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45 lines
1.2 KiB
45 lines
1.2 KiB
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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; |