forked from penguin86/nextcloud-maps-client
Daniele Verducci (Slimpenguin)
89 lines
3.3 KiB
Java
89 lines
3.3 KiB
Java
package it.danieleverducci.nextcloudmaps.utils;
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import android.net.Uri;
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import android.util.Log;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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import it.danieleverducci.nextcloudmaps.model.Geofavorite;
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public class GeoUriParser {
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private static final Pattern PATTERN_GEO = Pattern.compile("geo:(-?[\\d.]+),(-?[\\d.]+)");
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// Try to match not only geoUri but also Google Maps Uri
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private static final Pattern PATTERN_BROAD = Pattern.compile(
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"(?:@|&query=|&ce\nter=|geo:|#map=\\d{1,2}\\/)(-?\\d{1,2}\\.\\d+)(?:,|%2C|\\/)(-?\\d{1,3}\\.\\d{1,10})"
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);
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/**
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* Parses an URI into latitude and longitude
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* @param uri to parse
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* @param strict if true, the uri must be a valid geo: uri, otherwise a broader check is applied to include other uris, like Google Maps ones
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* @return the parsed coordinates in an array [lat,lon]
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* @throws IllegalArgumentException if the url could not be parsed
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*/
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public static double[] parseUri(Uri uri, boolean strict) throws IllegalArgumentException {
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if (uri == null)
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throw new IllegalArgumentException("no uri");
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// Try to extract coordinates in uri string with regexp
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Pattern pattern = strict ? PATTERN_GEO : PATTERN_BROAD;
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Matcher m = pattern.matcher(uri.toString());
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if (!m.find() || m.groupCount() != 2)
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throw new IllegalArgumentException("unable to parse uri: unable to find coordinates in uri");
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// Obtain coordinates from regexp result
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String sLat = m.group(1);
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String sLon = m.group(2);
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double[] coords = null;
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try {
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// Check coordinates are numeric
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coords = new double[]{Double.parseDouble(sLat), Double.parseDouble(sLon)};
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} catch (NumberFormatException e) {
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throw new IllegalArgumentException("unable to parse uri: coordinates are not double");
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}
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// Check coordinates validity
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String error = checkCoordsValidity(coords[0], coords[1]);
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if (error != null)
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throw new IllegalArgumentException(error);
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return coords;
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}
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public static Uri createGeoUri(double lat, double lon, String name) {
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String error = checkCoordsValidity(lat, lon);
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if (error != null)
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throw new IllegalArgumentException(error);
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String uriStr = "geo:" + lat + "," + lon;
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if (name != null)
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uriStr += "(" + name + ")";
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return Uri.parse(uriStr);
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}
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public static Uri createGmapsUri(double lat, double lon) {
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String error = checkCoordsValidity(lat, lon);
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if (error != null)
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throw new IllegalArgumentException(error);
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String uriStr = "https://www.google.com/maps/search/?api=1&query=" + lat + "," + lon;
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return Uri.parse(uriStr);
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}
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/**
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* Checks a latitude/longitude is valid
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* @param lat latitude
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* @param lon longitude
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* @return null if valid, a string containing an error otherwise
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*/
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private static String checkCoordsValidity(double lat, double lon) {
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// Check coords validity
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if (lon <= -180 || lon >= 180 )
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return "Invalid longitude: " + lon;
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if (lat <= -90 || lat >= 90)
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return "Invalid latitude: " + lat;
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return null;
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}
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}
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