[issue #139] client lookup and stats api

Plugins/Stats/Dtos/StatsInfoRequest.cs

@@ -0,0 +1,10 @@
+namespace Stats.Dtos
+{
+    public class StatsInfoRequest
+    {
+        /// <summary>
+        /// client identifier
+        /// </summary>
+        public int? ClientId { get; set; }
+    }
+}

Plugins/Stats/Dtos/StatsInfoResult.cs

@@ -0,0 +1,56 @@
+using System;
+using System.Text.Json.Serialization;
+
+namespace Stats.Dtos
+{
+    public class StatsInfoResult
+    {
+        /// <summary>
+        /// ranking on the server
+        /// </summary>
+        public int Ranking { get; set; }
+
+        /// <summary>
+        /// number of kills
+        /// </summary>
+        public int Kills { get; set; }
+
+        /// <summary>
+        /// number of deaths
+        /// </summary>
+        public int Deaths { get; set; }
+
+        /// <summary>
+        /// performance level (elo rating + skill) / 2
+        /// </summary>
+        public double Performance { get; set; }
+        
+        /// <summary>
+        /// SPM
+        /// </summary>
+        public double ScorePerMinute { get; set; }
+
+        /// <summary>
+        /// last connection
+        /// </summary>
+        public DateTime LastPlayed { get; set; }
+
+        /// <summary>
+        /// how many seconds played on the server
+        /// </summary>
+        public double TotalSecondsPlayed { get; set; }
+
+        /// <summary>
+        /// name of the server
+        /// </summary>
+        public string ServerName { get; set; }
+
+        /// <summary>
+        /// server game
+        /// </summary>
+        public string ServerGame { get; set; }
+
+        [JsonIgnore]
+        public long ServerId { get; set; }
+    }
+}

Plugins/Stats/Helpers/StatsResourceQueryHelper.cs

@@ -0,0 +1,75 @@
+using IW4MAdmin.Plugins.Stats.Models;
+using Microsoft.EntityFrameworkCore;
+using SharedLibraryCore.Helpers;
+using SharedLibraryCore.Interfaces;
+using Stats.Dtos;
+using System;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace Stats.Helpers
+{
+    /// <summary>
+    /// implementation for IResourceQueryHelper
+    /// used to obtain client statistics information
+    /// </summary>
+    public class StatsResourceQueryHelper : IResourceQueryHelper<StatsInfoRequest, StatsInfoResult>
+    {
+        private readonly IDatabaseContextFactory _contextFactory;
+
+        public StatsResourceQueryHelper(IDatabaseContextFactory databaseContextFactory)
+        {
+            _contextFactory = databaseContextFactory;
+        }
+
+        /// <inheritdoc/>
+        public async Task<ResourceQueryHelperResult<StatsInfoResult>> QueryResource(StatsInfoRequest query)
+        {
+            var result = new ResourceQueryHelperResult<StatsInfoResult>();
+            using var context = _contextFactory.CreateContext(enableTracking: false);
+
+            // we need to get the ratings separately because there's not explicit FK
+            var ratings = await context.Set<EFClientRatingHistory>()
+                .Where(_ratingHistory => _ratingHistory.ClientId == query.ClientId)
+                .SelectMany(_ratingHistory => _ratingHistory.Ratings.Where(_rating => _rating.ServerId != null && _rating.Newest)
+                .Select(_rating => new
+                {
+                    _rating.ServerId,
+                    _rating.Ranking,
+                    _rating.When
+                }))
+                .ToListAsync();
+
+            var iqStats = context.Set<EFClientStatistics>()
+                .Where(_stats => _stats.ClientId == query.ClientId)
+                .Select(_stats => new StatsInfoResult
+                {
+                    ServerId = _stats.ServerId,
+                    Kills = _stats.Kills,
+                    Deaths = _stats.Deaths,
+                    Performance = Math.Round((_stats.EloRating + _stats.Skill) / 2.0, 2),
+                    ScorePerMinute = _stats.SPM,
+                    LastPlayed = _stats.Client.LastConnection,
+                    TotalSecondsPlayed = _stats.TimePlayed,
+                    ServerGame = _stats.Server.GameName.ToString(),
+                    ServerName = _stats.Server.HostName,
+                });
+
+            var queryResults = await iqStats.ToListAsync();
+
+            // add the rating query's results to the full query
+            foreach(var eachResult in queryResults)
+            {
+                var rating = ratings.FirstOrDefault(_rating => _rating.ServerId == eachResult.ServerId);
+                eachResult.Ranking = rating?.Ranking ?? 0;
+                eachResult.LastPlayed = rating?.When ?? eachResult.LastPlayed;
+            }
+
+            result.Results = queryResults;
+            result.RetrievedResultCount = queryResults.Count;
+            result.TotalResultCount = result.RetrievedResultCount;
+
+            return result;
+        }
+    }
+}

Plugins/Stats/Stats.csproj

@@ -12,11 +12,11 @@
     <Description>Client Statistics Plugin for IW4MAdmin</Description>
     <Copyright>2018</Copyright>
     <Configurations>Debug;Release;Prerelease</Configurations>
-    <LangVersion>7.1</LangVersion>
+    <LangVersion>8.0</LangVersion>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="RaidMax.IW4MAdmin.SharedLibraryCore" Version="2.2.12" PrivateAssets="All" />
+    <PackageReference Include="RaidMax.IW4MAdmin.SharedLibraryCore" Version="2.4.2" PrivateAssets="All" />
   </ItemGroup>
 
   <Target Name="PostBuild" AfterTargets="PostBuildEvent">