3 files changed, 121 insertions, 0 deletions
diff --git a/MediaBrowser.Controller/Collections/CollectionCreationOptions.cs b/MediaBrowser.Controller/Collections/CollectionCreationOptions.cs
new file mode 100644
index 000000000..727b487a7
--- /dev/null
+++ b/MediaBrowser.Controller/Collections/CollectionCreationOptions.cs
@@ -0,0 +1,27 @@
+using MediaBrowser.Model.Entities;
+using System;
+using System.Collections.Generic;
+
+namespace MediaBrowser.Controller.Collections
+{
+    public class CollectionCreationOptions : IHasProviderIds
+    {
+        public string Name { get; set; }
+
+        public Guid? ParentId { get; set; }
+
+        public bool IsLocked { get; set; }
+
+        public Dictionary<string, string> ProviderIds { get; set; }
+
+        public string[] ItemIdList { get; set; }
+        public Guid[] UserIds { get; set; }
+
+        public CollectionCreationOptions()
+        {
+            ProviderIds = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
+            ItemIdList = new string[] {};
+            UserIds = new Guid[] {};
+        }
+    }
+}
diff --git a/MediaBrowser.Controller/Collections/CollectionEvents.cs b/MediaBrowser.Controller/Collections/CollectionEvents.cs
new file mode 100644
index 000000000..80f66a444
--- /dev/null
+++ b/MediaBrowser.Controller/Collections/CollectionEvents.cs
@@ -0,0 +1,37 @@
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Controller.Entities.Movies;
+using System;
+using System.Collections.Generic;
+
+namespace MediaBrowser.Controller.Collections
+{
+    public class CollectionCreatedEventArgs : EventArgs
+    {
+        /// <summary>
+        /// Gets or sets the collection.
+        /// </summary>
+        /// <value>The collection.</value>
+        public BoxSet Collection { get; set; }
+
+        /// <summary>
+        /// Gets or sets the options.
+        /// </summary>
+        /// <value>The options.</value>
+        public CollectionCreationOptions Options { get; set; }
+    }
+
+    public class CollectionModifiedEventArgs : EventArgs
+    {
+        /// <summary>
+        /// Gets or sets the collection.
+        /// </summary>
+        /// <value>The collection.</value>
+        public BoxSet Collection { get; set; }
+
+        /// <summary>
+        /// Gets or sets the items changed.
+        /// </summary>
+        /// <value>The items changed.</value>
+        public List<BaseItem> ItemsChanged { get; set; }
+    }
+}
diff --git a/MediaBrowser.Controller/Collections/ICollectionManager.cs b/MediaBrowser.Controller/Collections/ICollectionManager.cs
new file mode 100644
index 000000000..05bc927ba
--- /dev/null
+++ b/MediaBrowser.Controller/Collections/ICollectionManager.cs
@@ -0,0 +1,57 @@
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Controller.Entities.Movies;
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+
+namespace MediaBrowser.Controller.Collections
+{
+    public interface ICollectionManager
+    {
+        /// <summary>
+        /// Occurs when [collection created].
+        /// </summary>
+        event EventHandler<CollectionCreatedEventArgs> CollectionCreated;
+
+        /// <summary>
+        /// Occurs when [items added to collection].
+        /// </summary>
+        event EventHandler<CollectionModifiedEventArgs> ItemsAddedToCollection;
+
+        /// <summary>
+        /// Occurs when [items removed from collection].
+        /// </summary>
+        event EventHandler<CollectionModifiedEventArgs> ItemsRemovedFromCollection;
+
+        /// <summary>
+        /// Creates the collection.
+        /// </summary>
+        /// <param name="options">The options.</param>
+        BoxSet CreateCollection(CollectionCreationOptions options);
+
+        /// <summary>
+        /// Adds to collection.
+        /// </summary>
+        /// <param name="collectionId">The collection identifier.</param>
+        /// <param name="itemIds">The item ids.</param>
+        void AddToCollection(Guid collectionId, IEnumerable<string> itemIds);
+
+        /// <summary>
+        /// Removes from collection.
+        /// </summary>
+        /// <param name="collectionId">The collection identifier.</param>
+        /// <param name="itemIds">The item ids.</param>
+        void RemoveFromCollection(Guid collectionId, IEnumerable<string> itemIds);
+
+        void AddToCollection(Guid collectionId, IEnumerable<Guid> itemIds);
+        void RemoveFromCollection(Guid collectionId, IEnumerable<Guid> itemIds);
+
+        /// <summary>
+        /// Collapses the items within box sets.
+        /// </summary>
+        /// <param name="items">The items.</param>
+        /// <param name="user">The user.</param>
+        /// <returns>IEnumerable{BaseItem}.</returns>
+        IEnumerable<BaseItem> CollapseItemsWithinBoxSets(IEnumerable<BaseItem> items, User user);
+    }
+}