FileSys: abstract SD save data archive source

6 files changed, 136 insertions, 79 deletions

diff --git a/src/core/CMakeLists.txt b/src/core/CMakeLists.txt
index 299f1f261..3f762ed52 100644
--- a/src/core/CMakeLists.txt
+++ b/src/core/CMakeLists.txt
@@ -22,6 +22,7 @@ set(SRCS
             file_sys/archive_savedata.cpp
             file_sys/archive_sdmc.cpp
             file_sys/archive_sdmcwriteonly.cpp
+            file_sys/archive_source_sd_savedata.cpp
             file_sys/archive_systemsavedata.cpp
             file_sys/disk_archive.cpp
             file_sys/ivfc_archive.cpp
@@ -167,6 +168,7 @@ set(HEADERS
             file_sys/archive_savedata.h
             file_sys/archive_sdmc.h
             file_sys/archive_sdmcwriteonly.h
+            file_sys/archive_source_sd_savedata.h
             file_sys/archive_systemsavedata.h
             file_sys/directory_backend.h
             file_sys/disk_archive.h
diff --git a/src/core/file_sys/archive_savedata.cpp b/src/core/file_sys/archive_savedata.cpp
index ecb44a215..61f7654f7 100644
--- a/src/core/file_sys/archive_savedata.cpp
+++ b/src/core/file_sys/archive_savedata.cpp
@@ -2,96 +2,29 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
-#include <algorithm>
-#include <memory>
-#include "common/common_types.h"
-#include "common/file_util.h"
-#include "common/logging/log.h"
-#include "common/string_util.h"
 #include "core/file_sys/archive_savedata.h"
-#include "core/file_sys/savedata_archive.h"
 #include "core/hle/kernel/process.h"
-#include "core/hle/service/fs/archive.h"
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 // FileSys namespace
 
 namespace FileSys {
 
-static std::string GetSaveDataContainerPath(const std::string& sdmc_directory) {
-    return Common::StringFromFormat("%sNintendo 3DS/%s/%s/title/", sdmc_directory.c_str(),
-                                    SYSTEM_ID.c_str(), SDCARD_ID.c_str());
-}
-
-static std::string GetSaveDataPath(const std::string& mount_location, u64 program_id) {
-    u32 high = (u32)(program_id >> 32);
-    u32 low = (u32)(program_id & 0xFFFFFFFF);
-    return Common::StringFromFormat("%s%08x/%08x/data/00000001/", mount_location.c_str(), high,
-                                    low);
-}
-
-static std::string GetSaveDataMetadataPath(const std::string& mount_location, u64 program_id) {
-    u32 high = (u32)(program_id >> 32);
-    u32 low = (u32)(program_id & 0xFFFFFFFF);
-    return Common::StringFromFormat("%s%08x/%08x/data/00000001.metadata", mount_location.c_str(),
-                                    high, low);
-}
-
-ArchiveFactory_SaveData::ArchiveFactory_SaveData(const std::string& sdmc_directory)
-    : mount_point(GetSaveDataContainerPath(sdmc_directory)) {
-    LOG_INFO(Service_FS, "Directory %s set as SaveData.", this->mount_point.c_str());
-}
+ArchiveFactory_SaveData::ArchiveFactory_SaveData(
+    std::shared_ptr<ArchiveSource_SDSaveData> sd_savedata)
+    : sd_savedata_source(sd_savedata) {}
 
 ResultVal<std::unique_ptr<ArchiveBackend>> ArchiveFactory_SaveData::Open(const Path& path) {
-    std::string concrete_mount_point =
-        GetSaveDataPath(mount_point, Kernel::g_current_process->codeset->program_id);
-    if (!FileUtil::Exists(concrete_mount_point)) {
-        // When a SaveData archive is created for the first time, it is not yet formatted and the
-        // save file/directory structure expected by the game has not yet been initialized.
-        // Returning the NotFormatted error code will signal the game to provision the SaveData
-        // archive with the files and folders that it expects.
-        return ResultCode(ErrorDescription::FS_NotFormatted, ErrorModule::FS,
-                          ErrorSummary::InvalidState, ErrorLevel::Status);
-    }
-
-    auto archive = std::make_unique<SaveDataArchive>(std::move(concrete_mount_point));
-    return MakeResult<std::unique_ptr<ArchiveBackend>>(std::move(archive));
+    return sd_savedata_source->Open(Kernel::g_current_process->codeset->program_id);
 }
 
