[libcalamares] Allow "fixed" as a GeoIP lookup type

src/libcalamares/CMakeLists.txt

@@ -23,6 +23,7 @@ set( libSources
 
     # GeoIP services
     geoip/Interface.cpp
+    geoip/GeoIPFixed.cpp
     geoip/GeoIPJSON.cpp
     geoip/Handler.cpp
 

src/libcalamares/geoip/Handler.cpp

@@ -18,11 +18,13 @@
 
 #include "Handler.h"
 
+#include "GeoIPFixed.h"
 #include "GeoIPJSON.h"
 #if defined( QT_XML_LIB )
 #include "GeoIPXML.h"
 #endif
 
+#include "Settings.h"
 #include "network/Manager.h"
 #include "utils/Logger.h"
 #include "utils/NamedEnum.h"
@@ -40,7 +42,8 @@ handlerTypes()
     static const NamedEnumTable<Type> names{
         { QStringLiteral( "none" ), Type::None },
         { QStringLiteral( "json" ), Type::JSON },
-        { QStringLiteral( "xml" ), Type::XML }
+        { QStringLiteral( "xml" ), Type::XML },
+        { QStringLiteral( "fixed" ), Type::Fixed }
     };
     // *INDENT-ON*
     // clang-format on
@@ -73,6 +76,10 @@ Handler::Handler( const QString& implementation, const QString& url, const QStri
     {
         cWarning() << "GeoIP style *none* does not do anything.";
     }
+    else if ( m_type == Type::Fixed && Calamares::Settings::instance() && !Calamares::Settings::instance()->debugMode() )
+    {
+        cWarning() << "GeoIP style *fixed* is not recommended for production.";
+    }
 #if !defined( QT_XML_LIB )
     else if ( m_type == Type::XML )
     {
@@ -99,6 +106,8 @@ create_interface( Handler::Type t, const QString& selector )
 #else
         return nullptr;
 #endif
+    case Handler::Type::Fixed:
+        return std::make_unique< GeoIPFixed >( selector );
     }
     NOTREACHED return nullptr;
 }

src/libcalamares/geoip/Handler.h

@@ -43,9 +43,10 @@ class DLLEXPORT Handler
 public:
     enum class Type
     {
-        None,
-        JSON,
-        XML
+        None, // No lookup, returns empty string
+        JSON, // JSON-formatted data, returns extracted field
+        XML,  // XML-formatted data, returns extracted field
+        Fixed // Returns selector string verbatim
     };
 
     /** @brief An unconfigured handler; this always returns errors. */

src/libcalamares/geoip/Interface.h

@@ -98,7 +98,7 @@ public:
     virtual QString rawReply( const QByteArray& ) = 0;
 
 protected:
-    Interface( const QString& e = QString() );
+    Interface( const QString& element = QString() );
 
     QString m_element;  // string for selecting from data
 };