Add DLC support (#596)

* fs/core: Add DLC support

* fs/core: Fix extraction paths

* Fix DLC mounting

* gui: Add translations

src/common/path_util.cpp

@@ -106,6 +106,7 @@ static auto UserPaths = [] {
     create_path(PathType::CapturesDir, user_dir / CAPTURES_DIR);
     create_path(PathType::CheatsDir, user_dir / CHEATS_DIR);
     create_path(PathType::PatchesDir, user_dir / PATCHES_DIR);
+    create_path(PathType::AddonsDir, user_dir / ADDONS_DIR);
 
     return paths;
 }();

src/common/path_util.h

@@ -22,6 +22,7 @@ enum class PathType {
     CapturesDir,    // Where rdoc captures are stored.
     CheatsDir,      // Where cheats are stored.
     PatchesDir,     // Where patches are stored.
+    AddonsDir,      // Where additional content is stored.
 };
 
 constexpr auto PORTABLE_DIR = "user";
@@ -39,6 +40,7 @@ constexpr auto DOWNLOAD_DIR = "download";
 constexpr auto CAPTURES_DIR = "captures";
 constexpr auto CHEATS_DIR = "cheats";
 constexpr auto PATCHES_DIR = "patches";
+constexpr auto ADDONS_DIR = "addcont";
 
 // Filenames
 constexpr auto LOG_FILE = "shad_log.txt";

src/core/file_format/pkg.cpp

@@ -67,15 +67,19 @@ bool PKG::Open(const std::filesystem::path& filepath) {
     file.Seek(0x47); // skip first 7 characters of content_id
     file.Read(pkgTitleID);
 
-    file.Seek(0);
-    pkg.resize(pkgheader.pkg_promote_size);
-    file.Read(pkg);
-
     u32 offset = pkgheader.pkg_table_entry_offset;
     u32 n_files = pkgheader.pkg_table_entry_count;
+
+    file.Seek(offset);
     for (int i = 0; i < n_files; i++) {
-        PKGEntry entry;
+        PKGEntry entry{};
-        std::memcpy(&entry, &pkg[offset + i * 0x20], sizeof(entry));
+        file.Read(entry.id);
+        file.Read(entry.filename_offset);
+        file.Read(entry.flags1);
+        file.Read(entry.flags2);
+        file.Read(entry.offset);
+        file.Read(entry.size);
+        file.Seek(8, Common::FS::SeekOrigin::CurrentPosition);
 
         // Try to figure out the name
         const auto name = GetEntryNameByType(entry.id);
@@ -113,9 +117,6 @@ bool PKG::Extract(const std::filesystem::path& filepath, const std::filesystem::
         failreason = "Content size is bigger than pkg size";
         return false;
     }
-    file.Seek(0);
-    pkg.resize(pkgheader.pkg_promote_size);
-    file.Read(pkg);
 
     u32 offset = pkgheader.pkg_table_entry_offset;
     u32 n_files = pkgheader.pkg_table_entry_count;
@@ -126,9 +127,18 @@ bool PKG::Extract(const std::filesystem::path& filepath, const std::filesystem::
     std::array<std::array<u8, 256>, 7> key1;
     std::array<u8, 256> imgkeydata;
 
+    file.Seek(offset);
     for (int i = 0; i < n_files; i++) {
-        PKGEntry entry;
+        PKGEntry entry{};
-        std::memcpy(&entry, &pkg[offset + i * 0x20], sizeof(entry));
+        file.Read(entry.id);
+        file.Read(entry.filename_offset);
+        file.Read(entry.flags1);
+        file.Read(entry.flags2);
+        file.Read(entry.offset);
+        file.Read(entry.size);
+        file.Seek(8, Common::FS::SeekOrigin::CurrentPosition);
+
+        auto currentPos = file.Tell();
 
         // Try to figure out the name
         const auto name = GetEntryNameByType(entry.id);
@@ -139,8 +149,15 @@ bool PKG::Extract(const std::filesystem::path& filepath, const std::filesystem::
             // Just print with id
             Common::FS::IOFile out(extract_path / "sce_sys" / std::to_string(entry.id),
                                    Common::FS::FileAccessMode::Write);
-            out.WriteRaw<u8>(pkg.data() + entry.offset, entry.size);
+            file.Seek(entry.offset);
+
+            std::vector<u8> data;
+            data.resize(entry.size);
+            file.ReadRaw<u8>(data.data(), entry.size);
+            out.WriteRaw<u8>(data.data(), entry.size);
             out.Close();
+
+            file.Seek(currentPos);
             continue;
         }
 
@@ -178,14 +195,25 @@ bool PKG::Extract(const std::filesystem::path& filepath, const std::filesystem::
         }
 
         Common::FS::IOFile out(extract_path / "sce_sys" / name, Common::FS::FileAccessMode::Write);
-        out.WriteRaw<u8>(pkg.data() + entry.offset, entry.size);
+        file.Seek(entry.offset);
+
+        std::vector<u8> data;
+        data.resize(entry.size);
+        file.ReadRaw<u8>(data.data(), entry.size);
+        out.WriteRaw<u8>(data.data(), entry.size);
         out.Close();
 
