- improved logging

- fixed multiple problem with map sync
- added some "garbage collection" for unsubscribed connection data
- updated README.md

app/Data/Payload.php

@@ -0,0 +1,94 @@
+<?php
+
+
+namespace Exodus4D\Socket\Data;
+
+
+/**
+ * Class Payload
+ * @package Exodus4D\Socket\Data
+ * @property string $task
+ * @property mixed $load
+ */
+class Payload implements \JsonSerializable {
+
+    /**
+     * error message for missing 'task' name
+     */
+    const ERROR_TASK_MISSING        = "'task' must be a not empty string";
+
+    /**
+     * task name
+     * @var string
+     */
+    private $task = '';
+
+    /**
+     * payload data
+     * @var mixed
+     */
+    private $load;
+
+    /**
+     * optional characterId array -> recipients
+     * -> e.g if multiple browser tabs are open
+     * @var null|array
+     */
+    private $characterIds;
+
+    /**
+     * Payload constructor.
+     * @param string $task
+     * @param null $load
+     * @param array|null $characterIds
+     */
+    public function __construct(string $task, $load = null, ?array $characterIds = null){
+        $this->setTask($task);
+        $this->setLoad($load);
+        $this->setCharacterIds($characterIds);
+    }
+
+    /**
+     * @param string $task
+     */
+    public function setTask(string $task){
+        if($task){
+            $this->task = $task;
+        }else{
+            throw new \InvalidArgumentException(self::ERROR_TASK_MISSING);
+        }
+    }
+
+    /**
+     * @param null $load
+     */
+    public function setLoad($load = null){
+        $this->load = $load;
+    }
+
+    /**
+     * @param array|null $characterIds
+     */
+    public function setCharacterIds(?array $characterIds){
+        if(is_array($characterIds)){
+            $this->characterIds = $characterIds;
+        }else{
+            $this->characterIds = null;
+        }
+    }
+
+    /**
+     * @param $name
+     * @return mixed
+     */
+    public function __get($name){
+        return $this->$name;
+    }
+
+    /**
+     * @return array|mixed
+     */
+    public function jsonSerialize(){
+        return get_object_vars($this);
+    }
+}