001/*
002 *  Copyright 2010 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 */
016
017package org.ametys.plugins.odfweb.repository;
018
019import java.util.Arrays;
020import java.util.Map;
021import java.util.Map.Entry;
022import java.util.Optional;
023
024import org.apache.commons.lang3.StringUtils;
025
026import org.ametys.odf.tree.OdfClassificationHandler.LevelValue;
027import org.ametys.plugins.repository.AmetysObjectFactory;
028import org.ametys.plugins.repository.AmetysRepositoryException;
029import org.ametys.plugins.repository.UnknownAmetysObjectException;
030import org.ametys.web.repository.page.Page;
031
032/**
033 * {@link AmetysObjectFactory} handling {@link SecondLevelPage}.
034 */
035public class SecondLevelPageFactory extends AbstractOdfPageFactory implements AmetysObjectFactory<SecondLevelPage>
036{
037    @Override
038    public SecondLevelPage getAmetysObjectById(String id) throws AmetysRepositoryException
039    {
040        String[] levels = _extractLevels(id);
041        String level1Code = levels[0];
042        String level2Code = levels[1];
043        Page rootPage = _extractRoot(id);
044        
045        return _findSecondLevelValueEntry(rootPage, level2Code)
046                .map(entry -> _toSecondLevelPage(rootPage, level1Code, entry))
047                .orElseThrow(() -> 
048                    new UnknownAmetysObjectException("There's no virtual child page named " + level2Code + " for parent " + rootPage));
049        
050    }
051    
052    private Page _extractRoot(String id)
053    {
054        String rootId = StringUtils.substringAfter(id, "?rootId=");
055        return _resolver.resolveById(rootId);
056    }
057    
058    private String[] _extractLevels(String id)
059    {
060        String levelParts = StringUtils.substringBetween(id, "://", "?");
061        
062        return Arrays.stream(StringUtils.split(levelParts, '/'))
063            .map(_odfPageHandler::decodeLevelValue)
064            .toArray(String[]::new);
065    }
066    
067    private Optional<Entry<String, LevelValue>> _findSecondLevelValueEntry(Page rootPage, String levelCode)
068    {
069        Map<String, LevelValue> secondLevelValues = _odfPageHandler.getLevel2Values(rootPage);
070        return _findSecondLevelValueEntry(secondLevelValues, levelCode);
071    }
072    
073    private Optional<Entry<String, LevelValue>> _findSecondLevelValueEntry(Map<String, LevelValue> secondLevelValues, String levelCode)
074    {
075        return secondLevelValues.entrySet().stream()
076             // entry = (code, title)
077            .filter(entry -> entry.getKey().equals(levelCode))
078            .findFirst();
079    }
080    
081    private SecondLevelPage _toSecondLevelPage(Page rootPage, String level1Code, Map.Entry<String, LevelValue> secondLevelValueEntry)
082    {
083        String level2Code = secondLevelValueEntry.getKey();
084        String title = secondLevelValueEntry.getValue().getValue();
085        
086        return new SecondLevelPage(this, rootPage, level1Code, level2Code, title);
087    }
088    
089    @Override
090    public String getScheme()
091    {
092        return "odfLevel2";
093    }
094
095    @Override
096    public boolean hasAmetysObjectForId(String id) throws AmetysRepositoryException
097    {
098        String[] levels = _extractLevels(id);
099        Page root = _extractRoot(id);
100        
101        return _hasSecondLevelValue(root, levels[1]);
102    }
103    
104    private boolean _hasSecondLevelValue(Page rootPage, String level2Code) throws AmetysRepositoryException
105    {
106        // FIXME should use page cache, because can return true when page does
107        // not exist. Maybe done like this for performance reasons?
108        Map<String, LevelValue> secondLevelValues = _odfPageHandler.getLevel2Values(rootPage);
109        return secondLevelValues.containsKey(level2Code);
110    }
111}