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/*
 * This file is part of the BigConnect project.
 *
 * Copyright (c) 2013-2020 MWARE SOLUTIONS SRL
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License version 3
 * as published by the Free Software Foundation with the addition of the
 * following permission added to Section 15 as permitted in Section 7(a):
 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
 * MWARE SOLUTIONS SRL, MWARE SOLUTIONS SRL DISCLAIMS THE WARRANTY OF
 * NON INFRINGEMENT OF THIRD PARTY RIGHTS

 * This program 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 Affero General Public License for more details.
 * You should have received a copy of the GNU Affero General Public License
 * along with this program; if not, see http://www.gnu.org/licenses or write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA, 02110-1301 USA, or download the license from the following URL:
 * https://www.gnu.org/licenses/agpl-3.0.txt
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License.
 *
 * You can be released from the requirements of the license by purchasing
 * a commercial license. Buying such a license is mandatory as soon as you
 * develop commercial activities involving the BigConnect software without
 * disclosing the source code of your own applications.
 *
 * These activities include: offering paid services to customers as an ASP,
 * embedding the product in a web application, shipping BigConnect with a
 * closed source product.
 */
package io.bigconnect.dw.image.metadata.utils;

import com.drew.lang.GeoLocation;
import com.drew.metadata.Metadata;
import com.drew.metadata.MetadataException;
import com.drew.metadata.exif.GpsDirectory;
import com.mware.ge.type.GeoPoint;
import com.mware.ge.values.storable.GeoPointValue;
import com.mware.ge.values.storable.Values;

public class GeoPointExtractor {

    public static GeoPointValue getGeoPoint(Metadata metadata) {
        GpsDirectory gpsDir = metadata.getFirstDirectoryOfType(GpsDirectory.class);
        if (gpsDir != null) {
            GeoLocation geoLocation = gpsDir.getGeoLocation();
            if (geoLocation != null) {
                Double latitude = geoLocation.getLatitude();
                Double longitude = geoLocation.getLongitude();
                Double altitude = null;
                try {
                    altitude = gpsDir.getDouble(GpsDirectory.TAG_ALTITUDE);
                } catch (MetadataException e) {
                    //No code needed. Altitude is already null.
                }

                if (latitude != null && latitude != 0 && longitude != null && longitude != 0) {
                    if (altitude != null && altitude != 0) {
                        GeoPoint geoPoint = new GeoPoint(latitude, longitude, altitude);
                        return Values.geoPointValue(geoPoint);
                    } else {
                        GeoPoint geoPoint = new GeoPoint(latitude, longitude);
                        return Values.geoPointValue(geoPoint);
                    }
                }
            }

        }
        return null;
    }

}