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#include "archive.hpp"
#include <algorithm>
#include <stdexcept>
namespace bookmouse {
ZipArchive::ZipArchive(const std::string& filename)
{
// qDebug("Open file %s", filename.data());
int err;
m_archive = zip_open(filename.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 numEntriesResult = zip_get_num_entries(m_archive, ZIP_FL_UNCHANGED);
if (numEntriesResult < 0) {
throw std::runtime_error("Invalid number of entries");
}
auto numEntries = static_cast<size_t>(numEntriesResult);
// 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);
if (status != 0) {
continue;
}
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;
}
}
ZipArchive::ZipArchive(ZipArchive&& rhs)
: m_archive{rhs.m_archive},
m_sortedIndices{std::move(rhs.m_sortedIndices)},
m_filenames{std::move(rhs.m_filenames)},
m_fileSizes{std::move(rhs.m_fileSizes)},
m_pages{std::move(rhs.m_pages)}
{
rhs.m_archive = nullptr;
}
ZipArchive& ZipArchive::operator=(ZipArchive&& rhs)
{
m_archive = rhs.m_archive;
m_sortedIndices = std::move(rhs.m_sortedIndices);
m_filenames = std::move(rhs.m_filenames);
m_fileSizes = std::move(rhs.m_fileSizes);
m_pages = std::move(rhs.m_pages);
rhs.m_archive = nullptr;
return *this;
}
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);
}
std::vector<char> data;
data.resize(m_fileSizes[page]);
// auto index = m_sortedIndices[page];
// qDebug("Reading in page data");
auto bytesReadResult = zip_fread(file, data.data(), data.size());
if (bytesReadResult < 0) {
return ArchiveResult::error(ArchiveError::ZipError);
}
zip_fclose(file);
file = nullptr;
auto bytesRead = static_cast<size_t>(bytesReadResult);
if (bytesRead != data.size()) {
return ArchiveResult::error(ArchiveError::ZipError);
}
m_pages[page] = data;
// 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 bookmouse
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