Added application and project roles validation for API procedure calls

app/Api/Procedure/TaskFileProcedure.php

@@ -0,0 +1,70 @@
+<?php
+
+namespace Kanboard\Api\Procedure;
+
+use Kanboard\Api\Authorization\ProjectAuthorization;
+use Kanboard\Api\Authorization\TaskAuthorization;
+use Kanboard\Api\Authorization\TaskFileAuthorization;
+use Kanboard\Core\ObjectStorage\ObjectStorageException;
+
+/**
+ * Task File API controller
+ *
+ * @package  Kanboard\Api\Procedure
+ * @author   Frederic Guillot
+ */
+class TaskFileProcedure extends BaseProcedure
+{
+    public function getTaskFile($file_id)
+    {
+        TaskFileAuthorization::getInstance($this->container)->check($this->getClassName(), 'getTaskFile', $file_id);
+        return $this->taskFileModel->getById($file_id);
+    }
+
+    public function getAllTaskFiles($task_id)
+    {
+        TaskAuthorization::getInstance($this->container)->check($this->getClassName(), 'getAllTaskFiles', $task_id);
+        return $this->taskFileModel->getAll($task_id);
+    }
+
+    public function downloadTaskFile($file_id)
+    {
+        TaskFileAuthorization::getInstance($this->container)->check($this->getClassName(), 'downloadTaskFile', $file_id);
+        
+        try {
+            $file = $this->taskFileModel->getById($file_id);
+
+            if (! empty($file)) {
+                return base64_encode($this->objectStorage->get($file['path']));
+            }
+        } catch (ObjectStorageException $e) {
+            $this->logger->error($e->getMessage());
+        }
+
+        return '';
+    }
+
+    public function createTaskFile($project_id, $task_id, $filename, $blob)
+    {
+        ProjectAuthorization::getInstance($this->container)->check($this->getClassName(), 'createTaskFile', $project_id);
+
+        try {
+            return $this->taskFileModel->uploadContent($task_id, $filename, $blob);
+        } catch (ObjectStorageException $e) {
+            $this->logger->error($e->getMessage());
+            return false;
+        }
+    }
+
+    public function removeTaskFile($file_id)
+    {
+        TaskFileAuthorization::getInstance($this->container)->check($this->getClassName(), 'removeTaskFile', $file_id);
+        return $this->taskFileModel->remove($file_id);
+    }
+
+    public function removeAllTaskFiles($task_id)
+    {
+        TaskAuthorization::getInstance($this->container)->check($this->getClassName(), 'removeAllTaskFiles', $task_id);
+        return $this->taskFileModel->removeAll($task_id);
+    }
+}