Hud refactor (#7202)

Co-authored-by: DrSmugleaf <DrSmugleaf@users.noreply.github.com>
Co-authored-by: Jezithyr <jmaster9999@gmail.com>
Co-authored-by: Jezithyr <Jezithyr@gmail.com>
Co-authored-by: Visne <39844191+Visne@users.noreply.github.com>
Co-authored-by: wrexbe <wrexbe@protonmail.com>
Co-authored-by: wrexbe <81056464+wrexbe@users.noreply.github.com>

Content.Client/CharacterInfo/CharacterInfoSystem.cs

@@ -0,0 +1,58 @@
+using Content.Shared.CharacterInfo;
+using Content.Shared.Objectives;
+using Robust.Client.GameObjects;
+using Robust.Client.Player;
+
+namespace Content.Client.CharacterInfo;
+
+public sealed class CharacterInfoSystem : EntitySystem
+{
+    [Dependency] private readonly IPlayerManager _players = default!;
+
+    public event Action<CharacterData>? OnCharacterUpdate;
+    public event Action? OnCharacterDetached;
+
+    public override void Initialize()
+    {
+        base.Initialize();
+
+        SubscribeLocalEvent<PlayerAttachSysMessage>(OnPlayerAttached);
+
+        SubscribeNetworkEvent<CharacterInfoEvent>(OnCharacterInfoEvent);
+    }
+
+    public void RequestCharacterInfo()
+    {
+        var entity = _players.LocalPlayer?.ControlledEntity;
+        if (entity == null)
+        {
+            return;
+        }
+
+        RaiseNetworkEvent(new RequestCharacterInfoEvent(entity.Value));
+    }
+
+    private void OnPlayerAttached(PlayerAttachSysMessage msg)
+    {
+        if (msg.AttachedEntity == default)
+        {
+            OnCharacterDetached?.Invoke();
+        }
+    }
+
+    private void OnCharacterInfoEvent(CharacterInfoEvent msg, EntitySessionEventArgs args)
+    {
+        var sprite = CompOrNull<ISpriteComponent>(msg.EntityUid);
+        var data = new CharacterData(msg.JobTitle, msg.Objectives, msg.Briefing, sprite, Name(msg.EntityUid));
+
+        OnCharacterUpdate?.Invoke(data);
+    }
+
+    public readonly record struct CharacterData(
+        string Job,
+        Dictionary<string, List<ConditionInfo>> Objectives,
+        string Briefing,
+        ISpriteComponent? Sprite,
+        string EntityName
+    );
+}