Add sorting the admin player panel by clicking the headers (#7150)

Content.Client/Administration/UI/Tabs/PlayerTab/PlayerTab.xaml.cs

@@ -1,6 +1,3 @@
-using System;
-using System.Collections.Generic;
-using Content.Client.Administration.UI.CustomControls;
 using Content.Shared.Administration;
 using Robust.Client.AutoGenerated;
 using Robust.Client.Graphics;
@@ -8,16 +5,22 @@ using Robust.Client.Player;
 using Robust.Client.UserInterface;
 using Robust.Client.UserInterface.Controls;
 using Robust.Client.UserInterface.XAML;
-using Robust.Shared.GameObjects;
-using Robust.Shared.IoC;
-using Robust.Shared.Maths;
+using static Content.Client.Administration.UI.Tabs.PlayerTab.PlayerTabHeader;
 
 namespace Content.Client.Administration.UI.Tabs.PlayerTab
 {
     [GenerateTypedNameReferences]
     public sealed partial class PlayerTab : Control
     {
+        private const string ArrowUp = "↑";
+        private const string ArrowDown = "↓";
+        private readonly Color _altColor = Color.FromHex("#292B38");
+        private readonly Color _defaultColor = Color.FromHex("#2F2F3B");
         private readonly AdminSystem _adminSystem;
+        private readonly List<PlayerTabEntry> _players = new();
+
+        private Header _headerClicked = Header.Username;
+        private bool _ascending = true;
 
         public event Action<BaseButton.ButtonEventArgs>? OnEntryPressed;
 
@@ -29,6 +32,9 @@ namespace Content.Client.Administration.UI.Tabs.PlayerTab
             _adminSystem.PlayerListChanged += RefreshPlayerList;
             OverlayButtonOn.OnPressed += _adminSystem.AdminOverlayOn;
             OverlayButtonOff.OnPressed += _adminSystem.AdminOverlayOff;
+
+            ListHeader.BackgroundColorPanel.PanelOverride = new StyleBoxFlat(_altColor);
+            ListHeader.OnHeaderClicked += HeaderClicked;
         }
 
         protected override void Dispose(bool disposing)
@@ -42,24 +48,20 @@ namespace Content.Client.Administration.UI.Tabs.PlayerTab
 
         private void RefreshPlayerList(IReadOnlyList<PlayerInfo> players)
         {
-            PlayerList.RemoveAllChildren();
+            foreach (var control in _players)
+            {
+                PlayerList.RemoveChild(control);
+            }
+
+            _players.Clear();
+
             var playerManager = IoCManager.Resolve<IPlayerManager>();
             PlayerCount.Text = $"Players: {playerManager.PlayerCount}";
 
-            var altColor = Color.FromHex("#292B38");
-            var defaultColor = Color.FromHex("#2F2F3B");
-
-            PlayerList.AddChild(new PlayerTabEntry("Username",
-                "Character",
-                "Job",
-                "Antagonist",
-                new StyleBoxFlat(altColor),
-                true));
-            PlayerList.AddChild(new HSeparator());
-
-            // Temporary until we can sort by <whatever>
             var sortedPlayers = new List<PlayerInfo>(players);
-            sortedPlayers.Sort((x, y) => string.Compare(x.Username, y.Username, StringComparison.Ordinal));
+            sortedPlayers.Sort(Compare);
+
+            UpdateHeaderSymbols();
 
             var useAltColor = false;
             foreach (var player in sortedPlayers)
@@ -68,14 +70,58 @@ namespace Content.Client.Administration.UI.Tabs.PlayerTab
                     player.CharacterName,
                     player.StartingJob,
                     player.Antag ? "YES" : "NO",
-                    new StyleBoxFlat(useAltColor ? altColor : defaultColor),
+                    new StyleBoxFlat(useAltColor ? _altColor : _defaultColor),
                     player.Connected);
                 entry.PlayerUid = player.EntityUid;
                 entry.OnPressed += args => OnEntryPressed?.Invoke(args);
                 PlayerList.AddChild(entry);
+                _players.Add(entry);
 
                 useAltColor ^= true;
             }
         }
+
+        private void UpdateHeaderSymbols()
+        {
+            ListHeader.ResetHeaderText();
+            ListHeader.GetHeader(_headerClicked).Text += $" {(_ascending ? ArrowUp : ArrowDown)}";
+        }
+
+        private int Compare(PlayerInfo x, PlayerInfo y)
+        {
+            if (!_ascending)
+            {
+                (x, y) = (y, x);
+            }
+
+            return _headerClicked switch
+            {
+                Header.Username => Compare(x.Username, y.Username),
+                Header.Character => Compare(x.CharacterName, y.CharacterName),
+                Header.Job => Compare(x.StartingJob, y.StartingJob),
+                Header.Antagonist => x.Antag.CompareTo(y.Antag),
+                _ => 1
+            };
+        }
+
+        private int Compare(string x, string y)
+        {
+            return string.Compare(x, y, StringComparison.OrdinalIgnoreCase);
+        }
+
+        private void HeaderClicked(Header header)
+        {
+            if (_headerClicked == header)
+            {
+                _ascending = !_ascending;
+            }
+            else
+            {
+                _headerClicked = header;
+                _ascending = true;
+            }
+
+            RefreshPlayerList(_adminSystem.PlayerList);
+        }
     }
 }