         // Decrypt Np stuff and overwrite.
         if (entry.id == 0x400 || entry.id == 0x401 || entry.id == 0x402 ||
             entry.id == 0x403) { // somehow 0x401 is not decrypting
             decNp.resize(entry.size);
-            std::span<u8> cipherNp(pkg.data() + entry.offset, entry.size);
+            file.Seek(entry.offset);
+
+            std::vector<u8> data;
+            data.resize(entry.size);
+            file.ReadRaw<u8>(data.data(), entry.size);
+
+            std::span<u8> cipherNp(data.data(), entry.size);
             std::array<u8, 64> concatenated_ivkey_dk3_;
             std::memcpy(concatenated_ivkey_dk3_.data(), &entry, sizeof(entry));
             std::memcpy(concatenated_ivkey_dk3_.data() + sizeof(entry), dk3_.data(), sizeof(dk3_));
@@ -197,6 +225,8 @@ bool PKG::Extract(const std::filesystem::path& filepath, const std::filesystem::
             out.Write(decNp);
             out.Close();
         }
+
+        file.Seek(currentPos);
     }
 
     // Extract trophy files
@@ -214,6 +244,9 @@ bool PKG::Extract(const std::filesystem::path& filepath, const std::filesystem::
     PKG::crypto.PfsGenCryptoKey(ekpfsKey, seed, dataKey, tweakKey);
     const u32 length = pkgheader.pfs_cache_size * 0x2; // Seems to be ok.
 
+    int num_blocks = 0;
+    std::vector<u8> pfsc(length);
+    if (length != 0) {
         // Read encrypted pfs_image
         std::vector<u8> pfs_encrypted(length);
         file.Seek(pkgheader.pfs_image_offset);
@@ -225,18 +258,18 @@ bool PKG::Extract(const std::filesystem::path& filepath, const std::filesystem::
 
         // Retrieve PFSC from decrypted pfs_image.
         pfsc_offset = GetPFSCOffset(pfs_decrypted);
-    std::vector<u8> pfsc(length);
         std::memcpy(pfsc.data(), pfs_decrypted.data() + pfsc_offset, length - pfsc_offset);
 
         PFSCHdr pfsChdr;
         std::memcpy(&pfsChdr, pfsc.data(), sizeof(pfsChdr));
 
-    const int num_blocks = (int)(pfsChdr.data_length / pfsChdr.block_sz2);
+        num_blocks = (int)(pfsChdr.data_length / pfsChdr.block_sz2);
         sectorMap.resize(num_blocks + 1); // 8 bytes, need extra 1 to get the last offset.
 
         for (int i = 0; i < num_blocks + 1; i++) {
             std::memcpy(&sectorMap[i], pfsc.data() + pfsChdr.block_offsets + i * 8, 8);
         }
+    }
 
     u32 ent_size = 0;
     u32 ndinode = 0;
@@ -296,7 +329,15 @@ bool PKG::Extract(const std::filesystem::path& filepath, const std::filesystem::
                 } else {
                     // Set the the folder according to the current inode.
                     // Can be 2 or more (rarely)
-                    extractPaths[ndinode_counter] = extract_path.parent_path() / GetTitleID();
+                    auto parent_path = extract_path.parent_path();
+                    auto title_id = GetTitleID();
+
+                    if (parent_path.filename() != title_id) {
+                        extractPaths[ndinode_counter] = parent_path / title_id;
+                    } else {
+                        // DLCs path has different structure
+                        extractPaths[ndinode_counter] = extract_path;
+                    }
                     uroot_reached = false;
                     break;
                 }

src/core/file_format/pkg.h

@@ -149,7 +149,6 @@ public:
 private:
     Crypto crypto;
     TRP trp;
-    std::vector<u8> pkg;
     u64 pkgSize = 0;
     char pkgTitleID[9];
     PKGHeader pkgheader;

src/core/libraries/app_content/app_content.cpp

@@ -7,14 +7,33 @@
 #include <common/singleton.h>
 #include <core/file_format/psf.h>
 #include <core/file_sys/fs.h>
+
 #include "app_content.h"
 #include "common/io_file.h"
 #include "common/logging/log.h"
+#include "common/string_util.h"
 #include "core/libraries/error_codes.h"
 #include "core/libraries/libs.h"
 
 namespace Libraries::AppContent {
 
+int32_t addcont_count = 0;
+
+struct AddContInfo {
+    char entitlementLabel[ORBIS_NP_UNIFIED_ENTITLEMENT_LABEL_SIZE];
+    OrbisAppContentAddcontDownloadStatus status;
+    OrbisAppContentGetEntitlementKey key;
+};
+
+std::array<AddContInfo, ORBIS_APP_CONTENT_INFO_LIST_MAX_SIZE> addcont_info = {{
+    {"0000000000000000",
+     ORBIS_APP_CONTENT_ADDCONT_DOWNLOAD_STATUS_INSTALLED,
+     {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00}},
+}};
+
+std::string title_id;
+
 int PS4_SYSV_ABI _Z5dummyv() {
     LOG_ERROR(Lib_AppContent, "(STUBBED) called");
     return ORBIS_OK;
@@ -35,9 +54,31 @@ int PS4_SYSV_ABI sceAppContentAddcontEnqueueDownloadSp() {
     return ORBIS_OK;
 }
 
