Code coverage report for tokml/index.js

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module.exports = function tokml(geojson, options) {
 
    options = options || {
        name: 'name',
        description: 'description',
    };
 
    return '<?xml version="1.0" encoding="UTF-8"?>' +
        tag('kml',
            tag('Document',
                root(geojson, options)
               ), [['xmlns', '//www.opengis.net/kml/2.2']]);
};
 
function feature(options) {
    return function(_) {
        return tag('Placemark',
            name(_.properties, options) +
            description(_.properties, options) +
            geometry.any(_.geometry) +
            extendeddata(_.properties));
    };
}
 
function root(_, options) {
    if (!_.type) return '';
    switch (_.type) {
        case 'FeatureCollection': return _.features.map(feature(options)).join('');
        case 'Feature': return feature(options)(_);
        default:
            if (_.type in geometry) {
                return feature(options)({
                    type: 'Feature',
                    geometry: _,
                    properties: {}
                });
            }
    }
    return '';
}
 
function name(_, options) {
    return (_[options.name]) ? tag('name', encode(_[options.name])) : '';
}
 
function description(_, options) {
    return (_[options.description]) ? tag('description', encode(_[options.description])) : '';
}
 
// ## Geometry Types
//
// https://developers.google.com/kml/documentation/kmlreference#geometry
var geometry = {
    Point: function(_) {
        return tag('Point', tag('coordinates', _.coordinates.join(',')));
    },
    LineString: function(_) {
        return tag('LineString', tag('coordinates', linearring(_.coordinates)));
    },
    Polygon: function(_) {
        var outer = _.coordinates[0],
            inner = _.coordinates.slice(1),
            outerRing = tag('outerBoundaryIs',
                tag('LinearRing', tag('coordinates', linearring(outer)))),
            innerRings = inner.map(function(i) {
                return tag('innerBoundaryIs',
                    tag('LinearRing', tag('coordinates', linearring(i))));
            }).join('');
        return tag('Polygon', outerRing + innerRings);
    },
    MultiPoint: function(_) {
        return tag('MultiGeometry', _.coordinates.map(function(c) {
            return geometry.Point({ coordinates: c });
        }).join(''));
    },
    MultiPolygon: function(_) {
        return tag('MultiGeometry', _.coordinates.map(function(c) {
            return geometry.Polygon({ coordinates: c });
        }).join(''));
    },
    MultiLineString: function(_) {
        return tag('MultiGeometry', _.coordinates.map(function(c) {
            return geometry.LineString({ coordinates: c });
        }).join(''));
    },
    GeometryCollection: function(_) {
        return tag('MultiGeometry',
            _.geometries.map(geometry.any).join(''));
    },
    any: function(_) {
        if (geometry[_.type]) {
            return geometry[_.type](_);
        } else {
            return '';
        }
    }
};
 
function linearring(_) {
    return _.map(function(cds) { return cds.join(','); }).join(' ');
}
 
// ## Data
function extendeddata(_) {
    return tag('ExtendedData', pairs(_).map(data).join(''));
}
 
function data(_) {
    return tag('Data', encode(_[1]), [['name', encode(_[0])]]);
}
 
// ## Helpers
function pairs(_) {
    var o = [];
    for (var i in _) o.push([i, _[i]]);
    return o;
}
 
function attr(_) {
    return _ ? (' ' + _.map(function(a) {
        return a[0] + '="' + a[1] + '"';
    }).join(' ')) : '';
}
 
function tag(el, contents, attributes) {
    return '<' + el + attr(attributes) + '>' + contents + '</' + el + '>';
}
 
 
function encode(_) {
    return (_ || '').replace(/&/g, '&amp;')
        .replace(/</g, '&lt;')
        .replace(/>/g, '&gt;')
        .replace(/"/g, '&quot;');
}