src/main/java/org/apache/sling/feature/analyser/task/impl/CheckContentPackagesForPaths.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.sling.feature.analyser.task.impl;

import java.util.stream.Collectors;
import java.util.stream.Stream;

import org.apache.sling.feature.analyser.task.AnalyserTask;
import org.apache.sling.feature.analyser.task.AnalyserTaskContext;
import org.apache.sling.feature.scanner.ContentPackageDescriptor;

/**
 * This analyser checks for content paths in packages
 */
public class CheckContentPackagesForPaths implements AnalyserTask {

    private static final String PROP_INCLUDES = "includes";

    private static final String PROP_EXCLUDES = "excludes";

    @Override
    public String getName() {
        return "Content Packages Path Check";
    }

    @Override
    public String getId() {
        return "content-packages-paths";
    }

    @Override
    public void execute(final AnalyserTaskContext ctx)
    throws Exception {
        final Rules rules = new Rules(ctx);
        if (!rules.isConfigured()) {
            ctx.reportError("Configuration for task " + getId() + " is missing.");
            return;
        }
        
        for (final ContentPackageDescriptor d : ctx.getFeatureDescriptor().getDescriptors(ContentPackageDescriptor.class)) {
            checkPackage(ctx, d, rules);
        }
    }

    void checkPackage(final AnalyserTaskContext ctx, final ContentPackageDescriptor desc, final Rules rules) {
        desc.getContentPaths().stream()
            .filter(rules::isDisAllowed)
            .forEach(path -> ctx.reportArtifactError(desc.getArtifact().getId(), "Content not allowed: " + path));
    }

    static final class Rules {
        final String[] includes;
        final String[] excludes;

        Rules(final AnalyserTaskContext ctx) {
            final String inc = ctx.getConfiguration().get(PROP_INCLUDES);
            final String exc = ctx.getConfiguration().get(PROP_EXCLUDES);
            includes = splitAndTrim(inc);
            excludes = splitAndTrim(exc);
        }
        
        private String[] splitAndTrim(String property) {
            if (property == null) {
                return new String[] {};
            }
            
            return Stream.of(property.split(","))
                    .map(String::trim)
                    .collect(Collectors.toList())
                    .toArray(new String[] {});
        }

        boolean isConfigured() {
            return includes.length > 0 || excludes.length > 0;
        }

        boolean isDisAllowed(String path) {
            return !isAllowed(path);
        }

        boolean isAllowed(String path) {
            boolean isAllowed = includes.length == 0;
            int matchLength = 0;
            if ( !isAllowed ) {
                for(final String i : includes) {
                    if ( path.equals(i) || path.startsWith(i.concat("/")) ) {
                        isAllowed = true;
                        matchLength = i.length();
                        break;
                    }
                }
            }
            if ( isAllowed && excludes.length > 0 ) {
                for(final String i : excludes) {
                    if ( path.equals(i) || path.startsWith(i.concat("/")) && i.length() > matchLength ) {
                        isAllowed = false;
                        break;
                    }
                }
            }
            return isAllowed;
        }
    }

}