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#include "archive.hpp"
#include "main_window.hpp"
#include <algorithm>
namespace getsuyomi {
ZipArchive::ZipArchive(const QString& filename)
{
auto filenameUtf8 = filename.toUtf8();
qDebug("Open file %s", filenameUtf8.data());
int err;
m_archive = zip_open(filenameUtf8.data(), 0, &err);
if (m_archive == nullptr) {
zip_error_t error;
zip_error_init_with_code(&error, err);
qCritical("%s: cannot open zip archive '%s': %s", AppName, filenameUtf8.data(), zip_error_strerror(&error));
zip_error_fini(&error);
throw std::runtime_error("Bad zip file");
}
populate();
}
void ZipArchive::populate()
{
auto numEntries = zip_get_num_entries(m_archive, ZIP_FL_UNCHANGED);
qDebug("%zu pages", numEntries);
struct NameIndex {
std::string name;
size_t index;
size_t filesize;
};
std::vector<NameIndex> nameIndices{};
nameIndices.reserve(numEntries);
m_pages.reserve(numEntries);
for (size_t idx = 0; idx < numEntries; ++idx) {
struct zip_stat stats;
auto status = zip_stat_index(m_archive, idx, 0, &stats);
static_assert(ZIP_STAT_NAME != 0);
static_assert(ZIP_STAT_SIZE != 0);
static_assert(ZIP_STAT_INDEX != 0);
// auto* nameCString = zip_get_name(m_archive, idx, ZIP_FL_ENC_RAW);
auto* nameCString = stats.name;
if (nameCString == nullptr) {
zip_error_t* error = zip_get_error(m_archive);
qWarning("cannot get name %s", zip_error_strerror(error));
continue;
}
std::string name{nameCString};
if (name.empty() || name.back() == '/') {
qDebug("Directory %s", name.empty() ? "N/A" : nameCString);
continue;
}
nameIndices.emplace_back(NameIndex{name, idx, stats.size});
m_pages.emplace_back(std::nullopt);
}
std::sort(nameIndices.begin(), nameIndices.end(), [](const auto& lhs, const auto& rhs) {
return std::lexicographical_compare(lhs.name.begin(), lhs.name.end(), rhs.name.begin(), rhs.name.end());
});
m_sortedIndices.reserve(nameIndices.size());
m_filenames.reserve(nameIndices.size());
m_fileSizes.reserve(nameIndices.size());
for (const auto& nameIndex : nameIndices) {
m_sortedIndices.push_back(nameIndex.index);
m_filenames.push_back(nameIndex.name);
m_fileSizes.push_back(nameIndex.filesize);
}
}
ZipArchive::~ZipArchive()
{
if (m_archive != nullptr) {
zip_discard(m_archive);
m_archive = nullptr;
}
}
ArchiveResult ZipArchive::getPage(size_t page)
{
qDebug("Getting page %zu", page);
if (page > m_sortedIndices.size()) {
return ArchiveResult::error(ArchiveError::BadIndex);
}
if (m_pages[page] != std::nullopt) {
qDebug("Page found %zu", page);
return ArchiveResult::okay(std::cref(*m_pages[page]));
}
auto* file = zip_fopen_index(m_archive, m_sortedIndices[page], 0);
if (file == nullptr) {
zip_error_t* error = zip_get_error(m_archive);
qWarning("cannot get file name %s: %s", m_filenames[page].data(), zip_error_strerror(error));
return ArchiveResult::error(ArchiveError::ZipError);
}
QByteArray data;
data.resize(m_fileSizes[page]);
auto index = m_sortedIndices[page];
qDebug("Reading in page data");
auto bytesRead = zip_fread(file, data.data(), data.size());
zip_fclose(file);
file = nullptr;
if (bytesRead != data.size()) {
return ArchiveResult::error(ArchiveError::ZipError);
}
m_pages[page] = QImage();
qDebug("Loading QImage from page data");
auto loaded = m_pages[page]->loadFromData(data);
if (!loaded) {
qWarning("Failed to load QImage");
m_pages[page] = std::nullopt;
return ArchiveResult::error(ArchiveError::BadData);
}
return ArchiveResult::okay(std::cref(*m_pages[page]));
}
size_t ZipArchive::numPages() const {
return m_pages.size();
}
} // namespace getsuyomi
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