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package org.madore.damlengine;

import java.util.Map;
import java.util.HashMap;
import org.w3c.dom.*;

public final class TodoWeblogSelectionElement extends TodoDefaultElement {

    public enum Type {
	RECENT_COUNT,
	MONTH_YEAR,
	MONTH_MONTH,
	CATEGORY_NAME,
	CATEGORY_CODE;
    }

    public static class Factory extends TodoElement.Factory {
	final Type t;
	public Factory(Type t) {
	    super();
	    this.t = t;
	}
	@Override
	public TodoWeblogSelectionElement newItem(Element node,
						  Context ctx,
						  TodoItem caller) {
	    return new TodoWeblogSelectionElement(t, node, ctx, caller);
	}
    }

    final Type t;

    public TodoWeblogSelectionElement(Type t,
				      Element node,
				      Context ctx,
				      TodoItem caller) {
	super(node, ctx, caller);
	this.t = t;
    }

    protected final static Map<String,Map<String,String>> categoryNames;

    static {
	categoryNames = new HashMap<String,Map<String,String>>();
	categoryNames.put("en", new HashMap<String,String>());
	categoryNames.put("fr", new HashMap<String,String>());
	categoryNames.put("de", new HashMap<String,String>());
	categoryNames.put("ia", new HashMap<String,String>());
	categoryNames.get("en").put("glf", "Gratuitous Literary Fragments");
	categoryNames.get("fr").put("glf", "Fragments litt\u00e9raires gratuits");
	categoryNames.get("ia").put("glf", "Fragmentos litterari gratuite");
	categoryNames.get("en").put("math", "Mathematics");
	categoryNames.get("fr").put("math", "Math\u00e9matiques");
	categoryNames.get("en").put("phys", "Physics");
	categoryNames.get("fr").put("phys", "Physique");
    }

    public static String categoryName(String code, String lang) {
	if ( categoryNames.get(lang) == null )
	    return code;
	String name = categoryNames.get(lang).get(code);
	if ( name == null )
	    return code;
	return name;
    }

    @Override
    public void handleNodeOnly() {
	if ( ctx.wsc == null )
	    throw new IllegalStateException("weblog-selection element encountered with no weblog selection state");
	// String lang = LangHelper.getLangRec(node);
	String str;
	switch ( t ) {
	case RECENT_COUNT:
	    if ( ! ( ctx.wsc instanceof Context.WeblogRecentSelectionContext ) )
		throw new IllegalStateException("weblog-selection-recent-count element encountered while not in weblog recent selection state");
	    str = String.format("%d", ((Context.WeblogRecentSelectionContext)(ctx.wsc)).count );
	    break;
	case MONTH_YEAR:
	    if ( ! ( ctx.wsc instanceof Context.WeblogMonthSelectionContext ) )
		throw new IllegalStateException("weblog-selection-recent-count element encountered while not in weblog month selection state");
	    str = ((Context.WeblogMonthSelectionContext)(ctx.wsc)).year;
	    break;
	case MONTH_MONTH:
	    if ( ! ( ctx.wsc instanceof Context.WeblogMonthSelectionContext ) )
		throw new IllegalStateException("weblog-selection-recent-count element encountered while not in weblog month selection state");
	    str = ((Context.WeblogMonthSelectionContext)(ctx.wsc)).month;
	    break;
	case CATEGORY_CODE:
	    if ( ! ( ctx.wsc instanceof Context.WeblogCategorySelectionContext ) )
		throw new IllegalStateException("weblog-selection-recent-count element encountered while not in weblog category selection state");
	    str = ((Context.WeblogCategorySelectionContext)(ctx.wsc)).code;
	    break;
	case CATEGORY_NAME:
	    if ( ! ( ctx.wsc instanceof Context.WeblogCategorySelectionContext ) )
		throw new IllegalStateException("weblog-selection-recent-count element encountered while not in weblog category selection state");
	    str = categoryName(((Context.WeblogCategorySelectionContext)(ctx.wsc)).code, LangHelper.getLangRec(node));
	    break;
	default:
	    throw new AssertionError("unknown type");
	}
	Node txt = ctx.doc.createTextNode(str);
	node.getParentNode().replaceChild(txt, node);
    }

}