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    /**
038     * Create a second level page.
039     * @param root the odf root page.
040     * @param level1Key the parent first level code (name)
041     * @param name the page's name.
042     * @param title the page's title.
043     * @param firstLevelPage The parent first level page.
044     * @return The <code>SecondLevelPage</code> created
045     */
046    public SecondLevelPage createSecondLevelPage(Page root, String level1Key, String name, String title, FirstLevelPage firstLevelPage) 
047    {
048        return new SecondLevelPage(root, getConfiguration(), this, level1Key, name, title, firstLevelPage);
049    }
050    
051    @Override
052    public SecondLevelPage getAmetysObjectById(String id) throws AmetysRepositoryException
053    {
054        String[] levels = _extractLevels(id);
055        String level1Code = levels[0];
056        String level2Code = levels[1];
057        Page rootPage = _extractRoot(id);
058        
059        return _findSecondLevelValueEntry(rootPage, level2Code)
060                .map(entry -> _toSecondLevelPage(rootPage, level1Code, entry))
061                .orElseThrow(() -> 
062                    new UnknownAmetysObjectException("There's no virtual child page named " + level2Code + " for parent " + rootPage));
063        
064    }
065    
066    private Page _extractRoot(String id)
067    {
068        String rootId = StringUtils.substringAfter(id, "?rootId=");
069        return _resolver.resolveById(rootId);
070    }
071    
072    private String[] _extractLevels(String id)
073    {
074        String levelParts = StringUtils.substringBetween(id, "://", "?");
075        
076        return Arrays.stream(StringUtils.split(levelParts, '/'))
077            .map(_odfPageHandler::decodeLevelValue)
078            .toArray(String[]::new);
079    }
080    
081    private Optional<Entry<String, LevelValue>> _findSecondLevelValueEntry(Page rootPage, String levelCode)
082    {
083        Map<String, LevelValue> secondLevelValues = _odfPageHandler.getLevel2Values(rootPage);
084        return _findSecondLevelValueEntry(secondLevelValues, levelCode);
085    }
086    
087    private Optional<Entry<String, LevelValue>> _findSecondLevelValueEntry(Map<String, LevelValue> secondLevelValues, String levelCode)
088    {
089        return secondLevelValues.entrySet().stream()
090             // entry = (code, title)
091            .filter(entry -> entry.getKey().equals(levelCode))
092            .findFirst();
093    }
094    
095    private SecondLevelPage _toSecondLevelPage(Page rootPage, String level1Code, Map.Entry<String, LevelValue> secondLevelValueEntry)
096    {
097        String level2Code = secondLevelValueEntry.getKey();
098        String title = secondLevelValueEntry.getValue().getValue();
099        
100        return createSecondLevelPage(rootPage, level1Code, level2Code, title, null);
101    }
102    
103    @Override
104    public String getScheme()
105    {
106        return "odfLevel2";
107    }
108
109    @Override
110    public boolean hasAmetysObjectForId(String id) throws AmetysRepositoryException
111    {
112        String[] levels = _extractLevels(id);
113        Page root = _extractRoot(id);
114        
115        return _hasSecondLevelValue(root, levels[1]);
116    }
117    
118    private boolean _hasSecondLevelValue(Page rootPage, String level2Code) throws AmetysRepositoryException
119    {
120        // FIXME should use page cache, because can return true when page does
121        // not exist. Maybe done like this for performance reasons?
122        Map<String, LevelValue> secondLevelValues = _odfPageHandler.getLevel2Values(rootPage);
123        return secondLevelValues.containsKey(level2Code);
124    }
125}