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var peliasQuery = require('pelias-query'),
defaults = require('./defaults'),
textParser = require('./text_parser');
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//------------------------------
// general-purpose search query
//------------------------------
var query = new peliasQuery.layout.FilteredBooleanQuery();
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// mandatory matches
query.score( peliasQuery.view.boundary_country, 'must' );
query.score( peliasQuery.view.ngrams, 'must' );
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// scoring boost
query.score( peliasQuery.view.phrase );
query.score( peliasQuery.view.focus );
// address components
query.score( peliasQuery.view.address('housenumber') );
query.score( peliasQuery.view.address('street') );
query.score( peliasQuery.view.address('postcode') );
// admin components
query.score( peliasQuery.view.admin('alpha3') );
query.score( peliasQuery.view.admin('admin0') );
query.score( peliasQuery.view.admin('admin1') );
query.score( peliasQuery.view.admin('admin1_abbr') );
query.score( peliasQuery.view.admin('admin2') );
query.score( peliasQuery.view.admin('local_admin') );
query.score( peliasQuery.view.admin('locality') );
query.score( peliasQuery.view.admin('neighborhood') );
// non-scoring hard filters
query.filter( peliasQuery.view.boundary_circle );
query.filter( peliasQuery.view.boundary_rect );
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// groovy scripts used to handle tie-breaking
query.sort( peliasQuery.view.sort_numeric_script('admin_boost') );
query.sort( peliasQuery.view.sort_numeric_script('popularity') );
query.sort( peliasQuery.view.sort_numeric_script('population') );
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// --------------------------------
/**
map request variables to query variables for all inputs
provided by this HTTP request.
**/
function generateQuery( clean ){
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var vs = new peliasQuery.Vars( defaults );
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// input text
vs.var( 'input:name', clean.text );
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// size
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if( clean.size ){
vs.var( 'size', clean.size );
}
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// focus point
if( clean.lat && clean.lon ){
vs.set({
'focus:point:lat': clean.lat,
'focus:point:lon': clean.lon
});
}
// focus viewport
// @todo: change these to the correct request variable names
// @todo: calculate the centroid from the viewport box
if( clean.focus && clean.focus.viewport ){
var vp = clean.focus.viewport;
vs.set({
'focus:point:lat': vp.min_lat + ( vp.max_lat - vp.min_lat ) / 2,
'focus:point:lon': vp.min_lon + ( vp.max_lon - vp.min_lon ) / 2
});
}
// boundary rect
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if( clean.bbox ){
vs.set({
'boundary:rect:top': clean.bbox.top,
'boundary:rect:right': clean.bbox.right,
'boundary:rect:bottom': clean.bbox.bottom,
'boundary:rect:left': clean.bbox.left
});
}
// boundary circle
// @todo: change these to the correct request variable names
if( clean.boundary && clean.boundary.circle ){
vs.set({
'boundary:circle:lat': clean.boundary.circle.lat,
'boundary:circle:lon': clean.boundary.circle.lon,
'boundary:circle:radius': clean.boundary.circle.radius + 'm'
});
}
// boundary country
// @todo: change these to the correct request variable names
if( clean.boundary && clean.boundary.country ){
vs.set({
'boundary:country': clean.boundary.country
});
}
// run the address parser
if( clean.parsed_text ){
textParser( clean.parsed_text, vs );
}
return query.render( vs );
}
module.exports = generateQuery;