https://cartlann.ie/plugins/Geolocation/views/shared/javascripts/geocoder.js?v=3.1.1

1function OmekaGeocoder(geocoder) {
2    function photon(query) {
3        var url = 'https://photon.komoot.io/api/';
4        return jQuery.getJSON(url, {q: query, limit: 1})
5            .then(function (data) {
6                if (!data.features.length) {
7                    return jQuery.Deferred().reject('No results found');
8                }
9
10                return data.features[0].geometry.coordinates.reverse();
11            });
12    }
13
14    function nominatim(query) {
15        var url = 'https://nominatim.openstreetmap.org/search';
16        return jQuery.getJSON(url, {q: query, limit: 1, format: 'json'})
17            .then(function (data) {
18                if (!data.length) {
19                    return jQuery.Deferred().reject('No results found');
20                }
21
22                return [data[0].lat, data[0].lon];
23            });
24    }
25
26    switch (geocoder) {
27        case 'photon':
28            this.geocoder = photon;
29            break;
30        case 'nominatim':
31            this.geocoder = nominatim;
32            break;
33        default:
34            console.log('Unknown geocoder specified');
35    }
36}
37
38OmekaGeocoder.prototype.geocode = function (query) {
39    function matchLiteralCoords(query) {
40        var latLngMatch = query.trim().match(/^(-?[\d]+(?:\.[\d]+)?)[\s]*[,;][\s]*(-?[\d]+(?:\.[\d]+)?)$/);
41        if (latLngMatch && Math.abs(latLngMatch[1]) <= 90 && Math.abs(latLngMatch[2]) <= 180) {
42            return [latLngMatch[1], latLngMatch[2]];
43        }
44        return false;
45    }
46    var literalCoords = matchLiteralCoords(query);
47    if (literalCoords) {
48        return jQuery.Deferred().resolve(literalCoords);
49    }
50    return this.geocoder(query);
51};