aboutsummaryrefslogtreecommitdiffstatshomepage
path: root/OpenSim/Data/MySQL/MySQLInventoryData.cs
blob: 1a6f068d2414aeec71baaa231f5f33a415f36ca9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
/*
 * Copyright (c) Contributors, http://opensimulator.org/
 * See CONTRIBUTORS.TXT for a full list of copyright holders.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the OpenSim Project nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

using System;
using System.Collections.Generic;
using System.Reflection;
using log4net;
using MySql.Data.MySqlClient;
using OpenMetaverse;
using OpenSim.Framework;

namespace OpenSim.Data.MySQL
{
    /// <summary>
    /// A MySQL interface for the inventory server
    /// </summary>
    public class MySQLInventoryData : IInventoryDataPlugin
    {
        private static readonly ILog m_log
            = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);

        /// <summary>
        /// The database manager
        /// </summary>
        private MySQLManager database;

        public void Initialise()
        {
            m_log.Info("[MySQLInventoryData]: " + Name + " cannot be default-initialized!");
            throw new PluginNotInitialisedException (Name);
        }

        /// <summary>
        /// <para>Initialises Inventory interface</para>
        /// <para>
        /// <list type="bullet">
        /// <item>Loads and initialises the MySQL storage plugin</item>
        /// <item>warns and uses the obsolete mysql_connection.ini if connect string is empty.</item>
        /// <item>Check for migration</item>
        /// </list>
        /// </para>
        /// </summary>
        /// <param name="connect">connect string</param>
        public void Initialise(string connect)
        {
            if (connect != String.Empty)
            {
                database = new MySQLManager(connect);
            }
            else
            {
                m_log.Warn("Reverting to deprecated mysql_connection.ini file for connection info");
                IniFile GridDataMySqlFile = new IniFile("mysql_connection.ini");
                string settingHostname = GridDataMySqlFile.ParseFileReadValue("hostname");
                string settingDatabase = GridDataMySqlFile.ParseFileReadValue("database");
                string settingUsername = GridDataMySqlFile.ParseFileReadValue("username");
                string settingPassword = GridDataMySqlFile.ParseFileReadValue("password");
                string settingPooling = GridDataMySqlFile.ParseFileReadValue("pooling");
                string settingPort = GridDataMySqlFile.ParseFileReadValue("port");

                database =
                    new MySQLManager(settingHostname, settingDatabase, settingUsername, settingPassword, settingPooling,
                                     settingPort);
            }

            // This actually does the roll forward assembly stuff
            Assembly assem = GetType().Assembly;
            Migration m = new Migration(database.Connection, assem, "InventoryStore");
            m.Update();
        }

        /// <summary>
        /// The name of this DB provider
        /// </summary>
        /// <returns>Name of DB provider</returns>
        public string Name
        {
            get { return "MySQL Inventory Data Interface"; }
        }

        /// <summary>
        /// Closes this DB provider
        /// </summary>
        /// <remarks>do nothing</remarks>
        public void Dispose()
        {
            // Do nothing.
        }

        /// <summary>
        /// Returns the version of this DB provider
        /// </summary>
        /// <returns>A string containing the DB provider version</returns>
        public string Version
        {
            get { return database.getVersion(); }
        }

        /// <summary>
        /// Returns a list of items in a specified folder
        /// </summary>
        /// <param name="folderID">The folder to search</param>
        /// <returns>A list containing inventory items</returns>
        public List<InventoryItemBase> getInventoryInFolder(UUID folderID)
        {
            try
            {
                lock (database)
                {
                    List<InventoryItemBase> items = new List<InventoryItemBase>();

                    database.CheckConnection();

                    MySqlCommand result =
                        new MySqlCommand("SELECT * FROM inventoryitems WHERE parentFolderID = ?uuid",
                                         database.Connection);
                    result.Parameters.AddWithValue("?uuid", folderID.ToString());
                    MySqlDataReader reader = result.ExecuteReader();

                    while (reader.Read()) 
                    {
                        // A null item (because something went wrong) breaks everything in the folder
                        InventoryItemBase item = readInventoryItem(reader);
                        if (item != null)
                            items.Add(item);
                    }

                    reader.Close();
                    result.Dispose();

                    return items;
                }
            }
            catch (Exception e)
            {
                database.Reconnect();
                m_log.Error(e.ToString());
                return null;
            }
        }

