pollymc/launcher/translations/TranslationsModel.cpp

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#include "TranslationsModel.h"
#include <QCoreApplication>
#include <QTranslator>
#include <QLocale>
#include <QDir>
#include <QLibraryInfo>
#include <QDebug>
#include "FileSystem.h"
#include "net/NetJob.h"
#include "net/ChecksumValidator.h"
#include "BuildConfig.h"
#include "Json.h"
#include "POTranslator.h"
#include "Application.h"
const static QLatin1Literal defaultLangCode("en_US");
enum class FileType
{
NONE,
QM,
PO
};
struct Language
{
Language()
{
updated = true;
}
Language(const QString & _key)
{
key = _key;
locale = QLocale(key);
updated = (key == defaultLangCode);
}
QString languageName() const {
QString result;
if(key == "ja_KANJI") {
result = locale.nativeLanguageName() + u8" (漢字)";
}
else if(key == "es_UY") {
result = u8"español de Latinoamérica";
}
else {
result = locale.nativeLanguageName();
}
return result;
}
float percentTranslated() const
{
if (total == 0)
{
return 100.0f;
}
return 100.0f * float(translated) / float(total);
}
void setTranslationStats(unsigned _translated, unsigned _untranslated, unsigned _fuzzy)
{
translated = _translated;
untranslated = _untranslated;
fuzzy = _fuzzy;
total = translated + untranslated + fuzzy;
}
bool isOfSameNameAs(const Language& other) const
{
return key == other.key;
}
bool isIdenticalTo(const Language& other) const
{
return
(
key == other.key &&
file_name == other.file_name &&
file_size == other.file_size &&
file_sha1 == other.file_sha1 &&
translated == other.translated &&
fuzzy == other.fuzzy &&
total == other.fuzzy &&
localFileType == other.localFileType
);
}
Language & apply(Language & other)
{
if(!isOfSameNameAs(other))
{
return *this;
}
file_name = other.file_name;
file_size = other.file_size;
file_sha1 = other.file_sha1;
translated = other.translated;
fuzzy = other.fuzzy;
total = other.total;
localFileType = other.localFileType;
return *this;
}
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QString key;
QLocale locale;
bool updated;
QString file_name = QString();
std::size_t file_size = 0;
QString file_sha1 = QString();
unsigned translated = 0;
unsigned untranslated = 0;
unsigned fuzzy = 0;
unsigned total = 0;
FileType localFileType = FileType::NONE;
};
struct TranslationsModel::Private
{
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QDir m_dir;
// initial state is just english
QVector<Language> m_languages = {Language (defaultLangCode)};
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QString m_selectedLanguage = defaultLangCode;
std::unique_ptr<QTranslator> m_qt_translator;
std::unique_ptr<QTranslator> m_app_translator;
Net::Download::Ptr m_index_task;
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QString m_downloadingTranslation;
NetJob::Ptr m_dl_job;
NetJob::Ptr m_index_job;
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QString m_nextDownload;
std::unique_ptr<POTranslator> m_po_translator;
QFileSystemWatcher *watcher;
};
TranslationsModel::TranslationsModel(QString path, QObject* parent): QAbstractListModel(parent)
{
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d.reset(new Private);
d->m_dir.setPath(path);
FS::ensureFolderPathExists(path);
reloadLocalFiles();
d->watcher = new QFileSystemWatcher(this);
connect(d->watcher, &QFileSystemWatcher::directoryChanged, this, &TranslationsModel::translationDirChanged);
d->watcher->addPath(d->m_dir.canonicalPath());
}
TranslationsModel::~TranslationsModel()
{
}
void TranslationsModel::translationDirChanged(const QString& path)
{
qDebug() << "Dir changed:" << path;
reloadLocalFiles();
selectLanguage(selectedLanguage());
}
void TranslationsModel::indexReceived()
{
qDebug() << "Got translations index!";
d->m_index_job.reset();
if(d->m_selectedLanguage != defaultLangCode)
{
downloadTranslation(d->m_selectedLanguage);
}
}
namespace {
void readIndex(const QString & path, QMap<QString, Language>& languages)
{
QByteArray data;
try
{
data = FS::read(path);
}
catch (const Exception &e)
{
qCritical() << "Translations Download Failed: index file not readable";
return;
}
int index = 1;
try
