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/**
 * Copyright (C) 2019 Bonitasoft S.A.
 * Bonitasoft, 32 rue Gustave Eiffel - 38000 Grenoble
 * This library is free software; you can redistribute it and/or modify it under the terms
 * of the GNU Lesser General Public License as published by the Free Software Foundation
 * version 2.1 of the License.
 * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Lesser General Public License for more details.
 * You should have received a copy of the GNU Lesser General Public License along with this
 * program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
 * Floor, Boston, MA 02110-1301, USA.
 **/
package org.bonitasoft.engine.api.impl;

import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.bonitasoft.engine.identity.CustomUserInfo;
import org.bonitasoft.engine.identity.CustomUserInfoValue;
import org.bonitasoft.engine.identity.IdentityService;
import org.bonitasoft.engine.identity.SIdentityException;
import org.bonitasoft.engine.identity.model.SCustomUserInfoDefinition;
import org.bonitasoft.engine.identity.model.SCustomUserInfoValue;
import org.bonitasoft.engine.persistence.SBonitaReadException;
import org.bonitasoft.engine.service.ModelConvertor;

/**
 * @author Vincent Elcrin
 */
public class CustomUserInfoAPIDelegate {

    private final IdentityService service;

    public CustomUserInfoAPIDelegate(final IdentityService service) {
        this.service = service;
    }

    public List list(final long userId, final int startIndex, final int maxResult)
            throws SIdentityException, SBonitaReadException {
        List definitions = service.getCustomUserInfoDefinitions(startIndex, maxResult);
        if (definitions.size() == 0) {
            return Collections.emptyList();
        }
        Map values = transform(searchCorrespondingValues(userId, definitions));
        List info = new ArrayList();
        for (SCustomUserInfoDefinition definition : definitions) {
            info.add(new CustomUserInfo(userId, ModelConvertor.convert(definition), values.get(definition.getId())));
        }
        return info;
    }

    private Map transform(final List values) {
        Map map = new HashMap();
        for (SCustomUserInfoValue value : values) {
            map.put(value.getDefinitionId(), ModelConvertor.convert(value));
        }
        return map;
    }

    private List searchCorrespondingValues(final long userId,
            final List definitions)
            throws SBonitaReadException {
        return service.getCustomUserInfoValueOfUserAndDefinitions(userId, getIds(definitions));
    }

    private List getIds(final List definitions) {
        List ids = new ArrayList(definitions.size());
        for (SCustomUserInfoDefinition definition : definitions) {
            ids.add(definition.getId());
        }
        return ids;
    }
}