        /// <summary>
        /// Returns a list of the root folders within a users inventory
        /// </summary>
        /// <param name="user">The user whos inventory is to be searched</param>
        /// <returns>A list of folder objects</returns>
        public List<InventoryFolderBase> getUserRootFolders(UUID user)
        {
            try
            {
                lock (database)
                {
                    database.CheckConnection();

                    MySqlCommand result =
                        new MySqlCommand(
                            "SELECT * FROM inventoryfolders WHERE parentFolderID = ?zero AND agentID = ?uuid",
                            database.Connection);
                    result.Parameters.AddWithValue("?uuid", user.ToString());
                    result.Parameters.AddWithValue("?zero", UUID.Zero.ToString());
                    MySqlDataReader reader = result.ExecuteReader();

                    List<InventoryFolderBase> items = new List<InventoryFolderBase>();
                    while (reader.Read())
                        items.Add(readInventoryFolder(reader));


                    reader.Close();
                    result.Dispose();

                    return items;
                }
            }
            catch (Exception e)
            {
                database.Reconnect();
                m_log.Error(e.ToString());
                return null;
            }
        }


        /// <summary>
        /// see <see cref="InventoryItemBase.getUserRootFolder"/>
        /// </summary>
        /// <param name="user">The user UUID</param>
        /// <returns></returns>
        public InventoryFolderBase getUserRootFolder(UUID user)
        {
            try
            {
                lock (database)
                {
                    database.CheckConnection();

                    MySqlCommand result =
                        new MySqlCommand(
                            "SELECT * FROM inventoryfolders WHERE parentFolderID = ?zero AND agentID = ?uuid",
                            database.Connection);
                    result.Parameters.AddWithValue("?uuid", user.ToString());
                    result.Parameters.AddWithValue("?zero", UUID.Zero.ToString());

                    MySqlDataReader reader = result.ExecuteReader();

                    List<InventoryFolderBase> items = new List<InventoryFolderBase>();
                    while (reader.Read())
                        items.Add(readInventoryFolder(reader));

                    InventoryFolderBase rootFolder = null;

                    // There should only ever be one root folder for a user.  However, if there's more
                    // than one we'll simply use the first one rather than failing.  It would be even
                    // nicer to print some message to this effect, but this feels like it's too low a
                    // to put such a message out, and it's too minor right now to spare the time to
                    // suitably refactor.
                    if (items.Count > 0)
                    {
                        rootFolder = items[0];
                    }

                    reader.Close();
                    result.Dispose();

                    return rootFolder;
                }
            }
            catch (Exception e)
            {
                database.Reconnect();
                m_log.Error(e.ToString());
                return null;
            }
        }

        /// <summary>
        /// Return a list of folders in a users inventory contained within the specified folder.
        /// This method is only used in tests - in normal operation the user always have one,
        /// and only one, root folder.
        /// </summary>
        /// <param name="parentID">The folder to search</param>
        /// <returns>A list of inventory folders</returns>
        public List<InventoryFolderBase> getInventoryFolders(UUID parentID)
        {
            try
            {
                lock (database)
                {
                    database.CheckConnection();

                    MySqlCommand result =
                        new MySqlCommand("SELECT * FROM inventoryfolders WHERE parentFolderID = ?uuid",
                                         database.Connection);
                    result.Parameters.AddWithValue("?uuid", parentID.ToString());
                    MySqlDataReader reader = result.ExecuteReader();

                    List<InventoryFolderBase> items = new List<InventoryFolderBase>();

                    while (reader.Read())
                        items.Add(readInventoryFolder(reader));

                    reader.Close();
                    result.Dispose();

                    return items;
                }
            }
            catch (Exception e)
            {
                database.Reconnect();
                m_log.Error(e.ToString());
                return null;
            }
        }

