merge GEO PR (incomplete)

StackExchange.Redis.Tests/ConnectionFailedErrors.cs

@@ -117,7 +117,9 @@ public void CheckFailureRecovered()
                 ClearAmbientFailures();
             }
         }
+
 #endif
+
         [Test]
         public void TryGetAzureRoleInstanceIdNoThrow()
         {

StackExchange.Redis.Tests/GeoTests.cs

+using System.Linq;
+using NUnit.Framework;
+
+namespace StackExchange.Redis.Tests
+{
+    [TestFixture]
+    public class GeoTests : TestBase
+    {
+        [Test]
+        public void GeoAddEveryWay()
+        {
+            using (var conn = Create())
+            {
+                var db = conn.GetDatabase(3);
+                var added1 = db.GeoAdd("Sicily", 14.361389, 39.115556, "PalermoPlusOne");
+                var geo1 = new GeoEntry(13.361389, 38.115556, "Palermo");
+                var geo2 = new GeoEntry(15.087269, 37.502669, "Catania");
+                var added2 = db.GeoAdd("Sicily",new GeoEntry[] {geo1,geo2});
+                Assert.IsTrue(added1 & (added2==2));
+            }
+        }
+
+        [Test]
+        public void GetGeoDist()
+        {
+            using (var conn = Create())
+            {
+                var db = conn.GetDatabase(3);
+                var geo1 = new GeoEntry(13.361389, 38.115556, "Palermo");
+                var geo2 = new GeoEntry(15.087269, 37.502669, "Catania");
+                var added2 = db.GeoAdd("Sicily", new GeoEntry[] { geo1, geo2 });
+                var val = db.GeoDistance("Sicily", "Palermo", "Catania",GeoUnit.Meters);
+                Assert.Equals(166274.15156960039, (double) val);
+            }
+        }
+    }
+}

