/*
 Wotonomy: OpenStep design patterns for pure Java applications.
 Copyright (C) 2000 Blacksmith, Inc.

 This library is free software; you can redistribute it and/or
 modify it under the terms of the GNU Lesser General Public
 License as published by the Free Software Foundation; either
 version 2.1 of the License, or (at your option) any later version.

 This library is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 Lesser General Public License for more details.

 You should have received a copy of the GNU Lesser General Public
 License along with this library; if not, see http://www.gnu.org
 */

package net.wotonomy.web;

import net.wotonomy.foundation.NSArray;
import net.wotonomy.foundation.NSDictionary;

/**
 * Implements a FORM element with dynamic bindings.
 * 
 * @author michael@mpowers.net
 * @author $Author: cgruber $
 * @version $Revision: 905 $
 */
public class WOForm extends WODynamicElement {

	public WOForm() {
		super();
	}

	public WOForm(String n, NSDictionary m, WOElement t) {
		super(n, m, t);
	}

	public String href(WOContext c) {
		return (String) valueForProperty("href", c.component());
	}

	public String directActionName(WOContext c) {
		return (String) valueForProperty("directAction", c.component());
	}

	public String directActionClass(WOContext c) {
		return (String) valueForProperty("actionClass", c.component());
	}

	public boolean multipleSubmit(WOContext c) {
		return booleanForProperty("multipleSubmit", c.component());
	}

	public void takeValuesFromRequest(WORequest aRequest, WOContext aContext) {
		if (rootElement != null) {
			rootElement.takeValuesFromRequest(aRequest, aContext);
		}
	}

	public void appendToResponse(WOResponse r, WOContext c) {
		// Append the opening tag
		r.appendContentString("<FORM");
		String link = href(c);
		// Append the href, if present
		if (link != null) {
			r.appendContentString(" HREF=\"");
			r.appendContentString(link);
			r.appendContentString("\"");
			link = null;
		} else {
			link = directActionName(c);
		}

		// otherwise, append Direct Action
		if (link != null) {
			r.appendContentString(" HREF=\"");
			if (directActionClass(c) != null)
				link = directActionClass(c) + "/" + link;
			r.appendContentString(c.directActionURLForActionNamed(link, urlFields(c.component())));
			r.appendContentString("\"");
			link = null;
//        } else if (associations.objectForKey("action") != null) {
		} else {
			// finally, append action
			r.appendContentString(" action=\"");
			r.appendContentString(c.componentActionURL());
			r.appendContentString("\"");
		} // else
// now defaulting to action if not specified(?): WOBuilder does generate WOForms without any bindings(!)        
//            throw new IllegalArgumentException("You must use one of directActionName, action, or href.");

		// Append any additional properties
		link = additionalHTMLProperties(c.component(),
				new NSArray(new Object[] { "href", "action", "directActionName", "actionClass", "multipleSubmit" }));
		if (link.length() > 0)
			r.appendContentString(link);
		r.appendContentString(">");
		// Notify that we're inside a form now
		c.setInForm(true);
		// Append the inner template
		rootElement.appendToResponse(r, c);
		// Close the tag
		r.appendContentString("</FORM>");
//        c.deleteLastElementIDComponent();
		c.setInForm(false);
	}

	public WOActionResults invokeAction(WORequest r, WOContext c) {
		// We only process the request if it's not a multipleSubmit (otherwise we leave
		// it to the buttons)
		if (!multipleSubmit(c) && c.elementID().equals(c.senderID()) && associations.objectForKey("action") != null) {
			return (WOActionResults) valueForProperty("action", c.component());
		}
		WOActionResults res = rootElement.invokeAction(r, c);
		return res;
	}

}