        /// <summary>
        /// Reads a one item from an SQL result
        /// </summary>
        /// <param name="reader">The SQL Result</param>
        /// <returns>the item read</returns>
        private static InventoryItemBase readInventoryItem(MySqlDataReader reader)
        {
            try
            {
                InventoryItemBase item = new InventoryItemBase();
                // Be a bit safer in parsing these because the
                // database doesn't enforce them to be not null, and
                // the inventory still works if these are weird in the
                // db

                UUID Owner = UUID.Zero;
                UUID Creator = UUID.Zero;
                UUID GroupID = UUID.Zero;
                UUID.TryParse((string)reader["avatarID"], out Owner);
                UUID.TryParse((string)reader["creatorID"], out Creator);
                UUID.TryParse((string)reader["groupID"], out GroupID);
                item.Owner = Owner;
                item.Creator = Creator;
                item.GroupID = GroupID;

                // Rest of the parsing.  If these UUID's fail, we're dead anyway
                item.ID = new UUID((string) reader["inventoryID"]);
                item.AssetID = new UUID((string) reader["assetID"]);
                item.AssetType = (int) reader["assetType"];
                item.Folder = new UUID((string) reader["parentFolderID"]);
                item.Name = (string) reader["inventoryName"];
                item.Description = (string) reader["inventoryDescription"];
                item.NextPermissions = (uint) reader["inventoryNextPermissions"];
                item.CurrentPermissions = (uint) reader["inventoryCurrentPermissions"];
                item.InvType = (int) reader["invType"];
                item.BasePermissions = (uint) reader["inventoryBasePermissions"];
                item.EveryOnePermissions = (uint) reader["inventoryEveryOnePermissions"];
                item.GroupPermissions = (uint) reader["inventoryGroupPermissions"];
                item.SalePrice = (int) reader["salePrice"];
                item.SaleType = Convert.ToByte(reader["saleType"]);
                item.CreationDate = (int) reader["creationDate"];
                item.GroupOwned = Convert.ToBoolean(reader["groupOwned"]);
                item.Flags = (uint) reader["flags"];

                return item;
            }
            catch (MySqlException e)
            {
                m_log.Error(e.ToString());
            }

            return null;
        }

        /// <summary>
        /// Returns a specified inventory item
        /// </summary>
        /// <param name="item">The item to return</param>
        /// <returns>An inventory item</returns>
        public InventoryItemBase getInventoryItem(UUID itemID)
        {
            try
            {
                lock (database)
                {
                    database.CheckConnection();

                    MySqlCommand result =
                        new MySqlCommand("SELECT * FROM inventoryitems WHERE inventoryID = ?uuid", database.Connection);
                    result.Parameters.AddWithValue("?uuid", itemID.ToString());
                    MySqlDataReader reader = result.ExecuteReader();

                    InventoryItemBase item = null;
                    if (reader.Read())
                        item = readInventoryItem(reader);

                    reader.Close();
                    result.Dispose();

                    return item;
                }
            }
            catch (Exception e)
            {
                database.Reconnect();
                m_log.Error(e.ToString());
            }
            return null;
        }

        /// <summary>
        /// Reads a list of inventory folders returned by a query.
        /// </summary>
        /// <param name="reader">A MySQL Data Reader</param>
        /// <returns>A List containing inventory folders</returns>
        protected static InventoryFolderBase readInventoryFolder(MySqlDataReader reader)
        {
            try
            {
                InventoryFolderBase folder = new InventoryFolderBase();
                folder.Owner = new UUID((string) reader["agentID"]);
                folder.ParentID = new UUID((string) reader["parentFolderID"]);
                folder.ID = new UUID((string) reader["folderID"]);
                folder.Name = (string) reader["folderName"];
                folder.Type = (short) reader["type"];
                folder.Version = (ushort) ((int) reader["version"]);
                return folder;
            }
            catch (Exception e)
            {
                m_log.Error(e.ToString());
            }

            return null;
        }


        /// <summary>
        /// Returns a specified inventory folder
        /// </summary>
        /// <param name="folder">The folder to return</param>
        /// <returns>A folder class</returns>
        public InventoryFolderBase getInventoryFolder(UUID folderID)
        {
            try
            {
                lock (database)
                {
                    database.CheckConnection();