StackExchange.Redis/StackExchange/Redis/GeoEntry.cs

+
+using System;
+
+namespace StackExchange.Redis
+{
+    /// <summary>
+    /// GeoRadius command options.
+    /// </summary>
+    [Flags]
+    public enum GeoRadiusOptions
+    {
+        /// <summary>
+        /// No Options
+        /// </summary>
+        None = 0,
+        /// <summary>
+        /// Redis will return the coordinates of any results.
+        /// </summary>
+        WithCoordinates = 1,
+        /// <summary>
+        /// Redis will return the distance from center for all results.
+        /// </summary>
+        WithDistance = 2,
+        /// <summary>
+        /// Redis will return the geo hash value as an integer. (This is the score in the sorted set)
+        /// </summary>
+        WithGeoHash = 4
+    }
+
+    /// <summary>
+    /// The result of a GeoRadius command.
+    /// </summary>
+    public struct GeoRadiusResult
+    {
+        /// <summary>
+        /// The matched member.
+        /// </summary>
+        public RedisValue Member { get; }
+
+        /// <summary>
+        /// The original GeoRadius command
+        /// </summary>
+        public GeoRadius Command { get; }
+
+        /// <summary>
+        /// The distance of the matched member from the center of the geo radius command.
+        /// </summary>
+        public double? DistanceFromCenter { get; }
+
+        /// <summary>
+        /// The Geo Hash of the matched member as an integer. (The key in the sorted set)
+        /// </summary>
+        public long? GeoHash { get; }
+
+        /// <summary>
+        /// The coordinates of the matched member.
+        /// </summary>
+        public GeoPosition? GeoPosition { get; }
+
+        /// <summary>
+        /// Returns a new GeoRadiusResult
+        /// </summary>
+        public GeoRadiusResult(RedisValue member,GeoRadius command,double? distanceFromCenter,long? geoHash,GeoPosition? geoPosition)
+        {
+            Member = member;
+            Command = command;
+            DistanceFromCenter = distanceFromCenter;
+            GeoHash = geoHash;
+            GeoPosition = geoPosition;
+        }
+
+      
+
+    }
+
+    /// <summary>
+    /// Represents a GeoRadius command and its options.
+    /// </summary>
+    public class GeoRadius
+    {
+        /// <summary>
+        /// The Radius size of this GeoRadius command.
+        /// </summary>
+        public double Radius { get; }
+
+        /// <summary>
+        /// The center point to base the search.
+        /// </summary>
+        public GeoPosition GeoPosition { get; }
+
+        /// <summary>
+        /// The key to use.
+        /// </summary>
+        public RedisKey Key { get; }
+
+        /// <summary>
+        /// The unit to return distance measurments in.
+        /// </summary>
+        public GeoUnit Unit { get; }
+
+        /// <summary>
+        /// The possible options for the GeoRadius command
+        /// </summary>
+        public GeoRadiusOptions GeoRadiusOptions { get; }
+
+        /// <summary>
+        /// The maximum number of results to return.
+        /// However note that internally the command needs to perform an effort proportional to the number of items matching the specified area, so to query very large areas with a very small COUNT option may be slow even if just a few results are returned.
+        /// </summary>
+        public int MaxReturnCount { get; }
+
+        /// <summary>
+        /// Creates a new GeoRadius
+        /// </summary>
+        public GeoRadius(RedisKey key,GeoPosition geoPosition,double radius,int maxReturnCount =-1,GeoUnit unit = GeoUnit.Meters,GeoRadiusOptions geoRadiusOptions = (GeoRadiusOptions.WithCoordinates | GeoRadiusOptions.WithDistance | GeoRadiusOptions.WithGeoHash))
+        {
+            Key = key;
+            GeoPosition = geoPosition;
+            Radius = radius;
+            Unit = unit;
+            GeoRadiusOptions = geoRadiusOptions;
+            MaxReturnCount = maxReturnCount;
+        }
+
+        public bool HasFlag(GeoRadiusOptions flag)
+        {
+            return (GeoRadiusOptions & flag) != 0;
+        }
+    }
+
+    /// <summary>
+    /// Describes the longitude and latitude of a GeoEntry
+    /// </summary>
+    public struct GeoPosition : IEquatable<GeoPosition>
+    {
+        /// <summary>
+        /// The Latitude of the GeoPosition
+        /// </summary>
+        public double Latitude { get; }
+
