Added pickaxe, asteroid rock and floors (#301)

Content.Server/GameObjects/Components/Mining/AsteroidRockComponent.cs

@@ -0,0 +1,46 @@
+using System;
+using System.Runtime.InteropServices;
+using Content.Server.GameObjects.Components.Sound;
+using Content.Server.GameObjects.Components.Weapon.Melee;
+using Content.Server.GameObjects.EntitySystems;
+using Content.Shared.GameObjects;
+using Robust.Server.GameObjects;
+using Robust.Shared.Audio;
+using Robust.Shared.GameObjects;
+using Robust.Shared.GameObjects.Components.Renderable;
+using Robust.Shared.Maths;
+using Robust.Shared.Utility;
+
+namespace Content.Server.GameObjects.Components.Mining
+{
+    [RegisterComponent]
+    public class AsteroidRockComponent : Component, IAttackBy
+    {
+        public override string Name => "AsteroidRock";
+        private static readonly string[] SpriteStates = {"0", "1", "2", "3", "4"};
+
+        public override void Initialize()
+        {
+            base.Initialize();
+            var spriteComponent = Owner.GetComponent<SpriteComponent>();
+            var random = new Random(Owner.Uid.GetHashCode() ^ DateTime.Now.GetHashCode());
+            spriteComponent.LayerSetState(0, random.Pick(SpriteStates));
+        }
+
+        bool IAttackBy.AttackBy(AttackByEventArgs eventArgs)
+        {
+            var item = eventArgs.AttackWith;
+            if (!item.TryGetComponent(out MeleeWeaponComponent meleeWeaponComponent)) return false;
+
+            Owner.GetComponent<DamageableComponent>().TakeDamage(DamageType.Brute, meleeWeaponComponent.Damage);
+
+            if (!item.TryGetComponent(out PickaxeComponent pickaxeComponent)) return true;
+            if (!string.IsNullOrWhiteSpace(pickaxeComponent.MiningSound) &&
+                item.TryGetComponent<SoundComponent>(out var soundComponent))
+            {
+                soundComponent.Play(pickaxeComponent.MiningSound, AudioParams.Default);
+            }
+            return true;
+        }
+    }
+}