001/*
002 *  Copyright 2018 Anyware Services
003 *
004 *  Licensed under the Apache License, Version 2.0 (the "License");
005 *  you may not use this file except in compliance with the License.
006 *  You may obtain a copy of the License at
007 *
008 *      http://www.apache.org/licenses/LICENSE-2.0
009 *
010 *  Unless required by applicable law or agreed to in writing, software
011 *  distributed under the License is distributed on an "AS IS" BASIS,
012 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 *  See the License for the specific language governing permissions and
014 *  limitations under the License.
015 */
016package org.ametys.odf.schedulable;
017
018import java.util.List;
019import java.util.stream.Collectors;
020
021import org.apache.avalon.framework.service.ServiceException;
022import org.apache.avalon.framework.service.ServiceManager;
023import org.quartz.JobExecutionContext;
024
025import org.ametys.cms.repository.Content;
026import org.ametys.cms.repository.ContentDAO;
027import org.ametys.odf.course.Course;
028import org.ametys.odf.course.CourseFactory;
029import org.ametys.odf.coursepart.CoursePart;
030import org.ametys.odf.coursepart.CoursePartFactory;
031import org.ametys.plugins.core.impl.schedule.AbstractStaticSchedulable;
032import org.ametys.plugins.repository.AmetysObjectResolver;
033import org.ametys.plugins.repository.query.QueryHelper;
034import org.ametys.plugins.repository.query.expression.Expression.Operator;
035import org.ametys.plugins.repository.query.expression.StringExpression;
036
037/**
038 * Scheduler to purge orphan course parts.
039 */
040public class CoursePartPurgeSchedulable extends AbstractStaticSchedulable
041{
042    private AmetysObjectResolver _resolver;
043    private ContentDAO _contentDAO;
044
045    @Override
046    public void service(ServiceManager manager) throws ServiceException
047    {
048        super.service(manager);
049        _resolver = (AmetysObjectResolver) manager.lookup(AmetysObjectResolver.ROLE);
050        _contentDAO = (ContentDAO) manager.lookup(ContentDAO.ROLE);
051    }
052    
053    @Override
054    public void execute(JobExecutionContext context) throws Exception
055    {
056        // Getting all orphan course parts (linked to any course)
057        String xPathQuery = QueryHelper.getXPathQuery(null, CoursePartFactory.COURSE_PART_NODETYPE, null);
058        // Search course parts only
059        List<String> contentIdsToDelete = _resolver.<CoursePart>query(xPathQuery)
060            .stream()
061            // Verify if the content has no parent courses
062            .filter(coursePart -> coursePart.getCourses().isEmpty())
063            // Twice...
064            .filter(coursePart -> {
065                String query = QueryHelper.getXPathQuery(null, CourseFactory.COURSE_NODETYPE, new StringExpression(Course.CHILD_COURSE_PARTS, Operator.EQ, coursePart.getId()));
066                return !_resolver.query(query).iterator().hasNext();
067            })
068            // Log
069            .peek(coursePart -> getLogger().info("The purge will delete the content {}.", coursePart.toString()))
070            // Get the identifier
071            .map(Content::getId)
072            // Collect
073            .collect(Collectors.toList());
074        
075        // Remove the course parts
076        _contentDAO.deleteContents(contentIdsToDelete, true);
077    }
078}