+        /// <summary>
+        /// The Logitude of the GeoPosition
+        /// </summary>
+        public double Longitude { get; }
+
+        /// <summary>
+        /// Creates a new GeoPosition
+        /// </summary>
+        /// <param name="longitude"></param>
+        /// <param name="latitude"></param>
+        public GeoPosition(double longitude,double latitude)
+        {
+            Longitude = longitude;
+            Latitude = latitude;
+        }
+
+        /// <summary>
+        /// See Object.ToString()
+        /// </summary>
+        public override string ToString()
+        {
+            return string.Format("{0} {1}", Longitude, Latitude);
+        }
+        /// <summary>
+        /// See Object.GetHashCode()
+        /// Diagonals not an issue in the case of lat/long
+        /// </summary>
+        public override int GetHashCode()
+        {
+            // diagonals not an issue in the case of lat/long
+            return Longitude.GetHashCode() ^ Latitude.GetHashCode();
+        }
+        /// <summary>
+        /// Compares two values for equality
+        /// </summary>
+        public override bool Equals(object obj)
+        {
+            return obj is GeoPosition && Equals((GeoPosition)obj);
+        }
+        /// <summary>
+        /// Compares two values for equality
+        /// </summary>
+        public bool Equals(GeoPosition value)
+        {
+            return this == value;
+        }
+        /// <summary>
+        /// Compares two values for equality
+        /// </summary>
+        public static bool operator ==(GeoPosition x, GeoPosition y)
+        {
+            return x.Longitude == y.Longitude && x.Latitude == y.Latitude;
+        }
+        /// <summary>
+        /// Compares two values for non-equality
+        /// </summary>
+        public static bool operator !=(GeoPosition x, GeoPosition y)
+        {
+            return x.Longitude!= y.Longitude || x.Latitude != y.Latitude;
+        }
+    }
+
+    /// <summary>
+    /// Describes a GeoEntry element with the corresponding value
+    /// GeoEntries are stored in redis as SortedSetEntries
+    /// </summary>
+    public struct GeoEntry : IEquatable<GeoEntry>
+    {
+        /// <summary>
+        /// The name of the geo entry
+        /// </summary>
+        public string Member { get; }
+
+        /// <summary>
+        /// Describes the longitude and latitude of a GeoEntry
+        /// </summary>
+        public GeoPosition Point { get; }
+
+        /// <summary>
+        /// Initializes a GeoEntry value
+        /// </summary>
+        public GeoEntry(double longitude,double latitude,RedisValue member)
+        {
+            Member = member;
+            Point = new GeoPosition(longitude, latitude);
+        }
+
+       
+
+        /// <summary>
+        /// The longitude of the geo entry
+        /// </summary>
+        public double Longitude => Point.Longitude;
+
+        /// <summary>
+        /// The latitude of the geo entry
+        /// </summary>
+        public double Latitude => Point.Latitude;
+
+        /// <summary>
+        /// See Object.ToString()
+        /// </summary>
+        public override string ToString()
+       {
+            return $"({Longitude},{Latitude})={Member}";
+        }
+        /// <summary>
+        /// See Object.GetHashCode()
+        /// </summary>
+        public override int GetHashCode()
+        {
+            return Point.GetHashCode() ^ Member.GetHashCode();
+        }
+        /// <summary>
+        /// Compares two values for equality
+        /// </summary>
+        public override bool Equals(object obj)
+        {
+            return obj is GeoEntry && Equals((GeoEntry)obj);
+        }
+        /// <summary>
+        /// Compares two values for equality
+        /// </summary>
+        public bool Equals(GeoEntry value)
+        {
+            return this == value;
+        }
+        /// <summary>
+        /// Compares two values for equality
+        /// </summary>
+        public static bool operator ==(GeoEntry x, GeoEntry y)
+        {
+            return Equals(x.Point, y.Point) && x.Member == y.Member;
+        }
+        /// <summary>
+        /// Compares two values for non-equality
+        /// </summary>
+        public static bool operator !=(GeoEntry x, GeoEntry y)
+        {
+            return !Equals(x.Point, y.Point) || x.Member != y.Member;
+        }
+    }
+}
\ No newline at end of file

