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Fr4nz D13trich 2025-11-22 13:58:55 +01:00
parent 4af19165ec
commit 68073add76
12458 changed files with 12350765 additions and 2 deletions
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68
libs/storage/diff_scheme/apply_diff.cpp Normal file
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#include "storage/diff_scheme/apply_diff.hpp"
#include "platform/platform.hpp"
#include "coding/internal/file_data.hpp"
#include "base/assert.hpp"
#include "base/cancellable.hpp"
namespace storage
{
namespace diffs
{
void ApplyDiff(ApplyDiffParams && p, base::Cancellable const & cancellable, OnDiffApplicationFinished const & task)
{
using namespace generator::mwm_diff;
GetPlatform().RunTask(Platform::Thread::File, [p = std::move(p), &cancellable, task]
{
CHECK(p.m_diffFile, ());
CHECK(p.m_oldMwmFile, ());
auto & diffReadyPath = p.m_diffReadyPath;
auto & diffFile = p.m_diffFile;
auto const diffPath = diffFile->GetPath(MapFileType::Diff);
auto result = DiffApplicationResult::Failed;
diffFile->SyncWithDisk();
if (!diffFile->OnDisk(MapFileType::Diff))
{
base::RenameFileX(diffReadyPath, diffPath);
diffFile->SyncWithDisk();
}
auto const isFilePrepared = diffFile->OnDisk(MapFileType::Diff);
if (isFilePrepared)
{
std::string const oldMwmPath = p.m_oldMwmFile->GetPath(MapFileType::Map);
std::string const newMwmPath = diffFile->GetPath(MapFileType::Map);
std::string const diffApplyingInProgressPath = newMwmPath + DIFF_APPLYING_FILE_EXTENSION;
result = generator::mwm_diff::ApplyDiff(oldMwmPath, diffApplyingInProgressPath, diffPath, cancellable);
if (result == DiffApplicationResult::Ok && !base::RenameFileX(diffApplyingInProgressPath, newMwmPath))
result = DiffApplicationResult::Failed;
Platform::RemoveFileIfExists(diffApplyingInProgressPath);
if (result != DiffApplicationResult::Ok)
Platform::RemoveFileIfExists(newMwmPath);
}
switch (result)
{
case DiffApplicationResult::Ok: diffFile->DeleteFromDisk(MapFileType::Diff); break;
case DiffApplicationResult::Cancelled:
// The diff file will be deleted by storage.
// Another way would be to leave it on disk but all consequences
// of interacting with storage are much harder to be taken into account that way.
break;
case DiffApplicationResult::Failed: diffFile->DeleteFromDisk(MapFileType::Diff); break;
}
GetPlatform().RunTask(Platform::Thread::Gui, [task, result]() { task(result); });
});
}
} // namespace diffs
} // namespace storage