[libcalamares] Start a 'presets' configuration datastructure

src/libcalamares/CMakeLists.txt

@@ -51,6 +51,7 @@ set( libSources
     modulesystem/Descriptor.cpp
     modulesystem/InstanceKey.cpp
     modulesystem/Module.cpp
+    modulesystem/Preset.cpp
     modulesystem/RequirementsChecker.cpp
     modulesystem/RequirementsModel.cpp
 

src/libcalamares/modulesystem/Preset.cpp

@@ -0,0 +1,49 @@
+/* === This file is part of Calamares - <https://calamares.io> ===
+ *
+ *   SPDX-FileCopyrightText: 2021 Adriaan de Groot <groot@kde.org>
+ *   SPDX-License-Identifier: GPL-3.0-or-later
+ *
+ *   Calamares is Free Software: see the License-Identifier above.
+ *
+ */
+
+#include "Preset.h"
+
+#include "utils/Logger.h"
+#include "utils/Variant.h"
+
+static void
+loadPresets( Calamares::ModuleSystem::Presets& preset,
+             const QVariantMap& configurationMap,
+             std::function< bool( const QString& ) > pred )
+{
+    cDebug() << "Creating presets" << preset.capacity();
+    for ( auto it = configurationMap.cbegin(); it != configurationMap.cend(); ++it )
+    {
+        if ( !it.key().isEmpty() && pred( it.key() ) )
+        {
+            QVariantMap m = it.value().toMap();
+            QString value = CalamaresUtils::getString( m, "value" );
+            bool editable = CalamaresUtils::getBool( m, "editable", true );
+
+            preset.append( Calamares::ModuleSystem::PresetField { it.key(), value, editable } );
+
+            cDebug() << Logger::SubEntry << "Preset for" << it.key() << "applied editable?" << editable;
+        }
+    }
+}
+
+Calamares::ModuleSystem::Presets::Presets( const QVariantMap& configurationMap )
+
+
+{
+    reserve( configurationMap.count() );
+    loadPresets( *this, configurationMap, []( const QString& ) { return true; } );
+}
+
+Calamares::ModuleSystem::Presets::Presets( const QVariantMap& configurationMap, const QStringList& recognizedKeys )
+{
+    reserve( recognizedKeys.size() );
+    loadPresets(
+        *this, configurationMap, [&recognizedKeys]( const QString& s ) { return recognizedKeys.contains( s ); } );
+}

src/libcalamares/modulesystem/Preset.h

@@ -0,0 +1,57 @@
+/* === This file is part of Calamares - <https://calamares.io> ===
+ *
+ *   SPDX-FileCopyrightText: 2021 Adriaan de Groot <groot@kde.org>
+ *   SPDX-License-Identifier: GPL-3.0-or-later
+ *
+ *   Calamares is Free Software: see the License-Identifier above.
+ *
+ */
+
+#ifndef CALAMARES_MODULESYSTEM_PRESET_H
+#define CALAMARES_MODULESYSTEM_PRESET_H
+
+#include <QString>
+#include <QVariantMap>
+#include <QVector>
+
+namespace Calamares
+{
+namespace ModuleSystem
+{
+/** @brief The settings for a single field
+ *
+ * The settings apply to a single field; **often** this will
+ * correspond to a single value or property of a Config
+ * object, but there is no guarantee of a correspondence
+ * between names here and names in the code.
+ *
+ * The value is stored as a string; consumers (e.g. the UI)
+ * will need to translate the value to whatever is actually
+ * used (e.g. in the case of an integer field).
+ *
+ * By default, presets are still editable. Set that to @c false
+ * to make the field unchangeable (again, the UI is responsible
+ * for setting that up).
+ */
+struct PresetField
+{
+    QString fieldName;
+    QString value;
+    bool editable = true;
+};
+
+/** @brief All the presets for one UI entity
+ *
+ * This is a collection of presets read from a module
+ * configuration file, one setting per field.
+ */
+class Presets : public QVector< PresetField >
+{
+public:
+    explicit Presets( const QVariantMap& configurationMap );
+    Presets( const QVariantMap& configurationMap, const QStringList& recognizedKeys );
+};
+}  // namespace ModuleSystem
+}  // namespace Calamares
+
+#endif