package com.juick.rss.extension;

import com.rometools.rome.feed.module.Module;
import com.rometools.rome.io.ModuleGenerator;
import org.jdom2.Element;
import org.jdom2.Namespace;

import java.util.Collections;
import java.util.HashSet;
import java.util.Set;

/**
 * Created by vt on 13/12/2016.
 */
public class JuickModuleGenerator implements ModuleGenerator {

    private static final Namespace JUICK_NS  = Namespace.getNamespace("juick", JuickModule.URI);

    @Override
    public String getNamespaceUri() {
        return JuickModule.URI;
    }

    private static final Set NAMESPACES;

    static {
        Set nss = new HashSet();
        nss.add(JUICK_NS);
        NAMESPACES = Collections.unmodifiableSet(nss);
    }

    @Override
    public Set getNamespaces() {
        return NAMESPACES;
    }

    @Override
    public void generate(Module module, Element element) {
        // this is not necessary, it is done to avoid the namespace definition in every item.
        Element root = element;
        while (root.getParent()!=null && root.getParent() instanceof Element) {
            root = (Element) element.getParent();
        }
        root.addNamespaceDeclaration(JUICK_NS);

        JuickModule juickModule = (JuickModule) module;
        if (juickModule.getUid() > 0) {
            Element user = new Element("user", JUICK_NS);
            user.setAttribute("uid", String.valueOf(juickModule.getUid()), JUICK_NS);
            element.addContent(user);
        }
    }
}