Add FileTimestamp property to RemoteStorage.File.

Facepunch.Steamworks.Test/Client/RemoteStorageTest.cs

@@ -78,7 +78,8 @@ namespace Facepunch.Steamworks.Test
 
                 foreach ( var file in client.RemoteStorage.Files )
                 {
-                    Console.WriteLine( $"- {file.FileName} ({file.SizeInBytes} bytes)" );
+                    DateTime t = new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc).AddSeconds(file.FileTimestamp);
+                    Console.WriteLine( $"- {file.FileName} ({file.SizeInBytes} bytes), modified {t:O}" );
                 }
             }
         }

Facepunch.Steamworks/Client/RemoteStorage.File.cs

@@ -19,6 +19,7 @@ namespace Facepunch.Steamworks
         private readonly bool _isUgc;
         private string _fileName;
         private int _sizeInBytes = -1;
+        private long _timestamp = 0;
         private UGCHandle_t _handle;
         private ulong _ownerId;
 
@@ -84,6 +85,21 @@ namespace Facepunch.Steamworks
             internal set { _sizeInBytes = value; }
         }
 
+        /// <summary>
+        /// Date modified timestamp in epoch format.
+        /// </summary>
+        public long FileTimestamp
+        {
+            get
+            {
+                if ( _timestamp != 0 ) return _timestamp;
+                if (_isUgc) throw new NotImplementedException();
+                _timestamp = remoteStorage.native.GetFileTimestamp(FileName);
+                return _timestamp;
+            }
+            internal set { _timestamp = value; }
+        }
+
         internal RemoteFile( RemoteStorage r, UGCHandle_t handle )
         {
             Exists = true;
@@ -94,7 +110,7 @@ namespace Facepunch.Steamworks
             _handle = handle;
         }
 
-        internal RemoteFile( RemoteStorage r, string name, ulong ownerId, int sizeInBytes = -1 )
+        internal RemoteFile( RemoteStorage r, string name, ulong ownerId, int sizeInBytes = -1, long timestamp = 0 )
         {
             remoteStorage = r;
 
@@ -102,6 +118,7 @@ namespace Facepunch.Steamworks
             _fileName = name;
             _ownerId = ownerId;
             _sizeInBytes = sizeInBytes;
+            _timestamp = timestamp;
         }
 
         /// <summary>

Facepunch.Steamworks/Client/RemoteStorage.cs

@@ -177,16 +177,18 @@ namespace Facepunch.Steamworks
             {
                 int size;
                 var name = NormalizePath( native.GetFileNameAndSize( i, out size ) );
+                var timestamp = native.GetFileTimestamp(name);
 
                 var existing = _files.FirstOrDefault( x => x.FileName == name );
                 if ( existing == null )
                 {
-                    existing = new RemoteFile( this, name, client.SteamId, size );
+                    existing = new RemoteFile( this, name, client.SteamId, size, timestamp );
                     _files.Add( existing );
                 }
                 else
                 {
                     existing.SizeInBytes = size;
+                    existing.FileTimestamp = timestamp;
                 }
 
                 existing.Exists = true;