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translate.js
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translate.js
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const CONFIDENCE_BOOST_STATION = 4;
const CONFIDENCE_BOOST_STOP = 2;
const getLabel = properties => {
const { name, street, housenumber, postalcode, city } = properties;
const result = [];
if (name) {
result.push(name);
}
if (street) {
const num = housenumber || "";
result.push(`${street} ${num}`.trim());
}
if (city) {
const pc = postalcode || "";
result.push(`${pc} ${city}`);
}
return result.join(", ");
};
// if we already have a name, we keep it.
// exact addresses (with house numbers) don't have a name
// so we will use the label instead.
const getName = properties => {
const { name, label } = properties;
if (name) {
return name;
} else return label;
};
const translateResults = (photonResult, gtfsDataset = "") => {
let peliasResponse = {
features: []
};
photonResult.features.forEach((feature, idx) => {
if (feature.properties.state) {
feature.properties.region = feature.properties.state;
delete feature.properties.state;
}
if (feature.properties.postcode) {
feature.properties.postalcode = feature.properties.postcode;
delete feature.properties.postcode;
}
if (feature.properties.city) {
feature.properties.locality = feature.properties.city;
}
// in digitransit name is displayed in the first line and label in the second one
feature.properties.label = getLabel(feature.properties);
feature.properties.name = getName(feature.properties);
if (feature.properties.osm_value == "bus_stop" || feature.properties.osm_value == "tram_stop") {
feature.properties.layer = "stop";
} else if (
feature.properties.osm_key == "railway" &&
(feature.properties.osm_value == "station" || feature.properties.osm_value == "halt")
) {
feature.properties.layer = "station";
} else {
// `venue` is also applied to addresses but for the purpose of digitransit it does
// not matter: https://github.com/mfdz/digitransit-ui/blob/master/app/util/suggestionUtils.js#L54
feature.properties.layer = "venue";
}
if (feature.properties.extra && feature.properties.extra["ref:IFOPT"]) {
// TODO supply dataset name (now fixed to hbg) as param to translateResults
let ifoptid = feature.properties.extra["ref:IFOPT"];
parentId = /^\w*:\w*:\w*/.exec(ifoptid);
if (parentId) {
ifoptid = parentId[0];
}
feature.properties.id = "GTFS:" + gtfsDataset + ":" + ifoptid;
}
let confidence = 100 - idx;
if (feature.properties.layer == "stop") {
confidence += CONFIDENCE_BOOST_STOP;
} else if (feature.properties.layer == "station") {
confidence += CONFIDENCE_BOOST_STATION;
}
feature.properties.confidence = confidence / 100;
feature.properties.source = "openstreetmap";
peliasResponse.features.push(feature);
});
return peliasResponse;
};
const translateReverseGeocoding = (lat, lon, results) => {
if (results.features.length === 0) {
return {
features: [
{
geometry: {
coordinates: [lon, lat],
type: "Point"
},
type: "Feature",
properties: {
extent: [lon, lat, lon, lat],
country: null,
city: null,
countrycode: null,
county: null,
type: "house",
osm_type: "N",
street: null,
name: `${lat}, ${lon}`,
region: null,
postalcode: null,
locality: "Angermünde",
label: `${lat}, ${lon}`,
layer: "venue",
source: "openstreetmap"
}
}
]
};
} else {
return translateResults(results);
}
};
exports.translateResults = translateResults;
exports.translateReverseGeocoding = translateReverseGeocoding;