drop-to-Drafts un-studies one card (new badge, clear due, remove anchor -> inert) (v1.1.4)

Helper/QualKardHelper.php

@@ -209,6 +209,25 @@ class QualKardHelper extends Base
         }
     }
 
+    /**
+     * Surgically un-study ONE card that the user dropped back into Drafts: wipe its mastery to
+     * unread, clear the due date, and make it inert to RecoReco. Unlike resetCard() this does not
+     * move or re-arm the card (it is already in Drafts and already armed) -- a lighter, per-card
+     * counterpart to the board-wide Reset.
+     *
+     * The anchor is REMOVED, not saved as 0: Kanboard's metadata save drops the string "0" (empty()),
+     * which would leave the old positive anchor in place and let RecoReco pull the card back out of
+     * Drafts on the next cron. A removed key reads back as the default 0, so RecoReco skips it.
+     *
+     * @param int $task_id
+     */
+    public function park($task_id)
+    {
+        $this->taskMetadataModel->save($task_id, array('qualkard_avg' => self::UNREAD)); // mastery -> new
+        $this->taskMetadataModel->remove($task_id, 'recoreco_anchor');                   // -> inert
+        $this->db->table(TaskModel::TABLE)->eq('id', $task_id)->update(array('date_due' => 0));
+    }
+
     /**
      * Grade a card by a score (a grade column's value): update the running average, compute the next
      * due date, and arm the anchor. RecoReco moves the card from here.