Translation class

kiwix-desktop.pro

@@ -46,6 +46,7 @@ DEFINES += QT_DEPRECATED_WARNINGS
 
 SOURCES += \
     src/findinpagebar.cpp \
+    src/translation.cpp \
     src/main.cpp \
     src/mainwindow.cpp \
     src/kiwixapp.cpp \
@@ -75,6 +76,7 @@ SOURCES += \
 
 HEADERS += \
     src/findinpagebar.h \
+    src/translation.h \
     src/mainwindow.h \
     src/kiwixapp.h \
     src/kprofile.h \

src/kiwixapp.cpp

@@ -24,6 +24,12 @@ KiwixApp::KiwixApp(int& argc, char *argv[])
         appendToDirectory(m_libraryDirectory.toStdString(),"library.xml"),
         m_settingsManager.getKiwixServerPort()))
 {
+    try {
+        m_translation.setTranslation(QLocale());
+    } catch (exception& e) {
+        QMessageBox::critical(nullptr, "Translation error", e.what());
+        return;
+    }
     m_qtTranslator.load(QLocale(), "qt", "_",
                         QLibraryInfo::location(QLibraryInfo::TranslationsPath));
     installTranslator(&m_qtTranslator);

src/translation.cpp

@@ -0,0 +1,51 @@
+#include "translation.h"
+#include <QFile>
+#include <QJsonDocument>
+#include <QJsonObject>
+#include <QDebug>
+
+Translation::Translation()
+{
+}
+
+void Translation::setTranslation(QLocale locale)
+{
+    auto defaultText = JsonFileToQMap(":/i18n/en.json");
+    if (defaultText.isEmpty()) {
+        throw std::runtime_error("Invalid translation file");
+    }
+    if (locale.bcp47Name() == "en") {
+        m_translations = defaultText;
+        return;
+    }
+    m_translations = JsonFileToQMap(":/i18n/" + locale.bcp47Name() + ".json");
+    for (auto &key : defaultText.keys()) {
+        if (!m_translations.contains(key) || m_translations.value(key).isEmpty()) {
+            m_translations.insert(key, defaultText.value(key));
+        }
+    }
+}
+
+QMap<QString, QString> Translation::JsonFileToQMap(const QString &filePath)
+{
+    QMap<QString, QString> translations;
+    QFile file(filePath);
+    if (!file.open(QIODevice::ReadOnly)) {
+        return translations;
+    }
+    QJsonDocument doc = QJsonDocument::fromJson(file.readAll());
+    file.close();
+    if (doc.isNull()) {
+        return translations;
+    }
+    auto jsonObj = doc.object();
+    for (auto &key : jsonObj.keys()) {
+        translations.insert(key, jsonObj.value(key).toString());
+    }
+    return translations;
+}
+
+QString Translation::getText(const QString &key)
+{
+    return (m_translations.contains(key)) ? m_translations.value(key) : key;
+}

src/translation.h

@@ -0,0 +1,23 @@
+#ifndef TRANSLATION_H
+#define TRANSLATION_H
+
+#include <QString>
+#include <QMap>
+#include <QLocale>
+
+class Translation
+{
+public:
+    Translation();
+
+    void setTranslation(QLocale locale);
+    QString getText(const QString &key);
+
+private:
+    QMap<QString, QString> JsonFileToQMap(const QString &filePath);
+
+private:
+    QMap<QString, QString> m_translations;
+};
+
+#endif // TRANSLATION_H