13 files changed, 130 insertions, 14 deletions
diff --git a/src/core/file_sys/archive_backend.h b/src/core/file_sys/archive_backend.h
index 60108b4b0..800ac1541 100644
--- a/src/core/file_sys/archive_backend.h
+++ b/src/core/file_sys/archive_backend.h
@@ -62,6 +62,14 @@ private:
     std::u16string u16str;
 };
 
+struct ArchiveFormatInfo {
+    u32 total_size; ///< The pre-defined size of the archive, as specified in the Create or Format call
+    u32 number_directories; ///< The pre-defined number of directories in the archive, as specified in the Create or Format call
+    u32 number_files; ///< The pre-defined number of files in the archive, as specified in the Create or Format call
+    u8 duplicate_data; ///< Whether the archive should duplicate the data, as specified in the Create or Format call
+};
+static_assert(std::is_pod<ArchiveFormatInfo>::value, "ArchiveFormatInfo is not POD");
+
 class ArchiveBackend : NonCopyable {
 public:
     virtual ~ArchiveBackend() {
@@ -159,9 +167,17 @@ public:
     /**
      * Deletes the archive contents and then re-creates the base folder
      * @param path Path to the archive
+     * @param format_info Format information for the new archive
      * @return ResultCode of the operation, 0 on success
      */
-    virtual ResultCode Format(const Path& path) = 0;
+    virtual ResultCode Format(const Path& path, const FileSys::ArchiveFormatInfo& format_info) = 0;
+
+    /*
+     * Retrieves the format info about the archive with the specified path
+     * @param path Path to the archive
+     * @return Format information about the archive or error code
+     */
+    virtual ResultVal<ArchiveFormatInfo> GetFormatInfo(const Path& path) const = 0;
 };
 
 } // namespace FileSys
diff --git a/src/core/file_sys/archive_extsavedata.cpp b/src/core/file_sys/archive_extsavedata.cpp
index 92dad8e6f..e83a6153d 100644
--- a/src/core/file_sys/archive_extsavedata.cpp
+++ b/src/core/file_sys/archive_extsavedata.cpp
@@ -82,13 +82,45 @@ ResultVal<std::unique_ptr<ArchiveBackend>> ArchiveFactory_ExtSaveData::Open(cons
     return MakeResult<std::unique_ptr<ArchiveBackend>>(std::move(archive));
 }
 
-ResultCode ArchiveFactory_ExtSaveData::Format(const Path& path) {
+ResultCode ArchiveFactory_ExtSaveData::Format(const Path& path, const FileSys::ArchiveFormatInfo& format_info) {
     // These folders are always created with the ExtSaveData
     std::string user_path = GetExtSaveDataPath(mount_point, path) + "user/";
     std::string boss_path = GetExtSaveDataPath(mount_point, path) + "boss/";
     FileUtil::CreateFullPath(user_path);
     FileUtil::CreateFullPath(boss_path);
-    return RESULT_SUCCESS;
+
+    // Write the format metadata
+    std::string metadata_path = GetExtSaveDataPath(mount_point, path) + "metadata";
+    FileUtil::IOFile file(metadata_path, "wb");
+
+    if (file.IsOpen()) {
+        file.WriteBytes(&format_info, sizeof(format_info));
+        return RESULT_SUCCESS;
+    }
+
+    // TODO(Subv): Find the correct error code
+    return ResultCode(-1);
+}
+
+ResultVal<ArchiveFormatInfo> ArchiveFactory_ExtSaveData::GetFormatInfo(const Path& path) const {
+    std::string metadata_path = GetExtSaveDataPath(mount_point, path) + "metadata";
+    FileUtil::IOFile file(metadata_path, "rb");
+
+    if (file.IsOpen()) {
+        ArchiveFormatInfo info;
+        file.ReadBytes(&info, sizeof(info));
+        return MakeResult<ArchiveFormatInfo>(info);
+    }
+
+    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);
+}
+
+void ArchiveFactory_ExtSaveData::WriteIcon(const Path& path, u8* icon_data, u32 icon_size) {
+    std::string game_path = FileSys::GetExtSaveDataPath(GetMountPoint(), path);
+    FileUtil::IOFile icon_file(game_path + "icon", "wb+");
+    icon_file.WriteBytes(icon_data, icon_size);
 }
 
