[libcalamares] Add "raw" support for extracting data from GeoIP

- This is prep-work for getting something other than the
   timezone (e.g. most extended formats also support Country).

src/libcalamares/geoip/GeoIPJSON.cpp

@@ -33,6 +33,12 @@ GeoIPJSON::GeoIPJSON(const QString& attribute)
 {
 }
 
+/** @brief Indexes into a map @m by selectors @p l
+ *
+ * Each element of @p l is an index into map @m or a sub-map thereof,
+ * so that "foo.bar.baz" looks up "baz" in the sub-map "bar" of sub-map
+ * "foo" of @p m, like a regular JSON lookup would.
+ */
 static QString
 selectMap( const QVariantMap& m, const QStringList& l, int index)
 {
@@ -51,8 +57,8 @@ selectMap( const QVariantMap& m, const QStringList& l, int index)
     }
 }
 
-GeoIP::RegionZonePair
-GeoIPJSON::processReply( const QByteArray& data )
+QString
+GeoIPJSON::rawReply( const QByteArray& data )
 {
     try
     {
@@ -63,7 +69,7 @@ GeoIPJSON::processReply( const QByteArray& data )
             var.isValid() &&
             var.type() == QVariant::Map )
         {
-            return splitTZString( selectMap( var.toMap(), m_element.split('.'), 0 ) );
+            return selectMap( var.toMap(), m_element.split('.'), 0 );
         }
         else
             cWarning() << "Invalid YAML data for GeoIPJSON";
@@ -73,7 +79,15 @@ GeoIPJSON::processReply( const QByteArray& data )
         CalamaresUtils::explainYamlException( e, data, "GeoIP data");
     }
 
-    return RegionZonePair( QString(), QString() );
+    return QString();
 }
 
+GeoIP::RegionZonePair
+GeoIPJSON::processReply( const QByteArray& data )
+{
+    return splitTZString( rawReply( data ) );
+}
+
+
+
 }  // namespace

src/libcalamares/geoip/GeoIPJSON.h

@@ -42,7 +42,8 @@ public:
      */
     explicit GeoIPJSON( const QString& attribute = QString() );
 
-    virtual RegionZonePair processReply( const QByteArray& );
+    virtual RegionZonePair processReply( const QByteArray& ) override;
+    virtual QString rawReply(const QByteArray & ) override;
 } ;
 
 }  // namespace

src/libcalamares/geoip/GeoIPXML.cpp

@@ -31,35 +31,60 @@ GeoIPXML::GeoIPXML( const QString& element )
 {
 }
 
-GeoIP::RegionZonePair
-GeoIPXML::processReply( const QByteArray& data )
+static QStringList
+getElementTexts( const QByteArray& data, const QString& tag )
 {
+    QStringList elements;
+
     QString domError;
     int errorLine, errorColumn;
 
     QDomDocument doc;
     if ( doc.setContent( data, false, &domError, &errorLine, &errorColumn ) )
     {
-        const auto tzElements = doc.elementsByTagName( m_element );
+        const auto tzElements = doc.elementsByTagName( tag );
         cDebug() << "GeoIP found" << tzElements.length() << "elements";
         for ( int it = 0; it < tzElements.length(); ++it )
         {
             auto e = tzElements.at(it).toElement();
-            auto tz = splitTZString( e.text() );
-            if ( !tz.first.isEmpty() )
-                return tz;
+            auto e_text = e.text();
+            if ( !e_text.isEmpty() )
+                elements.append( e_text );
         }
-
-        // None of them valid
-        cWarning() << "GeopIP XML had no recognizable timezone";
-        return RegionZonePair( QString(), QString() );
     }
     else
     {
         cWarning() << "GeoIP XML data error:" << domError << "(line" << errorLine << errorColumn << ')';
     }
 
-    return RegionZonePair( QString(), QString() );
+    if ( elements.count() < 1 )
+        cWarning() << "GeopIP XML had no non-empty elements" << tag;
+
+    return elements;
+}
+
+
+QString
+GeoIPXML::rawReply( const QByteArray& data )
+{
+    for ( const auto& e : getElementTexts( data, m_element ) )
+        if ( !e.isEmpty() )
+            return e;
+
+    return QString();
+}
+
+GeoIP::RegionZonePair
+GeoIPXML::processReply( const QByteArray& data )
+{
+    for ( const auto& e : getElementTexts( data, m_element ) )
+    {
+        auto tz = splitTZString( e );
+        if ( !tz.first.isEmpty() )
+            return tz;
+    }
+
+    return RegionZonePair();
 }
 
 }  // namespace

src/libcalamares/geoip/GeoIPXML.h

@@ -42,7 +42,8 @@ public:
      */
     explicit GeoIPXML( const QString& element = QString() );
 
-    virtual RegionZonePair processReply( const QByteArray& );
+    virtual RegionZonePair processReply( const QByteArray& ) override;
+    virtual QString rawReply(const QByteArray & ) override;
 } ;
 
 }  // namespace

src/libcalamares/geoip/Handler.h

@@ -66,12 +66,18 @@ public:
      * invalid (empty) result.
      */
     RegionZonePair get() const;
+    /// @brief Like get, but don't interpret the contents
+    QString getRaw() const;
 
     /** @brief Asynchronously get the GeoIP result.
      *
      * See get() for the return value.
      */
     QFuture< RegionZonePair > query() const;
+    /// @brief Like query, but don't interpret the contents
+    QFuture< QString > queryRaw() const;
+
+
 
     bool isValid() const { return m_type != Type::None; }
     Type type() const { return m_type; }

src/libcalamares/geoip/Interface.h

@@ -85,6 +85,9 @@ public:
      */
     virtual RegionZonePair processReply( const QByteArray& ) = 0;
 
+    /** @brief Get the raw reply data. */
+    virtual QString rawReply( const QByteArray& ) = 0;
+
 protected:
     Interface( const QString& e = QString() );