StackExchange.Redis/StackExchange/Redis/GeoUnit.cs

+using System;
+using System.ComponentModel;
+
+namespace StackExchange.Redis
+{
+    /// <summary>
+    /// Units associated with Geo Commands
+    /// </summary>
+    public enum GeoUnit
+    {
+        /// <summary>
+        /// Meters/Metres
+        /// </summary>
+        Meters,
+        /// <summary>
+        /// Kilometers/Kilometres
+        /// </summary>
+        Kilometers,
+        /// <summary>
+        /// Miles
+        /// </summary>
+        Miles,
+        /// <summary>
+        /// Feet
+        /// </summary>
+        Feet
+    }
+}
\ No newline at end of file

StackExchange.Redis/StackExchange/Redis/IDatabase.cs

@@ -44,6 +44,79 @@ public interface IDatabase : IRedis, IDatabaseAsync
         /// <remarks>http://redis.io/commands/debug-object</remarks>
         RedisValue DebugObject(RedisKey key, CommandFlags flags = CommandFlags.None);
 
+        /// <summary>
+        /// Add the specified member to the set stored at key. Specified members that are already a member of this set are ignored. If key does not exist, a new set is created before adding the specified members.
+        /// </summary>
+        /// <returns>True if the specified member was not already present in the set, else False</returns>
+        /// <remarks>http://redis.io/commands/geoadd</remarks>
+        bool GeoAdd(RedisKey key, double longitude, double latitude, RedisValue member, CommandFlags flags = CommandFlags.None);
+
+
+        /// <summary>
+        /// Add the specified member to the set stored at key. Specified members that are already a member of this set are ignored. If key does not exist, a new set is created before adding the specified members.
+        /// </summary>
+        /// <returns>True if the specified member was not already present in the set, else False</returns>
+        /// <remarks>http://redis.io/commands/geoadd</remarks>
+        bool GeoAdd(RedisKey key, StackExchange.Redis.GeoEntry geoPosition, RedisValue member, CommandFlags flags = CommandFlags.None);
+
+
+        /// <summary>
+        /// Add the specified members to the set stored at key. Specified members that are already a member of this set are ignored. If key does not exist, a new set is created before adding the specified members.
+        /// </summary>
+        /// <returns>the number of elements that were added to the set, not including all the elements already present into the set.</returns>
+        /// <remarks>http://redis.io/commands/geoadd</remarks>
+        long GeoAdd(RedisKey key, GeoEntry[] geoEntries, CommandFlags flags = CommandFlags.None);
+
+        /// <summary>
+        /// Removes the specified member from the geo sorted set stored at key. Non existing members are ignored.
+        /// </summary>
+        /// <returns>True if the member existed in the sorted set and was removed; False otherwise.</returns>
+        /// <remarks>http://redis.io/commands/zrem</remarks>
+        bool GeoRemove(RedisKey key, RedisValue member, CommandFlags flags = CommandFlags.None);
+
+        /// <summary>
+        /// Return the distance between two members in the geospatial index represented by the sorted set.
+        /// </summary>
+        /// <returns>The command returns the distance as a double (represented as a string) in the specified unit, or NULL if one or both the elements are missing.</returns>
+        /// <remarks>http://redis.io/commands/geodist</remarks>
+        double GeoDistance(RedisKey key, RedisValue member1, RedisValue member2, GeoUnit geoUnit = GeoUnit.Meters, CommandFlags flags = CommandFlags.None);
+
+        /// <summary>
+        /// Return valid Geohash strings representing the position of one or more elements in a sorted set value representing a geospatial index (where elements were added using GEOADD).
+        /// </summary>
+        /// <returns>The command returns an array where each element is the Geohash corresponding to each member name passed as argument to the command.</returns>
+        /// <remarks>http://redis.io/commands/geohash</remarks>
+        string[] GeoHash(RedisKey key, string[] members, CommandFlags flags = CommandFlags.None);
+
+        /// <summary>
+        /// Return valid Geohash strings representing the position of one or more elements in a sorted set value representing a geospatial index (where elements were added using GEOADD).
+        /// </summary>
+        /// <returns>The command returns an array where each element is the Geohash corresponding to each member name passed as argument to the command.</returns>
+        /// <remarks>http://redis.io/commands/geohash</remarks>
+        string[] GeoHash(RedisKey key, string member, CommandFlags flags = CommandFlags.None);
+
+
+        /// <summary>
+        /// Return the positions (longitude,latitude) of all the specified members of the geospatial index represented by the sorted set at key.
+        /// </summary>
+        /// <returns>The command returns an array where each element is a two elements array representing longitude and latitude (x,y) of each member name passed as argument to the command.Non existing elements are reported as NULL elements of the array.</returns>
+        /// <remarks>http://redis.io/commands/geopos</remarks>
+        GeoPosition?[] GeoPos(RedisKey key, string[] members, CommandFlags flags = CommandFlags.None);
+
+        /// <summary>
+        /// Return the positions (longitude,latitude) of all the specified members of the geospatial index represented by the sorted set at key.
+        /// </summary>
+        /// <returns>The command returns an array where each element is a two elements array representing longitude and latitude (x,y) of each member name passed as argument to the command.Non existing elements are reported as NULL elements of the array.</returns>
+        /// <remarks>http://redis.io/commands/geopos</remarks>
+        GeoPosition? GeoPos(RedisKey key, string member, CommandFlags flags = CommandFlags.None);
+
+        /// <summary>
+        /// Return the members of a sorted set populated with geospatial information using GEOADD, which are within the borders of the area specified with the center location and the maximum distance from the center (the radius).
+        /// </summary>
+        /// <returns>GeoRadiusResult[]</returns>
+        /// <remarks>http://redis.io/commands/georadius</remarks>
+        GeoRadiusResult[] GeoRadius(RedisKey redisKey, GeoRadius geoRadius, CommandFlags flags = CommandFlags.None);
+
         /// <summary>
         /// Decrements the number stored at field in the hash stored at key by decrement. If key does not exist, a new key holding a hash is created. If field does not exist or holds a string that cannot be interpreted as integer, the value is set to 0 before the operation is performed.
         /// </summary>
@@ -486,7 +559,6 @@ public interface IDatabase : IRedis, IDatabaseAsync
         /// <returns>True if the specified member was not already present in the set, else False</returns>
         /// <remarks>http://redis.io/commands/sadd</remarks>
         bool SetAdd(RedisKey key, RedisValue value, CommandFlags flags = CommandFlags.None);
-
         /// <summary>
         /// Add the specified members to the set stored at key. Specified members that are already a member of this set are ignored. If key does not exist, a new set is created before adding the specified members.
         /// </summary>

