Add the missing bits for the new region-search:

- Added lookup in the data-layer
  - MySQL works
  - SQLite doesn't have a grid-db, so it won't work there
  - I added MSSQL-code to the best of my knowledge; but I don't know MSSQL :-)
- Added the plumbing up to OGS1GridServices. This speaks with the grid-server
  via XMLRPC.
- Modified MapSearchModule to use the new data. It's backward compatible; if
  used with an old grid-server, it just returns one found region instead of a
  list.
- Refactored a bit.
Note: This updates data, grid-server and region code. No new files.

OpenSim/Data/GridDataBase.cs

@@ -25,6 +25,7 @@
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+using System.Collections.Generic;
 using OpenMetaverse;
 
 namespace OpenSim.Data
@@ -35,6 +36,7 @@ namespace OpenSim.Data
         public abstract RegionProfileData GetProfileByUUID(UUID UUID);
         public abstract RegionProfileData GetProfileByString(string regionName);
         public abstract RegionProfileData[] GetProfilesInRange(uint Xmin, uint Ymin, uint Xmax, uint Ymax);
+        public abstract List<RegionProfileData> GetRegionsByName(string namePrefix, uint maxNum);
         public abstract bool AuthenticateSim(UUID UUID, ulong regionHandle, string simrecvkey);
         public abstract DataResponse AddProfile(RegionProfileData profile);
         public abstract ReservationData GetReservationAtPoint(uint x, uint y);
@@ -44,6 +46,7 @@ namespace OpenSim.Data
         public abstract void Initialise();
         public abstract void Initialise(string connect);
         public abstract void Dispose();
+
         public abstract string Name { get; }
         public abstract string Version { get; }
     }

OpenSim/Data/IGridData.cs

@@ -25,6 +25,7 @@
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+using System.Collections.Generic;
 using OpenMetaverse;
 using OpenSim.Framework;
 
@@ -79,6 +80,14 @@ namespace OpenSim.Data
         /// <returns>An array containing all the sim profiles in the specified range</returns>
         RegionProfileData[] GetProfilesInRange(uint Xmin, uint Ymin, uint Xmax, uint Ymax);
 
+        /// <summary>
+        /// Returns up to maxNum profiles of regions that have a name starting with namePrefix
+        /// </summary>
+        /// <param name="name">The name to match against</param>
+        /// <param name="maxNum">Maximum number of profiles to return</param>
+        /// <returns>A list of sim profiles</returns>
+        List<RegionProfileData> GetRegionsByName(string namePrefix, uint maxNum);
+        
         /// <summary>
         /// Authenticates a sim by use of its recv key.
         /// WARNING: Insecure

OpenSim/Data/MSSQL/MSSQLGridData.cs

@@ -216,6 +216,33 @@ namespace OpenSim.Data.MSSQL
             return null;
         }
 
+        
+        /// <summary>
+        /// Returns up to maxNum profiles of regions that have a name starting with namePrefix
+        /// </summary>
+        /// <param name="name">The name to match against</param>
+        /// <param name="maxNum">Maximum number of profiles to return</param>
+        /// <returns>A list of sim profiles</returns>
+        override public List<RegionProfileData> GetRegionsByName (string namePrefix, uint maxNum)
+        {
+            using (AutoClosingSqlCommand command = database.Query("SELECT * FROM regions WHERE regionName LIKE @name"))
+            {
+                command.Parameters.Add(database.CreateParameter("name", namePrefix + "%"));
+
+                List<RegionProfileData> rows = new List<RegionProfileData>();
+
+                using (SqlDataReader reader = command.ExecuteReader())
+                {
+                    while (rows.Count < maxNum && reader.Read())
+                    {
+                        rows.Add(ReadSimRow(reader));
+                    }
+                }
+
+                return rows;
+            }
+        }
+
         /// <summary>
         /// Returns a sim profile from its location
         /// </summary>

OpenSim/Data/MySQL/MySQLGridData.cs

@@ -282,6 +282,52 @@ namespace OpenSim.Data.MySQL
             }
         }
 
+        /// <summary>
+        /// Returns up to maxNum profiles of regions that have a name starting with namePrefix
+        /// </summary>
+        /// <param name="name">The name to match against</param>
+        /// <param name="maxNum">Maximum number of profiles to return</param>
+        /// <returns>A list of sim profiles</returns>
+        override public List<RegionProfileData> GetRegionsByName(string namePrefix, uint maxNum)
+        {
+            MySQLSuperManager dbm = GetLockedConnection();
+
+            try
+            {
+                Dictionary<string, string> param = new Dictionary<string, string>();
+                param["?name"] = namePrefix + "%";
+
+                IDbCommand result =
+                    dbm.Manager.Query(
+                        "SELECT * FROM regions WHERE regionName LIKE ?name",
+                        param);
+                IDataReader reader = result.ExecuteReader();
+
+                RegionProfileData row;
+
+                List<RegionProfileData> rows = new List<RegionProfileData>();
+
+                while (rows.Count < maxNum && (row = dbm.Manager.readSimRow(reader)) != null)
+                {
+                    rows.Add(row);
+                }
+                reader.Close();
+                result.Dispose();
+
+                return rows;
+            }
+            catch (Exception e)
+            {
+                dbm.Manager.Reconnect();
+                m_log.Error(e.ToString());
+                return null;
+            }
+            finally
+            {
+                dbm.Release();
+            }
+        }
+
         /// <summary>
         /// Returns a sim profile from it's location
         /// </summary>

OpenSim/Data/SQLite/SQLiteGridData.cs

@@ -108,6 +108,18 @@ namespace OpenSim.Data.SQLite
             return null;
         }
 
+        
+        /// <summary>
+        /// Returns up to maxNum profiles of regions that have a name starting with namePrefix
+        /// </summary>
+        /// <param name="name">The name to match against</param>
+        /// <param name="maxNum">Maximum number of profiles to return</param>
+        /// <returns>A list of sim profiles</returns>
+        override public List<RegionProfileData> GetRegionsByName (string namePrefix, uint maxNum)
+        {
+            return null;
+        }
+
         /// <summary>
         /// Returns a sim profile from it's handle
         /// </summary>