foreach (var relEntity in house.RelocatedEntities)
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{
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if (relEntity.Entity is Item)
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{
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_ignoreQueue.Enqueue(relEntity.Entity);
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}
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}
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foreach (var inventory in house.VendorInventories)
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{
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foreach (var subItem in inventory.Items)
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{
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_ignoreQueue.Enqueue(subItem);
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}
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}
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}
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}
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private static bool EvaluateRecursive(IEntity entity, ReadOnlySpan<char> span)
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{
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var atIndex = span.IndexOf('@');
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var orIndex = span.IndexOf('|');
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if (atIndex == -1 && orIndex == -1)
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{
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return EvaluateSingleExpression(entity, span);
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}
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var result = atIndex != -1;
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var splitIndex = result ? atIndex : orIndex;
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var left = EvaluateRecursive(entity, span.Slice(0, splitIndex));
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var right = EvaluateRecursive(entity, span.Slice(splitIndex + 1));
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return result ? left && right : left || right;
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}
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private static bool EvaluateSingleExpression(IEntity entity, ReadOnlySpan<char> expression)
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{
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var negate = false;
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if (expression[0] == '~')
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{
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negate = true;
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expression = expression[1..];
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}
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var operatorSpan = AdvancedSearchUtilities.FindOperatorIndex(expression, out var operatorIndex);
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if (operatorSpan.Length == 0)
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{
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return false;
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}
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var propertyName = expression[..operatorIndex].Trim();
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var valuePart = expression[(operatorIndex + operatorSpan.Length)..].Trim();
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if (valuePart.Length == 0)
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{
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return false;
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}
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var properties = entity.GetType().GetProperties();
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PropertyInfo property = null;
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for (var i = 0; i < properties.Length; ++i)
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{
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var p = properties[i];
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if (p.CanRead && p.Name.InsensitiveEquals(propertyName))
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{
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property = p;
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break;
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}
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}
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if (property == null)
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{
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return false;
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}
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var propertyValue = property.GetValue(entity);
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var result = AdvancedSearchUtilities.CompareValues(property.PropertyType, propertyValue, valuePart, operatorSpan);
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return negate ? !result : result;
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}
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}
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