{
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auto toplevel_doc = Json::requireDocument(data);
auto doc = Json::requireObject(toplevel_doc);
auto file_type = Json::requireString(doc, "file_type");
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if(file_type != "MMC-TRANSLATION-INDEX")
{
qCritical() << "Translations Download Failed: index file is of unknown file type" << file_type;
return;
}
auto version = Json::requireInteger(doc, "version");
if(version > 2)
{
qCritical() << "Translations Download Failed: index file is of unknown format version" << file_type;
return;
}
auto langObjs = Json::requireObject(doc, "languages");
for(auto iter = langObjs.begin(); iter != langObjs.end(); iter++)
{
Language lang(iter.key());
auto langObj = Json::requireObject(iter.value());
lang.setTranslationStats(
Json::ensureInteger(langObj, "translated", 0),
Json::ensureInteger(langObj, "untranslated", 0),
Json::ensureInteger(langObj, "fuzzy", 0)
);
lang.file_name = Json::requireString(langObj, "file");
lang.file_sha1 = Json::requireString(langObj, "sha1");
lang.file_size = Json::requireInteger(langObj, "size");
languages.insert(lang.key, lang);
index++;
}
}
catch (Json::JsonException & e)
{
qCritical() << "Translations Download Failed: index file could not be parsed as json";
}
}
}
void TranslationsModel::reloadLocalFiles()
{
QMap<QString, Language> languages = {{defaultLangCode, Language(defaultLangCode)}};
readIndex(d->m_dir.absoluteFilePath("index_v2.json"), languages);
auto entries = d->m_dir.entryInfoList({"mmc_*.qm", "*.po"}, QDir::Files | QDir::NoDotAndDotDot);
for(auto & entry: entries)
{
auto completeSuffix = entry.completeSuffix();
QString langCode;
FileType fileType = FileType::NONE;
if(completeSuffix == "qm")
{
langCode = entry.baseName().remove(0,4);
fileType = FileType::QM;
}
else if(completeSuffix == "po")
{
langCode = entry.baseName();
fileType = FileType::PO;
}
else
{
continue;
}
auto langIter = languages.find(langCode);
if(langIter != languages.end())
{
auto & language = *langIter;
if(int(fileType) > int(language.localFileType))
{
language.localFileType = fileType;
}
}
else
{
if(fileType == FileType::PO)
{
Language localFound(langCode);
localFound.localFileType = FileType::PO;
languages.insert(langCode, localFound);
}
}
}
// changed and removed languages
for(auto iter = d->m_languages.begin(); iter != d->m_languages.end();)
{
auto &language = *iter;
auto row = iter - d->m_languages.begin();
auto updatedLanguageIter = languages.find(language.key);
if(updatedLanguageIter != languages.end())
{
if(language.isIdenticalTo(*updatedLanguageIter))
{
languages.remove(language.key);
}
else
{
language.apply(*updatedLanguageIter);
emit dataChanged(index(row), index(row));
languages.remove(language.key);
}
iter++;
}
else
{
beginRemoveRows(QModelIndex(), row, row);
iter = d->m_languages.erase(iter);
endRemoveRows();
}
}
// added languages
if(languages.isEmpty())
{
return;
}
beginInsertRows(QModelIndex(), 0, d->m_languages.size() + languages.size() - 1);
for(auto & language: languages)
{
d->m_languages.append(language);
}
std::sort(d->m_languages.begin(), d->m_languages.end(), [](const Language& a, const Language& b) {
return a.key.compare(b.key) < 0;
});
endInsertRows();
}
namespace {
enum class Column
{
Language,
Completeness
};
}
QVariant TranslationsModel::data(const QModelIndex& index, int role) const
{
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if (!index.isValid())
return QVariant();
int row = index.row();
auto column = static_cast<Column>(index.column());
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if (row < 0 || row >= d->m_languages.size())
return QVariant();
auto & lang = d->m_languages[row];
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switch (role)
{
case Qt::DisplayRole:
{
switch(column)
{
case Column::Language:
{
return lang.languageName();
}
case Column::Completeness:
{
QString text;
text.sprintf("%3.1f %%", lang.percentTranslated());
return text;
}
}
}
case Qt::ToolTipRole:
{
return tr("%1:\n%2 translated\n%3 fuzzy\n%4 total").arg(lang.key, QString::number(lang.translated), QString::number(lang.fuzzy), QString::number(lang.total));
