Command line tool - basics

PdfTool/pdftoolabstractapplication.cpp

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+//    Copyright (C) 2020 Jakub Melka
+//
+//    This file is part of PdfForQt.
+//
+//    PdfForQt is free software: you can redistribute it and/or modify
+//    it under the terms of the GNU Lesser General Public License as published by
+//    the Free Software Foundation, either version 3 of the License, or
+//    (at your option) any later version.
+//
+//    PdfForQt is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//    GNU Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public License
+//    along with PDFForQt.  If not, see <https://www.gnu.org/licenses/>.
+
+#include "pdftoolabstractapplication.h"
+
+namespace pdftool
+{
+
+class PDFToolHelpApplication : public PDFToolAbstractApplication
+{
+public:
+    PDFToolHelpApplication() : PDFToolAbstractApplication(true) { }
+
+    virtual QString getStandardString(StandardString standardString) const override;
+    virtual int execute(const PDFToolOptions& options) override;
+};
+
+static PDFToolHelpApplication s_helpApplication;
+
+QString PDFToolHelpApplication::getStandardString(StandardString standardString) const
+{
+    switch (standardString)
+    {
+        case Command:
+            return "help";
+
+        case Name:
+            return PDFToolTranslationContext::tr("Help");
+
+        case Description:
+            return PDFToolTranslationContext::tr("Show list of all available commands.");
+
+        default:
+            Q_ASSERT(false);
+            break;
+    }
+
+    return QString();
+}
+
+int PDFToolHelpApplication::execute(const PDFToolOptions& options)
+{
+    return EXIT_SUCCESS;
+}
+
+PDFToolAbstractApplication::PDFToolAbstractApplication(bool isDefault)
+{
+    PDFToolApplicationStorage::registerApplication(this, isDefault);
+}
+
+void PDFToolAbstractApplication::initializeCommandLineParser(QCommandLineParser* parser) const
+{
+
+}
+
+PDFToolOptions PDFToolAbstractApplication::getOptions(QCommandLineParser* parser) const
+{
+    PDFToolOptions options;
+
+    return options;
+}
+
+PDFToolAbstractApplication* PDFToolApplicationStorage::getApplicationByCommand(const QString& command)
+{
+    for (PDFToolAbstractApplication* application : getInstance()->m_applications)
+    {
+        if (application->getStandardString(PDFToolAbstractApplication::Command) == command)
+        {
+            return application;
+        }
+    }
+
+    return nullptr;
+}
+
+void PDFToolApplicationStorage::registerApplication(PDFToolAbstractApplication* application, bool isDefault)
+{
+    PDFToolApplicationStorage* storage = getInstance();
+    storage->m_applications.push_back(application);
+
+    if (isDefault)
+    {
+        storage->m_defaultApplication = application;
+    }
+}
+
+PDFToolAbstractApplication* PDFToolApplicationStorage::getDefaultApplication()
+{
+    return getInstance()->m_defaultApplication;
+}
+
+PDFToolApplicationStorage* PDFToolApplicationStorage::getInstance()
+{
+    static PDFToolApplicationStorage storage;
+    return &storage;
+}
+
+}   // pdftool