/*
 * Copyright (c) 2005-2011 Grameen Foundation USA
 * All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * permissions and limitations under the License.
 *
 * See also http://www.apache.org/licenses/LICENSE-2.0.html for an
 * explanation of the license and how it is applied.
 */

package org.mifos.framework.struts.tags;

import java.io.IOException;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.TagSupport;

import org.mifos.framework.business.AbstractBusinessObject;
import org.mifos.framework.components.taggenerator.TagGenerator;
import org.mifos.framework.exceptions.PageExpiredException;
import org.mifos.framework.util.helpers.Constants;
import org.mifos.framework.util.helpers.SessionUtils;

/**
 * This tag class is used to display header links on the top of the jsp page.
 */
public class HeaderTag extends TagSupport {
    private String selfLink;

    public HeaderTag() {
        super();
    }

    public String getSelfLink() {
        return selfLink;
    }

    public void setSelfLink(String selfLink) {
        this.selfLink = selfLink;
    }

    @Override
    public int doStartTag() throws JspException {
        AbstractBusinessObject obj = null;
        Object randomNum = pageContext.getSession().getAttribute(Constants.RANDOMNUM);
        try {
            obj = (AbstractBusinessObject) SessionUtils.getAttribute(Constants.BUSINESS_KEY, (HttpServletRequest) pageContext
                    .getRequest());
        } catch (PageExpiredException pex) {
            obj = (AbstractBusinessObject) pageContext.getSession().getAttribute(Constants.BUSINESS_KEY);
        }
        try {
            String linkStr;
            if (selfLink != null && selfLink != "") {
                linkStr = TagGenerator.createHeaderLinks(obj, Boolean.getBoolean(selfLink), randomNum);
            } else {
                linkStr = TagGenerator.createHeaderLinks(obj, true, randomNum);
            }

            pageContext.getOut().write(linkStr);
        }

        catch (PageExpiredException e) {
            new JspException(e);
        } catch (IOException e) {
            new JspException(e);
        }
        return SKIP_BODY;
    }
}