                    MySqlCommand result =
                        new MySqlCommand("SELECT * FROM inventoryfolders WHERE folderID = ?uuid", database.Connection);
                    result.Parameters.AddWithValue("?uuid", folderID.ToString());
                    MySqlDataReader reader = result.ExecuteReader();

                    reader.Read();
                    InventoryFolderBase folder = readInventoryFolder(reader);
                    reader.Close();
                    result.Dispose();

                    return folder;
                }
            }
            catch (Exception e)
            {
                database.Reconnect();
                m_log.Error(e.ToString());
                return null;
            }
        }

        /// <summary>
        /// Adds a specified item to the database
        /// </summary>
        /// <param name="item">The inventory item</param>
        public void addInventoryItem(InventoryItemBase item)
        {
            string sql =
                "REPLACE INTO inventoryitems (inventoryID, assetID, assetType, parentFolderID, avatarID, inventoryName"
                    + ", inventoryDescription, inventoryNextPermissions, inventoryCurrentPermissions, invType"
                    + ", creatorID, inventoryBasePermissions, inventoryEveryOnePermissions, inventoryGroupPermissions, salePrice, saleType"
                    + ", creationDate, groupID, groupOwned, flags) VALUES ";
            sql +=
                "(?inventoryID, ?assetID, ?assetType, ?parentFolderID, ?avatarID, ?inventoryName, ?inventoryDescription"
                    + ", ?inventoryNextPermissions, ?inventoryCurrentPermissions, ?invType, ?creatorID"
                    + ", ?inventoryBasePermissions, ?inventoryEveryOnePermissions, ?inventoryGroupPermissions, ?salePrice, ?saleType, ?creationDate"
                    + ", ?groupID, ?groupOwned, ?flags)";

            try
            {
                database.CheckConnection();

                MySqlCommand result = new MySqlCommand(sql, database.Connection);
                result.Parameters.AddWithValue("?inventoryID", item.ID.ToString());
                result.Parameters.AddWithValue("?assetID", item.AssetID.ToString());
                result.Parameters.AddWithValue("?assetType", item.AssetType.ToString());
                result.Parameters.AddWithValue("?parentFolderID", item.Folder.ToString());
                result.Parameters.AddWithValue("?avatarID", item.Owner.ToString());
                result.Parameters.AddWithValue("?inventoryName", item.Name);
                result.Parameters.AddWithValue("?inventoryDescription", item.Description);
                result.Parameters.AddWithValue("?inventoryNextPermissions", item.NextPermissions.ToString());
                result.Parameters.AddWithValue("?inventoryCurrentPermissions",
                                               item.CurrentPermissions.ToString());
                result.Parameters.AddWithValue("?invType", item.InvType);
                result.Parameters.AddWithValue("?creatorID", item.Creator.ToString());
                result.Parameters.AddWithValue("?inventoryBasePermissions", item.BasePermissions);
                result.Parameters.AddWithValue("?inventoryEveryOnePermissions", item.EveryOnePermissions);
                result.Parameters.AddWithValue("?inventoryGroupPermissions", item.GroupPermissions);
                result.Parameters.AddWithValue("?salePrice", item.SalePrice);
                result.Parameters.AddWithValue("?saleType", item.SaleType);
                result.Parameters.AddWithValue("?creationDate", item.CreationDate);
                result.Parameters.AddWithValue("?groupID", item.GroupID);
                result.Parameters.AddWithValue("?groupOwned", item.GroupOwned);
                result.Parameters.AddWithValue("?flags", item.Flags);

                lock (database)
                {
                    result.ExecuteNonQuery();
                }

                result.Dispose();
            }
            catch (MySqlException e)
            {
                m_log.Error(e.ToString());
            }
        }