-int PS4_SYSV_ABI sceAppContentAddcontMount() {
+int PS4_SYSV_ABI sceAppContentAddcontMount(u32 service_label,
-    LOG_ERROR(Lib_AppContent, "(STUBBED) called");
+                                           const OrbisNpUnifiedEntitlementLabel* entitlement_label,
+                                           OrbisAppContentMountPoint* mount_point) {
+    LOG_INFO(Lib_AppContent, "called");
+
+    const auto& mount_dir = Common::FS::GetUserPath(Common::FS::PathType::AddonsDir) / title_id /
+                            entitlement_label->data;
+    auto* mnt = Common::Singleton<Core::FileSys::MntPoints>::Instance();
+
+    for (int i = 0; i < addcont_count; i++) {
+        if (strncmp(entitlement_label->data, addcont_info[i].entitlementLabel,
+                    ORBIS_NP_UNIFIED_ENTITLEMENT_LABEL_SIZE - 1) != 0) {
+            continue;
+        }
+
+        if (addcont_info[i].status != ORBIS_APP_CONTENT_ADDCONT_DOWNLOAD_STATUS_INSTALLED) {
+            return ORBIS_APP_CONTENT_ERROR_NOT_FOUND;
+        }
+
+        snprintf(mount_point->data, ORBIS_APP_CONTENT_MOUNTPOINT_DATA_MAXSIZE, "/addcont%d", i);
+        mnt->Mount(mount_dir, mount_point->data);
         return ORBIS_OK;
+    }
+
+    return ORBIS_APP_CONTENT_ERROR_NOT_FOUND;
 }
 
 int PS4_SYSV_ABI sceAppContentAddcontShrink() {
@@ -124,22 +165,80 @@ int PS4_SYSV_ABI sceAppContentGetAddcontDownloadProgress() {
     return ORBIS_OK;
 }
 
-int PS4_SYSV_ABI sceAppContentGetAddcontInfo() {
+int PS4_SYSV_ABI sceAppContentGetAddcontInfo(u32 service_label,
-    LOG_ERROR(Lib_AppContent, "(STUBBED) called");
+                                             const OrbisNpUnifiedEntitlementLabel* entitlementLabel,
+                                             OrbisAppContentAddcontInfo* info) {
+    LOG_INFO(Lib_AppContent, "called");
+
+    if (entitlementLabel == nullptr || info == nullptr) {
+        return ORBIS_APP_CONTENT_ERROR_PARAMETER;
+    }
+
+    for (auto i = 0; i < addcont_count; i++) {
+        if (strncmp(entitlementLabel->data, addcont_info[i].entitlementLabel,
+                    ORBIS_NP_UNIFIED_ENTITLEMENT_LABEL_SIZE - 1) != 0) {
+            continue;
+        }
+
+        LOG_INFO(Lib_AppContent, "found DLC {}", entitlementLabel->data);
+
+        strncpy(info->entitlement_label.data, addcont_info[i].entitlementLabel,
+                ORBIS_NP_UNIFIED_ENTITLEMENT_LABEL_SIZE);
+        info->status = addcont_info[i].status;
         return ORBIS_OK;
+    }
+
+    return ORBIS_APP_CONTENT_ERROR_DRM_NO_ENTITLEMENT;
 }
 
 int PS4_SYSV_ABI sceAppContentGetAddcontInfoList(u32 service_label,
                                                  OrbisAppContentAddcontInfo* list, u32 list_num,
                                                  u32* hit_num) {
-    *hit_num = 0;
+    LOG_INFO(Lib_AppContent, "called");
-    LOG_ERROR(Lib_AppContent, "(DUMMY) called");
+
+    if (list_num == 0 || list == nullptr) {
+        if (hit_num == nullptr) {
+            return ORBIS_APP_CONTENT_ERROR_PARAMETER;
+        }
+
+        *hit_num = addcont_count;
+        return ORBIS_OK;
+    }
+
+    int dlcs_to_list = addcont_count < list_num ? addcont_count : list_num;
+    for (int i = 0; i < dlcs_to_list; i++) {
+        strncpy(list[i].entitlement_label.data, addcont_info[i].entitlementLabel,
+                ORBIS_NP_UNIFIED_ENTITLEMENT_LABEL_SIZE);
+        list[i].status = addcont_info[i].status;
+    }
+
+    if (hit_num != nullptr) {
+        *hit_num = dlcs_to_list;
+    }
+
     return ORBIS_OK;
 }
 
-int PS4_SYSV_ABI sceAppContentGetEntitlementKey() {
+int PS4_SYSV_ABI sceAppContentGetEntitlementKey(
-    LOG_ERROR(Lib_AppContent, "(STUBBED) called");
+    u32 service_label, const OrbisNpUnifiedEntitlementLabel* entitlement_label,
+    OrbisAppContentGetEntitlementKey* key) {
+    LOG_ERROR(Lib_AppContent, "called");
+
+    if (entitlement_label == nullptr || key == nullptr) {
+        return ORBIS_APP_CONTENT_ERROR_PARAMETER;
+    }
+
+    for (int i = 0; i < addcont_count; i++) {
+        if (strncmp(entitlement_label->data, addcont_info[i].entitlementLabel,
+                    ORBIS_NP_UNIFIED_ENTITLEMENT_LABEL_SIZE - 1) != 0) {
+            continue;
+        }
+
+        memcpy(key->data, addcont_info[i].key.data, ORBIS_APP_CONTENT_ENTITLEMENT_KEY_SIZE);
         return ORBIS_OK;
+    }
+
+    return ORBIS_APP_CONTENT_ERROR_DRM_NO_ENTITLEMENT;
 }
 
