Added search in activity stream

app/Filter/ProjectActivityTaskStatusFilter.php

@@ -0,0 +1,43 @@
+<?php
+
+namespace Kanboard\Filter;
+
+use Kanboard\Core\Filter\FilterInterface;
+use Kanboard\Model\Task;
+
+/**
+ * Filter activity events by task status
+ *
+ * @package filter
+ * @author  Frederic Guillot
+ */
+class ProjectActivityTaskStatusFilter extends BaseFilter implements FilterInterface
+{
+    /**
+     * Get search attribute
+     *
+     * @access public
+     * @return string[]
+     */
+    public function getAttributes()
+    {
+        return array('status');
+    }
+
+    /**
+     * Apply filter
+     *
+     * @access public
+     * @return FilterInterface
+     */
+    public function apply()
+    {
+        if ($this->value === 'open') {
+            $this->query->eq(Task::TABLE.'.is_active', Task::STATUS_OPEN);
+        } elseif ($this->value === 'closed') {
+            $this->query->eq(Task::TABLE.'.is_active', Task::STATUS_CLOSED);
+        }
+
+        return $this;
+    }
+}