        /// <summary>
        /// Updates the specified inventory item
        /// </summary>
        /// <param name="item">Inventory item to update</param>
        public void updateInventoryItem(InventoryItemBase item)
        {
            addInventoryItem(item);
        }

        /// <summary>
        /// Detele the specified inventory item
        /// </summary>
        /// <param name="item">The inventory item UUID to delete</param>
        public void deleteInventoryItem(UUID itemID)
        {
            try
            {
                database.CheckConnection();

                MySqlCommand cmd =
                    new MySqlCommand("DELETE FROM inventoryitems WHERE inventoryID=?uuid", database.Connection);
                cmd.Parameters.AddWithValue("?uuid", itemID.ToString());

                lock (database)
                {
                    cmd.ExecuteNonQuery();
                }
            }
            catch (MySqlException e)
            {
                database.Reconnect();
                m_log.Error(e.ToString());
            }
        }

        public InventoryItemBase queryInventoryItem(UUID itemID)
        {
            return getInventoryItem(itemID);
        }

        /// <summary>
        /// Creates a new inventory folder
        /// </summary>
        /// <param name="folder">Folder to create</param>
        public void addInventoryFolder(InventoryFolderBase folder)
        {
            string sql =
                "REPLACE INTO inventoryfolders (folderID, agentID, parentFolderID, folderName, type, version) VALUES ";
            sql += "(?folderID, ?agentID, ?parentFolderID, ?folderName, ?type, ?version)";

            database.CheckConnection();

            MySqlCommand cmd = new MySqlCommand(sql, database.Connection);
            cmd.Parameters.AddWithValue("?folderID", folder.ID.ToString());
            cmd.Parameters.AddWithValue("?agentID", folder.Owner.ToString());
            cmd.Parameters.AddWithValue("?parentFolderID", folder.ParentID.ToString());
            cmd.Parameters.AddWithValue("?folderName", folder.Name);
            cmd.Parameters.AddWithValue("?type", (short) folder.Type);
            cmd.Parameters.AddWithValue("?version", folder.Version);

            try
            {
                lock (database)
                {
                    cmd.ExecuteNonQuery();
                }
            }
            catch (Exception e)
            {
                m_log.Error(e.ToString());
            }
        }

        /// <summary>
        /// Updates an inventory folder
        /// </summary>
        /// <param name="folder">Folder to update</param>
        public void updateInventoryFolder(InventoryFolderBase folder)
        {
            addInventoryFolder(folder);
        }

        /// <summary>
        /// Move an inventory folder
        /// </summary>
        /// <param name="folder">Folder to move</param>
        /// <remarks>UPDATE inventoryfolders SET parentFolderID=?parentFolderID WHERE folderID=?folderID</remarks>
        public void moveInventoryFolder(InventoryFolderBase folder)
        {
            string sql =
                "UPDATE inventoryfolders SET parentFolderID=?parentFolderID WHERE folderID=?folderID";

            database.CheckConnection();

            MySqlCommand cmd = new MySqlCommand(sql, database.Connection);
            cmd.Parameters.AddWithValue("?folderID", folder.ID.ToString());
            cmd.Parameters.AddWithValue("?parentFolderID", folder.ParentID.ToString());

            try
            {
                lock (database)
                {
                    cmd.ExecuteNonQuery();
                }
            }
            catch (Exception e)
            {
                m_log.Error(e.ToString());
            }
        }

        /// <summary>
        /// Append a list of all the child folders of a parent folder
        /// </summary>
        /// <param name="folders">list where folders will be appended</param>
        /// <param name="parentID">ID of parent</param>
        protected void getInventoryFolders(ref List<InventoryFolderBase> folders, UUID parentID)
        {
            List<InventoryFolderBase> subfolderList = getInventoryFolders(parentID);

            foreach (InventoryFolderBase f in subfolderList)
                folders.Add(f);
        }


