Add ItemStatus to energy weapons (#1921)

* -ItemStatus for BatteryGuns
-EjectCell Verb
-Using the gun throws the battery also on the ground

* Copy the flashlight and call it a day

* Name a red fruit

* Remove SoundGunshot

Content.Client/GameObjects/Components/Weapons/Ranged/Barrels/ClientBatteryBarrelComponent.cs

@@ -0,0 +1,160 @@
+using Content.Client.UserInterface.Stylesheets;
+using Content.Shared.GameObjects;
+using Content.Shared.GameObjects.Components.Weapons.Ranged.Barrels;
+using Robust.Client.Graphics.Drawing;
+using Robust.Client.UserInterface;
+using Robust.Client.UserInterface.Controls;
+using Robust.Shared.GameObjects;
+using Robust.Shared.Maths;
+using Robust.Shared.ViewVariables;
+using System;
+
+namespace Content.Client.GameObjects.Components.Weapons.Ranged.Barrels
+{
+    [RegisterComponent]
+    public class ClientBatteryBarrelComponent : Component, IItemStatus
+    {
+        public override string Name => "BatteryBarrel";
+        public override uint? NetID => ContentNetIDs.BATTERY_BARREL;
+
+        private StatusControl _statusControl;
+
+        /// <summary>
+        ///     Count of bullets in the magazine.
+        /// </summary>
+        /// <remarks>
+        ///     Null if no magazine is inserted.
+        /// </remarks>
+        [ViewVariables]
+        public (int count, int max)? MagazineCount { get; private set; }
+
+        public override void HandleComponentState(ComponentState curState, ComponentState nextState)
+        {
+            if (!(curState is BatteryBarrelComponentState cast))
+                return;
+
+            MagazineCount = cast.Magazine;
+            _statusControl?.Update();
+        }
+
+        public Control MakeControl()
+        {
+            _statusControl = new StatusControl(this);
+            _statusControl.Update();
+            return _statusControl;
+        }
+
+        public void DestroyControl(Control control)
+        {
+            if (_statusControl == control)
+            {
+                _statusControl = null;
+            }
+        }
+
+        private sealed class StatusControl : Control
+        {
+            private readonly ClientBatteryBarrelComponent _parent;
+            private readonly HBoxContainer _bulletsList;
+            private readonly Label _noBatteryLabel;
+            private readonly Label _ammoCount;
+
+            public StatusControl(ClientBatteryBarrelComponent parent)
+            {
+                _parent = parent;
+                SizeFlagsHorizontal = SizeFlags.FillExpand;
+                SizeFlagsVertical = SizeFlags.ShrinkCenter;
+
+                AddChild(new HBoxContainer
+                {
+                    SizeFlagsHorizontal = SizeFlags.FillExpand,
+                    Children =
+                    {
+                        new Control
+                        {
+                            SizeFlagsHorizontal = SizeFlags.FillExpand,
+                            Children =
+                            {
+                                (_bulletsList = new HBoxContainer
+                                {
+                                    SizeFlagsVertical = SizeFlags.ShrinkCenter,
+                                    SeparationOverride = 4
+                                }),
+                                (_noBatteryLabel = new Label
+                                {
+                                    Text = "No Battery!",
+                                    StyleClasses = {StyleNano.StyleClassItemStatus}
+                                })
+                            }
+                        },
+                        new Control() { CustomMinimumSize = (5,0) },
+                        (_ammoCount = new Label
+                        {
+                            StyleClasses = {StyleNano.StyleClassItemStatus},
+                            SizeFlagsHorizontal = SizeFlags.ShrinkEnd,
+                        }),
+                    }
+                });
+            }
+
+            public void Update()
+            {
+                _bulletsList.RemoveAllChildren();
+
+                if (_parent.MagazineCount == null)
+                {
+                    _noBatteryLabel.Visible = true;
+                    _ammoCount.Visible = false;
+                    return;
+                }
+
+                var (count, capacity) = _parent.MagazineCount.Value;
+
+                _noBatteryLabel.Visible = false;
+                _ammoCount.Visible = true;
+
+                _ammoCount.Text = $"x{count:00}";
+                capacity = Math.Min(capacity, 8);
+                FillBulletRow(_bulletsList, count, capacity);
+            }
+
+            private static void FillBulletRow(Control container, int count, int capacity)
+            {
+                var colorGone = Color.FromHex("#000000");
+                var color = Color.FromHex("#E00000");
+
+                // Draw the empty ones
+                for (var i = count; i < capacity; i++)
+                {
+                    container.AddChild(new PanelContainer
+                    {
+                        PanelOverride = new StyleBoxFlat()
+                        {
+                            BackgroundColor = colorGone,
+                        },
+                        CustomMinimumSize = (10, 15),
+                    });
+                }
+
+                // Draw the full ones, but limit the count to the capacity
+                count = Math.Min(count, capacity);
+                for (var i = 0; i < count; i++)
+                {
+                    container.AddChild(new PanelContainer
+                    {
+                        PanelOverride = new StyleBoxFlat()
+                        {
+                            BackgroundColor = color,
+                        },
+                        CustomMinimumSize = (10, 15),
+                    });
+                }
+            }
+
+            protected override Vector2 CalculateMinimumSize()
+            {
+                return Vector2.ComponentMax((0, 15), base.CalculateMinimumSize());
+            }
+        }
+    }
+}