[core/file_sys] implement IApplicationFunctions::GetPseudoDeviceId; common PatchManager::GetNACP for base|updates (#4159)

a bit of refactoring so there's less code duplication...
probably a good idea to make it a lambda anyways
maybe this is why QLauncher didn't have proper DLCs and updates?

either way "GetPseudoDeviceId" is now implemented (still stubbed) with a proper hash instead of just 0

Signed-off-by: lizzie <lizzie@eden-emu.dev>

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/4159
Reviewed-by: Maufeat <sahyno1996@gmail.com>
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>

3 files changed, 29 insertions, 17 deletions

diff --git a/src/core/file_sys/control_metadata.h b/src/core/file_sys/control_metadata.h
index 7b90ba235d..670e8f7389 100644
--- a/src/core/file_sys/control_metadata.h
+++ b/src/core/file_sys/control_metadata.h
@@ -274,23 +274,22 @@ public:
     explicit NACP(VirtualFile file);
     ~NACP();
 
-    const LanguageEntry& GetLanguageEntry() const;
-    std::string GetApplicationName() const;
-    std::string GetDeveloperName() const;
-    u64 GetTitleId() const;
-    u64 GetDLCBaseTitleId() const;
-    std::string GetVersionString() const;
-    u64 GetDefaultNormalSaveSize() const;
-    u64 GetDefaultJournalSaveSize() const;
-    u32 GetSupportedLanguages() const;
-    std::vector<std::string> GetApplicationNames() const;
-    std::vector<u8> GetRawBytes() const;
-    bool GetUserAccountSwitchLock() const;
-    u64 GetDeviceSaveDataSize() const;
-    u32 GetParentalControlFlag() const;
-    const std::array<u8, 0x20>& GetRatingAge() const;
-
-private:
+    [[nodiscard]] const LanguageEntry& GetLanguageEntry() const;
+    [[nodiscard]] std::string GetApplicationName() const;
+    [[nodiscard]] std::string GetDeveloperName() const;
+    [[nodiscard]] u64 GetTitleId() const;
+    [[nodiscard]] u64 GetDLCBaseTitleId() const;
+    [[nodiscard]] std::string GetVersionString() const;
+    [[nodiscard]] u64 GetDefaultNormalSaveSize() const;
+    [[nodiscard]] u64 GetDefaultJournalSaveSize() const;
+    [[nodiscard]] u32 GetSupportedLanguages() const;
+    [[nodiscard]] std::vector<std::string> GetApplicationNames() const;
+    [[nodiscard]] std::vector<u8> GetRawBytes() const;
+    [[nodiscard]] bool GetUserAccountSwitchLock() const;
+    [[nodiscard]] u64 GetDeviceSaveDataSize() const;
+    [[nodiscard]] u32 GetParentalControlFlag() const;
+    [[nodiscard]] const std::array<u8, 0x20>& GetRatingAge() const;
+
     RawNACP raw{};
     std::vector<LanguageEntry> language_entries;
 };
diff --git a/src/core/file_sys/patch_manager.cpp b/src/core/file_sys/patch_manager.cpp
index 80372ec94e..6ae4679054 100644
--- a/src/core/file_sys/patch_manager.cpp
+++ b/src/core/file_sys/patch_manager.cpp
@@ -1156,4 +1156,14 @@ PatchManager::Metadata PatchManager::ParseControlNCA(const NCA& nca) const {
 
     return {std::move(nacp), icon_file};
 }
+
+[[nodiscard]] PatchManager::Metadata PatchManager::GetMetadataFromBaseOrUpdate(Core::System& system, u64 application_id) noexcept {
+    const FileSys::PatchManager pm{application_id, system.GetFileSystemController(), system.GetContentProvider()};
+    auto metadata = pm.GetControlMetadata();
+    if (metadata.first != nullptr)
+        return metadata;
+    const FileSys::PatchManager pm_update{FileSys::GetUpdateTitleID(application_id), system.GetFileSystemController(), system.GetContentProvider()};
+    return pm_update.GetControlMetadata();
+}
+
 } // namespace FileSys
diff --git a/src/core/file_sys/patch_manager.h b/src/core/file_sys/patch_manager.h
index 755d924fd4..5d71dbcf20 100644
--- a/src/core/file_sys/patch_manager.h
+++ b/src/core/file_sys/patch_manager.h
@@ -105,6 +105,9 @@ public:
     // Version of GetControlMetadata that takes an arbitrary NCA
     [[nodiscard]] Metadata ParseControlNCA(const NCA& nca) const;
 
+    /// @brief Gets NACP metadata (accounting for any patches or updates)
+    [[nodiscard]] static PatchManager::Metadata GetMetadataFromBaseOrUpdate(Core::System& system, u64 application_id) noexcept;
+
 private:
     [[nodiscard]] std::vector<VirtualFile> CollectPatches(const std::vector<VirtualDir>& patch_dirs,
                                                           const std::string& build_id) const;