/*
 * #%L
 * Alfresco Remote API
 * %%
 * Copyright (C) 2005 - 2016 Alfresco Software Limited
 * %%
 * This file is part of the Alfresco software. 
 * If the software was purchased under a paid Alfresco license, the terms of 
 * the paid license agreement will prevail.  Otherwise, the software is 
 * provided under the following open source license terms:
 * 
 * Alfresco 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, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * Alfresco 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 Alfresco. If not, see <http://www.gnu.org/licenses/>.
 * #L%
 */
package org.alfresco.rest.api.impl;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;

import org.alfresco.query.PagingResults;
import org.alfresco.rest.api.People;
import org.alfresco.rest.api.Preferences;
import org.alfresco.rest.api.model.Preference;
import org.alfresco.rest.framework.core.exceptions.RelationshipResourceNotFoundException;
import org.alfresco.rest.framework.resource.parameters.CollectionWithPagingInfo;
import org.alfresco.rest.framework.resource.parameters.Paging;
import org.alfresco.service.cmr.preference.PreferenceService;
import org.alfresco.util.Pair;

/**
 * Centralises access to preference services and maps between representations.
 * 
 * @author steveglover
 * @since publicapi1.0
 */
public class PreferencesImpl implements Preferences
{
	private People people;
    private PreferenceService preferenceService;
    
	public void setPeople(People people)
	{
		this.people = people;
	}

	public void setPreferenceService(PreferenceService preferenceService)
	{
		this.preferenceService = preferenceService;
	}

	public Preference getPreference(String personId, String preferenceName)
	{
		personId = people.validatePerson(personId);
		Serializable preferenceValue = preferenceService.getPreference(personId, preferenceName);
		if(preferenceValue != null)
		{
			return new Preference(preferenceName, preferenceValue);
		}
		else
		{
			throw new RelationshipResourceNotFoundException(personId, preferenceName);
		}
	}
	
	public CollectionWithPagingInfo<Preference> getPreferences(String personId, Paging paging)
	{
		personId = people.validatePerson(personId);

		PagingResults<Pair<String, Serializable>> preferences = preferenceService.getPagedPreferences(personId, null, Util.getPagingRequest(paging));
		List<Preference> ret = new ArrayList<Preference>(preferences.getPage().size());
		for(Pair<String, Serializable> prefEntity : preferences.getPage())
		{
			Preference pref = new Preference(prefEntity.getFirst(), prefEntity.getSecond());
			ret.add(pref);
		}

        return CollectionWithPagingInfo.asPaged(paging, ret, preferences.hasMoreItems(), preferences.getTotalResultCount().getFirst());
	}
}