 int PS4_SYSV_ABI sceAppContentGetRegion() {
@@ -150,7 +249,25 @@ int PS4_SYSV_ABI sceAppContentGetRegion() {
 int PS4_SYSV_ABI sceAppContentInitialize(const OrbisAppContentInitParam* initParam,
                                          OrbisAppContentBootParam* bootParam) {
     LOG_ERROR(Lib_AppContent, "(DUMMY) called");
-    bootParam->attr = 0; // always 0
+    auto* param_sfo = Common::Singleton<PSF>::Instance();
+
+    const auto addons_dir = Common::FS::GetUserPath(Common::FS::PathType::AddonsDir);
+    title_id = param_sfo->GetString("TITLE_ID");
+    auto addon_path = addons_dir / title_id;
+    if (std::filesystem::exists(addon_path)) {
+        for (const auto& entry : std::filesystem::directory_iterator(addon_path)) {
+            if (entry.is_directory()) {
+                auto entitlement_label = entry.path().filename().string();
+
+                AddContInfo info{};
+                info.status = ORBIS_APP_CONTENT_ADDCONT_DOWNLOAD_STATUS_INSTALLED;
+                strcpy(info.entitlementLabel, entitlement_label.c_str());
+
+                addcont_info[addcont_count++] = info;
+            }
+        }
+    }
+
     return ORBIS_OK;
 }
 

src/core/libraries/app_content/app_content.h

@@ -41,6 +41,16 @@ struct OrbisAppContentMountPoint {
 constexpr int ORBIS_APP_CONTENT_TEMPORARY_DATA_OPTION_NONE = 0;
 constexpr int ORBIS_APP_CONTENT_TEMPORARY_DATA_OPTION_FORMAT = (1 << 0);
 constexpr int ORBIS_NP_UNIFIED_ENTITLEMENT_LABEL_SIZE = 17;
+constexpr int ORBIS_APP_CONTENT_ENTITLEMENT_KEY_SIZE = 16;
+constexpr int ORBIS_APP_CONTENT_INFO_LIST_MAX_SIZE = 2500;
+
+enum OrbisAppContentAddcontDownloadStatus : u32 {
+    ORBIS_APP_CONTENT_ADDCONT_DOWNLOAD_STATUS_NO_EXTRA_DATA = 0,
+    ORBIS_APP_CONTENT_ADDCONT_DOWNLOAD_STATUS_NO_IN_QUEUE = 1,
+    ORBIS_APP_CONTENT_ADDCONT_DOWNLOAD_STATUS_DOWNLOADING = 2,
+    ORBIS_APP_CONTENT_ADDCONT_DOWNLOAD_STATUS_DOWNLOAD_SUSPENDED = 3,
+    ORBIS_APP_CONTENT_ADDCONT_DOWNLOAD_STATUS_INSTALLED = 4
+};
 
 struct OrbisNpUnifiedEntitlementLabel {
     char data[ORBIS_NP_UNIFIED_ENTITLEMENT_LABEL_SIZE];
@@ -54,11 +64,17 @@ struct OrbisAppContentAddcontInfo {
     u32 status;
 };
 
+struct OrbisAppContentGetEntitlementKey {
+    char data[ORBIS_APP_CONTENT_ENTITLEMENT_KEY_SIZE];
+};
+
 int PS4_SYSV_ABI _Z5dummyv();
 int PS4_SYSV_ABI sceAppContentAddcontDelete();
 int PS4_SYSV_ABI sceAppContentAddcontEnqueueDownload();
 int PS4_SYSV_ABI sceAppContentAddcontEnqueueDownloadSp();
-int PS4_SYSV_ABI sceAppContentAddcontMount();
+int PS4_SYSV_ABI sceAppContentAddcontMount(u32 service_label,
+                                           const OrbisNpUnifiedEntitlementLabel* entitlement_label,
+                                           OrbisAppContentMountPoint* mount_point);
 int PS4_SYSV_ABI sceAppContentAddcontShrink();
 int PS4_SYSV_ABI sceAppContentAddcontUnmount();
 int PS4_SYSV_ABI sceAppContentAppParamGetInt(OrbisAppContentAppParamId paramId, s32* value);
@@ -70,11 +86,15 @@ int PS4_SYSV_ABI sceAppContentDownload1Shrink();
 int PS4_SYSV_ABI sceAppContentDownloadDataFormat();
 int PS4_SYSV_ABI sceAppContentDownloadDataGetAvailableSpaceKb();
 int PS4_SYSV_ABI sceAppContentGetAddcontDownloadProgress();
-int PS4_SYSV_ABI sceAppContentGetAddcontInfo();
+int PS4_SYSV_ABI sceAppContentGetAddcontInfo(u32 service_label,
+                                             const OrbisNpUnifiedEntitlementLabel* entitlementLabel,
+                                             OrbisAppContentAddcontInfo* info);
 int PS4_SYSV_ABI sceAppContentGetAddcontInfoList(u32 service_label,
                                                  OrbisAppContentAddcontInfo* list, u32 list_num,
                                                  u32* hit_num);
-int PS4_SYSV_ABI sceAppContentGetEntitlementKey();
+int PS4_SYSV_ABI sceAppContentGetEntitlementKey(
+    u32 service_label, const OrbisNpUnifiedEntitlementLabel* entitlement_label,
+    OrbisAppContentGetEntitlementKey* key);
 int PS4_SYSV_ABI sceAppContentGetRegion();
 int PS4_SYSV_ABI sceAppContentInitialize(const OrbisAppContentInitParam* initParam,
                                          OrbisAppContentBootParam* bootParam);

src/core/libraries/error_codes.h

@@ -461,3 +461,5 @@ constexpr int ORBIS_AVPLAYER_ERROR_INFO_OTHER_ENCRY = 0x806A00BF;
 
