From 3879087c4afbcfc4b20a78a748c865dcb5c78ac8 Mon Sep 17 00:00:00 2001
From: Teo Mrnjavac <teo@kde.org>
Date: Mon, 14 Jul 2014 18:10:24 +0200
Subject: [PATCH] Add YAML to QVariant conversion to YamlUtils

---
 src/libcalamaresui/utils/YamlUtils.cpp | 76 ++++++++++++++++++++++++++
 src/libcalamaresui/utils/YamlUtils.h   | 10 ++++
 2 files changed, 86 insertions(+)

diff --git a/src/libcalamaresui/utils/YamlUtils.cpp b/src/libcalamaresui/utils/YamlUtils.cpp
index 2bd89a082..3a56e7b00 100644
--- a/src/libcalamaresui/utils/YamlUtils.cpp
+++ b/src/libcalamaresui/utils/YamlUtils.cpp
@@ -19,6 +19,9 @@
 
 #include <yaml-cpp/yaml.h>
 
+#include <QRegExp>
+#include <QVariant>
+
 void
 operator>>( const YAML::Node& node, QStringList& v )
 {
@@ -28,3 +31,76 @@ operator>>( const YAML::Node& node, QStringList& v )
     }
 }
 
+namespace CalamaresUtils
+{
+
+const QRegExp _yamlScalarTrueValues = QRegExp( "true|True|TRUE|on|On|ON" );
+const QRegExp _yamlScalarFalseValues = QRegExp( "false|False|FALSE|off|Off|OFF" );
+
+QVariant
+yamlToVariant( const YAML::Node& node )
+{
+    switch ( node.Type() )
+    {
+    case YAML::NodeType::Scalar:
+        return yamlScalarToVariant( node );
+
+    case YAML::NodeType::Sequence:
+        return yamlSequenceToVariant( node );
+
+    case YAML::NodeType::Map:
+        return yamlMapToVariant( node );
+
+    case YAML::NodeType::Null:
+        return QVariant();
+    }
+
+    return QVariant();
+}
+
+
+QVariant
+yamlScalarToVariant( const YAML::Node& scalarNode )
+{
+    std::string stdScalar = scalarNode.as< std::string >();
+    QString scalarString = QString::fromStdString( stdScalar );
+    if ( _yamlScalarTrueValues.exactMatch( scalarString ) )
+        return QVariant( true );
+    if ( _yamlScalarFalseValues.exactMatch( scalarString ) )
+        return QVariant( false );
+    if ( QRegExp( "[-+]?\\d+" ).exactMatch( scalarString ) )
+        return QVariant( scalarString.toInt() );
+    if ( QRegExp( "[-+]?\\d*\\.?\\d+" ).exactMatch( scalarString ) )
+        return QVariant( scalarString.toDouble() );
+    return QVariant( scalarString );
+}
+
+
+QVariant
+yamlSequenceToVariant( const YAML::Node& sequenceNode )
+{
+    QVariantList vl;
+    for ( YAML::const_iterator it = sequenceNode.begin();
+          it != sequenceNode.end(); ++it )
+    {
+        vl << yamlToVariant( *it );
+    }
+    return vl;
+}
+
+
+QVariant
+yamlMapToVariant( const YAML::Node& mapNode )
+{
+    QVariantMap vm;
+    for ( YAML::const_iterator it = mapNode.begin();
+          it != mapNode.end(); ++it )
+    {
+        vm.insert( QString::fromStdString( it->first.as< std::string >() ),
+                   yamlToVariant( it->second ) );
+    }
+    return vm;
+}
+
+
+}
diff --git a/src/libcalamaresui/utils/YamlUtils.h b/src/libcalamaresui/utils/YamlUtils.h
index 173d76f76..0d2561369 100644
--- a/src/libcalamaresui/utils/YamlUtils.h
+++ b/src/libcalamaresui/utils/YamlUtils.h
@@ -28,4 +28,14 @@ class Node;
 
 void operator>>( const YAML::Node& node, QStringList& v );
 
+namespace CalamaresUtils
+{
+
+QVariant yamlToVariant( const YAML::Node& node );
+QVariant yamlScalarToVariant( const YAML::Node& scalarNode );
+QVariant yamlSequenceToVariant( const YAML::Node& sequenceNode );
+QVariant yamlMapToVariant( const YAML::Node& mapNode );
+
+} //ns
+
 #endif // YAMLUTILS_H