1 files changed, 140 insertions, 0 deletions
diff --git a/app/Filter/TaskSubtaskAssigneeFilter.php b/app/Filter/TaskSubtaskAssigneeFilter.php
new file mode 100644
index 00000000..4c757315
--- /dev/null
+++ b/app/Filter/TaskSubtaskAssigneeFilter.php
@@ -0,0 +1,140 @@
+<?php
+
+namespace Kanboard\Filter;
+
+use Kanboard\Core\Filter\FilterInterface;
+use Kanboard\Model\Subtask;
+use Kanboard\Model\Task;
+use Kanboard\Model\User;
+use PicoDb\Database;
+use PicoDb\Table;
+
+/**
+ * Filter tasks by subtasks assignee
+ *
+ * @package filter
+ * @author  Frederic Guillot
+ */
+class TaskSubtaskAssigneeFilter extends BaseFilter implements FilterInterface
+{
+    /**
+     * Database object
+     *
+     * @access private
+     * @var Database
+     */
+    private $db;
+
+    /**
+     * Current user id
+     *
+     * @access private
+     * @var int
+     */
+    private $currentUserId = 0;
+
+    /**
+     * Set current user id
+     *
+     * @access public
+     * @param  integer $userId
+     * @return TaskSubtaskAssigneeFilter
+     */
+    public function setCurrentUserId($userId)
+    {
+        $this->currentUserId = $userId;
+        return $this;
+    }
+
+    /**
+     * Set database object
+     *
+     * @access public
+     * @param  Database $db
+     * @return TaskSubtaskAssigneeFilter
+     */
+    public function setDatabase(Database $db)
+    {
+        $this->db = $db;
+        return $this;
+    }
+
+    /**
+     * Get search attribute
+     *
+     * @access public
+     * @return string[]
+     */
+    public function getAttributes()
+    {
+        return array('subtask:assignee');
+    }
+
+    /**
+     * Apply filter
+     *
+     * @access public
+     * @return string
+     */
+    public function apply()
+    {
+        $task_ids = $this->getSubQuery()->findAllByColumn('task_id');
+
+        if (! empty($task_ids)) {
+            $this->query->in(Task::TABLE.'.id', $task_ids);
+        } else {
+            $this->query->eq(Task::TABLE.'.id', 0); // No match
+        }
+    }
+
+    /**
+     * Get subquery
+     *
+     * @access protected
+     * @return Table
+     */
+    protected function getSubQuery()
+    {
+        $subquery = $this->db->table(Subtask::TABLE)
+            ->columns(
+                Subtask::TABLE.'.user_id',
+                Subtask::TABLE.'.task_id',
+                User::TABLE.'.name',
+                User::TABLE.'.username'
+            )
+            ->join(User::TABLE, 'id', 'user_id', Subtask::TABLE)
+            ->neq(Subtask::TABLE.'.status', Subtask::STATUS_DONE);
+
+        return $this->applySubQueryFilter($subquery);
+    }
+
+    /**
+     * Apply subquery filter
+     *
+     * @access protected
+     * @param  Table $subquery
+     * @return Table
+     */
+    protected function applySubQueryFilter(Table $subquery)
+    {
+        if (is_int($this->value) || ctype_digit($this->value)) {
+            $subquery->eq(Subtask::TABLE.'.user_id', $this->value);
+        } else {
+            switch ($this->value) {
+                case 'me':
+                    $subquery->eq(Subtask::TABLE.'.user_id', $this->currentUserId);
+                    break;
+                case 'nobody':
+                    $subquery->eq(Subtask::TABLE.'.user_id', 0);
+                    break;
+                default:
+                    $subquery->beginOr();
+                    $subquery->ilike(User::TABLE.'.username', $this->value.'%');
+                    $subquery->ilike(User::TABLE.'.name', '%'.$this->value.'%');
+                    $subquery->closeOr();
+            }
+        }
+
+        return $subquery;
+    }
+}