Re-organize all projects (#4166)

Content.Server/Inventory/Components/IInventoryController.cs

@@ -0,0 +1,28 @@
+using System.Diagnostics.CodeAnalysis;
+using Robust.Shared.GameObjects;
+using static Content.Shared.Inventory.EquipmentSlotDefines;
+
+namespace Content.Server.Inventory.Components
+{
+    /// <summary>
+    ///     Allows for overriding inventory-related behavior on an entity.
+    /// </summary>
+    public interface IInventoryController
+    {
+        /// <summary>
+        ///     Can be implemented to override "can this item be equipped" behavior.
+        /// </summary>
+        /// <param name="slot">The slot to be equipped into.</param>
+        /// <param name="entity">The entity to equip.</param>
+        /// <param name="flagsCheck">Whether the entity passes default slot masks & flags checks.</param>
+        /// <param name="reason">The translated reason why the item cannot be equiped, if this function returns false. Can be null.</param>
+        /// <returns>True if the entity can be equipped, false otherwise</returns>
+        bool CanEquip(Slots slot, IEntity entity, bool flagsCheck, [NotNullWhen(false)] out string? reason)
+        {
+            reason = null;
+            return flagsCheck;
+        }
+
+        bool CanEquip(Slots slot, IEntity entity, bool flagsCheck) => CanEquip(slot, entity, flagsCheck, out _);
+    }
+}