File events refactoring

app/EventBuilder/ProjectFileEventBuilder.php

@@ -0,0 +1,50 @@
+<?php
+
+namespace Kanboard\EventBuilder;
+
+use Kanboard\Event\ProjectFileEvent;
+use Kanboard\Event\GenericEvent;
+
+/**
+ * Class ProjectFileEventBuilder
+ *
+ * @package Kanboard\EventBuilder
+ * @author  Frederic Guillot
+ */
+class ProjectFileEventBuilder extends BaseEventBuilder
+{
+    protected $fileId = 0;
+
+    /**
+     * Set fileId
+     *
+     * @param  int $fileId
+     * @return $this
+     */
+    public function withFileId($fileId)
+    {
+        $this->fileId = $fileId;
+        return $this;
+    }
+
+    /**
+     * Build event data
+     *
+     * @access public
+     * @return GenericEvent|null
+     */
+    public function build()
+    {
+        $file = $this->projectFileModel->getById($this->fileId);
+
+        if (empty($file)) {
+            $this->logger->debug(__METHOD__.': File not found');
+            return null;
+        }
+
+        return new ProjectFileEvent(array(
+            'file' => $file,
+            'project' => $this->projectModel->getById($file['project_id']),
+        ));
+    }
+}