io.knotx.adapter.common.placeholders.UriPlaceholderSubstitutor.java Source code

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Here is the source code for io.knotx.adapter.common.placeholders.UriPlaceholderSubstitutor.java

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/*
 * Copyright (C) 2016 Cognifide Limited
 *
 * 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 io.knotx.adapter.common.placeholders;

import io.knotx.dataobjects.ClientRequest;
import java.net.URI;
import java.util.Arrays;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.math.NumberUtils;

public class UriPlaceholderSubstitutor implements PlaceholderSubstitutor {

    private static final String URI_PREFIX = "uri.";

    private static final String SLING_URI_PREFIX = "slingUri.";

    @Override
    public String getValue(ClientRequest request, String placeholder) {
        return Arrays.stream(Strategy.values())
                .filter(strategy -> StringUtils.startsWith(placeholder, strategy.prefix)).findFirst()
                .map(strategy -> strategy.getValue(request.getPath(), placeholder)).orElse(null);
    }

    private enum Strategy {
        PATHPART(URI_PREFIX + "pathpart[") {
            @Override
            String getValue(String uri, String placeholder) {
                final int index = NumberUtils.toInt(StringUtils.substringBetween(placeholder, "[", "]"), -1);
                String[] parts = URI.create(uri).getPath().split("/");
                return parts.length > index ? parts[index] : "";
            }
        },
        PATH(URI_PREFIX + "path") {
            @Override
            String getValue(String uri, String placeholder) {
                return URI.create(uri).getPath();
            }
        },
        EXTENSION(URI_PREFIX + "extension") {
            @Override
            String getValue(String uri, String placeholder) {
                return StringUtils.substringAfterLast(URI.create(uri).getPath(), ".");
            }
        },
        SLING_PATHPART(SLING_URI_PREFIX + "pathpart[") {
            @Override
            String getValue(String uri, String placeholder) {
                final int index = NumberUtils.toInt(StringUtils.substringBetween(placeholder, "[", "]"), -1);
                return SlingUriInfoHelper.getUriInfo(uri).getPathPart(index);
            }
        },
        SLING_PATH(SLING_URI_PREFIX + "path") {
            @Override
            String getValue(String uri, String placeholder) {
                return SlingUriInfoHelper.getUriInfo(uri).getPath();
            }
        },
        SLING_SELECTORSTRING(SLING_URI_PREFIX + "selectorstring") {
            @Override
            String getValue(String uri, String placeholder) {
                return SlingUriInfoHelper.getUriInfo(uri).getSelectorString();
            }
        },
        SLING_SELECTOR(SLING_URI_PREFIX + "selector[") {
            @Override
            String getValue(String uri, String placeholder) {
                final int index = NumberUtils.toInt(StringUtils.substringBetween(placeholder, "[", "]"), -1);
                return SlingUriInfoHelper.getUriInfo(uri).getSelector(index);
            }
        },
        SLING_EXTENSION(SLING_URI_PREFIX + "extension") {
            @Override
            String getValue(String uri, String placeholder) {
                return SlingUriInfoHelper.getUriInfo(uri).getExtension();
            }
        },
        SLING_SUFFIX(SLING_URI_PREFIX + "suffix") {
            @Override
            String getValue(String uri, String placeholder) {
                return SlingUriInfoHelper.getUriInfo(uri).getSuffix();
            }
        };

        final String prefix;

        Strategy(String prefix) {
            this.prefix = prefix;
        }

        abstract String getValue(String uri, String placeholder);

    }

}