        /// <summary>
        /// See IInventoryDataPlugin
        /// </summary>
        /// <param name="parentID"></param>
        /// <returns></returns>
        public List<InventoryFolderBase> getFolderHierarchy(UUID parentID)
        {
            /* Note: There are subtle changes between this implementation of getFolderHierarchy and the previous one
                 * - We will only need to hit the database twice instead of n times.
                 * - We assume the database is well-formed - no stranded/dangling folders, all folders in heirarchy owned
                 *   by the same person, each user only has 1 inventory heirarchy
                 * - The returned list is not ordered, instead of breadth-first ordered
               There are basically 2 usage cases for getFolderHeirarchy:
                 1) Getting the user's entire inventory heirarchy when they log in
                 2) Finding a subfolder heirarchy to delete when emptying the trash.
               This implementation will pull all inventory folders from the database, and then prune away any folder that
               is not part of the requested sub-heirarchy. The theory is that it is cheaper to make 1 request from the
               database than to make n requests. This pays off only if requested heirarchy is large.
               By making this choice, we are making the worst case better at the cost of making the best case worse.
               This way is generally better because we don't have to rebuild the connection/sql query per subfolder,
               even if we end up getting more data from the SQL server than we need.
                 - Francis
             */
            try
            {
                List<InventoryFolderBase> folders = new List<InventoryFolderBase>();
                Dictionary<UUID, List<InventoryFolderBase>> hashtable
                    = new Dictionary<UUID, List<InventoryFolderBase>>(); ;
                List<InventoryFolderBase> parentFolder = new List<InventoryFolderBase>();
                lock (database)
                {
                    MySqlCommand result;
                    MySqlDataReader reader;
                    bool buildResultsFromHashTable = false;

                    database.CheckConnection();

                    /* Fetch the parent folder from the database to determine the agent ID, and if
                     * we're querying the root of the inventory folder tree */
                    result = new MySqlCommand("SELECT * FROM inventoryfolders WHERE folderID = ?uuid",
                                              database.Connection);
                    result.Parameters.AddWithValue("?uuid", parentID.ToString());
                    reader = result.ExecuteReader();
                    while (reader.Read())          // Should be at most 1 result
                        parentFolder.Add(readInventoryFolder(reader));
                    reader.Close();
                    result.Dispose();

                    if (parentFolder.Count >= 1)   // No result means parent folder does not exist
                    {
                        if (parentFolder[0].ParentID == UUID.Zero) // We are querying the root folder
                        {
                            /* Get all of the agent's folders from the database, put them in a list and return it */
                            result = new MySqlCommand("SELECT * FROM inventoryfolders WHERE agentID = ?uuid",
                                                      database.Connection);
                            result.Parameters.AddWithValue("?uuid", parentFolder[0].Owner.ToString());
                            reader = result.ExecuteReader();
                            while (reader.Read())
                            {
                                InventoryFolderBase curFolder = readInventoryFolder(reader);
                                if (curFolder.ID != parentID) // Do not need to add the root node of the tree to the list
                                    folders.Add(curFolder);
                            }
                            reader.Close();
                            result.Dispose();
                        } // if we are querying the root folder
                        else // else we are querying a subtree of the inventory folder tree
                        {
                            /* Get all of the agent's folders from the database, put them all in a hash table
                             * indexed by their parent ID */
                            result = new MySqlCommand("SELECT * FROM inventoryfolders WHERE agentID = ?uuid",
                                                      database.Connection);
                            result.Parameters.AddWithValue("?uuid", parentFolder[0].Owner.ToString());
                            reader = result.ExecuteReader();
                            while (reader.Read())
                            {
                                InventoryFolderBase curFolder = readInventoryFolder(reader);
                                if (hashtable.ContainsKey(curFolder.ParentID))      // Current folder already has a sibling
                                    hashtable[curFolder.ParentID].Add(curFolder);   // append to sibling list
                                else // else current folder has no known (yet) siblings
                                {
                                    List<InventoryFolderBase> siblingList = new List<InventoryFolderBase>();
                                    siblingList.Add(curFolder);
                                    // Current folder has no known (yet) siblings
                                    hashtable.Add(curFolder.ParentID, siblingList);
                                }
                            } // while more items to read from the database
                            reader.Close();
                            result.Dispose();

