From 34857cb82abb413100fa4aed668cdca7761e54c4 Mon Sep 17 00:00:00 2001
From: Supriyo <hisupriyooo@gmail.com>
Date: Mon, 11 Mar 2024 13:09:38 +0530
Subject: feat: add configuration for event forwarding with mqtt

---
 src/main/java/org/traccar/helper/MqttUtil.java | 83 ++++++++++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100644 src/main/java/org/traccar/helper/MqttUtil.java

(limited to 'src/main/java/org/traccar/helper/MqttUtil.java')

diff --git a/src/main/java/org/traccar/helper/MqttUtil.java b/src/main/java/org/traccar/helper/MqttUtil.java
new file mode 100644
index 000000000..54167f65c
--- /dev/null
+++ b/src/main/java/org/traccar/helper/MqttUtil.java
@@ -0,0 +1,83 @@
+/*
+ * Copyright 2023 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.helper;
+
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.util.UUID;
+import java.util.function.BiConsumer;
+
+import com.hivemq.client.mqtt.datatypes.MqttQos;
+import com.hivemq.client.mqtt.mqtt3.Mqtt3AsyncClient;
+import com.hivemq.client.mqtt.mqtt3.Mqtt3Client;
+import com.hivemq.client.mqtt.mqtt3.Mqtt3ClientBuilder;
+import com.hivemq.client.mqtt.mqtt3.message.auth.Mqtt3SimpleAuth;
+import com.hivemq.client.mqtt.mqtt3.message.publish.Mqtt3Publish;
+
+public final class MqttUtil {
+
+    private MqttUtil() {
+
+    }
+
+    public static Mqtt3AsyncClient createClient(final String url) {
+        URI uri;
+        try {
+            uri = new URI(url);
+        } catch (URISyntaxException e) {
+            throw new RuntimeException(e);
+        }
+
+        final Mqtt3SimpleAuth simpleAuth = getSimpleAuth(uri);
+
+        final String host = uri.getHost();
+        final int port = uri.getPort();
+        final Mqtt3ClientBuilder builder = Mqtt3Client.builder().identifier("traccar-" + UUID.randomUUID())
+                .serverHost(host).serverPort(port).simpleAuth(simpleAuth).automaticReconnectWithDefaultConfig();
+        final Mqtt3AsyncClient client;
+        
+        client = builder.buildAsync();
+        
+
+        client.connectWith().send().whenComplete((message, e) -> {
+            throw new RuntimeException(e);
+        });
+
+        return client;
+    }
+
+    private static Mqtt3SimpleAuth getSimpleAuth(final URI uri) {
+        final String userInfo = uri.getUserInfo();
+        Mqtt3SimpleAuth simpleAuth = null;
+        if (userInfo != null) {
+            int delimiter = userInfo.indexOf(':');
+            if (delimiter == -1) {
+                throw new IllegalArgumentException("Wrong MQTT credentials. Should be in format \"username:password\"");
+            } else {
+                simpleAuth = Mqtt3SimpleAuth.builder().username(userInfo.substring(0, delimiter++))
+                        .password(userInfo.substring(delimiter).getBytes()).build();
+            }
+        }
+        return simpleAuth;
+    }
+
+    public static void publish(final Mqtt3AsyncClient client, final String pubTopic, final String payload,
+            final BiConsumer<? super Mqtt3Publish, ? super Throwable> whenComplete) {
+        client.publishWith().topic(pubTopic).qos(MqttQos.AT_LEAST_ONCE).payload(payload.getBytes()).send()
+                .whenComplete(whenComplete);
+    }
+
+}
\ No newline at end of file
-- 
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