}
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case Qt::UserRole:
return lang.key;
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default:
return QVariant();
}
}
QVariant TranslationsModel::headerData(int section, Qt::Orientation orientation, int role) const
{
auto column = static_cast<Column>(section);
if(role == Qt::DisplayRole)
{
switch(column)
{
case Column::Language:
{
return tr("Language");
}
case Column::Completeness:
{
return tr("Completeness");
}
}
}
else if(role == Qt::ToolTipRole)
{
switch(column)
{
case Column::Language:
{
return tr("The native language name.");
}
case Column::Completeness:
{
return tr("Completeness is the percentage of fully translated strings, not counting automatically guessed ones.");
}
}
}
return QAbstractListModel::headerData(section, orientation, role);
}
int TranslationsModel::rowCount(const QModelIndex& parent) const
{
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return d->m_languages.size();
}
int TranslationsModel::columnCount(const QModelIndex& parent) const
{
return 2;
}
Language * TranslationsModel::findLanguage(const QString& key)
{
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auto found = std::find_if(d->m_languages.begin(), d->m_languages.end(), [&](Language & lang)
{
return lang.key == key;
});
if(found == d->m_languages.end())
{
return nullptr;
}
else
{
return found;
}
}
bool TranslationsModel::selectLanguage(QString key)
{
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QString &langCode = key;
auto langPtr = findLanguage(key);
if(!langPtr)
{
qWarning() << "Selected invalid language" << key << ", defaulting to" << defaultLangCode;
langCode = defaultLangCode;
}
else
{
langCode = langPtr->key;
}
// uninstall existing translators if there are any
if (d->m_app_translator)
{
QCoreApplication::removeTranslator(d->m_app_translator.get());
d->m_app_translator.reset();
}
if (d->m_qt_translator)
{
QCoreApplication::removeTranslator(d->m_qt_translator.get());
d->m_qt_translator.reset();
}
/*
* FIXME: potential source of crashes:
* In a multithreaded application, the default locale should be set at application startup, before any non-GUI threads are created.
* This function is not reentrant.
*/
QLocale locale = QLocale(langCode);
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QLocale::setDefault(locale);
// if it's the default UI language, finish
if(langCode == defaultLangCode)
{
d->m_selectedLanguage = langCode;
return true;
}
// otherwise install new translations
bool successful = false;
// FIXME: this is likely never present. FIX IT.
d->m_qt_translator.reset(new QTranslator());
if (d->m_qt_translator->load("qt_" + langCode, QLibraryInfo::location(QLibraryInfo::TranslationsPath)))
{
qDebug() << "Loading Qt Language File for" << langCode.toLocal8Bit().constData() << "...";
if (!QCoreApplication::installTranslator(d->m_qt_translator.get()))
{
qCritical() << "Loading Qt Language File failed.";
d->m_qt_translator.reset();
}
else
{
successful = true;
}
}
else
{
d->m_qt_translator.reset();
}
if(langPtr->localFileType == FileType::PO)
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{
qDebug() << "Loading Application Language File for" << langCode.toLocal8Bit().constData() << "...";
auto poTranslator = new POTranslator(FS::PathCombine(d->m_dir.path(), langCode + ".po"));
if(!poTranslator->isEmpty())
{
if (!QCoreApplication::installTranslator(poTranslator))
{
delete poTranslator;
qCritical() << "Installing Application Language File failed.";
}
else
{
d->m_app_translator.reset(poTranslator);
successful = true;
}
}
else
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{
qCritical() << "Loading Application Language File failed.";
d->m_app_translator.reset();
}
}
else if(langPtr->localFileType == FileType::QM)
{
d->m_app_translator.reset(new QTranslator());
if (d->m_app_translator->load("mmc_" + langCode, d->m_dir.path()))
{
qDebug() << "Loading Application Language File for" << langCode.toLocal8Bit().constData() << "...";
if (!QCoreApplication::installTranslator(d->m_app_translator.get()))
{