StackExchange.Redis/StackExchange/Redis/KeyspaceIsolation/DatabaseWrapper.cs

@@ -27,6 +27,55 @@ public RedisValue DebugObject(RedisKey key, CommandFlags flags = CommandFlags.No
             return Inner.DebugObject(ToInner(key), flags);
         }
 
+        public bool GeoAdd(RedisKey key, double longitude, double latitude, RedisValue member, CommandFlags flags = CommandFlags.None)
+        {
+            return Inner.GeoAdd(ToInner(key), longitude, latitude, member, flags);
+        }
+
+        public long GeoAdd(RedisKey key, GeoEntry[] geoEntries, CommandFlags flags = CommandFlags.None)
+        {
+            return Inner.GeoAdd(ToInner(key), geoEntries, flags);
+        }
+        public bool GeoAdd(RedisKey key, GeoEntry geoEntry, RedisValue member, CommandFlags flags = CommandFlags.None)
+        {
+            return Inner.GeoAdd(key, geoEntry, member, flags);
+        }
+
+        public bool GeoRemove(RedisKey key, RedisValue member, CommandFlags flags = CommandFlags.None)
+        {
+            return Inner.GeoRemove(key, member, flags);
+        }
+
+        public double GeoDistance(RedisKey key, RedisValue value0, RedisValue value1, GeoUnit geoUnit = GeoUnit.Meters,CommandFlags flags = CommandFlags.None)
+        {
+            return Inner.GeoDistance(ToInner(key), value0, value1, geoUnit, flags);
+        }
+
+        public string[] GeoHash(RedisKey key, string[] members, CommandFlags flags = CommandFlags.None)
+        {
+            return Inner.GeoHash(key, members, flags);
+        }
+
+        public string[] GeoHash(RedisKey key, string member, CommandFlags flags = CommandFlags.None)
+        {
+            return Inner.GeoHash(key, member, flags);
+        }
+
+        public GeoPosition?[] GeoPos(RedisKey key, string[] members, CommandFlags flags = CommandFlags.None)
+        {
+            return Inner.GeoPos(key, members, flags);
+        }
+
+        public GeoPosition? GeoPos(RedisKey key, string member, CommandFlags flags = CommandFlags.None)
+        {
+            return Inner.GeoPos(key, member, flags);
+        }
+
+        public GeoRadiusResult[] GeoRadius(RedisKey key, GeoRadius geoRadius, CommandFlags flags = CommandFlags.None)
+        {
+            return Inner.GeoRadius(key, geoRadius, flags);
+        }
+
         public double HashDecrement(RedisKey key, RedisValue hashField, double value, CommandFlags flags = CommandFlags.None)
         {
             return Inner.HashDecrement(ToInner(key), hashField, value, flags);

StackExchange.Redis/StackExchange/Redis/Message.cs

@@ -350,6 +350,18 @@ public static Message Create(int db, CommandFlags flags, RedisCommand command, R
             return new CommandKeyValueValueValueMessage(db, flags, command, key, value0, value1, value2);
         }
 
+        public static Message Create(int db, CommandFlags flags, RedisCommand command, RedisKey key, GeoEntry[] values)
+        {
+            var redisValues = new List<RedisValue>();
+            foreach (var value in values)
+            {
+                redisValues.Add(value.Point.Longitude);
+                redisValues.Add(value.Point.Latitude);
+                redisValues.Add(value.Member);
+            }
+            return new CommandKeyValuesMessage(db,flags,command,key,redisValues.ToArray());
+        }
+
         public static Message Create(int db, CommandFlags flags, RedisCommand command, RedisKey key, RedisValue value0, RedisValue value1, RedisValue value2, RedisValue value3)
         {
             return new CommandKeyValueValueValueValueMessage(db, flags, command, key, value0, value1, value2, value3);
@@ -571,6 +583,20 @@ internal static Message Create(int db, CommandFlags flags, RedisCommand command,
             }
         }
 
