bool GeoParser::isGeoJSONPolygon(const BSONObj& obj) {
BSONElement type = obj.getFieldDotted(GEOJSON_TYPE);
if (type.eoo() || (String != type.type())) { return false; }
if (GEOJSON_TYPE_POLYGON != type.String()) { return false; }
if (!crsIsOK(obj)) {
warning() << "Invalid CRS: " << obj.toString() << endl;
return false;
}
BSONElement coordElt = obj.getFieldDotted(GEOJSON_COORDINATES);
if (coordElt.eoo() || (Array != coordElt.type())) { return false; }
const vector<BSONElement>& coordinates = coordElt.Array();
// Must be at least one element, the outer shell
if (coordinates.empty()) { return false; }
// Verify that the shell is a bunch'a coordinates.
for (size_t i = 0; i < coordinates.size(); ++i) {
if (Array != coordinates[i].type()) { return false; }
const vector<BSONElement>& thisLoop = coordinates[i].Array();
// A triangle is the simplest 2d shape, and we repeat a vertex, so, 4.
if (thisLoop.size() < 4) { return false; }
if (!isArrayOfCoordinates(thisLoop)) { return false; }
if (!isLoopClosed(thisLoop)) { return false; }
}
return true;
}
static bool isValidLineString(const vector<BSONElement>& coordinateArray) {
if (coordinateArray.size() < 2) { return false; }
if (!isArrayOfCoordinates(coordinateArray)) { return false; }
vector<S2Point> vertices;
if (!parsePoints(coordinateArray, &vertices)) { return false; }
eraseDuplicatePoints(&vertices);
return S2Polyline::IsValid(vertices);
}
static bool isGeoJSONPolygonCoordinates(const vector<BSONElement>& coordinates) {
// Must be at least one element, the outer shell
if (coordinates.empty()) { return false; }
// Verify that the shell is a bunch'a coordinates.
for (size_t i = 0; i < coordinates.size(); ++i) {
if (Array != coordinates[i].type()) { return false; }
const vector<BSONElement>& thisLoop = coordinates[i].Array();
// A triangle is the simplest 2d shape, and we repeat a vertex, so, 4.
if (thisLoop.size() < 4) { return false; }
if (!isArrayOfCoordinates(thisLoop)) { return false; }
if (!isLoopClosed(thisLoop)) { return false; }
}
return true;
}
bool GeoParser::isMultiPoint(const BSONObj &obj) {
BSONElement type = obj.getFieldDotted(GEOJSON_TYPE);
if (type.eoo() || (String != type.type())) { return false; }
if (GEOJSON_TYPE_MULTI_POINT != type.String()) { return false; }
if (!crsIsOK(obj)) {
warning() << "Invalid CRS: " << obj.toString() << endl;
return false;
}
BSONElement coordElt = obj.getFieldDotted(GEOJSON_COORDINATES);
if (coordElt.eoo() || (Array != coordElt.type())) { return false; }
const vector<BSONElement>& coordinates = coordElt.Array();
if (0 == coordinates.size()) { return false; }
return isArrayOfCoordinates(coordinates);
}
bool GeoParser::isGeoJSONLineString(const BSONObj& obj) {
BSONElement type = obj.getFieldDotted(GEOJSON_TYPE);
if (type.eoo() || (String != type.type())) { return false; }
if (GEOJSON_TYPE_LINESTRING != type.String()) { return false; }
if (!crsIsOK(obj)) {
warning() << "Invalid CRS: " << obj.toString() << endl;
return false;
}
BSONElement coordElt = obj.getFieldDotted(GEOJSON_COORDINATES);
if (coordElt.eoo() || (Array != coordElt.type())) { return false; }
const vector<BSONElement>& coordinateArray = coordElt.Array();
if (coordinateArray.size() < 2) { return false; }
return isArrayOfCoordinates(coordinateArray);
}
bool GeoParser::isGeoJSONLineString(const BSONObj& obj) {
BSONElement type = obj.getFieldDotted(GEOJSON_TYPE);
if (type.eoo() || (String != type.type())) { return false; }
if (GEOJSON_TYPE_LINESTRING != type.String()) { return false; }
if (!crsIsOK(obj)) {
warning() << "Invalid CRS: " << obj.toString() << endl;
return false;
}
BSONElement coordElt = obj.getFieldDotted(GEOJSON_COORDINATES);
if (coordElt.eoo() || (Array != coordElt.type())) { return false; }
const vector<BSONElement>& coordinateArray = coordElt.Array();
if (coordinateArray.size() < 2) { return false; }
if (!isArrayOfCoordinates(coordinateArray)) { return false; }
vector<S2Point> vertices;
parsePoints(obj.getFieldDotted(GEOJSON_COORDINATES).Array(), &vertices);
eraseDuplicatePoints(&vertices);
return S2Polyline::IsValid(vertices);
}
