From d610b1ab5135503d1d39aa291190a860ddb952a9 Mon Sep 17 00:00:00 2001
From: Anton Tananaev <anton.tananaev@gmail.com>
Date: Sun, 24 Feb 2019 15:12:26 -0800
Subject: Refactor geocoder handler

---
 src/org/traccar/handler/GeocoderHandler.java | 94 ++++++++++++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100644 src/org/traccar/handler/GeocoderHandler.java

(limited to 'src/org/traccar/handler/GeocoderHandler.java')

diff --git a/src/org/traccar/handler/GeocoderHandler.java b/src/org/traccar/handler/GeocoderHandler.java
new file mode 100644
index 000000000..b96f01b3a
--- /dev/null
+++ b/src/org/traccar/handler/GeocoderHandler.java
@@ -0,0 +1,94 @@
+/*
+ * Copyright 2012 - 2019 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.handler;
+
+import io.netty.channel.ChannelHandler;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelInboundHandlerAdapter;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.traccar.Context;
+import org.traccar.config.Config;
+import org.traccar.config.Keys;
+import org.traccar.database.IdentityManager;
+import org.traccar.database.StatisticsManager;
+import org.traccar.geocoder.Geocoder;
+import org.traccar.model.Position;
+
+@ChannelHandler.Sharable
+public class GeocoderHandler extends ChannelInboundHandlerAdapter {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(GeocoderHandler.class);
+
+    private final Geocoder geocoder;
+    private final IdentityManager identityManager;
+    private final StatisticsManager statisticsManager;
+    private final boolean ignorePositions;
+    private final boolean processInvalidPositions;
+    private final int geocoderReuseDistance;
+
+    public GeocoderHandler(
+            Config config, Geocoder geocoder, IdentityManager identityManager, StatisticsManager statisticsManager) {
+        this.geocoder = geocoder;
+        this.identityManager = identityManager;
+        this.statisticsManager = statisticsManager;
+        ignorePositions = Context.getConfig().getBoolean(Keys.GEOCODER_IGNORE_POSITIONS);
+        processInvalidPositions = config.getBoolean(Keys.GEOCODER_PROCESS_INVALID_POSITIONS);
+        geocoderReuseDistance = config.getInteger(Keys.GEOCODER_REUSE_DISTANCE, 0);
+    }
+
+    @Override
+    public void channelRead(final ChannelHandlerContext ctx, Object message) {
+        if (message instanceof Position && !ignorePositions) {
+            final Position position = (Position) message;
+            if (processInvalidPositions || position.getValid()) {
+                if (geocoderReuseDistance != 0) {
+                    Position lastPosition = identityManager.getLastPosition(position.getDeviceId());
+                    if (lastPosition != null && lastPosition.getAddress() != null
+                            && position.getDouble(Position.KEY_DISTANCE) <= geocoderReuseDistance) {
+                        position.setAddress(lastPosition.getAddress());
+                        ctx.fireChannelRead(position);
+                        return;
+                    }
+                }
+
+                if (statisticsManager != null) {
+                    statisticsManager.registerGeocoderRequest();
+                }
+
+                geocoder.getAddress(position.getLatitude(), position.getLongitude(),
+                        new Geocoder.ReverseGeocoderCallback() {
+                    @Override
+                    public void onSuccess(String address) {
+                        position.setAddress(address);
+                        ctx.fireChannelRead(position);
+                    }
+
+                    @Override
+                    public void onFailure(Throwable e) {
+                        LOGGER.warn("Geocoding failed", e);
+                        ctx.fireChannelRead(position);
+                    }
+                });
+            } else {
+                ctx.fireChannelRead(position);
+            }
+        } else {
+            ctx.fireChannelRead(message);
+        }
+    }
+
+}
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