+        internal static Message Create(int db, CommandFlags flags, RedisCommand command, RedisKey key, RedisValue[] values,GeoRadius geoRadius)
+        {
+            if (values == null) throw new ArgumentNullException(nameof(values));
+            switch (values.Length)
+            {
+                case 0: return new CommandKeyMessage(db, flags, command, key);
+                case 1: return new CommandKeyValueMessage(db, flags, command, key, values[0]);
+                case 2: return new CommandKeyValueValueMessage(db, flags, command, key, values[0], values[1]);
+                case 3: return new CommandKeyValueValueValueMessage(db, flags, command, key, values[0], values[1], values[2]);
+                case 4: return new CommandKeyValueValueValueValueMessage(db, flags, command, key, values[0], values[1], values[2], values[3]);
+                default: return new CommandKeyValuesMessage(db, flags, command, key, values);
+            }
+        }
+
         internal static Message Create(int db, CommandFlags flags, RedisCommand command, RedisKey key0, RedisValue[] values, RedisKey key1)
         {
             if (values == null) throw new ArgumentNullException(nameof(values));

StackExchange.Redis/StackExchange/Redis/RawResult.cs

@@ -231,6 +231,42 @@ internal RedisValue[] GetItemsAsValues()
             }
         }
         
+        internal GeoPosition?[] GetItemsAsGeoPositionArray()
+        {
+            RawResult[] items = GetItems();
+            if (items == null)
+            {
+                return null;
+            }
+            else if (items.Length == 0)
+            {
+                return new GeoPosition?[0];
+            }
+            else
+            {
+                var arr = new GeoPosition?[items.Length];
+                for (int i = 0; i < arr.Length; i++)
+                {
+                    RawResult[] item = items[i].GetArrayOfRawResults();
+                    if (item == null)
+                    {
+                        arr[i] = null;
+                    }
+                    else
+                    {
+                        arr[i] = new GeoPosition((double)item[0].AsRedisValue(), (double)item[1].AsRedisValue());
+                    }
+                }
+                return arr;
+            }
+        }
+
+        internal RawResult[] GetItemsAsRawResults()
+        {
+            return GetItems();
+        }
+
+
         // returns an array of RawResults
         internal RawResult[] GetArrayOfRawResults()
         {

StackExchange.Redis/StackExchange/Redis/RedisCommand.cs

@@ -38,6 +38,13 @@ enum RedisCommand
         FLUSHALL,
         FLUSHDB,
 
+        GEOADD,
+        GEODIST,
+        GEOHASH,
+        GEOPOS,
+        GEORADIUS,
+        GEORADIUSBYMEMBER,
+
         GET,
         GETBIT,
         GETRANGE,

StackExchange.Redis/StackExchange/Redis/RedisDatabase.cs

 using System;
 using System.Collections.Generic;
+using System.Linq;
 using System.Net;
 using System.Threading.Tasks;
 
@@ -13,6 +14,7 @@ internal RedisDatabase(ConnectionMultiplexer multiplexer, int db, object asyncSt
             Database = db;
         }
 
+        private static string[] _redisUnits = new[] {"m", "km", "mi", "ft"};
         public object AsyncState => asyncState;
 
         public int Database { get; }
@@ -45,6 +47,134 @@ public RedisValue DebugObject(RedisKey key, CommandFlags flags = CommandFlags.No
             return ExecuteSync(msg, ResultProcessor.RedisValue);
         }
 
