WIP

AuroraSignal.test/CursorList.test.cs

@@ -1,8 +1,7 @@
-using System;
-using System.Collections.Generic;
 using Xunit;
 using Aurora;
 using Aurora.Services.Signal;
+using Aurora.Cursor;
 
 
 namespace AuroraSignal.test
@@ -14,57 +13,30 @@ namespace AuroraSignal.test
         [InlineData(SortDirection.Desc)]
         public void CursorListSortOnStringValue(SortDirection direction)
         {
-            CursorList<Party> cursor = new CursorList<Party>();
+            CursorList<Party> list = new CursorList<Party>();
-            cursor.Add(new Party(){Name = "asdf", PartyId = "1111"});
+            list.Add(new Party() { Name = "asdf", Id = "1111" });
-            cursor.Add(new Party(){Name = "bsdf", PartyId = "2222"});
+            list.Add(new Party() { Name = "bsdf", Id = "2222" });
-            cursor.Add(new Party(){Name = "csdf", PartyId = "3333"});
+            list.Add(new Party() { Name = "csdf", Id = "3333" });
 
-            List<Party> result = cursor.WithSort("Name", direction).Get();
+            CursorResult<Party> result = new Cursor<Party>(ref list)
+                .WithSort(item => item.Value.Name, direction)
+                .GetNextPage();
 
-            if(direction == SortDirection.Desc)
+            if (direction == SortDirection.Desc)
             {
-                Assert.Collection<Party>(cursor, 
+                Assert.Collection<Party>(result.Result,
                     item => item.Name.Equals("asdf"),
                     item => item.Name.Equals("bsdf"),
                     item => item.Name.Equals("csdf"));
             }
             else
             {
-                Assert.Collection<Party>(cursor, 
+                Assert.Collection<Party>(result.Result,
                     item => item.Name.Equals("csdf"),
                     item => item.Name.Equals("bsdf"),
                     item => item.Name.Equals("asdf"));
 
             }
         }
-
-        [Theory()]
-        [InlineData(SortDirection.Asc)]
-        [InlineData(SortDirection.Desc)]
-        public void CursorListSortOnIntValue(SortDirection direction)
-        {
-            CursorList<object> cursor = new CursorList<object>();
-            cursor.Add(new {Name = "asdf", PartyId = 1111});
-            cursor.Add(new {Name = "bsdf", PartyId = 2222});
-            cursor.Add(new {Name = "csdf", PartyId = 3333});
-
-            List<object> result = cursor.WithSort("PartyId", direction).Get();
-
-            if(direction == SortDirection.Desc)
-            {
-                Assert.Collection<object>(cursor, 
-                    item => item.Equals(new {Name = "asdf", PartyId = 1111}), 
-                    item => item.Equals(new {Name = "bsdf", PartyId = 2222}), 
-                    item => item.Equals(new {Name = "csdf", PartyId = 3333}));
-            }
-            else
-            {
-                Assert.Collection<object>(cursor, 
-                    item => item.Equals(new {Name = "csdf", PartyId = 3333}), 
-                    item => item.Equals(new {Name = "bsdf", PartyId = 2222}),  
-                    item => item.Equals(new {Name = "asdf", PartyId = 1111}));
-
-            }
-        }
     }
 }

AuroraSignal/Src/Augments/Party.cs

@@ -0,0 +1,9 @@
+using Aurora.Cursor;
+
+namespace Aurora.Services.Signal
+{
+    public partial class Party : ICursorObject
+    {
+    }
+}
+