 } // namespace FileSys
diff --git a/src/core/file_sys/archive_extsavedata.h b/src/core/file_sys/archive_extsavedata.h
index ec8d770fc..48e092ee7 100644
--- a/src/core/file_sys/archive_extsavedata.h
+++ b/src/core/file_sys/archive_extsavedata.h
@@ -31,10 +31,19 @@ public:
     std::string GetName() const override { return "ExtSaveData"; }
 
     ResultVal<std::unique_ptr<ArchiveBackend>> Open(const Path& path) override;
-    ResultCode Format(const Path& path) override;
+    ResultCode Format(const Path& path, const FileSys::ArchiveFormatInfo& format_info) override;
+    ResultVal<ArchiveFormatInfo> GetFormatInfo(const Path& path) const override;
 
     const std::string& GetMountPoint() const { return mount_point; }
 
+    /*
+     * Writes the SMDH icon of the ExtSaveData to file
+     * @param path Path of this ExtSaveData
+     * @param icon_data Binary data of the icon
+     * @param icon_size Size of the icon data
+     */
+    void WriteIcon(const Path& path, u8* icon_data, u32 icon_size);
+
 private:
     /**
      * This holds the full directory path for this archive, it is only set after a successful call
diff --git a/src/core/file_sys/archive_romfs.cpp b/src/core/file_sys/archive_romfs.cpp
index 696b51a94..a9a29ebde 100644
--- a/src/core/file_sys/archive_romfs.cpp
+++ b/src/core/file_sys/archive_romfs.cpp
@@ -29,11 +29,17 @@ ResultVal<std::unique_ptr<ArchiveBackend>> ArchiveFactory_RomFS::Open(const Path
     return MakeResult<std::unique_ptr<ArchiveBackend>>(std::move(archive));
 }
 
-ResultCode ArchiveFactory_RomFS::Format(const Path& path) {
+ResultCode ArchiveFactory_RomFS::Format(const Path& path, const FileSys::ArchiveFormatInfo& format_info) {
     LOG_ERROR(Service_FS, "Attempted to format a RomFS archive.");
     // TODO: Verify error code
     return ResultCode(ErrorDescription::NotAuthorized, ErrorModule::FS,
             ErrorSummary::NotSupported, ErrorLevel::Permanent);
 }
 
+ResultVal<ArchiveFormatInfo> ArchiveFactory_RomFS::GetFormatInfo(const Path& path) const {
+    // TODO(Subv): Implement
+    LOG_ERROR(Service_FS, "Unimplemented GetFormatInfo archive %s", GetName().c_str());
+    return ResultCode(-1);
+}
+
 } // namespace FileSys
diff --git a/src/core/file_sys/archive_romfs.h b/src/core/file_sys/archive_romfs.h
index 2bedfa9c6..c5a329122 100644
--- a/src/core/file_sys/archive_romfs.h
+++ b/src/core/file_sys/archive_romfs.h
@@ -26,7 +26,8 @@ public:
 
     std::string GetName() const override { return "RomFS"; }
     ResultVal<std::unique_ptr<ArchiveBackend>> Open(const Path& path) override;
-    ResultCode Format(const Path& path) override;
+    ResultCode Format(const Path& path, const FileSys::ArchiveFormatInfo& format_info) override;
+    ResultVal<ArchiveFormatInfo> GetFormatInfo(const Path& path) const override;
 
 private:
     std::shared_ptr<FileUtil::IOFile> romfs_file;
diff --git a/src/core/file_sys/archive_savedata.cpp b/src/core/file_sys/archive_savedata.cpp
index 12876899f..82f49af5d 100644
--- a/src/core/file_sys/archive_savedata.cpp
+++ b/src/core/file_sys/archive_savedata.cpp
@@ -31,6 +31,12 @@ static std::string GetSaveDataPath(const std::string& mount_location, u64 progra
     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 = program_id >> 32;
+    u32 low = 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());
@@ -51,11 +57,35 @@ ResultVal<std::unique_ptr<ArchiveBackend>> ArchiveFactory_SaveData::Open(const P
     return MakeResult<std::unique_ptr<ArchiveBackend>>(std::move(archive));
 }
 
