add connection manager and facade with implementation

composer.json

@@ -33,7 +33,10 @@
     "laravel": {
       "providers": [
         "PhpMqtt\\Client\\MqttClientServiceProvider"
-      ]
+      ],
+      "aliases": {
+        "MQTT": "PhpMqtt\\Client\\Facades\\MQTT"
+      }
     }
   }
-}
+}

config/mqtt-client.php

@@ -2,4 +2,55 @@
 
 declare(strict_types=1);
 
-return [];
+use PhpMqtt\Client\Repositories\MemoryRepository;
+
+return [
+
+    /*
+    |--------------------------------------------------------------------------
+    | Default MQTT Connection
+    |--------------------------------------------------------------------------
+    |
+    | This setting defines the default MQTT connection returned when requesting
+    | a connection without name from the facade.
+    |
+    */
+
+    'default_connection' => 'default',
+
+    /*
+    |--------------------------------------------------------------------------
+    | MQTT Connections
+    |--------------------------------------------------------------------------
+    |
+    | These are the MQTT connections used by the application. You can also open
+    | an individual connection from the application itself, but all connections
+    | defined here can be accessed via name conveniently.
+    |
+    */
+
+    'connections' => [
+        'default' => [
+            'host' => env('MQTT_HOST'),
+            'port' => env('MQTT_PORT', 1883),
+            'username' => env('MQTT_USERNAME'),
+            'password' => env('MQTT_PASSWORD'),
+            'client_id' => env('MQTT_CLIENT_ID'),
+            'cafile' => env('MQTT_CAFILE'),
+            'clean_session' => env('MQTT_CLEAN_SESSION', true),
+            'logging_enabled' => env('MQTT_LOGGING', true),
+            'repository' => MemoryRepository::class,
+            'settings' => [
+                'quality_of_service' => env('MQTT_QUALITY_OF_SERVICE', 0),
+                'block_socket' => env('MQTT_BLOCK_SOCKET', false),
+                'keep_alive' => env('MQTT_KEEP_ALIVE', 10),
+                'socket_timeout' => env('MQTT_TIMEOUT', 5),
+                'resend_timeout' => env('MQTT_RESEND_TIMEOUT', 10),
+                'retain' => env('MQTT_RETAIN', false),
+                'last_will_topic' => env('MQTT_WILL_TOPIC'),
+                'last_will_message' => env('MQTT_WILL_MESSAGE'),
+            ],
+        ],
+    ],
+
+];

src/ConnectionManager.php

@@ -0,0 +1,160 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PhpMqtt\Client;
+
+use Illuminate\Contracts\Container\BindingResolutionException;
+use Illuminate\Contracts\Foundation\Application;
+use PhpMqtt\Client\Contracts\Repository;
+use PhpMqtt\Client\Exceptions\ConnectingToBrokerFailedException;
+use PhpMqtt\Client\Exceptions\ConnectionNotAvailableException;
+use PhpMqtt\Client\Exceptions\DataTransferException;
+
+/**
+ * Manages the MQTT connections of the application.
+ *
+ * @package PhpMqtt\Client
+ */
+class ConnectionManager
+{
+    /** @var Application */
+    protected $application;
+
+    /** @var array */
+    protected $config;
+
+    /** @var string */
+    protected $defaultConnection;
+
+    /** @var MQTTClient[] */
+    protected $connections = [];
+
+    /**
+     * ConnectionManager constructor.
+     *
+     * @param Application $application
+     * @param array       $config
+     */
+    public function __construct(Application $application, array $config)
+    {
+        $this->application       = $application;
+        $this->config            = $config;
+        $this->defaultConnection = array_get($config, 'default_connection', 'default');
+    }
+
+    /**
+     * Gets the connection with the specified name.
+     *
+     * @param string|null $name
+     * @return MQTTClient
+     * @throws BindingResolutionException
+     * @throws ConnectingToBrokerFailedException
+     * @throws ConnectionNotAvailableException
+     */
+    public function connection(string $name = null): MQTTClient
+    {
+        if ($name === null) {
+            $name = $this->defaultConnection;
+        }
+
+        if (!array_key_exists($name, $this->connections)) {
+            $this->connections[$name] = $this->createConnection($name);
+        }
+
+        return $this->connections[$name];
+    }
+
+    /**
+     * Closes the given connection if opened.
+     *
+     * @param string|null $connection
+     * @throws DataTransferException
+     */
+    public function close(string $connection = null): void
+    {
+        if ($connection === null) {
+            $connection = $this->defaultConnection;
+        }
+
+        if (array_key_exists($connection, $this->connections)) {
+            $this->connections[$connection]->close();
+            unset($this->connections[$connection]);
+        }
+    }
+
+    /**
+     * Publishes a message on the given connection. The QoS level will be 0
+     * and the message will not be retained by the broker.
+     *
+     * @param string      $topic
+     * @param string      $message
+     * @param string|null $connection
+     * @throws BindingResolutionException
+     * @throws ConnectingToBrokerFailedException
+     * @throws ConnectionNotAvailableException
+     * @throws DataTransferException
+     */
+    public function publish(string $topic, string $message, string $connection = null): void
+    {
+        $client = $this->connection($connection);
+
+        $client->publish($topic, $message);
+    }
+
+    /**
+     * Creates a new MQTT client and connects to the specified server.
+     *
+     * @param string $name
+     * @return MQTTClient
+     * @throws BindingResolutionException
+     * @throws ConnectingToBrokerFailedException
+     * @throws ConnectionNotAvailableException
+     */
+    protected function createConnection(string $name): MQTTClient
+    {
+        $config = array_get($this->config, "connections.{$name}");
+        if ($config === null) {
+            throw new ConnectionNotAvailableException($name);
+        }
+
+        $host           = array_get($config, 'host');
+        $port           = array_get($config, 'port', 1883);
+        $username       = array_get($config, 'username');
+        $password       = array_get($config, 'password');
+        $clientId       = array_get($config, 'client_id');
+        $caFile         = array_get($config, 'cafile');
+        $cleanSession   = array_get($config, 'clean_session', true);
+        $loggingEnabled = array_get($config, 'logging_enabled', true);
+        $repository     = array_get($config, 'repository', Repository::class);
+
+        $settings   = $this->parseConnectionSettings(array_get($config, 'settings', []));
+        $repository = $this->application->make($repository);
+        $logger     = $loggingEnabled ? $this->application->make('log') : null;
+
+        $client = new MQTTClient($host, $port, $clientId, $caFile, $repository, $logger);
+        $client->connect($username, $password, $settings, $cleanSession);
+
+        return $client;
+    }
+
+    /**
+     * Parses the given settings and returns a populated settings object.
+     *
+     * @param array $settings
+     * @return ConnectionSettings
+     */
+    protected function parseConnectionSettings(array $settings): ConnectionSettings
+    {
+        $qos             = array_get($settings, 'quality_of_service', 0);
+        $blockSocket     = array_get($settings, 'block_socket', false);
+        $keepAlive       = array_get($settings, 'keep_alive', 10);
+        $socketTimeout   = array_get($settings, 'socket_timeout', 5);
+        $resendTimeout   = array_get($settings, 'resend_timeout', 10);
+        $retain          = array_get($settings, 'retain', false);
+        $lastWillTopic   = array_get($settings, 'last_will_topic');
+        $lastWillMessage = array_get($settings, 'last_will_message');
+
+        return new ConnectionSettings($qos, $retain, $blockSocket, $socketTimeout, $keepAlive, $resendTimeout, $lastWillTopic, $lastWillMessage);
+    }
+}

