Re-organize all projects (#4166)

Content.Shared/Interaction/IInteractUsing.cs

@@ -0,0 +1,81 @@
+using System;
+using System.Threading.Tasks;
+using JetBrains.Annotations;
+using Robust.Shared.Analyzers;
+using Robust.Shared.GameObjects;
+using Robust.Shared.Map;
+
+namespace Content.Shared.Interaction
+{
+    /// <summary>
+    /// This interface gives components behavior when their entity is clicked on by a user with an object in their hand
+    /// who is in range and has unobstructed reach of the target entity (allows inside blockers). This includes
+    /// clicking on an object in the world as well as clicking on an object in inventory.
+    /// </summary>
+    [RequiresExplicitImplementation]
+    public interface IInteractUsing
+    {
+        /// <summary>
+        /// The interaction priority. Higher numbers get called first.
+        /// </summary>
+        /// <value>Priority defaults to 0</value>
+        int Priority => 0;
+
+        /// <summary>
+        /// Called when using one object on another when user is in range of the target entity.
+        /// </summary>
+        [Obsolete("Use InteractUsingMessage instead")]
+        Task<bool> InteractUsing(InteractUsingEventArgs eventArgs);
+    }
+
+    public class InteractUsingEventArgs : EventArgs, ITargetedInteractEventArgs
+    {
+        public InteractUsingEventArgs(IEntity user, EntityCoordinates clickLocation, IEntity @using, IEntity target)
+        {
+            User = user;
+            ClickLocation = clickLocation;
+            Using = @using;
+            Target = target;
+        }
+
+        public IEntity User { get; }
+        public EntityCoordinates ClickLocation { get; }
+        public IEntity Using { get; }
+        public IEntity Target { get; }
+    }
+
+    /// <summary>
+    ///     Raised when a target entity is interacted with by a user while holding an object in their hand.
+    /// </summary>
+    [PublicAPI]
+    public class InteractUsingEvent : HandledEntityEventArgs
+    {
+        /// <summary>
+        ///     Entity that triggered the interaction.
+        /// </summary>
+        public IEntity User { get; }
+
+        /// <summary>
+        ///     Entity that the user used to interact.
+        /// </summary>
+        public IEntity Used { get; }
+
+        /// <summary>
+        ///     Entity that was interacted on.
+        /// </summary>
+        public IEntity Target { get; }
+
+        /// <summary>
+        ///     The original location that was clicked by the user.
+        /// </summary>
+        public EntityCoordinates ClickLocation { get; }
+
+        public InteractUsingEvent(IEntity user, IEntity used, IEntity target, EntityCoordinates clickLocation)
+        {
+            User = user;
+            Used = used;
+            Target = target;
+            ClickLocation = clickLocation;
+        }
+    }
+}