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var parser = require('addressit');
var extend = require('extend');
var type_mapping = require('../helper/type_mapping');
var check = require('check-types');
var logger = require('pelias-logger').get('api');
var DELIM = ',';
/*
* For performance, and to prefer POI and admin records, express a preference
* to only search coarse layers on very short text inputs.
*/
module.exports.get_layers = function get_layers(query) {
if (query.length <= 3 ) {
// no address parsing required
return type_mapping.layer_mapping.coarse;
}
};
module.exports.get_parsed_address = function get_parsed_address(query) {
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var getAdminPartsBySplittingOnDelim = function(queryParts) {
// naive approach - for admin matching during query time
// split 'flatiron, new york, ny' into 'flatiron' and 'new york, ny'
var address = {};
if (queryParts.length > 1) {
address.name = queryParts[0].trim();
// 1. slice away all parts after the first one
// 2. trim spaces from each part just in case
// 3. join the parts back together with appropriate delimiter and spacing
address.admin_parts = queryParts.slice(1)
.map(function (part) { return part.trim(); })
.join(DELIM + ' ');
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}
return address;
};
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var getAddressParts = function(query) {
// perform full address parsing
// except on queries so short they obviously can't contain an address
if (query.length > 3) {
return parser( query );
}
};
var queryParts = query.split(DELIM);
var addressWithAdminParts = getAdminPartsBySplittingOnDelim(queryParts);
var addressWithAddressParts= getAddressParts(queryParts.join(DELIM + ' '));
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var parsedAddress = extend(addressWithAdminParts,
addressWithAddressParts);
var address_parts = [ 'name',
'number',
'street',
'city',
'state',
'country',
'postalcode',
'regions',
'admin_parts'
];
var parsed_text = {};
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address_parts.forEach(function(part){
if (parsedAddress[part]) {
parsed_text[part] = parsedAddress[part];
}
});
// if all we found was regions, ignore it as it is not enough information to make smarter decisions
if (Object.keys(parsed_text).length === 1 && !check.undefined(parsed_text.regions))
{
logger.info('Ignoring address parser output, regions only');
return null;
}
return parsed_text;
};