/*
 * This library is part of OpenCms -
 * the Open Source Content Management System
 *
 * Copyright (c) Alkacon Software GmbH (http://www.alkacon.com)
 *
 * 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.
 *
 * For further information about Alkacon Software GmbH, please see the
 * company website: http://www.alkacon.com
 *
 * For further information about OpenCms, please see the
 * project website: http://www.opencms.org
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package org.opencms.workplace.tools.cache;

import org.opencms.jsp.CmsJspActionElement;
import org.opencms.loader.CmsImageLoader;
import org.opencms.main.CmsEvent;
import org.opencms.main.I_CmsEventListener;
import org.opencms.main.OpenCms;
import org.opencms.widgets.CmsCalendarWidget;
import org.opencms.workplace.CmsWidgetDialog;
import org.opencms.workplace.CmsWidgetDialogParameter;

import java.util.Collections;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.jsp.PageContext;

/**
 * The image cache clear dialog.<p>
 * 
 * @since 7.0.5
 */
public class CmsImageCacheClearDialog extends CmsWidgetDialog {

    /** localized messages Keys prefix. */
    public static final String KEY_PREFIX = "image.clear";

    /** Defines which pages are valid for this dialog. */
    public static final String[] PAGES = {"page1"};

    /** Widget value. */
    private String m_time;

    /**
     * Public constructor with JSP action element.<p>
     * 
     * @param jsp an initialized JSP action element
     */
    public CmsImageCacheClearDialog(CmsJspActionElement jsp) {

        super(jsp);

    }

    /**
     * Public constructor with JSP variables.<p>
     * 
     * @param context the JSP page context
     * @param req the JSP request
     * @param res the JSP response
     */
    public CmsImageCacheClearDialog(PageContext context, HttpServletRequest req, HttpServletResponse res) {

        this(new CmsJspActionElement(context, req, res));
    }

    /**
     * Commits the edited group to the db.<p>
     */
    public void actionCommit() {

        try {
            float age = (System.currentTimeMillis() - Long.parseLong(m_time)) / (60f * 60f * 1000f);
            OpenCms.fireCmsEvent(new CmsEvent(
                I_CmsEventListener.EVENT_CLEAR_CACHES,
                Collections.<String, Object> singletonMap(CmsImageLoader.PARAM_CLEAR_IMAGES_CACHE, "" + age)));
        } catch (Exception e) {
            setCommitErrors(Collections.singletonList((Throwable)e));
        }
    }

    /**
     * Returns the time.<p>
     *
     * @return the time
     */
    public String getTime() {

        return m_time;
    }

    /**
     * Sets the time.<p>
     *
     * @param time the time to set
     */
    public void setTime(String time) {

        m_time = time;
    }

    /**
     * Creates the dialog HTML for all defined widgets of the named dialog (page).<p>
     * 
     * This overwrites the method from the super class to create a layout variation for the widgets.<p>
     * 
     * @param dialog the dialog (page) to get the HTML for
     * 
     * @return the dialog HTML for all defined widgets of the named dialog (page)
     */
    protected String createDialogHtml(String dialog) {

        StringBuffer result = new StringBuffer(1024);

        // create widget table
        result.append(createWidgetTableStart());

        // show error header once if there were validation errors
        result.append(createWidgetErrorHeader());

        if (dialog.equals(PAGES[0])) {
            // create the widgets for the first dialog page
            result.append(dialogBlockStart(key(Messages.GUI_IMAGECACHE_LABEL_CLEAN_BLOCK_0)));
            result.append(createWidgetTableStart());
            result.append(createDialogRowsHtml(0, 0));
            result.append(createWidgetTableEnd());
            result.append(dialogBlockEnd());
        }

        // close widget table
        result.append(createWidgetTableEnd());

        return result.toString();
    }

    /**
     * @see org.opencms.workplace.CmsWidgetDialog#defaultActionHtmlEnd()
     */
    protected String defaultActionHtmlEnd() {

        return "";
    }

    /**
     * Creates the list of widgets for this dialog.<p>
     */
    protected void defineWidgets() {

        setKeyPrefix(KEY_PREFIX);

        // default value is 30 minutes ago
        setTime("" + (System.currentTimeMillis() - (30 * 60 * 1000L)));
        // widgets to display
        addWidget(new CmsWidgetDialogParameter(this, "time", PAGES[0], new CmsCalendarWidget()));
    }

    /**
     * @see org.opencms.workplace.CmsWidgetDialog#getPageArray()
     */
    protected String[] getPageArray() {

        return PAGES;
    }

    /**
     * @see org.opencms.workplace.CmsWorkplace#initMessages()
     */
    protected void initMessages() {

        // add specific dialog resource bundle
        addMessages(Messages.get().getBundleName());
        // add default resource bundles
        super.initMessages();
    }

    /**
     * Overridden to set the online help path for this dialog.<p>
     * 
     * @see org.opencms.workplace.CmsWorkplace#initWorkplaceMembers(org.opencms.jsp.CmsJspActionElement)
     */
    protected void initWorkplaceMembers(CmsJspActionElement jsp) {

        super.initWorkplaceMembers(jsp);
        setOnlineHelpUriCustom("/cache/image/clean/");
    }
}