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/**
* Copyright (C) 2008-2012 10gen Inc.
*
* 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.
*
* 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/>.
*/
#pragma once
#include "mongo/db/jsobj.h"
#include <vector>
#include "third_party/s2/s2.h"
#include "mongo/db/geo/shapes.h"
class S2Cap;
class S2Cell;
class S2Polyline;
class S2Polygon;
namespace mongo {
// This class parses geographic data.
// It parses a subset of GeoJSON and creates S2 shapes from it.
// See http://geojson.org/geojson-spec.html for the spec.
//
// This class also parses the ad-hoc geo formats that MongoDB introduced.
//
// The parseFoo methods that return a bool internally call isFoo and return true
// if the foo is parsed correctly.
// The parseFoo methods that do not return a bool assume isFoo is true.
//
// We assume that if you're trying to parse something, you know it's valid.
class GeoParser {
public:
// Try to parse GeoJSON, then try legacy format, return true if either succeed.
// These call the various isPoint and parsePoint methods below.
// You can just use these bool parsePoint(...) methods.
static bool parsePoint(const BSONObj &obj, S2Point *out);
static bool parsePoint(const BSONObj &obj, S2Cell *out);
static bool parsePoint(const BSONObj &obj, Point *out);
// Check to see if it's GeoJSON or if it's legacy geo.
static bool isPoint(const BSONObj &obj);
static bool isGeoJSONPoint(const BSONObj &obj);
static void parseGeoJSONPoint(const BSONObj &obj, S2Point *out);
static void parseGeoJSONPoint(const BSONObj &obj, S2Cell *out);
static void parseGeoJSONPoint(const BSONObj &obj, Point *out);
static bool isLegacyPoint(const BSONObj &obj);
static void parseLegacyPoint(const BSONObj &obj, S2Point *out);
static void parseLegacyPoint(const BSONObj &obj, Point *out);
static bool parseLineString(const BSONObj &obj, S2Polyline *out);
static bool isLineString(const BSONObj &obj);
static bool isGeoJSONLineString(const BSONObj &obj);
static void parseGeoJSONLineString(const BSONObj &obj, S2Polyline *out);
static bool parsePolygon(const BSONObj &obj, S2Polygon *out);
static bool parsePolygon(const BSONObj &obj, Polygon *out);
static bool isPolygon(const BSONObj &obj);
static bool isGeoJSONPolygon(const BSONObj &obj);
static bool isLegacyPolygon(const BSONObj &obj);
static void parseGeoJSONPolygon(const BSONObj &obj, S2Polygon *out);
static void parseLegacyPolygon(const BSONObj &obj, Polygon *out);
static bool isLegacyBox(const BSONObj &obj);
static void parseLegacyBox(const BSONObj &obj, Box *out);
static bool isLegacyCenter(const BSONObj &obj);
static void parseLegacyCenter(const BSONObj &obj, Circle *out);
static bool isLegacyCenterSphere(const BSONObj &obj);
static void parseLegacyCenterSphere(const BSONObj &obj, S2Cap *out);
// Return true if the CRS field is 1. missing, or 2. is well-formed and
// has a datum we accept. Otherwise, return false.
// NOTE(hk): If this is ever used anywhere but internally, consider
// returning states: missing, invalid, unknown, ok, etc. -- whatever
// needed.
static bool crsIsOK(const BSONObj& obj);
};
} // namespace mongo
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