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var check = require('check-types');
function sendJSONResponse(req, res, next) {
// do nothing if no result data set
if (!res || !check.object(res.body) || !check.object(res.body.geocoding)) {
return next();
}
// default status
var statusCode = 200;
// vary status code whenever an error was reported
var geocoding = res.body.geocoding;
if( check.array( geocoding.errors ) && geocoding.errors.length ){
// default status for errors is 400 Bad Request
statusCode = 400; // 400 Bad Request
// iterate over all reported errors
geocoding.errors.forEach( function( err ){
// custom status codes for instances of the Error() object.
if( err instanceof Error ){
// we can extract the error type from the constructor name
switch( err.constructor.name ){
// elasticsearch errors
// see: https://github.com/elastic/elasticsearch-js/blob/master/src/lib/errors.js
case 'RequestTimeout': statusCode = 408; break; // 408 Request Timeout
case 'NoConnections': statusCode = 502; break; // 502 Bad Gateway
case 'ConnectionFault': statusCode = 502; break; // 502 Bad Gateway
case 'Serialization': statusCode = 500; break; // 500 Internal Server Error
case 'Generic': statusCode = 500; break; // 500 Internal Server Error
default: statusCode = 500; // 500 Internal Server Error
}
}
});
}
// respond
return res.status(statusCode).json(res.body);
}
module.exports = sendJSONResponse;