+        public bool GeoAdd(RedisKey key, double longitude,double latitude,RedisValue member,CommandFlags flags = CommandFlags.None)
+        {
+            return GeoAdd(key, new GeoEntry(longitude, latitude,member), member, flags);
+        }
+
+        public bool GeoAdd(RedisKey key, GeoEntry geoPosition, RedisValue member, CommandFlags flags = CommandFlags.None)
+        {
+            var msg = Message.Create(Database, flags, RedisCommand.GEOADD, key, geoPosition.Longitude, geoPosition.Latitude, member);
+            return ExecuteSync(msg, ResultProcessor.Boolean);
+        }
+
+        public long GeoAdd(RedisKey key, GeoEntry[] geoEntries, CommandFlags flags = CommandFlags.None)
+        {
+            if(geoEntries == null) throw new ArgumentNullException(nameof(geoEntries));
+            var msg = Message.Create(Database,flags, RedisCommand.GEOADD, key, geoEntries);
+            return ExecuteSync(msg, ResultProcessor.Int64);
+        }
+
+        public bool GeoRemove(RedisKey key, RedisValue member, CommandFlags flags = CommandFlags.None)
+        {
+            return SortedSetRemove(key, member, flags);
+        }
+
+        public double GeoDistance(RedisKey key, RedisValue value0, RedisValue value1, GeoUnit geoUnit = GeoUnit.Meters,CommandFlags flags = CommandFlags.None)
+        {
+            var msg = Message.Create(Database, flags, RedisCommand.GEODIST, key,value0,value1,_redisUnits[(int)geoUnit]);
+            return (double)ExecuteSync(msg, ResultProcessor.RedisValue);
+        }
+
+        public string[] GeoHash(RedisKey key, string[] members, CommandFlags flags = CommandFlags.None)
+        {
+            if(members == null)throw new ArgumentNullException(nameof(members));
+            var redisValues = new RedisValue[members.Length];
+            for (var i = 0; i < members.Length; i++) redisValues[i] = members[i];
+            var msg = Message.Create(Database, flags, RedisCommand.GEOHASH, key, redisValues);
+            var results = ExecuteSync(msg, ResultProcessor.RedisValueArray);
+            var retArray = new string[results.Length];
+            for (int i = 0; i < results.Length; i++)
+            {
+                retArray[i] = (string)results[i];
+            }
+            return retArray;
+        }
+
+        public string[] GeoHash(RedisKey key, string member, CommandFlags flags = CommandFlags.None)
+        {
+            return GeoHash(key, new[] {member}, flags);
+        }
+
+        public GeoPosition?[] GeoPos(RedisKey key, string[] members, CommandFlags flags = CommandFlags.None)
+        {
+            if (members == null) throw new ArgumentNullException(nameof(members));
+            var redisValues = new RedisValue[members.Length];
+            for (var i = 0; i < members.Length; i++) redisValues[i] = members[i];
+            var msg = Message.Create(Database, flags, RedisCommand.GEOPOS, key, redisValues);
+            return ExecuteSync(msg, ResultProcessor.RedisGeoPosition);
+        }
+
+        public GeoPosition? GeoPos(RedisKey key, string member, CommandFlags flags = CommandFlags.None)
+        {
+            return GeoPos(key, new string[] {member}, flags).FirstOrDefault();
+        }
+
+        public GeoRadiusResult[] GeoRadius(RedisKey key, GeoRadius geoRadius,CommandFlags flags = CommandFlags.None)
+        {
+            var redisValues = new List<RedisValue>();
+            redisValues.Add(geoRadius.GeoPosition.Longitude);
+            redisValues.Add(geoRadius.GeoPosition.Latitude);
+            redisValues.Add(geoRadius.Radius);
+            redisValues.Add(_redisUnits[(int)geoRadius.Unit]);
+            if(geoRadius.HasFlag(GeoRadiusOptions.WithCoordinates))
+                redisValues.Add("WITHCOORD");
+            if (geoRadius.HasFlag(GeoRadiusOptions.WithDistance))
+                redisValues.Add("WITHDIST");
+            if (geoRadius.HasFlag(GeoRadiusOptions.WithGeoHash))
+                redisValues.Add("WITHHASH");
+            if(geoRadius.MaxReturnCount >0)
+                redisValues.Add(geoRadius.MaxReturnCount);
+            var msg = Message.Create(Database, flags, RedisCommand.GEORADIUS, key, redisValues.ToArray());
+            var items = ExecuteSync(msg, ResultProcessor.RedisGeoRadius);
+
+            var arr = new GeoRadiusResult[items.Length];
+            for (int i = 0; i < arr.Length; i++)
+            {
+                RawResult[] item = items[i].GetArrayOfRawResults();
+                if (item == null)
+                {
+                    continue;
+                }
+                else
+                {
+                    var x = 0;
+                    var member = item[x++].AsRedisValue();
+                    var distance = geoRadius.HasFlag(GeoRadiusOptions.WithDistance) ? new double?((double)item[x++].AsRedisValue()) : null;
+                    GeoPosition? geoPosition;
+                    
+                   
+                    long? geoHash;
+                    if (geoRadius.HasFlag(GeoRadiusOptions.WithGeoHash))
+                    {
+                        long tempL;
+                        if (item[x++].TryGetInt64(out tempL))
+                            geoHash = new long?(tempL);
+                        else
+                            geoHash = new long?();
+
+                    }
+                    else
+                    {
+                        geoHash =null;
+                    }
+                    if (geoRadius.HasFlag(GeoRadiusOptions.WithCoordinates))
+                    {
+                        var radIem = item[x++].GetItemsAsRawResults();
+                        var longitude = (double)radIem[0].AsRedisValue();
+                        var latitude = (double)radIem[1].AsRedisValue();
+                        geoPosition = new GeoPosition?(new GeoPosition(longitude, latitude));
+                    }
+                    else
+                    {
+                        geoPosition = null;
+                    }
+                    var newRadiusResult = new GeoRadiusResult(member, geoRadius, distance, geoHash, geoPosition);
+                    arr[i] = newRadiusResult;
+                }
+            }
+            return arr;
+        }
         public Task<RedisValue> DebugObjectAsync(RedisKey key, CommandFlags flags = CommandFlags.None)
         {
             var msg = Message.Create(Database, flags, RedisCommand.DEBUG, RedisLiterals.OBJECT, key);
@@ -926,7 +1056,6 @@ public Task<RedisResult> ScriptEvaluateAsync(LoadedLuaScript script, object para
         {
             return script.EvaluateAsync(this, parameters, null, flags);
         }
-
         public bool SetAdd(RedisKey key, RedisValue value, CommandFlags flags = CommandFlags.None)
         {
             var msg = Message.Create(Database, flags, RedisCommand.SADD, key, value);

