Show remaining liquid in a drink when you examine it (#8721)

* Show drink volume on examine

* Approximate measurement unless a beaker

* Changed percentage threshold and added subjectivity

* Update default switch case since it can never be 0 here

* Remove int cast from PercentFull method

Content.Server/Chemistry/EntitySystems/SolutionContainerSystem.Capabilities.cs

@@ -113,6 +113,14 @@ public sealed partial class SolutionContainerSystem
             : solution.CurrentVolume;
     }
 
+    public float PercentFull(EntityUid uid)
+    {
+        if (!TryGetDrainableSolution(uid, out var solution) || solution.MaxVolume.Equals(FixedPoint2.Zero))
+            return 0;
+
+        return ((solution.CurrentVolume.Float() / solution.MaxVolume.Float()) * 100);
+    }
+
     public bool TryGetFitsInDispenser(EntityUid owner,
         [NotNullWhen(true)] out Solution? solution,
         FitsInDispenserComponent? dispenserFits = null,

Content.Server/Nutrition/EntitySystems/DrinkSystem.cs

@@ -74,6 +74,35 @@ namespace Content.Server.Nutrition.EntitySystems
             var openedText =
                 Loc.GetString(IsEmpty(uid, component) ? "drink-component-on-examine-is-empty" : "drink-component-on-examine-is-opened");
             args.Message.AddMarkup($"\n{Loc.GetString("drink-component-on-examine-details-text", ("colorName", color), ("text", openedText))}");
+            if (!IsEmpty(uid, component))
+            {
+                if (TryComp<ExaminableSolutionComponent>(component.Owner, out var comp))
+                {
+                    //provide exact measurement for beakers
+                    args.Message.AddMarkup($" - {Loc.GetString("drink-component-on-examine-exact-volume", ("amount", _solutionContainerSystem.DrainAvailable(uid)))}");
+                }
+                else
+                {
+                    //general approximation
+                    string remainingString;
+                    switch ((int)_solutionContainerSystem.PercentFull(uid))
+                    {
+                        case int perc when perc == 100:
+                            remainingString = "drink-component-on-examine-is-full";
+                            break;
+                        case int perc when perc > 66:
+                            remainingString = "drink-component-on-examine-is-mostly-full";
+                            break;
+                        case int perc when perc > 33:
+                            remainingString = HalfEmptyOrHalfFull(args);
+                            break;
+                        default:
+                            remainingString = "drink-component-on-examine-is-mostly-empty";
+                            break;
+                    }
+                    args.Message.AddMarkup($" - {Loc.GetString(remainingString)}");
+                }
+            }
         }
 
         private void SetOpen(EntityUid uid, bool opened = false, DrinkComponent? component = null)
@@ -353,5 +382,17 @@ namespace Content.Server.Nutrition.EntitySystems
 
             ev.Verbs.Add(verb);
         }
+
+        // some see half empty, and others see half full
+        private string HalfEmptyOrHalfFull(ExaminedEvent args)
+        {
+            string remainingString = "drink-component-on-examine-is-half-full";
+
+            if (TryComp<MetaDataComponent>(args.Examiner, out var examiner) && examiner.EntityName.Length > 0
+                && string.Compare(examiner.EntityName.Substring(0, 1), "m", StringComparison.InvariantCultureIgnoreCase) > 0)
+                remainingString = "drink-component-on-examine-is-half-empty";
+
+            return remainingString;
+        }
     }
 }

Resources/Locale/en-US/nutrition/components/drink-component.ftl

@@ -2,6 +2,12 @@ drink-component-on-use-is-empty = {$owner} is empty!
 drink-component-on-examine-is-empty = Empty
 drink-component-on-examine-is-opened = Opened
 drink-component-on-examine-details-text = [color={$colorName}]{$text}[/color]
+drink-component-on-examine-is-full = Full
+drink-component-on-examine-is-mostly-full = Mostly Full
+drink-component-on-examine-is-half-full = Halfway Full
+drink-component-on-examine-is-half-empty = Halfway Empty
+drink-component-on-examine-is-mostly-empty = Mostly Empty
+drink-component-on-examine-exact-volume = {$amount}u Full
 drink-component-try-use-drink-not-open = Open {$owner} first!
 drink-component-try-use-drink-is-empty = {$entity} is empty!
 drink-component-try-use-drink-cannot-drink = You can't drink anything!