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45 lines
1.2 KiB
45 lines
1.2 KiB
10 years ago
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var GeoJSON = require('geojson');
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function suggest( docs ){
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// emit a warning if the doc format is invalid
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// @note: if you see this error, fix it ASAP!
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function warning(){
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console.error( 'error: invalid doc', __filename );
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return false; // remove offending doc from results
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}
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// flatten & expand data for geojson conversion
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var geodata = docs.map( function( doc ){
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// something went very wrong
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if( !doc || !doc.payload ) return warning();
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// split payload id string in to geojson properties
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if( 'string' !== typeof doc.payload.id ) return warning();
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var idParts = doc.payload.id.split('/');
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doc.type = idParts[0];
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doc.id = idParts[1];
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// split payload geo string in to geojson properties
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if( 'string' !== typeof doc.payload.geo ) return warning();
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var geoParts = doc.payload.geo.split(',');
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doc.lat = parseFloat( geoParts[1] );
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doc.lng = parseFloat( geoParts[0] );
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// remove payload from doc
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delete doc.payload;
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return doc;
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// filter-out invalid entries
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}).filter( function( doc ){
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return doc;
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});
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// convert to geojson
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return GeoJSON.parse( geodata, { Point: ['lat', 'lng'] } );
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}
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module.exports.suggest = suggest;
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