 // AppContent library
 constexpr int ORBIS_APP_CONTENT_ERROR_PARAMETER = 0x80D90002;
+constexpr int ORBIS_APP_CONTENT_ERROR_DRM_NO_ENTITLEMENT = 0x80D90007;
+constexpr int ORBIS_APP_CONTENT_ERROR_NOT_FOUND = 0x80D90005;

src/qt_gui/main_window.cpp

@@ -7,6 +7,7 @@
 #include "about_dialog.h"
 #include "cheats_patches.h"
 #include "common/io_file.h"
+#include "common/string_util.h"
 #include "common/version.h"
 #include "core/file_format/pkg.h"
 #include "core/loader.h"
@@ -615,15 +616,24 @@ void MainWindow::InstallDragDropPkg(std::filesystem::path file, int pkgNum, int
         pkg = PKG();
         pkg.Open(file);
         std::string failreason;
-        const auto extract_path =
+        auto extract_path = std::filesystem::path(Config::getGameInstallDir()) / pkg.GetTitleID();
-            std::filesystem::path(Config::getGameInstallDir()) / pkg.GetTitleID();
         QString pkgType = QString::fromStdString(pkg.GetPkgFlags());
         QDir game_dir(QString::fromStdString(extract_path.string()));
         if (game_dir.exists()) {
             QMessageBox msgBox;
             msgBox.setWindowTitle(tr("PKG Extraction"));
-            if (pkgType.contains("PATCH")) {
+
             psf.open("", pkg.sfo);
+
+            std::string content_id = psf.GetString("CONTENT_ID");
+            std::string entitlement_label = Common::SplitString(content_id, '-')[2];
+
+            auto addon_extract_path = Common::FS::GetUserPath(Common::FS::PathType::AddonsDir) /
+                                      pkg.GetTitleID() / entitlement_label;
+            QDir addon_dir(QString::fromStdString(addon_extract_path.string()));
+            auto category = psf.GetString("CATEGORY");
+
+            if (pkgType.contains("PATCH")) {
                 QString pkg_app_version = QString::fromStdString(psf.GetString("APP_VER"));
                 psf.open(extract_path.string() + "/sce_sys/param.sfo", {});
                 QString game_app_version = QString::fromStdString(psf.GetString("APP_VER"));
@@ -657,6 +667,34 @@ void MainWindow::InstallDragDropPkg(std::filesystem::path file, int pkgNum, int
                 } else {
                     return;
                 }
+            } else if (category == "ac") {
+                if (!addon_dir.exists()) {
+                    QMessageBox addonMsgBox;
+                    addonMsgBox.setWindowTitle(tr("DLC Installation"));
+                    addonMsgBox.setText(QString(tr("Would you like to install DLC: %1?"))
+                                            .arg(QString::fromStdString(entitlement_label)));
+
+                    addonMsgBox.setStandardButtons(QMessageBox::Yes | QMessageBox::No);
+                    addonMsgBox.setDefaultButton(QMessageBox::No);
+                    int result = addonMsgBox.exec();
+                    if (result == QMessageBox::Yes) {
+                        extract_path = addon_extract_path;
+                    } else {
+                        return;
+                    }
+                } else {
+                    msgBox.setText(
+                        QString("DLC already installed\n%1\nWould you like to overwrite?")
+                            .arg(QString::fromStdString(addon_extract_path.string())));
+                    msgBox.setStandardButtons(QMessageBox::Yes | QMessageBox::No);
+                    msgBox.setDefaultButton(QMessageBox::No);
+                    int result = msgBox.exec();
+                    if (result == QMessageBox::Yes) {
+                        extract_path = addon_extract_path;
+                    } else {
+                        return;
+                    }
+                }
             } else {
                 msgBox.setText(
                     QString(tr("Game already installed\n%1\nWould you like to overwrite?"))
@@ -685,6 +723,7 @@ void MainWindow::InstallDragDropPkg(std::filesystem::path file, int pkgNum, int
         } else {
             int nfiles = pkg.GetNumberOfFiles();
 
+            if (nfiles > 0) {
                 QVector<int> indices;
                 for (int i = 0; i < nfiles; i++) {
                     indices.append(i);
@@ -725,6 +764,7 @@ void MainWindow::InstallDragDropPkg(std::filesystem::path file, int pkgNum, int
                     QtConcurrent::map(indices, [&](int index) { pkg.ExtractFiles(index); }));
                 dialog.exec();
             }
+        }
     } else {
         QMessageBox::critical(this, tr("PKG ERROR"),
                               tr("File doesn't appear to be a valid PKG file"));

src/qt_gui/translations/da_DK.ts

@@ -605,6 +605,16 @@
             <source>Game already installed\n%1\nWould you like to overwrite?</source>
             <translation>Spil allerede installeret\n%1\nVil du overskrive?</translation>
         </message>
+        <message>
+            <location filename="../main_window.cpp" line="673"/>
+            <source>DLC Installation</source>
+            <translation>DLC Installation</translation>
+        </message>
+        <message>
+            <location filename="../main_window.cpp" line="674"/>
+            <source>Would you like to install DLC: %1?</source>
+            <translation>Would you like to install DLC: %1?</translation>
+        </message>
         <message>
             <location filename="../main_window.cpp" line="674"/>
             <source>PKG is a patch, please install the game first!</source>