StackExchange.Redis/StackExchange/Redis/ResultProcessor.cs

@@ -66,6 +66,13 @@ abstract class ResultProcessor
 
         public static readonly ResultProcessor<RedisValue[]>
             RedisValueArray = new RedisValueArrayProcessor();
+
+        public static readonly ResultProcessor<GeoPosition?[]>
+            RedisGeoPosition = new RedisValueGeoPositionProcessor();
+
+        public static readonly ResultProcessor<RawResult[]>
+            RedisGeoRadius = new RedisGeoRadiusProcessor();
+
         public static readonly ResultProcessor<TimeSpan>
             ResponseTimer = new TimingProcessor();
 
@@ -1088,6 +1095,39 @@ protected override bool SetResultCore(PhysicalConnection connection, Message mes
                 return false;
             }
         }
+        
+        sealed class RedisValueGeoPositionProcessor : ResultProcessor<GeoPosition?[]>
+        {
+            protected override bool SetResultCore(PhysicalConnection connection, Message message, RawResult result)
+            {
+                switch (result.Type)
+                {
+                    case ResultType.MultiBulk:
+                        var arr = result.GetItemsAsGeoPositionArray();
+
+                        SetResult(message, arr);
+                        return true;
+                }
+                return false;
+            }
+        }
+
+        sealed class RedisGeoRadiusProcessor : ResultProcessor<RawResult[]>
+        {
+            protected override bool SetResultCore(PhysicalConnection connection, Message message, RawResult result)
+            {
+                switch (result.Type)
+                {
+                    case ResultType.MultiBulk:
+                        var arr = result.GetItemsAsRawResults();
+
+                        SetResult(message, arr);
+                        return true;
+                }
+                return false;
+            }
+        }
+
         sealed class RedisValueProcessor : ResultProcessor<RedisValue>
         {
             protected override bool SetResultCore(PhysicalConnection connection, Message message, RawResult result)

StackExchange.Redis/StackExchange/Redis/SortedSetEntry.cs

@@ -4,6 +4,10 @@
 
 namespace StackExchange.Redis
 {
+
+
+    
+
     /// <summary>
     /// Describes a sorted-set element with the corresponding value
     /// </summary>