AuroraSignal/Src/Cursor/Cursor.cs

@@ -0,0 +1,112 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+#nullable enable
+namespace Aurora.Cursor
+{
+    public enum SortDirection
+    {
+        Asc,
+        Desc,
+    }
+
+    public class Cursor<T> where T : ICursorObject
+    {
+        private CursorList<T> _list;
+
+        private string? _previousPageToken;
+        private string? _nextPageToken;
+        private int _pageSize;
+        private Func<KeyValuePair<string, T>, string> _sortDelgate;
+        private SortDirection _direction;
+        public Cursor(ref CursorList<T> list)
+        {
+            this._list = list;
+            this._previousPageToken = string.Empty;
+            this._nextPageToken = string.Empty;
+            this._pageSize = 10;
+            this._sortDelgate = delegate (KeyValuePair<string, T> item)
+            {
+                return item.Value.Id;
+            };
+        }
+
+        public CursorResult<T> GetNextPage()
+        {
+            List<KeyValuePair<string, T>> tmpList;
+
+            // Sort reference list
+            if (this._direction == SortDirection.Desc)
+            {
+                tmpList = this._list.OrderByDescending(this._sortDelgate).ToList();
+
+            }
+            else
+            {
+                tmpList = this._list.OrderBy(this._sortDelgate).ToList();
+            }
+
+            if (tmpList == null)
+            {
+                throw new System.NullReferenceException();
+            }
+
+            int startIdx = 0;
+            if (!string.IsNullOrEmpty(this._nextPageToken))
+            {
+                // TODO find another way to index into the list that's not a regular array search
+                startIdx = tmpList.FindIndex(item => item.Key == this._nextPageToken);
+            }
+
+            int endIdx = startIdx + this._pageSize;
+
+            List<T> selection = new List<T>();
+
+            // Get page
+            for (int i = startIdx; i < tmpList.Count && i < endIdx; i++)
+            {
+                selection.Add(tmpList.ElementAt(i).Value);
+            }
+
+            return new CursorResult<T>
+            {
+                NextPageToken = selection[selection.Count - 1].Id,
+                PrevPageToken = selection[0].Id,
+                Count = this._list.Count,
+                Result = selection
+            };
+        }
+
+        public CursorResult<T> GetPreviousPage()
+        {
+            throw new NotImplementedException();
+        }
+
+        public Cursor<T> WithNextPage(string nextPageToken)
+        {
+            this._nextPageToken = nextPageToken;
+            return this;
+        }
+
+        public Cursor<T> WithPreviousPage(string prevPageToken)
+        {
+            this._previousPageToken = prevPageToken;
+            return this;
+        }
+
+        public Cursor<T> WithSort(Func<KeyValuePair<string, T>, string> sortDelegate, SortDirection direction)
+        {
+            this._sortDelgate = sortDelegate;
+            this._direction = direction;
+            return this;
+        }
+
+        public Cursor<T> WithSize(int size)
+        {
+            this._pageSize = size;
+            return this;
+        }
+    }
+
+}

AuroraSignal/Src/Cursor/CursorList.cs

@@ -0,0 +1,32 @@
+using System.Collections.Generic;
+using System.Collections;
+using System;
+using System.Linq;
+using Aurora.Utils;
+
+#nullable enable
+namespace Aurora.Cursor
+{
+
+    public class CursorList<T> : SortedList<string, T> where T : ICursorObject
+    {
+
+        public CursorList()
+        {
+        }
+
+        public CursorList<T> Add(T item)
+        {
+            string itemHashId = HashUtil.GetHash(new string[] { item.Id, item.GetHashCode().ToString() }).ToString();
+            bool res = this.TryAdd(itemHashId, item);
+
+            if (res == false)
+            {
+                throw new System.Exception("Failed to add item to cursor list");
+            }
+            return this;
+        }
+
+
+    }
+}

AuroraSignal/Src/Cursor/CursorObject.cs

@@ -0,0 +1,9 @@
+using System.Collections.Generic;
+
+namespace Aurora.Cursor
+{
+    public interface ICursorObject
+    {
+        string Id { get; set; }
+    }
+}

AuroraSignal/Src/Cursor/CursorResult.cs

@@ -0,0 +1,25 @@
+using System.Collections.Generic;
+
+namespace Aurora.Cursor
+{
+    public class CursorResult<T>
+    {
+        public CursorResult()
+        {
+            Result = new List<T>();
+        }
+
+        public CursorResult(CursorResult<T> cpy)
+        {
+            NextPageToken = cpy.NextPageToken;
+            PrevPageToken = cpy.PrevPageToken;
+            Result = cpy.Result;
+            Count = cpy.Count;
+        }
+
+        public string NextPageToken { get; set; }
+        public string PrevPageToken { get; set; }
+        public List<T> Result { get; set; }
+        public int Count { get; set; }
+    }
+}

