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A web service test double for all occasions

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/*
 * Copyright (C) 2011 Thomas Akehurst
 *
 * 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 com.github.tomakehurst.wiremock.common;

import com.github.tomakehurst.wiremock.matching.AnythingPattern;
import com.github.tomakehurst.wiremock.matching.UrlPattern;
import com.github.tomakehurst.wiremock.stubbing.StubMapping;
import org.apache.commons.lang3.StringUtils;

import java.net.URI;
import java.text.Normalizer;
import java.util.Locale;
import java.util.regex.Pattern;

import static org.apache.commons.lang3.StringUtils.isNotEmpty;

public class SafeNames {

    private static final Pattern NON_ALPHANUMERIC = Pattern.compile("[^\\w-]");
    private static final Pattern WHITESPACE = Pattern.compile("[\\s]");

    public static String makeSafeFileName(StubMapping mapping) {
        return makeSafeFileName(mapping, "json");
    }

    public static String makeSafeFileName(StubMapping mapping, String extension) {
        String suffix = "-" + mapping.getId() + "." + extension;
        if (isNotEmpty(mapping.getName())) {
            return makeSafeName(mapping.getName()) + suffix;
        }

        UrlPattern urlMatcher = mapping.getRequest().getUrlMatcher();

        if (urlMatcher.getPattern() instanceof AnythingPattern) {
            return suffix.substring(1);
        }

        String expectedUrl = urlMatcher.getExpected();
        URI uri = URI.create(sanitise(expectedUrl));
        return makeSafeNameFromUrl(uri.getPath()) + suffix;
    }

    public static String makeSafeNameFromUrl(String urlPath) {
        String startingPath = urlPath.replace("/", "_");
        return makeSafeName(startingPath);
    }

    public static String makeSafeName(String name) {
        String nowhitespace = WHITESPACE.matcher(name).replaceAll("-");
        String normalized = Normalizer.normalize(nowhitespace, Normalizer.Form.NFD);
        String slug = sanitise(normalized);

        slug = slug.replaceAll("^[_]*", "");
        slug = slug.replaceAll("[_]*$", "");

        slug = StringUtils.truncate(slug, 200);

        return slug.toLowerCase(Locale.ENGLISH);
    }

    private static String sanitise(String s) {
        return NON_ALPHANUMERIC.matcher(s).replaceAll("");
    }
}