/*
 * Copyright (c) 2004-2019, University of Oslo
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 * Neither the name of the HISP project nor the names of its contributors may
 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.hisp.dhis.android.core.domain.metadata.internal;

import org.hisp.dhis.android.core.arch.helpers.UidsHelper;
import org.hisp.dhis.android.core.common.ObjectWithUid;
import org.hisp.dhis.android.core.organisationunit.OrganisationUnit;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Set;

public final class MetadataHelper {

    private MetadataHelper() {}

    public static Set<String> getOrgUnitsProgramUids(Collection<OrganisationUnit> organisationUnits) {
        List<ObjectWithUid> programs = new ArrayList<>();
        for (OrganisationUnit organisationUnit : organisationUnits) {
            if (organisationUnit.programs() != null) {
                programs.addAll(organisationUnit.programs());
            }
        }

        return UidsHelper.getUids(programs);
    }

    public static Set<String> getOrgUnitsDataSetUids(Collection<OrganisationUnit> organisationUnits) {
        List<ObjectWithUid> dataSets = new ArrayList<>();
        for (OrganisationUnit organisationUnit : organisationUnits) {
            if (organisationUnit.dataSets() != null) {
                dataSets.addAll(organisationUnit.dataSets());
            }
        }

        return UidsHelper.getUids(dataSets);
    }
}
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Use sets on metadata helper