AuroraSignal/Src/CursorList.cs

@@ -1,94 +0,0 @@
-using System.Collections.Generic;
-
-namespace Aurora
-{
-    public enum SortDirection {
-        Asc,
-        Desc,
-    }
-
-    public class CursorList<T> : List<T>
-    {
-        private string _orderBy;
-        private SortDirection _direction;
-        private string _previousPageToken;
-        private string _nextPageToken;
-        private int _pageSize;
-
-        public CursorList(){
-            this._direction = SortDirection.Desc;
-            this._orderBy = string.Empty;
-            this._previousPageToken = string.Empty;
-            this._nextPageToken = string.Empty;
-            this._pageSize = 10;
-        }
-
-        public CursorList<T> WithNextPage(string nextPageToken){
-            this._nextPageToken = nextPageToken;
-            return this;
-        }
-
-        public CursorList<T> WithPreviousPage(string prevPageToken){
-            this._previousPageToken = prevPageToken;
-            return this;
-        }
-
-        public CursorList<T> WithSort(string orderBy, SortDirection direction ) {
-            this._orderBy = orderBy;
-            this._direction = direction;
-            return this;
-        }
-
-        public CursorList<T> WithSize(int size){
-            this._pageSize = size;
-            return this;
-        }
-
-        public List<T> Get(){
-            if(this._nextPageToken != string.Empty && this._previousPageToken != string.Empty){
-                throw new System.InvalidOperationException("Cannot specify both next and previous page tokens");
-            }
-
-            List<T> tmpList = new List<T>(this);
-
-
-            tmpList.Sort(delegate(T first, T second){
-                object firstVal = first.GetType().GetProperty(this._orderBy).GetValue(first, null);
-                object secondVal = first.GetType().GetProperty(this._orderBy).GetValue(second, null);
-                int compare = 0;
-
-                if(firstVal == null && secondVal == null)
-                {
-                    compare = 0;
-                } 
-                else if(firstVal == null)
-                {
-                    compare = 1;
-                } 
-                else if(secondVal == null)
-                {
-                    compare = -1;
-                }
-                else 
-                {
-                    
-                    // Determine number or string types
-                    if(firstVal is string)
-                    {
-                        string firstStr = firstVal as string;
-                        string secondStr = secondVal as string;
-                        compare = firstStr.CompareTo(secondStr);
-                    } else if(firstVal is int)
-                    {
-                        int? firstInt = firstVal as int?;
-                        int? secondInt = secondVal as int?;
-                        compare = firstInt > secondInt ? 1 : -1;
-                    }
-                }
-                return this._direction == SortDirection.Asc ? compare : compare * -1;
-            });
-
-            return tmpList.GetRange(0, this._pageSize > tmpList.Count ? tmpList.Count : this._pageSize);
-        }
-    }
-}

AuroraSignal/Src/Protos/signal.proto

@@ -54,7 +54,7 @@ service Signal {
 message Party {
     //The resource name of the party
     string name = 1;
-    string party_id = 2;
+    string id = 2;
     string display_name = 3;
     string description = 4;
     string host_ip = 5;
@@ -63,7 +63,7 @@ message Party {
 
 message PartyListItem {
     string name = 1;
-    string party_id = 2;
+    string id = 2;
 }
 
 message ListPartiesRequest {

AuroraSignal/Src/Services/Signal/SignalService.cs

@@ -4,6 +4,7 @@ using System.Linq;
 using System.Threading.Tasks;
 using Grpc.Core;
 using Microsoft.Extensions.Logging;
+using Aurora.Cursor;
 
 namespace Aurora.Services.Signal
 {

AuroraSignal/Src/Utils/HashUtil.cs

@@ -0,0 +1,25 @@
+using System.Security.Cryptography;
+using System.Text;
+using System;
+
+namespace Aurora.Utils
+{
+    public class HashUtil
+    {
+        public static Guid GetHash(string[] inputs)
+        {
+            string input = "";
+            foreach (string str in inputs)
+            {
+                input += str;
+            }
+
+            byte[] stringbytes = Encoding.UTF8.GetBytes(input);
+            byte[] hashedBytes = new System.Security.Cryptography
+                .SHA1CryptoServiceProvider()
+                .ComputeHash(stringbytes);
+            Array.Resize(ref hashedBytes, 16);
+            return new Guid(hashedBytes);
+        }
+    }
+}

workspace.code-workspace

@@ -7,6 +7,9 @@
 "settings": {
     "files.exclude": {
         "**/obj": true
-    }
+    },
+    "dotnet-test-explorer.testProjectPath": "./AuroraSignal.test",
+    "editor.formatOnSave": true,
+    "editor.defaultFormatter": "ms-dotnettools.csharp"
 }
 }