/** * helper sanitiser methods for geo parameters */ var util = require( 'util' ); /** * Parse and validate bbox parameter * bbox = bottom_left lon, bottom_left lat, top_right lon, top_right lat * bbox = left, bottom, right, top * bbox = min Longitude, min Latitude, max Longitude, max Latitude * * @param {object} clean * @param {string} param */ function sanitize_bbox( clean, param ) { if( !param ) { return; } var bboxArr = param.split( ',' ); if( Array.isArray( bboxArr ) && bboxArr.length === 4 ) { var bbox = bboxArr.map(parseFloat); if (bbox.some(isNaN)) { return; } clean.bbox = { right: Math.max( bbox[0], bbox[2] ), top: Math.max( bbox[1], bbox[3] ), left: Math.min( bbox[0], bbox[2] ), bottom: Math.min( bbox[1], bbox[3] ) }; } } /** * Validate lat,lon values * * @param {string} coord lat|lon * @param {object} clean * @param {string} param * @param {bool} latlon_is_required */ function sanitize_coord( coord, clean, param, latlon_is_required ) { var value = parseFloat( param ); if ( !isNaN( value ) ) { clean[coord] = value; } else if (latlon_is_required) { throw new Error( util.format( 'missing param \'%s\'', coord ) ); } } module.exports = { sanitize_bbox: sanitize_bbox, sanitize_coord: sanitize_coord };