[BOUNTY] ssd timer (Goob-Station#6441)

* Create ssdindicator.ftl

* Update SSDIndicatorSystem.cs

* Update ssdindicator.ftl

* revert

* Create SSDTimerSystem.cs

* Apply suggestion from @NotActuallyMarty

---------

Co-authored-by: NotActuallyMarty <27968892+NotActuallyMarty@users.noreply.github.com>

Author: MartynDew

Content.Goobstation.Shared/SSDTimer/SSDTimerSystem.cs

@@ -0,0 +1,35 @@
+using Content.Shared.Examine;
+using Content.Shared.CCVar;
+using Content.Shared.SSDIndicator;
+using Robust.Shared.Timing;
+using Robust.Shared.Configuration;
+
+namespace Content.Goobstation.Shared.SSDTimer;
+
+public sealed class SSDTimerSystem : EntitySystem
+{
+    [Dependency] private readonly IConfigurationManager _cfg = default!;
+    [Dependency] private readonly IGameTiming _timing = default!;
+	
+	private float _icSsdSleepTime;
+
+    public override void Initialize()
+    {
+        base.Initialize();
+
+        SubscribeLocalEvent<SSDIndicatorComponent, ExaminedEvent>(OnExamined);
+		
+        _cfg.OnValueChanged(CCVars.ICSSDSleepTime, obj => _icSsdSleepTime = obj, true);
+
+    }
+	
+    private void OnExamined(EntityUid uid, SSDIndicatorComponent component, ExaminedEvent args)
+    {
+        if (!args.IsInDetailsRange || !component.IsSSD)
+            return;
+
+		var timeFellAsleep = component.FallAsleepTime - TimeSpan.FromSeconds(_icSsdSleepTime);
+		var time = _timing.CurTime - timeFellAsleep;
+		args.PushMarkup(Loc.GetString("comp-ssd-person-examined", ("ent", uid), ("time", (int) time.TotalMinutes)));
+    }
+}

Resources/Locale/en-US/_Goobstation/ssdindicator/ssdindicator.ftl

@@ -0,0 +1,4 @@
+comp-ssd-person-examined = [color=yellow]{ CAPITALIZE(SUBJECT($ent)) } has been asleep for { $time ->
+    [one] { $time } minute
+   *[other] { $time } minutes
+}.[/color]