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PonderAnswerCommentController.php
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			<?php

			final class PonderAnswerCommentController extends PonderController {

			public function handleRequest(AphrontRequest $request) {
			$viewer = $request->getViewer();
			$id = $request->getURIData('id');

			if (!$request->isFormPost()) {
			return new Aphront400Response();
			}

			$answer = id(new PonderAnswerQuery())
			->setViewer($viewer)
			->withIDs(array($id))
			->executeOne();
			if (!$answer) {
			return new Aphront404Response();
			}

			$is_preview = $request->isPreviewRequest();

			$qid = $answer->getQuestion()->getID();
			$aid = $answer->getID();

			// TODO, this behaves badly when redirecting to the answer
			$view_uri = "/Q{$qid}";

			$xactions = array();
			$xactions[] = id(new PonderAnswerTransaction())
			->setTransactionType(PhabricatorTransactions::TYPE_COMMENT)
			->attachComment(
			id(new PonderAnswerTransactionComment())
			->setContent($request->getStr('comment')));

			$editor = id(new PonderAnswerEditor())
			->setActor($viewer)
			->setContinueOnNoEffect($request->isContinueRequest())
			->setContentSourceFromRequest($request)
			->setIsPreview($is_preview);

			try {
			$xactions = $editor->applyTransactions($answer, $xactions);
			} catch (PhabricatorApplicationTransactionNoEffectException $ex) {
			return id(new PhabricatorApplicationTransactionNoEffectResponse())
			->setCancelURI($view_uri)
			->setException($ex);
			}


			if ($request->isAjax() && $is_preview) {
			return id(new PhabricatorApplicationTransactionResponse())
			->setObject($answer)
			->setViewer($viewer)
			->setTransactions($xactions)
			->setIsPreview($is_preview);
			} else {
			return id(new AphrontRedirectResponse())
			->setURI($view_uri);
			}
			}

			}