var peliasQuery = require('pelias-query'), defaults = require('./search_defaults'), textParser = require('./text_parser'), check = require('check-types'), geolib = require('geolib'); //------------------------------ // general-purpose search query //------------------------------ var query = new peliasQuery.layout.FilteredBooleanQuery(); // mandatory matches query.score( peliasQuery.view.boundary_country, 'must' ); query.score( peliasQuery.view.ngrams, 'must' ); // scoring boost query.score( peliasQuery.view.phrase ); query.score( peliasQuery.view.focus( peliasQuery.view.phrase ) ); query.score( peliasQuery.view.popularity( peliasQuery.view.phrase ) ); query.score( peliasQuery.view.population( peliasQuery.view.phrase ) ); // 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 ); // -------------------------------- /** map request variables to query variables for all inputs provided by this HTTP request. **/ function generateQuery( clean ){ var vs = new peliasQuery.Vars( defaults ); // input text vs.var( 'input:name', clean.text ); // size if( clean.querySize ) { vs.var( 'size', clean.querySize ); } // focus point if( check.number(clean['focus.point.lat']) && check.number(clean['focus.point.lon']) ){ vs.set({ 'focus:point:lat': clean['focus.point.lat'], 'focus:point:lon': clean['focus.point.lon'] }); } // focus viewport if( check.number(clean['focus.viewport.min_lat']) && check.number(clean['focus.viewport.max_lat']) && check.number(clean['focus.viewport.min_lon']) && check.number(clean['focus.viewport.max_lon']) ) { // calculate the centroid from the viewport box vs.set({ 'focus:point:lat': clean['focus.viewport.min_lat'] + ( clean['focus.viewport.max_lat'] - clean['focus.viewport.min_lat'] ) / 2, 'focus:point:lon': clean['focus.viewport.min_lon'] + ( clean['focus.viewport.max_lon'] - clean['focus.viewport.min_lon'] ) / 2, 'focus:scale': calculateDiagonalDistance(clean) + 'km' }); } // boundary rect if( check.number(clean['boundary.rect.min_lat']) && check.number(clean['boundary.rect.max_lat']) && check.number(clean['boundary.rect.min_lon']) && check.number(clean['boundary.rect.max_lon']) ){ vs.set({ 'boundary:rect:top': clean['boundary.rect.max_lat'], 'boundary:rect:right': clean['boundary.rect.max_lon'], 'boundary:rect:bottom': clean['boundary.rect.min_lat'], 'boundary:rect:left': clean['boundary.rect.min_lon'] }); } // boundary circle // @todo: change these to the correct request variable names if( check.number(clean['boundary.circle.lat']) && check.number(clean['boundary.circle.lon']) ){ vs.set({ 'boundary:circle:lat': clean['boundary.circle.lat'], 'boundary:circle:lon': clean['boundary.circle.lon'] }); if( check.number(clean['boundary.circle.radius']) ){ vs.set({ 'boundary:circle:radius': Math.round( clean['boundary.circle.radius'] ) + 'km' }); } } // boundary country if( check.string(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 ); } // return diagonal distance in km, with min=1 function calculateDiagonalDistance(clean) { var diagonalDistance = geolib.getDistance( { latitude: clean['focus.viewport.min_lat'], longitude: clean['focus.viewport.min_lon'] }, { latitude: clean['focus.viewport.max_lat'], longitude: clean['focus.viewport.max_lon'] }, 1000 ) / 1000; return Math.max(diagonalDistance, 1); } module.exports = generateQuery;