Move coordinate logic to LatLng class

app/src/main/java/fr/free/nrw/commons/MediaDataExtractor.java

@@ -20,6 +20,7 @@ import javax.xml.parsers.DocumentBuilder;
 import javax.xml.parsers.DocumentBuilderFactory;
 import javax.xml.parsers.ParserConfigurationException;
 
+import fr.free.nrw.commons.location.LatLng;
 import timber.log.Timber;
 
 /**
@@ -251,18 +252,6 @@ public class MediaDataExtractor {
         return parentNode.getTextContent();
     }
 
-    /**
-     * Rounds the float to 4 digits.
-     *
-     * @param coordinate A coordinate value as string.
-     * @return String of the rounded number.
-     */
-    private String formatCoordinate(String coordinate) {
-        Float floatNumber = Float.parseFloat(coordinate);
-        double roundedNumber = Math.round(floatNumber * 10000d) / 10000d;
-        return String.valueOf(roundedNumber);
-    }
-
     /**
      * Extracts the coordinates from the template and returns them as pretty formatted string.
      * Loops over the children of the coordinate template:
@@ -275,9 +264,11 @@ public class MediaDataExtractor {
      */
     private String getCoordinates(Node parentNode) throws IOException {
         NodeList childNodes = parentNode.getChildNodes();
-        String latitudeText = formatCoordinate(childNodes.item(1).getTextContent());
-        String longitudeText = formatCoordinate(childNodes.item(2).getTextContent());
-        return latitudeText + " N," + longitudeText + " E";
+        double latitudeText = Double.parseDouble(childNodes.item(1).getTextContent());
+        double longitudeText = Double.parseDouble(childNodes.item(2).getTextContent());
+        LatLng coordinates = new LatLng(latitudeText, longitudeText);
+
+        return coordinates.getPrettyCoordinateString();
     }
 
     // Extract a dictionary of multilingual texts from a subset of the parse tree.

app/src/main/java/fr/free/nrw/commons/location/LatLng.java

@@ -42,4 +42,52 @@ public class LatLng {
     public String toString() {
         return "lat/lng: (" + this.latitude + "," + this.longitude + ")";
     }
+
+    /**
+     * Rounds the float to 4 digits.
+     *
+     * @param coordinate A coordinate value as string.
+     * @return String of the rounded number.
+     */
+    private String formatCoordinate(double coordinate) {
+        double roundedNumber = Math.round(coordinate * 10000d) / 10000d;
+        return String.valueOf(roundedNumber);
+    }
+
+    /**
+     * Returns "N" or "S" depending on the latitude.
+     *
+     * @return "N" or "S".
+     */
+    private String getNorthSouth() {
+        if (this.latitude < 0) {
+            return "S";
+        }
+
+        return "N";
+    }
+
+    /**
+     * Returns "E" or "W" depending on the longitude.
+     *
+     * @return "E" or "W".
+     */
+    private String getEastWest() {
+        if (this.longitude < 180) {
+            return "E";
+        }
+
+        return "W";
+    }
+
+    /**
+     * Returns a nicely formatted coordinate string. Used e.g. in
+     * the detail view.
+     *
+     * @return The formatted string.
+     */
+    public String getPrettyCoordinateString() {
+        return formatCoordinate(this.latitude) + " " + this.getNorthSouth() + ", " +
+               formatCoordinate(this.longitude) + " " + this.getEastWest();
+    }
 }