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