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var logger = require('../src/logger');
// Build pelias suggest query
function generate( params, precision, fuzziness ){
var getPrecision = function(zoom) {
switch (true) {
case (zoom > 15):
return 5; // zoom: >= 16
case (zoom > 9):
return 4; // zoom: 10-15
case (zoom > 5):
return 3; // zoom: 6-9
case (zoom > 3):
return 2; // zoom: 4-5
default:
return 1; // zoom: 1-3 or when zoom: undefined
}
};
var cmd = {
'pelias' : {
'text' : params.input,
'completion' : {
'size' : params.size,
'field' : 'suggest',
'context': {
'dataset': params.layers,
'location': {
'value': [ params.lon, params.lat ],
'precision': precision || getPrecision(params.zoom)
}
},
'fuzzy' : {
'fuzziness': fuzziness || 0
}
}
}
};
// logger.log( 'cmd', JSON.stringify( cmd, null, 2 ) );
return cmd;
}
module.exports = generate;