from xml.dom.minidom import getDOMImplementation
import codecs

class XMLOutput():
    def __init__(self, groups):
        impl = getDOMImplementation()
        xml_document = impl.createDocument(None, "parameters", None)
        xml_parameters = xml_document.documentElement
        for group in groups:
            xml_group = xml_document.createElement("group")
            xml_group.setAttribute("name", group.GetName())
            xml_parameters.appendChild(xml_group)
            for param in group.GetParams():
                xml_param = xml_document.createElement("parameter")
                xml_group.appendChild(xml_param)
                for code in param.GetFieldCodes():
                    value = param.GetFieldValue(code)
                    xml_field = xml_document.createElement(code)
                    xml_param.appendChild(xml_field)
                    xml_value = xml_document.createTextNode(value)
                    xml_field.appendChild(xml_value)
        self.xml_document = xml_document

    def Save(self, filename):
        with codecs.open(filename, 'w', 'utf-8') as f:
            self.xml_document.writexml(f, indent="    ", addindent="    ", newl="\n")