Adds cow milking (#5293)

Content.Server/Animals/Components/UdderComponent.cs

@@ -0,0 +1,48 @@
+using System;
+using Content.Server.Animals.Systems;
+using Content.Shared.FixedPoint;
+using Robust.Shared.Analyzers;
+using Robust.Shared.GameObjects;
+using Robust.Shared.Serialization.Manager.Attributes;
+using Robust.Shared.ViewVariables;
+
+namespace Content.Server.Animals.Components
+{
+    [RegisterComponent, Friend(typeof(UdderSystem))]
+    internal class UdderComponent : Component
+    {
+        public override string Name => "Udder";
+
+        /// <summary>
+        ///     The reagent to produce.
+        /// </summary>
+        [ViewVariables(VVAccess.ReadOnly)]
+        [DataField("reagentId")]
+        public string ReagentId = "Milk";
+
+        /// <summary>
+        ///     The solution to add reagent to.
+        /// </summary>
+        [ViewVariables(VVAccess.ReadOnly)]
+        [DataField("targetSolution")]
+        public string TargetSolutionName = "udder";
+
+        /// <summary>
+        ///     The amount of reagent to be generated on update.
+        /// </summary>
+        [ViewVariables(VVAccess.ReadOnly)]
+        [DataField("quantity")]
+        public FixedPoint2 QuantityPerUpdate = 1;
+
+        /// <summary>
+        ///     The time between updates (in seconds).
+        /// </summary>
+        [ViewVariables(VVAccess.ReadOnly)]
+        [DataField("updateRate")]
+        public float UpdateRate = 5;
+
+        public float AccumulatedFrameTime;
+
+        public bool BeingMilked;
+    }
+}