src/Exceptions/ConnectionNotAvailableException.php

@@ -0,0 +1,18 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PhpMqtt\Client\Exceptions;
+
+/**
+ * Class ConnectionNotAvailableException
+ *
+ * @package PhpMqtt\Client\Exceptions
+ */
+class ConnectionNotAvailableException extends MQTTClientException
+{
+    public function __construct(string $name)
+    {
+        parent::__construct(sprintf('An MQTT connection with the name [%s] could not be found.', $name));
+    }
+}

src/Facades/MQTT.php

@@ -0,0 +1,30 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PhpMqtt\Client\Facades;
+
+use Illuminate\Support\Facades\Facade;
+use PhpMqtt\Client\ConnectionManager;
+use PhpMqtt\Client\MQTTClient;
+
+/**
+ * @method static MQTTClient connection(string $name = null)
+ * @method static void close(string $connection = null)
+ * @method static void publish(string $topic, string $message, string $connection = null)
+ *
+ * @see ConnectionManager
+ * @package PhpMqtt\Client\Facades
+ */
+class MQTT extends Facade
+{
+    /**
+     * Get the registered name of the component.
+     *
+     * @return string
+     */
+    protected static function getFacadeAccessor()
+    {
+        return ConnectionManager::class;
+    }
+}

src/MqttClientServiceProvider.php

@@ -2,6 +2,7 @@
 
 namespace PhpMqtt\Client;
 
+use Illuminate\Contracts\Foundation\Application;
 use Illuminate\Support\ServiceProvider;
 
 /**
@@ -11,23 +12,6 @@ use Illuminate\Support\ServiceProvider;
  */
 class MqttClientServiceProvider extends ServiceProvider
 {
-    /**
-     * Indicates if loading of the provider is deferred.
-     *
-     * @var bool
-     */
-    protected $defer = false;
-
-    /**
-     * Bootstrap the application events.
-     *
-     * @return void
-     */
-    public function boot(): void
-    {
-        $this->handleConfigs();
-    }
-
     /**
      * Register the service provider.
      *
@@ -35,17 +19,8 @@ class MqttClientServiceProvider extends ServiceProvider
      */
     public function register(): void
     {
-        // Bind any implementations.
-    }
-
-    /**
-     * Get the services provided by the provider.
-     *
-     * @return array
-     */
-    public function provides(): array
-    {
-        return [];
+        $this->registerConfig();
+        $this->registerServices();
     }
 
     /**
@@ -53,12 +28,27 @@ class MqttClientServiceProvider extends ServiceProvider
      *
      * @return void
      */
-    protected function handleConfigs(): void
+    protected function registerConfig(): void
     {
         $configPath = __DIR__ . '/../config/mqtt-client.php';
 
-        $this->publishes([$configPath => config_path('mqtt-client.php')], 'config');
+        if ($this->app->runningInConsole()) {
+            $this->publishes([$configPath => config_path('mqtt-client.php')], 'config');
+        }
 
         $this->mergeConfigFrom($configPath, 'mqtt-client');
     }
+
+    /**
+     * Registers the services offered by this package.
+     *
+     * @return void
+     */
+    protected function registerServices(): void
+    {
+        $this->app->bind(ConnectionManager::class, function (Application $app) {
+            $config = $app->make('config')->get('mqtt-client', []);
+            return new ConnectionManager($app, $config);
+        });
+    }
 }