Started implementing ControllerHandler.

ControllerHandler is a standard utility handler for MVCR Controllers. This allows the user to create a task which is handled by a standardized controller.
Not finished yet! Needs some love.

Dockerfile

@@ -1,7 +1,7 @@
 FROM php:7.3-cli-buster
 
 RUN apt-get update &&\
-    apt-get install --no-install-recommends --assume-yes --quiet procps ca-certificates curl git &&\
+    apt-get install --no-install-recommends --assume-yes --quiet procps ca-certificates curl git unzip &&\
     rm -rf /var/lib/apt/lists/*
 
 # Install Redis

composer.json

@@ -19,7 +19,8 @@
     "ext-redis": "*"
   },
   "require-dev": {
-    "fuzeworks/tracycomponent": "~1.2.0"
+    "fuzeworks/tracycomponent": "~1.2.0",
+    "fuzeworks/mvcr": "~1.2.0"
   },
   "autoload": {
     "psr-4": {

src/FuzeWorks/Async/Handler/ControllerHandler.php

@@ -0,0 +1,175 @@
+<?php
+/**
+ * FuzeWorks Async Library
+ *
+ * The FuzeWorks PHP FrameWork
+ *
+ * Copyright (C) 2013-2020 TechFuze
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * @author    TechFuze
+ * @copyright Copyright (c) 2013 - 2020, TechFuze. (http://techfuze.net)
+ * @license   https://opensource.org/licenses/MIT MIT License
+ *
+ * @link  http://techfuze.net/fuzeworks
+ * @since Version 1.0.0
+ *
+ * @version Version 1.0.0
+ */
+
+namespace FuzeWorks\Async\Handler;
+use FuzeWorks\Async\Handler;
+use FuzeWorks\Async\Task;
+use FuzeWorks\Async\TasksException;
+use FuzeWorks\Controller;
+use FuzeWorks\Controllers;
+use FuzeWorks\Exception\ControllerException;
+use FuzeWorks\Exception\FactoryException;
+use FuzeWorks\Exception\NotFoundException;
+use FuzeWorks\Factory;
+
+class ControllerHandler implements Handler
+{
+
+    /**
+     * @var string Name of the controller used to handle the task
+     */
+    protected $controllerName;
+
+    /**
+     * @var string The specific method to handle the task
+     */
+    protected $controllerMethod;
+
+    /**
+     * @var string|null The method used to handle the post phase; if requested
+     */
+    protected $postMethod = null;
+
+    protected $output;
+    protected $postOutput;
+
+    /**
+     * @inheritDoc
+     * @throws TasksException
+     */
+    public function primaryHandler(Task $task): bool
+    {
+        // Set the arguments
+        $args = $this->setArguments($task);
+
+        // First we fetch the controller
+        $controller = $this->getController($this->controllerName);
+
+        // Check if method exists
+        if (!method_exists($controller, $this->controllerMethod))
+            throw new TasksException("Could not handle task. Method '$this->controllerMethod' not found on controller.");
+
+        // Call method and collect output
+        $this->output = $controller->{$this->controllerMethod}(...$args);
+        return true;
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function getOutput()
+    {
+        return $this->output;
+    }
+
+    /**
+     * @inheritDoc
+     * @throws TasksException
+     */
+    public function postHandler(Task $task)
+    {
+        // Set the arguments
+        $args = $this->setArguments($task);
+
+        // Abort if no postMethod exists
+        if (is_null($this->postMethod))
+            throw new TasksException("Could not handle task. No post method provided.");
+
+        // First we fetch the controller
+        $controller = $this->getController($this->controllerName);
+
+        // Check if method exists
+        if (!method_exists($controller, $this->postMethod))
+            throw new TasksException("Could not handle task. Post method '$this->postMethod' not found on controller.");
+
+        // Call method and collect output
+        $this->postOutput = $controller->{$this->postMethod}($task);
+        return true;
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function getPostOutput()
+    {
+        return $this->postOutput;
+    }
+
+    /**
+     * Set the arguments of this handler using the provided task
+     *
+     * @param Task $task
+     * @return array
+     * @throws TasksException
+     */
+    private function setArguments(Task $task): array
+    {
+        // Direct arguments
+        $args = $task->getArguments();
+        if (count($args) < 3)
+            throw new TasksException("Could not handle task. Not enough arguments provided.");
+
+        // First argument: controllerName
+        $this->controllerName = $args[0];
+        $this->controllerMethod = $args[1];
+        $this->postMethod = isset($args[2]) ? $args[2] : null;
+
+        return !isset($args[2]) ? [] : array_slice(func_get_args(), 3);
+    }
+
+    /**
+     * @param string $controllerName
+     * @return Controller
+     * @throws TasksException
+     */
+    private function getController(string $controllerName): Controller
+    {
+        // First load the controllers component
+        try {
+            /** @var Controllers $controllers */
+            $controllers = Factory::getInstance('controllers');
+
+            // Load the requested controller
+            return $controllers->get($controllerName);
+        } catch (FactoryException $e) {
+            throw new TasksException("Could not get controller. FuzeWorks\MVCR is not installed!");
+        } catch (ControllerException $e) {
+            throw new TasksException("Could not get controller. Controller threw exception: '" . $e->getMessage() . "'");
+        } catch (NotFoundException $e) {
+            throw new TasksException("Could not get controller. Controller was not found.");
+        }
+    }
+}