                            // Set flag so we know we need to build the results from the hash table after
                            // we unlock the database
                            buildResultsFromHashTable = true;

                        } // else we are querying a subtree of the inventory folder tree
                    } // if folder parentID exists

                    if (buildResultsFromHashTable)
                    {
                        /* We have all of the user's folders stored in a hash table indexed by their parent ID
                         * and we need to return the requested subtree. We will build the requested subtree
                         * by performing a breadth-first-search on the hash table */
                        if (hashtable.ContainsKey(parentID))
                            folders.AddRange(hashtable[parentID]);
                        for (int i = 0; i < folders.Count; i++) // **Note: folders.Count is *not* static
                            if (hashtable.ContainsKey(folders[i].ID))
                                folders.AddRange(hashtable[folders[i].ID]);
                    }
                } // lock (database)
                return folders;
            }
            catch (Exception e)
            {
                database.Reconnect();
                m_log.Error(e.ToString());
                return null;
            }
        }

        /// <summary>
        /// Delete a folder from database
        /// </summary>
        /// <param name="folderID">the folder UUID</param>
        protected void deleteOneFolder(UUID folderID)
        {
            try
            {
                database.CheckConnection();

                MySqlCommand cmd =
                    new MySqlCommand("DELETE FROM inventoryfolders WHERE folderID=?uuid", database.Connection);
                cmd.Parameters.AddWithValue("?uuid", folderID.ToString());

                lock (database)
                {
                    cmd.ExecuteNonQuery();
                }
            }
            catch (MySqlException e)
            {
                database.Reconnect();
                m_log.Error(e.ToString());
            }
        }

        /// <summary>
        /// Delete all item in a folder
        /// </summary>
        /// <param name="folderID">the folder UUID</param>
        protected void deleteItemsInFolder(UUID folderID)
        {
            try
            {
                database.CheckConnection();

                MySqlCommand cmd =
                    new MySqlCommand("DELETE FROM inventoryitems WHERE parentFolderID=?uuid", database.Connection);
                cmd.Parameters.AddWithValue("?uuid", folderID.ToString());

                lock (database)
                {
                    cmd.ExecuteNonQuery();
                }
            }
            catch (MySqlException e)
            {
                database.Reconnect();
                m_log.Error(e.ToString());
            }
        }

        /// <summary>
        /// Deletes an inventory folder
        /// </summary>
        /// <param name="folderId">Id of folder to delete</param>
        public void deleteInventoryFolder(UUID folderID)
        {
            List<InventoryFolderBase> subFolders = getFolderHierarchy(folderID);

            //Delete all sub-folders
            foreach (InventoryFolderBase f in subFolders)
            {
                deleteOneFolder(f.ID);
                deleteItemsInFolder(f.ID);
            }

            //Delete the actual row
            deleteOneFolder(folderID);
            deleteItemsInFolder(folderID);
        }
        
        public List<InventoryItemBase> fetchActiveGestures(UUID avatarID)
        {
            MySqlDataReader result = null;
            MySqlCommand sqlCmd = null;
            lock (database)
            {
                try
                {
                    database.CheckConnection();
                    sqlCmd = new MySqlCommand(
                        "SELECT * FROM inventoryitems WHERE avatarId = ?uuid AND assetType = ?type and flags = 1",
                        database.Connection);
                    sqlCmd.Parameters.AddWithValue("?uuid", avatarID.ToString());
                    sqlCmd.Parameters.AddWithValue("?type", (int)AssetType.Gesture);
                    result = sqlCmd.ExecuteReader();

                    List<InventoryItemBase> list = new List<InventoryItemBase>();
                    while (result.Read())
                    {
                        InventoryItemBase item = readInventoryItem(result);
                        if (item != null)
                            list.Add(item);
                    }
                    return list;
                }
                catch (Exception e)
                {
                    database.Reconnect();
                    m_log.Error(e.ToString());
                    return null;
                }
                finally
                {
                    if (result != null) result.Close();
                    if (sqlCmd != null) sqlCmd.Dispose();
                }
            }
        }
    }
}