qCritical() << "Installing Application Language File failed.";
d->m_app_translator.reset();
}
else
{
successful = true;
}
}
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else
{
d->m_app_translator.reset();
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}
}
else
{
d->m_app_translator.reset();
}
d->m_selectedLanguage = langCode;
return successful;
}
QModelIndex TranslationsModel::selectedIndex()
{
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auto found = findLanguage(d->m_selectedLanguage);
if(found)
{
// QVector iterator freely converts to pointer to contained type
return index(found - d->m_languages.begin(), 0, QModelIndex());
}
return QModelIndex();
}
QString TranslationsModel::selectedLanguage()
{
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return d->m_selectedLanguage;
}
void TranslationsModel::downloadIndex()
{
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if(d->m_index_job || d->m_dl_job)
{
return;
}
qDebug() << "Downloading Translations Index...";
d->m_index_job.reset(new NetJob("Translations Index"));
MetaEntryPtr entry = APPLICATION->metacache()->resolveEntry("translations", "index_v2.json");
entry->setStale(true);
d->m_index_task = Net::Download::makeCached(QUrl("https://files.multimc.org/translations/index_v2.json"), entry);
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d->m_index_job->addNetAction(d->m_index_task);
connect(d->m_index_job.get(), &NetJob::failed, this, &TranslationsModel::indexFailed);
connect(d->m_index_job.get(), &NetJob::succeeded, this, &TranslationsModel::indexReceived);
d->m_index_job->start(APPLICATION->network());
}
void TranslationsModel::updateLanguage(QString key)
{
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if(key == defaultLangCode)
{
qWarning() << "Cannot update builtin language" << key;
return;
}
auto found = findLanguage(key);
if(!found)
{
qWarning() << "Cannot update invalid language" << key;
return;
}
if(!found->updated)
{
downloadTranslation(key);
}
}
void TranslationsModel::downloadTranslation(QString key)
{
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if(d->m_dl_job)
{
d->m_nextDownload = key;
return;
}
auto lang = findLanguage(key);
if(!lang)
{
qWarning() << "Will not download an unknown translation" << key;
return;
}
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d->m_downloadingTranslation = key;
MetaEntryPtr entry = APPLICATION->metacache()->resolveEntry("translations", "mmc_" + key + ".qm");
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entry->setStale(true);
auto dl = Net::Download::makeCached(QUrl(BuildConfig.TRANSLATIONS_BASE_URL + lang->file_name), entry);
auto rawHash = QByteArray::fromHex(lang->file_sha1.toLatin1());
dl->addValidator(new Net::ChecksumValidator(QCryptographicHash::Sha1, rawHash));
dl->m_total_progress = lang->file_size;
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d->m_dl_job.reset(new NetJob("Translation for " + key));
d->m_dl_job->addNetAction(dl);
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connect(d->m_dl_job.get(), &NetJob::succeeded, this, &TranslationsModel::dlGood);
connect(d->m_dl_job.get(), &NetJob::failed, this, &TranslationsModel::dlFailed);
d->m_dl_job->start(APPLICATION->network());
}
void TranslationsModel::downloadNext()
{
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if(!d->m_nextDownload.isEmpty())
{
downloadTranslation(d->m_nextDownload);
d->m_nextDownload.clear();
}
}
void TranslationsModel::dlFailed(QString reason)
{
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qCritical() << "Translations Download Failed:" << reason;
d->m_dl_job.reset();
downloadNext();
}
void TranslationsModel::dlGood()
{
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qDebug() << "Got translation:" << d->m_downloadingTranslation;
if(d->m_downloadingTranslation == d->m_selectedLanguage)
{
selectLanguage(d->m_selectedLanguage);
}
d->m_dl_job.reset();
downloadNext();
}
void TranslationsModel::indexFailed(QString reason)
{
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qCritical() << "Translations Index Download Failed:" << reason;
d->m_index_job.reset();
}