src/qt_gui/translations/de.ts

@@ -605,6 +605,16 @@
             <source>Game already installed\n%1\nWould you like to overwrite?</source>
             <translation>Spiel bereits installiert\n%1\nMöchten Sie überschreiben?</translation>
         </message>
+        <message>
+            <location filename="../main_window.cpp" line="673"/>
+            <source>DLC Installation</source>
+            <translation>DLC Installation</translation>
+        </message>
+        <message>
+            <location filename="../main_window.cpp" line="674"/>
+            <source>Would you like to install DLC: %1?</source>
+            <translation>Would you like to install DLC: %1?</translation>
+        </message>
         <message>
             <location filename="../main_window.cpp" line="674"/>
             <source>PKG is a patch, please install the game first!</source>

src/qt_gui/translations/el.ts

@@ -605,6 +605,16 @@
             <source>Game already installed\n%1\nWould you like to overwrite?</source>
             <translation>Το παιχνίδι είναι ήδη εγκατεστημένο\n%1\nΘέλετε να αντικαταστήσετε;</translation>
         </message>
+        <message>
+            <location filename="../main_window.cpp" line="673"/>
+            <source>DLC Installation</source>
+            <translation>DLC Installation</translation>
+        </message>
+        <message>
+            <location filename="../main_window.cpp" line="674"/>
+            <source>Would you like to install DLC: %1?</source>
+            <translation>Would you like to install DLC: %1?</translation>
+        </message>
         <message>
             <location filename="../main_window.cpp" line="674"/>
             <source>PKG is a patch, please install the game first!</source>

src/qt_gui/translations/en.ts

@@ -605,6 +605,16 @@
         	<source>Game already installed\n%1\nWould you like to overwrite?</source>
         	<translation>Game already installed\n%1\nWould you like to overwrite?</translation>
         </message>
+        <message>
+            <location filename="../main_window.cpp" line="673"/>
+            <source>DLC Installation</source>
+            <translation>DLC Installation</translation>
+        </message>
+        <message>
+            <location filename="../main_window.cpp" line="674"/>
+            <source>Would you like to install DLC: %1?</source>
+            <translation>Would you like to install DLC: %1?</translation>
+        </message>
         <message>
         	<location filename="../main_window.cpp" line="674"/>
         	<source>PKG is a patch, please install the game first!</source>

src/qt_gui/translations/es_ES.ts

@@ -605,6 +605,16 @@
         	<source>Game already installed\n%1\nWould you like to overwrite?</source>
         	<translation>Juego ya instalado\n%1\n¿Te gustaría sobrescribirlo?</translation>
         </message>
+        <message>
+            <location filename="../main_window.cpp" line="673"/>
+            <source>DLC Installation</source>
+            <translation>DLC Installation</translation>
+        </message>
+        <message>
+            <location filename="../main_window.cpp" line="674"/>
+            <source>Would you like to install DLC: %1?</source>
+            <translation>Would you like to install DLC: %1?</translation>
+        </message>
         <message>
         	<location filename="../main_window.cpp" line="674"/>
         	<source>PKG is a patch, please install the game first!</source>

src/qt_gui/translations/fi.ts

@@ -605,6 +605,16 @@
             <source>Game already installed\n%1\nWould you like to overwrite?</source>
             <translation>Peli on jo asennettu\n%1\nHaluatko korvata sen?</translation>
         </message>
+        <message>
+            <location filename="../main_window.cpp" line="673"/>
+            <source>DLC Installation</source>
+            <translation>DLC Installation</translation>
+        </message>
+        <message>
+            <location filename="../main_window.cpp" line="674"/>
+            <source>Would you like to install DLC: %1?</source>
+            <translation>Would you like to install DLC: %1?</translation>
+        </message>
         <message>
             <location filename="../main_window.cpp" line="674"/>
             <source>PKG is a patch, please install the game first!</source>

src/qt_gui/translations/fr.ts

@@ -605,6 +605,16 @@
             <source>Game already installed\n%1\nWould you like to overwrite?</source>
             <translation>Jeu déjà installé\n%1\nSouhaitez-vous écraser ?</translation>
         </message>
+        <message>
+            <location filename="../main_window.cpp" line="673"/>
+            <source>DLC Installation</source>
+            <translation>DLC Installation</translation>
+        </message>
+        <message>
+            <location filename="../main_window.cpp" line="674"/>
+            <source>Would you like to install DLC: %1?</source>
+            <translation>Would you like to install DLC: %1?</translation>
+        </message>
         <message>
             <location filename="../main_window.cpp" line="674"/>
             <source>PKG is a patch, please install the game first!</source>

src/qt_gui/translations/hu_HU.ts

@@ -605,6 +605,16 @@
         	<source>Game already installed\n%1\nWould you like to overwrite?</source>
         	<translation>A játék már telepítve van\n%1\nSzeretnéd felülírni?</translation>
         </message>
+        <message>
+            <location filename="../main_window.cpp" line="673"/>
+            <source>DLC Installation</source>
+            <translation>DLC Installation</translation>
+        </message>
+        <message>
+            <location filename="../main_window.cpp" line="674"/>
+            <source>Would you like to install DLC: %1?</source>
+            <translation>Would you like to install DLC: %1?</translation>
+        </message>
         <message>
         	<location filename="../main_window.cpp" line="674"/>
         	<source>PKG is a patch, please install the game first!</source>

src/qt_gui/translations/id.ts

@@ -605,6 +605,16 @@
         	<source>Game already installed\n%1\nWould you like to overwrite?</source>
         	<translation>Game sudah terpasang\n%1\nApakah Anda ingin menimpa?</translation>
         </message>
+        <message>
+            <location filename="../main_window.cpp" line="673"/>
+            <source>DLC Installation</source>
+            <translation>DLC Installation</translation>
+        </message>
+        <message>
+            <location filename="../main_window.cpp" line="674"/>
+            <source>Would you like to install DLC: %1?</source>
+            <translation>Would you like to install DLC: %1?</translation>
+        </message>
         <message>
         	<location filename="../main_window.cpp" line="674"/>
         	<source>PKG is a patch, please install the game first!</source>

