/*
 * Copyright (c) 2010-2011 Lockheed Martin Corporation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.eurekastreams.server.action.execution.stream;

import java.io.Serializable;

import org.apache.commons.logging.Log;
import org.eurekastreams.commons.actions.ExecutionStrategy;
import org.eurekastreams.commons.actions.context.PrincipalActionContext;
import org.eurekastreams.commons.logging.LogFactory;
import org.eurekastreams.server.action.request.stream.GetFlaggedActivitiesRequest;
import org.eurekastreams.server.domain.PagedSet;
import org.eurekastreams.server.domain.stream.ActivityDTO;
import org.eurekastreams.server.persistence.mappers.DomainMapper;
import org.eurekastreams.server.persistence.mappers.stream.GetFlaggedActivities;
import org.eurekastreams.server.search.modelview.PersonModelView;
import org.eurekastreams.server.service.actions.strategies.activity.ActivityFilter;

/**
 * Returns the flagged activities.
 */
public class GetFlaggedActivitiesExecution implements ExecutionStrategy<PrincipalActionContext>
{
    /**
     * Logger.
     */
    private Log log = LogFactory.make();

    /** Mapper. */
    private GetFlaggedActivities mapper;

    /**
     * ActivityFilter.
     */
    private ActivityFilter activityDeletabilityFilter;

    /**
     * Mapper to get a person model view by account id.
     */
    private DomainMapper<String, PersonModelView> getPersonModelViewByAccountIdMapper;

    /**
     * Constructor.
     * 
     * @param inMapper
     *            Mapper.
     * @param inGetPersonModelViewByAccountIdMapper
     *            Mapper to get a person model view by account id.
     * @param inActivityDeletabilityFilter
     *            ActivityFilter.
     */
    public GetFlaggedActivitiesExecution(final GetFlaggedActivities inMapper,
            final DomainMapper<String, PersonModelView> inGetPersonModelViewByAccountIdMapper,
            final ActivityFilter inActivityDeletabilityFilter)
    {
        mapper = inMapper;
        activityDeletabilityFilter = inActivityDeletabilityFilter;
        getPersonModelViewByAccountIdMapper = inGetPersonModelViewByAccountIdMapper;
    }

    /**
     * Get a paged set of flagged activities.
     * 
     * @param inActionContext
     *            the action context having with GetFlaggedActivitiesByOrgRequest param
     * @return a paged set of flagged activities
     */
    @Override
    public Serializable execute(final PrincipalActionContext inActionContext)
    {
        String userName = inActionContext.getPrincipal().getAccountId();
        GetFlaggedActivitiesRequest request = (GetFlaggedActivitiesRequest) inActionContext.getParams();

        if (log.isInfoEnabled())
        {
            log.info("scoping the request for flagged activities with the requesting user account: " + userName);
        }
        request.setRequestingUserAccountId(userName);
        PagedSet<ActivityDTO> activities = mapper.execute(request);

        activityDeletabilityFilter.filter(activities.getPagedSet(), getPersonModelViewByAccountIdMapper
                .execute(inActionContext.getPrincipal().getAccountId()));

        if (log.isInfoEnabled())
        {
            log.info("Found " + activities.getPagedSet().size() + " activities");
        }
        return activities;
    }
}