 ResultCode ArchiveFactory_SaveData::Format(const Path& path,
                                            const FileSys::ArchiveFormatInfo& format_info) {
-    std::string concrete_mount_point =
-        GetSaveDataPath(mount_point, Kernel::g_current_process->codeset->program_id);
-    FileUtil::DeleteDirRecursively(concrete_mount_point);
-    FileUtil::CreateFullPath(concrete_mount_point);
-
-    // Write the format metadata
-    std::string metadata_path =
-        GetSaveDataMetadataPath(mount_point, Kernel::g_current_process->codeset->program_id);
-    FileUtil::IOFile file(metadata_path, "wb");
-
-    if (file.IsOpen()) {
-        file.WriteBytes(&format_info, sizeof(format_info));
-        return RESULT_SUCCESS;
-    }
-    return RESULT_SUCCESS;
+    return sd_savedata_source->Format(Kernel::g_current_process->codeset->program_id, format_info);
 }
 
 ResultVal<ArchiveFormatInfo> ArchiveFactory_SaveData::GetFormatInfo(const Path& path) const {
-    std::string metadata_path =
-        GetSaveDataMetadataPath(mount_point, Kernel::g_current_process->codeset->program_id);
-    FileUtil::IOFile file(metadata_path, "rb");
-
-    if (!file.IsOpen()) {
-        LOG_ERROR(Service_FS, "Could not open metadata information for archive");
-        // TODO(Subv): Verify error code
-        return ResultCode(ErrorDescription::FS_NotFormatted, ErrorModule::FS,
-                          ErrorSummary::InvalidState, ErrorLevel::Status);
-    }
-
-    ArchiveFormatInfo info = {};
-    file.ReadBytes(&info, sizeof(info));
-    return MakeResult<ArchiveFormatInfo>(info);
+    return sd_savedata_source->GetFormatInfo(Kernel::g_current_process->codeset->program_id);
 }
 
 } // namespace FileSys
diff --git a/src/core/file_sys/archive_savedata.h b/src/core/file_sys/archive_savedata.h
index 6a372865a..41aa6f189 100644
--- a/src/core/file_sys/archive_savedata.h
+++ b/src/core/file_sys/archive_savedata.h
@@ -4,10 +4,7 @@
 
 #pragma once
 
-#include <memory>
-#include <string>
-#include "core/file_sys/archive_backend.h"
-#include "core/hle/result.h"
+#include "core/file_sys/archive_source_sd_savedata.h"
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 // FileSys namespace
@@ -17,7 +14,7 @@ namespace FileSys {
 /// File system interface to the SaveData archive
 class ArchiveFactory_SaveData final : public ArchiveFactory {
 public:
-    ArchiveFactory_SaveData(const std::string& mount_point);
+    explicit ArchiveFactory_SaveData(std::shared_ptr<ArchiveSource_SDSaveData> sd_savedata_source);
 
     std::string GetName() const override {
         return "SaveData";
@@ -30,6 +27,7 @@ public:
 
 private:
     std::string mount_point;
+    std::shared_ptr<ArchiveSource_SDSaveData> sd_savedata_source;
 };
 