src/qt_gui/translations/it.ts

@@ -605,6 +605,16 @@
             <source>Game already installed\n%1\nWould you like to overwrite?</source>
             <translation>Game sudah terinstal\n%1\nApakah Anda ingin menimpa?</translation>
         </message>
+        <message>
+            <location filename="../main_window.cpp" line="673"/>
+            <source>DLC Installation</source>
+            <translation>DLC Installation</translation>
+        </message>
+        <message>
+            <location filename="../main_window.cpp" line="674"/>
+            <source>Would you like to install DLC: %1?</source>
+            <translation>Would you like to install DLC: %1?</translation>
+        </message>
         <message>
             <location filename="../main_window.cpp" line="674"/>
             <source>PKG is a patch, please install the game first!</source>

src/qt_gui/translations/ja_JP.ts

@@ -605,6 +605,16 @@
         	<source>Game already installed\n%1\nWould you like to overwrite?</source>
         	<translation>ゲームはすでにインストールされています\n%1\n上書きしますか？</translation>
         </message>
+        <message>
+            <location filename="../main_window.cpp" line="673"/>
+            <source>DLC Installation</source>
+            <translation>DLC Installation</translation>
+        </message>
+        <message>
+            <location filename="../main_window.cpp" line="674"/>
+            <source>Would you like to install DLC: %1?</source>
+            <translation>Would you like to install DLC: %1?</translation>
+        </message>
         <message>
         	<location filename="../main_window.cpp" line="674"/>
         	<source>PKG is a patch, please install the game first!</source>

src/qt_gui/translations/ko_KR.ts

@@ -605,6 +605,16 @@
         	<source>Game already installed\n%1\nWould you like to overwrite?</source>
         	<translation>Game already installed\n%1\nWould you like to overwrite?</translation>
         </message>
+        <message>
+            <location filename="../main_window.cpp" line="673"/>
+            <source>DLC Installation</source>
+            <translation>DLC Installation</translation>
+        </message>
+        <message>
+            <location filename="../main_window.cpp" line="674"/>
+            <source>Would you like to install DLC: %1?</source>
+            <translation>Would you like to install DLC: %1?</translation>
+        </message>
         <message>
         	<location filename="../main_window.cpp" line="674"/>
         	<source>PKG is a patch, please install the game first!</source>

src/qt_gui/translations/lt_LT.ts

@@ -605,6 +605,16 @@
         	<source>Game already installed\n%1\nWould you like to overwrite?</source>
         	<translation>Žaidimas jau įdiegtas\n%1\nAr norėtumėte perrašyti?</translation>
         </message>
+        <message>
+            <location filename="../main_window.cpp" line="673"/>
+            <source>DLC Installation</source>
+            <translation>DLC Installation</translation>
+        </message>
+        <message>
+            <location filename="../main_window.cpp" line="674"/>
+            <source>Would you like to install DLC: %1?</source>
+            <translation>Would you like to install DLC: %1?</translation>
+        </message>
         <message>
         	<location filename="../main_window.cpp" line="674"/>
         	<source>PKG is a patch, please install the game first!</source>

src/qt_gui/translations/nb.ts

@@ -605,6 +605,16 @@
             <source>Game already installed\n%1\nWould you like to overwrite?</source>
             <translation>Spill allerede installert\n%1\nØnsker du å overskrive?</translation>
         </message>
+        <message>
+            <location filename="../main_window.cpp" line="673"/>
+            <source>DLC Installation</source>
+            <translation>DLC Installation</translation>
+        </message>
+        <message>
+            <location filename="../main_window.cpp" line="674"/>
+            <source>Would you like to install DLC: %1?</source>
+            <translation>Would you like to install DLC: %1?</translation>
+        </message>
         <message>
             <location filename="../main_window.cpp" line="674"/>
             <source>PKG is a patch, please install the game first!</source>

src/qt_gui/translations/nl.ts

@@ -605,6 +605,16 @@
             <source>Game already installed\n%1\nWould you like to overwrite?</source>
             <translation>Spel al geïnstalleerd\n%1\nWil je het overschrijven?</translation>
         </message>
+        <message>
+            <location filename="../main_window.cpp" line="673"/>
+            <source>DLC Installation</source>
+            <translation>DLC Installation</translation>
+        </message>
+        <message>
+            <location filename="../main_window.cpp" line="674"/>
+            <source>Would you like to install DLC: %1?</source>
+            <translation>Would you like to install DLC: %1?</translation>
+        </message>
         <message>
             <location filename="../main_window.cpp" line="674"/>
             <source>PKG is a patch, please install the game first!</source>

src/qt_gui/translations/pl_PL.ts

@@ -605,6 +605,16 @@
             <source>Game already installed\n%1\nWould you like to overwrite?</source>
             <translation>Gra już zainstalowana\n%1\nCzy chcesz ją nadpisać?</translation>
         </message>
+        <message>
+            <location filename="../main_window.cpp" line="673"/>
+            <source>DLC Installation</source>
+            <translation>DLC Installation</translation>
+        </message>
+        <message>
+            <location filename="../main_window.cpp" line="674"/>
+            <source>Would you like to install DLC: %1?</source>
+            <translation>Would you like to install DLC: %1?</translation>
+        </message>
         <message>
             <location filename="../main_window.cpp" line="674"/>
             <source>PKG is a patch, please install the game first!</source>

