From 2108dc3b76894b5fe890ce4c7658a50654b43b65 Mon Sep 17 00:00:00 2001
From: Matthew Oldfield <moldfield95@googlemail.com>
Date: Mon, 10 Jul 2017 15:15:53 +0100
Subject: [PATCH] Implemented Workshop Item Subscription

Added subscribing to items as well as the UGC interfaces
GetNumSubscribedItems and GetSubscribedItems. Edited SteamUGC Method
GetSubscribedItems to accept array instead of a ptr to allow c# calling
---
 .../Interfaces/Workshop.Item.cs               | 13 ++++++++
 Facepunch.Steamworks/Interfaces/Workshop.cs   | 31 +++++++++++++++++++
 .../SteamNative/SteamNative.SteamUGC.cs       |  7 +++--
 3 files changed, 49 insertions(+), 2 deletions(-)

diff --git a/Facepunch.Steamworks/Interfaces/Workshop.Item.cs b/Facepunch.Steamworks/Interfaces/Workshop.Item.cs
index 5045028..21d943d 100644
--- a/Facepunch.Steamworks/Interfaces/Workshop.Item.cs
+++ b/Facepunch.Steamworks/Interfaces/Workshop.Item.cs
@@ -63,6 +63,19 @@ public void Download( bool highPriority = true )
                 workshop.OnItemInstalled += OnItemInstalled;
             }
 
+            public void Subscribe()
+            {
+                workshop.ugc.SubscribeItem(Id);
+                SubscriptionCount++;
+            }
+
+            public void UnSubscribe()
+            {
+                workshop.ugc.UnsubscribeItem(Id);
+                SubscriptionCount--;
+            }
+
+
             private void OnFileDownloaded( ulong fileid, Callbacks.Result result )
             {
                 if ( fileid != Id ) return;
diff --git a/Facepunch.Steamworks/Interfaces/Workshop.cs b/Facepunch.Steamworks/Interfaces/Workshop.cs
index 27e04e1..a9bde30 100644
--- a/Facepunch.Steamworks/Interfaces/Workshop.cs
+++ b/Facepunch.Steamworks/Interfaces/Workshop.cs
@@ -123,6 +123,37 @@ public Item GetItem( ulong itemid )
             return new Item( itemid, this );
         }
 
+        /// <summary>
+        /// The amount of item's the user is subscribed to for this App
+        /// </summary>
+        public uint GetAmountSubsribed()
+        {
+            return ugc.GetNumSubscribedItems();
+        }
+        /// <summary>
+        /// Creates a list of all item's that the user is currently subscribed
+        /// to for this App. This does not query titles or descriptions but
+        /// allows you to get the directories, state and ID of any subscribed Item.
+        /// This is mostly useful for getting all subscribed items install location.
+        /// </summary>
+        public Item[] GetSubscribedItems(uint amount)
+        {
+            Item[] items;
+            PublishedFileId_t[] vecSubscribedItems = new PublishedFileId_t[amount];
+            uint subAmount = ugc.GetSubscribedItems(vecSubscribedItems, amount);
+
+            if (subAmount < amount)
+                items = new Item[subAmount];
+            else
+                items = new Item[amount];
+
+            for(int i =0, length = items.Length; i<length; i++)
+            {
+                items[i] = new Item(vecSubscribedItems[i].Value, this);
+            }
+
+            return items;
+        }
 
         /// <summary>
         /// How a query should be ordered.
diff --git a/Facepunch.Steamworks/SteamNative/SteamNative.SteamUGC.cs b/Facepunch.Steamworks/SteamNative/SteamNative.SteamUGC.cs
index 7c5650f..d44321b 100644
--- a/Facepunch.Steamworks/SteamNative/SteamNative.SteamUGC.cs
+++ b/Facepunch.Steamworks/SteamNative/SteamNative.SteamUGC.cs
@@ -284,9 +284,12 @@ public bool GetQueryUGCStatistic( UGCQueryHandle_t handle /*UGCQueryHandle_t*/,
 		}
 		
 		// uint
-		public uint GetSubscribedItems( PublishedFileId_t* pvecPublishedFileID /*PublishedFileId_t **/, uint cMaxEntries /*uint32*/ )
+		public uint GetSubscribedItems( PublishedFileId_t[] pvecPublishedFileID /*PublishedFileId_t **/, uint cMaxEntries /*uint32*/ )
 		{
-			return platform.ISteamUGC_GetSubscribedItems( (IntPtr) pvecPublishedFileID, cMaxEntries );
+            fixed (PublishedFileId_t* pvecPublishedFileID_ptr = pvecPublishedFileID)
+            {
+                return platform.ISteamUGC_GetSubscribedItems((IntPtr)pvecPublishedFileID_ptr, cMaxEntries);
+            }
 		}
 		
 		// SteamAPICall_t