/**
 * Copyright (C) 2005-2009 Alfresco Software Limited.
 *
 * This file is part of the Spring Surf Extension project.
 *
 * 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.
 */

package org.alfresco.repo.web.scripts;

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

import org.springframework.extensions.config.ServerProperties;
import org.springframework.extensions.surf.util.URLDecoder;
import org.springframework.extensions.webscripts.Match;
import org.springframework.extensions.webscripts.RuntimeContainer;
import org.springframework.extensions.webscripts.WebScriptException;
import org.springframework.extensions.webscripts.WebScriptRequest;
import org.springframework.extensions.webscripts.servlet.ServletAuthenticatorFactory;
import org.springframework.extensions.webscripts.servlet.WebScriptServletRuntime;


/**
 * HTTP Servlet Web Script Runtime which can handle a tenant id in a web script path
 * 
 * @author davidc
 */
public class TenantWebScriptServletRuntime extends WebScriptServletRuntime
{
    public TenantWebScriptServletRuntime(RuntimeContainer container, ServletAuthenticatorFactory authFactory, HttpServletRequest req, HttpServletResponse res, ServerProperties serverProperties)
    {
        super(container, authFactory, req, res, serverProperties);
    }

    /* (non-Javadoc)
     * @see org.alfresco.web.scripts.WebScriptRuntime#getScriptUrl()
     */
    @Override
    protected String getScriptUrl()
    {
        // NOTE: Don't use req.getPathInfo() - it truncates the path at first semi-colon in Tomcat
        final String requestURI = req.getRequestURI();
        final String serviceContextPath = req.getContextPath() + req.getServletPath();
        String pathInfo;
        
        if (serviceContextPath.length() > requestURI.length())
        {
            // NOTE: assume a redirect has taken place e.g. tomcat welcome-page
            // NOTE: this is unlikely, and we'll take the hit if the path contains a semi-colon
            pathInfo = req.getPathInfo();
        }
        else
        {
            pathInfo = URLDecoder.decode(requestURI.substring(serviceContextPath.length()));
        }
        
        // ensure tenant is specified at beginning of path
        // NOTE: must contain at least root / and single character for tenant name
        if (pathInfo.length() < 2)
        {
            throw new WebScriptException("Missing tenant name in path: " + pathInfo);
        }
        // remove tenant
        int idx = pathInfo.indexOf('/', 1);
        pathInfo = pathInfo.substring(idx == -1 ? pathInfo.length() : idx);
        return pathInfo;
    }
    
    /* (non-Javadoc)
     * @see org.alfresco.web.scripts.WebScriptRuntime#createRequest(org.alfresco.web.scripts.WebScriptMatch)
     */
    @Override
    protected WebScriptRequest createRequest(Match match)
    {
        // TODO: construct org.springframework.extensions.webscripts.servlet.WebScriptServletResponse when
        //       org.alfresco.web.scripts.WebScriptServletResponse (deprecated) is removed
        servletReq = new TenantWebScriptServletRequest(this, req, match, serverProperties);
        return servletReq;
    }

    /* (non-Javadoc)
     * @see org.alfresco.web.scripts.WebScriptContainer#getName()
     */
    public String getName()
    {
        return "TenantServletRuntime";
    }

}