[libcalamares] GeoIP that always returns a fixed value

- Value is configurable (through the "selector" which is passed
  to GeoIP lookups). This is convenient for tests so you can "fix"
  the value that the lookup will return.

src/libcalamares/geoip/GeoIPFixed.cpp

@@ -0,0 +1,47 @@
+/* === This file is part of Calamares - <http://github.com/calamares> ===
+ *
+ *   SPDX-FileCopyrightText: 2020 Adriaan de Groot <groot@kde.org>
+ *
+ *   Calamares is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   Calamares 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 General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with Calamares. If not, see <http://www.gnu.org/licenses/>.
+ *
+ *   SPDX-License-Identifier: GPL-3.0-or-later
+ *   License-Filename: LICENSE
+ */
+
+#include "GeoIPFixed.h"
+
+namespace CalamaresUtils
+{
+namespace GeoIP
+{
+
+GeoIPFixed::GeoIPFixed( const QString& attribute )
+    : Interface( attribute.isEmpty() ? QStringLiteral( "Europe/Amsterdam" ) : attribute )
+{
+}
+
+QString
+GeoIPFixed::rawReply( const QByteArray& )
+{
+    return m_element;
+}
+
+GeoIP::RegionZonePair
+GeoIPFixed::processReply( const QByteArray& data )
+{
+    return splitTZString( rawReply( data ) );
+}
+
+}  // namespace GeoIP
+}  // namespace CalamaresUtils

src/libcalamares/geoip/GeoIPFixed.h

@@ -0,0 +1,55 @@
+/* === This file is part of Calamares - <http://github.com/calamares> ===
+ *
+ *   SPDX-FileCopyrightText: 2020 Adriaan de Groot <groot@kde.org>
+ *
+ *   Calamares is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   Calamares 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 General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with Calamares. If not, see <http://www.gnu.org/licenses/>.
+ *
+ *   SPDX-License-Identifier: GPL-3.0-or-later
+ *   License-Filename: LICENSE
+ */
+
+#ifndef GEOIP_GEOIPFIXED_H
+#define GEOIP_GEOIPFIXED_H
+
+#include "Interface.h"
+
+namespace CalamaresUtils
+{
+namespace GeoIP
+{
+/** @brief GeoIP with a fixed return value
+ *
+ * The data is ignored entirely and the attribute value is returned unchanged.
+ * Note that you still need to provide a usable URL for a successful GeoIP
+ * lookup -- the URL's data is just ignored.
+ *
+ * @note This class is an implementation detail.
+ */
+class GeoIPFixed : public Interface
+{
+public:
+    /** @brief Configure the value to return from rawReply()
+     *
+     * An empty string, which would not be a valid zone name, is
+     * translated to "Europe/Amsterdam".
+     */
+    explicit GeoIPFixed( const QString& value = QString() );
+
+    virtual RegionZonePair processReply( const QByteArray& ) override;
+    virtual QString rawReply( const QByteArray& ) override;
+};
+
+}  // namespace GeoIP
+}  // namespace CalamaresUtils
+#endif