src/qt_gui/translations/pt_BR.ts

@@ -605,6 +605,16 @@
         	<source>Game already installed\n%1\nWould you like to overwrite?</source>
         	<translation>Jogo já instalado\n%1\nGostaria de substituir?</translation>
         </message>
+        <message>
+            <location filename="../main_window.cpp" line="673"/>
+            <source>DLC Installation</source>
+            <translation>DLC Installation</translation>
+        </message>
+        <message>
+            <location filename="../main_window.cpp" line="674"/>
+            <source>Would you like to install DLC: %1?</source>
+            <translation>Would you like to install DLC: %1?</translation>
+        </message>
         <message>
         	<location filename="../main_window.cpp" line="674"/>
         	<source>PKG is a patch, please install the game first!</source>

src/qt_gui/translations/ro_RO.ts

@@ -605,6 +605,16 @@
             <source>Game already installed\n%1\nWould you like to overwrite?</source>
             <translation>Jocul este deja instalat\n%1\nAi dori să suprascrii?</translation>
         </message>
+        <message>
+            <location filename="../main_window.cpp" line="673"/>
+            <source>DLC Installation</source>
+            <translation>DLC Installation</translation>
+        </message>
+        <message>
+            <location filename="../main_window.cpp" line="674"/>
+            <source>Would you like to install DLC: %1?</source>
+            <translation>Would you like to install DLC: %1?</translation>
+        </message>
         <message>
             <location filename="../main_window.cpp" line="674"/>
             <source>PKG is a patch, please install the game first!</source>

src/qt_gui/translations/ru_RU.ts

@@ -605,6 +605,16 @@
         	<source>Game already installed\n%1\nWould you like to overwrite?</source>
         	<translation>Игра уже установлена\n%1\nХотите перезаписать?</translation>
         </message>
+        <message>
+            <location filename="../main_window.cpp" line="673"/>
+            <source>DLC Installation</source>
+            <translation>DLC Installation</translation>
+        </message>
+        <message>
+            <location filename="../main_window.cpp" line="674"/>
+            <source>Would you like to install DLC: %1?</source>
+            <translation>Would you like to install DLC: %1?</translation>
+        </message>
         <message>
         	<location filename="../main_window.cpp" line="674"/>
         	<source>PKG is a patch, please install the game first!</source>

src/qt_gui/translations/tr_TR.ts

@@ -605,6 +605,16 @@
         	<source>Game already installed\n%1\nWould you like to overwrite?</source>
         	<translation>Oyun zaten yüklü\n%1\nÜzerine yazmak ister misiniz?</translation>
         </message>
+        <message>
+            <location filename="../main_window.cpp" line="673"/>
+            <source>DLC Installation</source>
+            <translation>DLC Installation</translation>
+        </message>
+        <message>
+            <location filename="../main_window.cpp" line="674"/>
+            <source>Would you like to install DLC: %1?</source>
+            <translation>Would you like to install DLC: %1?</translation>
+        </message>
         <message>
         	<location filename="../main_window.cpp" line="674"/>
         	<source>PKG is a patch, please install the game first!</source>

src/qt_gui/translations/vi_VN.ts

@@ -605,6 +605,16 @@
             <source>Game already installed\n%1\nWould you like to overwrite?</source>
             <translation>Trò chơi đã được cài đặt\n%1\nBạn có muốn ghi đè không?</translation>
         </message>
+        <message>
+            <location filename="../main_window.cpp" line="673"/>
+            <source>DLC Installation</source>
+            <translation>DLC Installation</translation>
+        </message>
+        <message>
+            <location filename="../main_window.cpp" line="674"/>
+            <source>Would you like to install DLC: %1?</source>
+            <translation>Would you like to install DLC: %1?</translation>
+        </message>
         <message>
             <location filename="../main_window.cpp" line="674"/>
             <source>PKG is a patch, please install the game first!</source>

src/qt_gui/translations/zh_CN.ts

@@ -605,6 +605,16 @@
             <source>Game already installed\n%1\nWould you like to overwrite?</source>
             <translation>游戏已安装\n%1\n您想要覆盖吗？</translation>
         </message>
+        <message>
+            <location filename="../main_window.cpp" line="673"/>
+            <source>DLC Installation</source>
+            <translation>DLC Installation</translation>
+        </message>
+        <message>
+            <location filename="../main_window.cpp" line="674"/>
+            <source>Would you like to install DLC: %1?</source>
+            <translation>Would you like to install DLC: %1?</translation>
+        </message>
         <message>
             <location filename="../main_window.cpp" line="674"/>
             <source>PKG is a patch, please install the game first!</source>

src/qt_gui/translations/zh_TW.ts

@@ -605,6 +605,16 @@
             <source>Game already installed\n%1\nWould you like to overwrite?</source>
             <translation>遊戲已經安裝\n%1\n您是否希望覆蓋？</translation>
         </message>
+        <message>
+            <location filename="../main_window.cpp" line="673"/>
+            <source>DLC Installation</source>
+            <translation>DLC Installation</translation>
+        </message>
+        <message>
+            <location filename="../main_window.cpp" line="674"/>
+            <source>Would you like to install DLC: %1?</source>
+            <translation>Would you like to install DLC: %1?</translation>
+        </message>
         <message>
             <location filename="../main_window.cpp" line="674"/>
             <source>PKG is a patch, please install the game first!</source>