 } // namespace FileSys
diff --git a/src/core/file_sys/archive_source_sd_savedata.cpp b/src/core/file_sys/archive_source_sd_savedata.cpp
new file mode 100644
index 000000000..2d8a950a3
--- /dev/null
+++ b/src/core/file_sys/archive_source_sd_savedata.cpp
@@ -0,0 +1,93 @@
+// Copyright 2016 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/file_util.h"
+#include "common/logging/log.h"
+#include "common/string_util.h"
+#include "core/file_sys/archive_source_sd_savedata.h"
+#include "core/file_sys/savedata_archive.h"
+#include "core/hle/service/fs/archive.h"
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+// FileSys namespace
+
+namespace FileSys {
+
+namespace {
+
+std::string GetSaveDataContainerPath(const std::string& sdmc_directory) {
+    return Common::StringFromFormat("%sNintendo 3DS/%s/%s/title/", sdmc_directory.c_str(),
+                                    SYSTEM_ID.c_str(), SDCARD_ID.c_str());
+}
+
+std::string GetSaveDataPath(const std::string& mount_location, u64 program_id) {
+    u32 high = static_cast<u32>(program_id >> 32);
+    u32 low = static_cast<u32>(program_id & 0xFFFFFFFF);
+    return Common::StringFromFormat("%s%08x/%08x/data/00000001/", mount_location.c_str(), high,
+                                    low);
+}
+
+std::string GetSaveDataMetadataPath(const std::string& mount_location, u64 program_id) {
+    u32 high = static_cast<u32>(program_id >> 32);
+    u32 low = static_cast<u32>(program_id & 0xFFFFFFFF);
+    return Common::StringFromFormat("%s%08x/%08x/data/00000001.metadata", mount_location.c_str(),
+                                    high, low);
+}
+
+} // namespace
+
+ArchiveSource_SDSaveData::ArchiveSource_SDSaveData(const std::string& sdmc_directory)
+    : mount_point(GetSaveDataContainerPath(sdmc_directory)) {
+    LOG_INFO(Service_FS, "Directory %s set as SaveData.", mount_point.c_str());
+}
+
+ResultVal<std::unique_ptr<ArchiveBackend>> ArchiveSource_SDSaveData::Open(u64 program_id) {
+    std::string concrete_mount_point = GetSaveDataPath(mount_point, program_id);
+    if (!FileUtil::Exists(concrete_mount_point)) {
+        // When a SaveData archive is created for the first time, it is not yet formatted and the
+        // save file/directory structure expected by the game has not yet been initialized.
+        // Returning the NotFormatted error code will signal the game to provision the SaveData
+        // archive with the files and folders that it expects.
+        return ResultCode(ErrorDescription::FS_NotFormatted, ErrorModule::FS,
+                          ErrorSummary::InvalidState, ErrorLevel::Status);
+    }
+
+    auto archive = std::make_unique<SaveDataArchive>(std::move(concrete_mount_point));
+    return MakeResult<std::unique_ptr<ArchiveBackend>>(std::move(archive));
+}
+
+ResultCode ArchiveSource_SDSaveData::Format(u64 program_id,
+                                            const FileSys::ArchiveFormatInfo& format_info) {
+    std::string concrete_mount_point = GetSaveDataPath(mount_point, program_id);
+    FileUtil::DeleteDirRecursively(concrete_mount_point);
+    FileUtil::CreateFullPath(concrete_mount_point);
+
+    // Write the format metadata
+    std::string metadata_path = GetSaveDataMetadataPath(mount_point, program_id);
+    FileUtil::IOFile file(metadata_path, "wb");
+
+    if (file.IsOpen()) {
+        file.WriteBytes(&format_info, sizeof(format_info));
+        return RESULT_SUCCESS;
+    }
+    return RESULT_SUCCESS;
+}
+
+ResultVal<ArchiveFormatInfo> ArchiveSource_SDSaveData::GetFormatInfo(u64 program_id) const {
+    std::string metadata_path = GetSaveDataMetadataPath(mount_point, program_id);
+    FileUtil::IOFile file(metadata_path, "rb");
+
+    if (!file.IsOpen()) {
+        LOG_ERROR(Service_FS, "Could not open metadata information for archive");
+        // TODO(Subv): Verify error code
+        return ResultCode(ErrorDescription::FS_NotFormatted, ErrorModule::FS,
+                          ErrorSummary::InvalidState, ErrorLevel::Status);
+    }
+
+    ArchiveFormatInfo info = {};
+    file.ReadBytes(&info, sizeof(info));
+    return MakeResult<ArchiveFormatInfo>(info);
+}
+
+} // namespace FileSys
diff --git a/src/core/file_sys/archive_source_sd_savedata.h b/src/core/file_sys/archive_source_sd_savedata.h
new file mode 100644
index 000000000..b33126c31
--- /dev/null
+++ b/src/core/file_sys/archive_source_sd_savedata.h
@@ -0,0 +1,30 @@
+// Copyright 2016 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <memory>
+#include <string>
+#include "core/file_sys/archive_backend.h"
+#include "core/hle/result.h"
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+// FileSys namespace
+
+namespace FileSys {
+
+/// A common source of SD save data archive
+class ArchiveSource_SDSaveData {
+public:
+    explicit ArchiveSource_SDSaveData(const std::string& mount_point);
+
+    ResultVal<std::unique_ptr<ArchiveBackend>> Open(u64 program_id);
+    ResultCode Format(u64 program_id, const FileSys::ArchiveFormatInfo& format_info);
+    ResultVal<ArchiveFormatInfo> GetFormatInfo(u64 program_id) const;
+
+private:
+    std::string mount_point;
+};
+
+} // namespace FileSys
diff --git a/src/core/hle/service/fs/archive.cpp b/src/core/hle/service/fs/archive.cpp
index 4c29784e8..a067e9262 100644
--- a/src/core/hle/service/fs/archive.cpp
+++ b/src/core/hle/service/fs/archive.cpp
@@ -535,7 +535,8 @@ void RegisterArchiveTypes() {
                   sdmc_directory.c_str());
 
     // Create the SaveData archive
-    auto savedata_factory = std::make_unique<FileSys::ArchiveFactory_SaveData>(sdmc_directory);
+    auto sd_savedata_source = std::make_shared<FileSys::ArchiveSource_SDSaveData>(sdmc_directory);
+    auto savedata_factory = std::make_unique<FileSys::ArchiveFactory_SaveData>(sd_savedata_source);
     RegisterArchiveType(std::move(savedata_factory), ArchiveIdCode::SaveData);
 
     auto extsavedata_factory =