Added Location Detector Class

src/analytics/LocationDetector.java

@@ -0,0 +1,101 @@
+package analytics;
+
+import org.apache.http.HttpEntity;
+import org.apache.http.client.HttpClient;
+import org.apache.http.client.methods.HttpGet;
+import org.apache.http.impl.client.HttpClients;
+import org.apache.http.util.EntityUtils;
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.io.IOException;
+
+/**
+ * Created by platico on 5/11/16.
+ */
+public class LocationDetector {
+
+    private static final HttpClient defaultHttpClient = HttpClients.createDefault();
+    private static final String API_KEY = "AIzaSyC3tKP3j78TJNG9CqxujOeoUrZrqB_ewfY";    //the api key
+
+    /**
+     * Method used in order to get country of a specific city using the Google Maps API
+     *
+     * @param city to be searched
+     * @return  the name of the city if the city was found OR empty string if the city was NOT found
+     */
+    public static String getCountryOf(String city){
+
+        String url = String.format("http://maps.googleapis.com/maps/api/geocode/json?address="+city+"&sensor=false"+"?key="+API_KEY);
+        HttpGet httpGet = new HttpGet(url);
+        String country = "";
+
+        try {
+            HttpEntity entity = defaultHttpClient.execute(httpGet).getEntity();
+            String retSrc = EntityUtils.toString(entity);
+            JSONObject jsonObject = new JSONObject(retSrc); //Convert String to JSON Object
+            country = parseJSONforCountry(jsonObject);   //passes json to be parsed
+            if(country.equals("")){
+                System.out.println("Could not find country for: "+city);
+            }
+            else{
+                System.out.println("City: "+city);
+                System.out.println("Country: "+country);
+            }
+        } catch (IOException e) {
+            e.printStackTrace();
+        } catch (JSONException e) {
+            e.printStackTrace();
+        }
+
+        return country;
+
+
+    }
+
+    /**
+     * Method used in order to parse JSON file and get the country of the city
+     *
+     * @param jsonObject
+     *
+     * @return country name if country found OR empty string if country not found
+     */
+    private static String parseJSONforCountry(JSONObject jsonObject){
+
+        try {
+
+            JSONArray resultsArray = jsonObject.getJSONArray("results");
+            if (resultsArray.length() > 0) {    //if it returned results for the specific city
+                JSONObject firstResult = resultsArray.getJSONObject(0);     //gets the first results
+                JSONArray addressComponentsArray = firstResult.getJSONArray("address_components");
+                String country = "";
+                for (int i = 0; i < addressComponentsArray.length(); i++) {
+                    JSONObject countryObject = addressComponentsArray.getJSONObject(i);     //gets the object
+                    JSONArray typeArray = countryObject.getJSONArray("types");
+                    if (typeArray.get(0).equals("country")) {     //if this JSONObject is a country object
+                        country = countryObject.getString("long_name");
+                        break;   //breaks out of the loop
+                    }
+
+                }
+                if (country.equals("")) {
+                    return "";  //if no country found returns empty string
+                } else {
+                    return country;
+                }
+            } else {
+                return "";  //if no country found returns empty string
+            }
+
+        } catch (JSONException e) {
+            e.printStackTrace();
+        }
+
+        return "";  //if no country found returns empty string
+
+    }
+
+
+
+}