Adds Basic Tools (#27)

* Basic Tools

* Adds tool prototypes

Content.Server/GameObjects/Components/Interactable/Tools/WelderComponent.cs

@@ -0,0 +1,129 @@
+using System;
+using SS14.Shared.Interfaces.GameObjects;
+using SS14.Shared.Utility;
+using YamlDotNet.RepresentationModel;
+using SS14.Server.GameObjects;
+
+namespace Content.Server.GameObjects.Components.Interactable.Tools
+{
+    /// <summary>
+    /// Tool used to weld metal together, light things on fire, or melt into constituent parts
+    /// </summary>
+    class WelderComponent : ToolComponent, EntitySystems.IUse
+    {
+        public override string Name => "Welder";
+
+        /// <summary>
+        /// Maximum fuel capacity the welder can hold
+        /// </summary>
+        public float FuelCapacity { get; set; } = 50;
+
+        /// <summary>
+        /// Fuel the welder has to do tasks
+        /// </summary>
+        public float Fuel { get; set; } = 0;
+
+        /// <summary>
+        /// Default Cost of using the welder fuel for an action
+        /// </summary>
+        public const float DefaultFuelCost = 5;
+
+        /// <summary>
+        /// Rate at which we expunge fuel from ourselves when activated
+        /// </summary>
+        public const float FuelLossRate = 0.2f;
+
+        /// <summary>
+        /// Status of welder, whether it is ignited
+        /// </summary>
+        public bool Activated { get; private set; } = false;
+
+        //private string OnSprite { get; set; }
+        //private string OffSprite { get; set; }
+
+        public override void LoadParameters(YamlMappingNode mapping)
+        {
+            base.LoadParameters(mapping);
+
+            if (mapping.TryGetNode("Capacity", out YamlNode node))
+            {
+                FuelCapacity = node.AsFloat();
+            }
+
+            //if (mapping.TryGetNode("On", out node))
+            //{
+            //    OnSprite = node.AsString();
+            //}
+
+            //if (mapping.TryGetNode("Off", out node))
+            //{
+            //    OffSprite = node.AsString();
+            //}
+
+            if (mapping.TryGetNode("Fuel", out node))
+            {
+                Fuel = node.AsFloat();
+            }
+            else
+            {
+                Fuel = FuelCapacity;
+            }
+        }
+
+        public override void Update(float frameTime)
+        {
+            Fuel = Math.Min(Fuel - FuelLossRate, 0);
+
+            if(Activated && Fuel == 0)
+            {
+                ToggleStatus();
+            }
+        }
+
+        public bool CanUse(float value)
+        {
+            return Fuel > value;
+        }
+
+        public override bool CanUse()
+        {
+            return CanUse(DefaultFuelCost);
+        }
+
+        public bool CanActivate()
+        {
+            return Fuel > 0;
+        }
+
+        public bool UseEntity(IEntity user)
+        {
+            return ToggleStatus();
+        }
+
+        /// <summary>
+        /// Deactivates welding tool if active, activates welding tool if possible
+        /// </summary>
+        /// <returns></returns>
+        public bool ToggleStatus()
+        {
+            if(Activated)
+            {
+                Activated = false;
+
+                //TODO : Change sprite on deactivation
+                return true;
+            }
+            else if(CanActivate())
+            {
+                Activated = true;
+
+                //TODO : Change sprite on activation
+                return true;
+            }
+            else
+            {
+                return false;
+            }
+        }
+    }
+}