-ResultCode ArchiveFactory_SaveData::Format(const Path& path) {
+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;
 }
 
+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()) {
+        ArchiveFormatInfo info;
+        file.ReadBytes(&info, sizeof(info));
+        return MakeResult<ArchiveFormatInfo>(info);
+    }
+
+    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);
+}
+
 } // namespace FileSys
diff --git a/src/core/file_sys/archive_savedata.h b/src/core/file_sys/archive_savedata.h
index 1f65297dd..7a5a24089 100644
--- a/src/core/file_sys/archive_savedata.h
+++ b/src/core/file_sys/archive_savedata.h
@@ -23,7 +23,9 @@ public:
     std::string GetName() const override { return "SaveData"; }
 
     ResultVal<std::unique_ptr<ArchiveBackend>> Open(const Path& path) override;
-    ResultCode Format(const Path& path) override;
+    ResultCode Format(const Path& path, const FileSys::ArchiveFormatInfo& format_info) override;
+
+    ResultVal<ArchiveFormatInfo> GetFormatInfo(const Path& path) const override;
 
 private:
     std::string mount_point;
diff --git a/src/core/file_sys/archive_savedatacheck.cpp b/src/core/file_sys/archive_savedatacheck.cpp
index ea1dfe2c7..3db11c500 100644
--- a/src/core/file_sys/archive_savedatacheck.cpp
+++ b/src/core/file_sys/archive_savedatacheck.cpp
@@ -48,11 +48,17 @@ ResultVal<std::unique_ptr<ArchiveBackend>> ArchiveFactory_SaveDataCheck::Open(co
     return MakeResult<std::unique_ptr<ArchiveBackend>>(std::move(archive));
 }
 
-ResultCode ArchiveFactory_SaveDataCheck::Format(const Path& path) {
+ResultCode ArchiveFactory_SaveDataCheck::Format(const Path& path, const FileSys::ArchiveFormatInfo& format_info) {
     LOG_ERROR(Service_FS, "Attempted to format a SaveDataCheck archive.");
     // TODO: Verify error code
     return ResultCode(ErrorDescription::NotAuthorized, ErrorModule::FS,
         ErrorSummary::NotSupported, ErrorLevel::Permanent);
 }
 
+ResultVal<ArchiveFormatInfo> ArchiveFactory_SaveDataCheck::GetFormatInfo(const Path& path) const {
+    // TODO(Subv): Implement
+    LOG_ERROR(Service_FS, "Unimplemented GetFormatInfo archive %s", GetName().c_str());
+    return ResultCode(-1);
+}
+
 } // namespace FileSys
diff --git a/src/core/file_sys/archive_savedatacheck.h b/src/core/file_sys/archive_savedatacheck.h
index b14aefe8b..ea2624d64 100644
--- a/src/core/file_sys/archive_savedatacheck.h
+++ b/src/core/file_sys/archive_savedatacheck.h
@@ -23,7 +23,8 @@ public:
     std::string GetName() const override { return "SaveDataCheck"; }
 
     ResultVal<std::unique_ptr<ArchiveBackend>> Open(const Path& path) override;
-    ResultCode Format(const Path& path) override;
+    ResultCode Format(const Path& path, const FileSys::ArchiveFormatInfo& format_info) override;
+    ResultVal<ArchiveFormatInfo> GetFormatInfo(const Path& path) const override;
 
 private:
     std::string mount_point;
diff --git a/src/core/file_sys/archive_sdmc.cpp b/src/core/file_sys/archive_sdmc.cpp
index 5c825f429..657221cbf 100644
--- a/src/core/file_sys/archive_sdmc.cpp
+++ b/src/core/file_sys/archive_sdmc.cpp
@@ -40,9 +40,14 @@ ResultVal<std::unique_ptr<ArchiveBackend>> ArchiveFactory_SDMC::Open(const Path&
     return MakeResult<std::unique_ptr<ArchiveBackend>>(std::move(archive));
 }
 
