fist draft

src/Serializer/Handler/DependsHandler.php

@@ -0,0 +1,101 @@
+<?php
+
+namespace DavidBadura\Taskwarrior\Serializer\Handler;
+
+use DavidBadura\Taskwarrior\Exception\ReferenceException;
+use DavidBadura\Taskwarrior\Task;
+use DavidBadura\Taskwarrior\TaskManager;
+use Doctrine\Common\Collections\ArrayCollection;
+use JMS\Serializer\Context;
+use JMS\Serializer\GraphNavigator;
+use JMS\Serializer\Handler\SubscribingHandlerInterface;
+use JMS\Serializer\VisitorInterface;
+
+/**
+ * @author David Badura <d.a.badura@gmail.com>
+ */
+class DependsHandler implements SubscribingHandlerInterface
+{
+    /**
+     * @var TaskManager
+     */
+    protected $taskManager;
+
+    /**
+     * @param TaskManager $taskManager
+     */
+    function __construct(TaskManager $taskManager)
+    {
+        $this->taskManager = $taskManager;
+    }
+
+    /**
+     * @return array
+     */
+    public static function getSubscribingMethods()
+    {
+        $methods = array();
+
+        $methods[] = array(
+            'type'      => 'Depends',
+            'format'    => 'json',
+            'direction' => GraphNavigator::DIRECTION_DESERIALIZATION,
+            'method'    => 'deserializeCarbon'
+        );
+
+        $methods[] = array(
+            'type'      => 'Depends',
+            'format'    => 'json',
+            'direction' => GraphNavigator::DIRECTION_SERIALIZATION,
+            'method'    => 'serializeCarbon'
+        );
+
+        return $methods;
+    }
+
+    /**
+     * @param VisitorInterface $visitor
+     * @param Task[] $tasks
+     * @param array $type
+     * @param Context $context
+     * @return string
+     * @throws ReferenceException
+     */
+    public function serializeCarbon(VisitorInterface $visitor, $tasks, array $type, Context $context)
+    {
+        $list = [];
+
+        foreach ($tasks as $task) {
+            if (!$task->getUuid()) {
+                throw new ReferenceException("you can't save a task that has dependencies to tasks that have not been saved");
+            }
+
+            $list[] = $task->getUuid();
+        }
+
+        return $visitor->visitString(implode(',', $list), $type, $context);
+    }
+
+    /**
+     * @param VisitorInterface $visitor
+     * @param string $data
+     * @param array $type
+     * @return ArrayCollection
+     */
+    public function deserializeCarbon(VisitorInterface $visitor, $data, array $type)
+    {
+        dump($data);
+
+        if (!$data) {
+            return new ArrayCollection();
+        }
+
+        $tasks = [];
+
+        foreach (explode(',', $data) as $uuid) {
+            $tasks[] = $this->taskManager->getReference($uuid);
+        }
+
+        return new ArrayCollection($tasks);
+    }
+}