From 5c3cfb84c09b0566da677425915afa0b2d76da55 Mon Sep 17 00:00:00 2001
From: TSRBerry <20988865+TSRBerry@users.noreply.github.com>
Date: Sat, 11 Nov 2023 21:56:57 +0100
Subject: Add support for multi game XCIs (#5638)

* Add default values to ApplicationData directly

* Refactor application loading

It should now be possible to load multi game XCIs.
Included updates won't be detected for now.
Opening a game from the command line currently only opens the first one.

* Only include program NCAs where at least one tuple item is not null

* Get application data by title id and add programIndex check back

* Refactor application loading again and remove duplicate code

* Actually use patch ncas for updates

* Fix number of applications found with multi game xcis

* Don't load bundled updates from multi game xcis

* Change ApplicationData.TitleId type to ulong & Add TitleIdString property

* Use cnmt files and ContentCollection to load programs

* Ava: Add updates and DLCs from gamecarts

* Get the cnmt file from its NCA

* Ava: Identify bundled updates in updater window

* Fix the (hopefully) last few bugs

* Add idOffset parameter to GetNcaByType

* Handle missing file for dlc.json

* Ava: Shorten error message for invalid files

* Gtk: Add additional string for bundled updates in TitleUpdateWindow

* Hopefully fix DLC issues

* Apply formatting

* Finally fix DLC issues

* Adjust property names and fileSize field

* Read the correct update file

* Fix wrong casing for application id strings

* Rename TitleId to ApplicationId

* Address review comments

* Fix formatting issues

* Apply suggestions from code review

Co-authored-by: gdkchan <gab.dark.100@gmail.com>

* Gracefully fail when loading pfs for update and dlc window

* Fix applications with multiple programs

* Fix DLCWindow crash on GTK

* Fix some GUI issues

* Remove IsXci again

---------

Co-authored-by: gdkchan <gab.dark.100@gmail.com>
---
 src/Ryujinx.HLE/FileSystem/ContentCollection.cs | 61 +++++++++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 src/Ryujinx.HLE/FileSystem/ContentCollection.cs

(limited to 'src/Ryujinx.HLE/FileSystem/ContentCollection.cs')

diff --git a/src/Ryujinx.HLE/FileSystem/ContentCollection.cs b/src/Ryujinx.HLE/FileSystem/ContentCollection.cs
new file mode 100644
index 00000000..1c19887b
--- /dev/null
+++ b/src/Ryujinx.HLE/FileSystem/ContentCollection.cs
@@ -0,0 +1,61 @@
+using LibHac.Common.Keys;
+using LibHac.Fs.Fsa;
+using LibHac.Ncm;
+using LibHac.Tools.FsSystem.NcaUtils;
+using LibHac.Tools.Ncm;
+using Ryujinx.HLE.Loaders.Processes.Extensions;
+using System;
+
+namespace Ryujinx.HLE.FileSystem
+{
+    /// <summary>
+    /// Thin wrapper around <see cref="Cnmt"/>
+    /// </summary>
+    public class ContentCollection
+    {
+        private readonly IFileSystem _pfs;
+        private readonly Cnmt _cnmt;
+
+        public ulong Id => _cnmt.TitleId;
+        public TitleVersion Version => _cnmt.TitleVersion;
+        public ContentMetaType Type => _cnmt.Type;
+        public ulong ApplicationId => _cnmt.ApplicationTitleId;
+        public ulong PatchId => _cnmt.PatchTitleId;
+        public TitleVersion RequiredSystemVersion => _cnmt.MinimumSystemVersion;
+        public TitleVersion RequiredApplicationVersion => _cnmt.MinimumApplicationVersion;
+        public byte[] Digest => _cnmt.Hash;
+
+        public ulong ProgramBaseId => Id & ~0x1FFFUL;
+        public bool IsSystemTitle => _cnmt.Type < ContentMetaType.Application;
+
+        public ContentCollection(IFileSystem pfs, Cnmt cnmt)
+        {
+            _pfs = pfs;
+            _cnmt = cnmt;
+        }
+
+        public Nca GetNcaByType(KeySet keySet, ContentType type, int programIndex = 0)
+        {
+            // TODO: Replace this with a check for IdOffset as soon as LibHac supports it:
+            // && entry.IdOffset == programIndex
+
+            foreach (var entry in _cnmt.ContentEntries)
+            {
+                if (entry.Type != type)
+                {
+                    continue;
+                }
+
+                string ncaId = BitConverter.ToString(entry.NcaId).Replace("-", null).ToLower();
+                Nca nca = _pfs.GetNca(keySet, $"/{ncaId}.nca");
+
+                if (nca.GetProgramIndex() == programIndex)
+                {
+                    return nca;
+                }
+            }
+
+            return null;
+        }
+    }
+}
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