Add PositionStack geocoder

2 files changed, 62 insertions, 0 deletions

diff --git a/src/main/java/org/traccar/geocoder/JsonGeocoder.java b/src/main/java/org/traccar/geocoder/JsonGeocoder.java
index ed59a1d8d..8c442def3 100644
--- a/src/main/java/org/traccar/geocoder/JsonGeocoder.java
+++ b/src/main/java/org/traccar/geocoder/JsonGeocoder.java
@@ -50,6 +50,13 @@ public abstract class JsonGeocoder implements Geocoder {
         }
     }
 
+    protected String readValue(JsonObject object, String key) {
+        if (object.containsKey(key) && !object.isNull(key)) {
+            return object.getString(key);
+        }
+        return null;
+    }
+
     private String handleResponse(
             double latitude, double longitude, JsonObject json, ReverseGeocoderCallback callback) {
 
diff --git a/src/main/java/org/traccar/geocoder/PositionStackGeocoder.java b/src/main/java/org/traccar/geocoder/PositionStackGeocoder.java
new file mode 100644
index 000000000..2674a68ca
--- /dev/null
+++ b/src/main/java/org/traccar/geocoder/PositionStackGeocoder.java
@@ -0,0 +1,55 @@
+/*
+ * Copyright 2020 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.geocoder;
+
+import javax.json.JsonArray;
+import javax.json.JsonObject;
+
+public class PositionStackGeocoder extends JsonGeocoder {
+
+    private static String formatUrl(String key) {
+        return "http://api.positionstack.com/v1/reverse?access_key=" + key + "&query=%f,%f";
+    }
+
+    public PositionStackGeocoder(String key, int cacheSize, AddressFormat addressFormat) {
+        super(formatUrl(key), cacheSize, addressFormat);
+    }
+
+    @Override
+    public Address parseAddress(JsonObject json) {
+        JsonArray result = json.getJsonArray("data");
+
+        if (result != null && !result.isEmpty()) {
+            JsonObject record = result.getJsonObject(0);
+
+            Address address = new Address();
+
+            address.setFormattedAddress(readValue(record, "label"));
+            address.setHouse(readValue(record, "number"));
+            address.setStreet(readValue(record, "street"));
+            address.setSuburb(readValue(record, "neighbourhood"));
+            address.setSettlement(readValue(record, "locality"));
+            address.setState(readValue(record, "region"));
+            address.setCountry(readValue(record, "country_code"));
+            address.setPostcode(readValue(record, "postal_code"));
+
+            return address;
+        }
+
+        return null;
+    }
+
+}