3 files changed, 104 insertions, 0 deletions
diff --git a/Ryujinx.HLE/HOS/Services/Sdb/Pdm/QueryService/QueryPlayStatisticsManager.cs b/Ryujinx.HLE/HOS/Services/Sdb/Pdm/QueryService/QueryPlayStatisticsManager.cs
new file mode 100644
index 00000000..b3646925
--- /dev/null
+++ b/Ryujinx.HLE/HOS/Services/Sdb/Pdm/QueryService/QueryPlayStatisticsManager.cs
@@ -0,0 +1,83 @@
+using ARMeilleure.Memory;
+using Ryujinx.HLE.HOS.Services.Sdb.Pdm.QueryService.Types;
+using Ryujinx.HLE.Utilities;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.HLE.HOS.Services.Sdb.Pdm.QueryService
+{
+    static class QueryPlayStatisticsManager
+    {
+        private static Dictionary<UInt128, ApplicationPlayStatistics> applicationPlayStatistics = new Dictionary<UInt128, ApplicationPlayStatistics>();
+
+        internal static ResultCode GetPlayStatistics(ServiceCtx context, bool byUserId = false)
+        {
+            long inputPosition = context.Request.SendBuff[0].Position;
+            long inputSize     = context.Request.SendBuff[0].Size;
+
+            long outputPosition = context.Request.ReceiveBuff[0].Position;
+            long outputSize     = context.Request.ReceiveBuff[0].Size;
+
+            UInt128 userId = byUserId ? new UInt128(context.RequestData.ReadBytes(0x10)) : new UInt128();
+
+            if (byUserId)
+            {
+                if (!context.Device.System.State.Account.TryGetUser(userId, out _))
+                {
+                    return ResultCode.UserNotFound;
+                }
+            }
+
+            PlayLogQueryCapability queryCapability = (PlayLogQueryCapability)context.Device.System.ControlData.PlayLogQueryCapability;
+
+            List<ulong> titleIds = new List<ulong>();
+
+            for (int i = 0; i < inputSize / sizeof(ulong); i++)
+            {
+                titleIds.Add(BitConverter.ToUInt64(context.Memory.ReadBytes(inputPosition, inputSize), 0));
+            }
+
+            if (queryCapability == PlayLogQueryCapability.WhiteList)
+            {
+                // Check if input title ids are in the whitelist.
+                foreach (ulong titleId in titleIds)
+                {
+                    if (!context.Device.System.ControlData.PlayLogQueryableApplicationId.Contains(titleId))
+                    {
+                        return (ResultCode)Am.ResultCode.ObjectInvalid;
+                    }
+                }
+            }
+
+            MemoryHelper.FillWithZeros(context.Memory, outputPosition, (int)outputSize);
+
+            // Return ResultCode.ServiceUnavailable if data is locked by another process.
+            var filteredApplicationPlayStatistics = applicationPlayStatistics.AsEnumerable();
+
+            if (queryCapability == PlayLogQueryCapability.None)
+            {
+                filteredApplicationPlayStatistics = filteredApplicationPlayStatistics.Where(kv => kv.Value.TitleId == context.Process.TitleId);
+            }
+            else // PlayLogQueryCapability.All
+            {
+                filteredApplicationPlayStatistics = filteredApplicationPlayStatistics.Where(kv => titleIds.Contains(kv.Value.TitleId));
+            }
+
+            if (byUserId)
+            {
+                filteredApplicationPlayStatistics = filteredApplicationPlayStatistics.Where(kv => kv.Key == userId);
+            }
+
+            for (int i = 0; i < filteredApplicationPlayStatistics.Count(); i++)
+            {
+                MemoryHelper.Write(context.Memory, outputPosition + (i * Marshal.SizeOf<ApplicationPlayStatistics>()), filteredApplicationPlayStatistics.ElementAt(i).Value);
+            }
+
+            context.ResponseData.Write(filteredApplicationPlayStatistics.Count());
+
+            return ResultCode.Success;
+        }
+    }
+}
+\ No newline at end of file
diff --git a/Ryujinx.HLE/HOS/Services/Sdb/Pdm/QueryService/Types/ApplicationPlayStatistics.cs b/Ryujinx.HLE/HOS/Services/Sdb/Pdm/QueryService/Types/ApplicationPlayStatistics.cs
new file mode 100644
index 00000000..c28d757e
--- /dev/null
+++ b/Ryujinx.HLE/HOS/Services/Sdb/Pdm/QueryService/Types/ApplicationPlayStatistics.cs
@@ -0,0 +1,12 @@
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.HLE.HOS.Services.Sdb.Pdm.QueryService.Types
+{
+    [StructLayout(LayoutKind.Sequential, Size = 0x18)]
+    struct ApplicationPlayStatistics
+    {
+        public ulong TitleId;
+        public long  TotalPlayTime; // In nanoseconds.
+        public long  TotalLaunchCount;
+    }
+}
+\ No newline at end of file
diff --git a/Ryujinx.HLE/HOS/Services/Sdb/Pdm/QueryService/Types/PlayLogQueryCapability.cs b/Ryujinx.HLE/HOS/Services/Sdb/Pdm/QueryService/Types/PlayLogQueryCapability.cs
new file mode 100644
index 00000000..9e4b85de
--- /dev/null
+++ b/Ryujinx.HLE/HOS/Services/Sdb/Pdm/QueryService/Types/PlayLogQueryCapability.cs
@@ -0,0 +1,9 @@
+namespace Ryujinx.HLE.HOS.Services.Sdb.Pdm.QueryService.Types
+{
+    enum PlayLogQueryCapability
+    {
+        None,
+        WhiteList,
+        All
+    }
+}
+\ No newline at end of file