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/*
 * Copyright 2004-2023 the original author or authors.
 *
 * 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
 *
 *      https://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.grails.web.servlet;

import jakarta.servlet.http.HttpServletRequest;

import org.springframework.web.util.UrlPathHelper;

/**
 * Extends the default Spring UrlPathHelper and makes methods Grails path aware.
 *
 * @author Graeme Rocher
 * @since 0.5
 */
public class GrailsUrlPathHelper extends UrlPathHelper {

    public static final String GRAILS_DISPATCH_EXTENSION = ".dispatch";

    public static final String GRAILS_SERVLET_PATH = "/grails";

    @Override
    public String getPathWithinApplication(HttpServletRequest request) {
        String uri = super.getPathWithinApplication(request).trim();
        if (uri.startsWith(GRAILS_SERVLET_PATH)) {
            uri = uri.substring(GRAILS_SERVLET_PATH.length());
        }
        if (uri.endsWith(GRAILS_DISPATCH_EXTENSION)) {
            return uri.substring(0, uri.length() - GRAILS_DISPATCH_EXTENSION.length());
        }
        return uri;
    }

}