-ResultCode ArchiveFactory_SDMC::Format(const Path& path) {
+ResultCode ArchiveFactory_SDMC::Format(const Path& path, const FileSys::ArchiveFormatInfo& format_info) {
     // This is kind of an undesirable operation, so let's just ignore it. :)
     return RESULT_SUCCESS;
 }
 
+ResultVal<ArchiveFormatInfo> ArchiveFactory_SDMC::GetFormatInfo(const Path& path) const {
+    // TODO(Subv): Implement
+    LOG_ERROR(Service_FS, "Unimplemented GetFormatInfo archive %s", GetName().c_str());
+    return ResultCode(-1);
+}
 } // namespace FileSys
diff --git a/src/core/file_sys/archive_sdmc.h b/src/core/file_sys/archive_sdmc.h
index 10b273bdb..35c0f3725 100644
--- a/src/core/file_sys/archive_sdmc.h
+++ b/src/core/file_sys/archive_sdmc.h
@@ -29,7 +29,8 @@ public:
     std::string GetName() const override { return "SDMC"; }
 
     ResultVal<std::unique_ptr<ArchiveBackend>> Open(const Path& path) override;
-    ResultCode Format(const Path& path) override;
+    ResultCode Format(const Path& path, const FileSys::ArchiveFormatInfo& format_info) override;
+    ResultVal<ArchiveFormatInfo> GetFormatInfo(const Path& path) const override;
 
 private:
     std::string sdmc_directory;
diff --git a/src/core/file_sys/archive_systemsavedata.cpp b/src/core/file_sys/archive_systemsavedata.cpp
index 896f89529..e1780de2f 100644
--- a/src/core/file_sys/archive_systemsavedata.cpp
+++ b/src/core/file_sys/archive_systemsavedata.cpp
@@ -63,11 +63,17 @@ ResultVal<std::unique_ptr<ArchiveBackend>> ArchiveFactory_SystemSaveData::Open(c
     return MakeResult<std::unique_ptr<ArchiveBackend>>(std::move(archive));
 }
 
-ResultCode ArchiveFactory_SystemSaveData::Format(const Path& path) {
+ResultCode ArchiveFactory_SystemSaveData::Format(const Path& path, const FileSys::ArchiveFormatInfo& format_info) {
     std::string fullpath = GetSystemSaveDataPath(base_path, path);
     FileUtil::DeleteDirRecursively(fullpath);
     FileUtil::CreateFullPath(fullpath);
     return RESULT_SUCCESS;
 }
 
+ResultVal<ArchiveFormatInfo> ArchiveFactory_SystemSaveData::GetFormatInfo(const Path& path) const {
+    // TODO(Subv): Implement
+    LOG_ERROR(Service_FS, "Unimplemented GetFormatInfo archive %s", GetName().c_str());
+    return ResultCode(-1);
+}
+
 } // namespace FileSys
diff --git a/src/core/file_sys/archive_systemsavedata.h b/src/core/file_sys/archive_systemsavedata.h
index afc689848..2bc13d4ee 100644
--- a/src/core/file_sys/archive_systemsavedata.h
+++ b/src/core/file_sys/archive_systemsavedata.h
@@ -23,7 +23,8 @@ public:
     ArchiveFactory_SystemSaveData(const std::string& mount_point);
 
     ResultVal<std::unique_ptr<ArchiveBackend>> Open(const Path& path) override;
-    ResultCode Format(const Path& path) override;
+    ResultCode Format(const Path& path, const FileSys::ArchiveFormatInfo& format_info) override;
+    ResultVal<ArchiveFormatInfo> GetFormatInfo(const Path& path) const override;
 
     std::string GetName() const override { return "SystemSaveData"; }